Participatory interventions for collective action and sustainable resource management: linking actors, situations and contexts through the IAD, NAS and SES frameworks

Overcoming complex environmental challenges demands different forms of stakeholder participation and collective action. While informative and relevant for participatory interventions, the literatures on collective action and participatory governance have largely remained disconnected. We illustrate how the institutional analysis and development (IAD), network of (adjacent) action situation (NAS) and social–ecological system (SES) frameworks can be combined to provide a coherent approach that integrates these literatures, applies their insights and bridges this disconnect. We compare two similar participatory interventions, one in Colombia and one in Peru, whose design and implementation we supported. Transdisciplinary in nature, both sought to foster collective action for watershed management. The frameworks allow us to demarcate, characterise and reflect upon the action situations (ASs) for the collective choice, coordination and knowledge generation that constituted each participatory intervention (i.e. the constituent NAS) and other relevant operational and institutional ASs that lay outside the boundaries of the participatory interventions. These other ASs may not be linked to one another or to the intervention’s constituent NAS, but they influence the outcomes of interest nevertheless, thereby shaping the potential of the participatory interventions for collective action and sustainable natural resource management. The framework then suggests, and our comparative analysis illustrates, that organisers and researchers of participatory interventions, such as multi-actor deliberative platforms and transdisciplinary research projects, should carefully consider, reflect upon and address the constellation of relevant actors, ASs and contexts co-determining the outcomes of interest. Our study demonstrates how the IAD, SES and NAS frameworks can support that endeavour.


Introduction
To stem ecological degradation, halt biodiversity loss and global warming, and attain sustainability, multiple actors and actions require coordination (Ravnborg and Guerrero 1999;Ostrom 2010a;Lubell and Balazs 2018;Dasgupta 2021). Thus, participatory interventions-that is, policy interventions that convene (some of) the relevant actors and stakeholders to attain specific social-ecological and/or institutional outcomes-seem promising for fostering collective action for sustainable resource management (e.g . Ostrom 1990;UNCED 1992;UN 2015;Baland and Platteau 1996;UNECE 1998;Dietz et al. 2003;Muradian and Cardenas 2015;ECLAC 2018). However, the bodies of research on collective action and on participatory governance have separately indicated that the outcomes of participatory processes in the context of natural resource management hinge on their design, scope and reach (Fung 2006;NRC 2008;Reed 2008;Ostrom 2006Ostrom , 2010bDeCaro et al. 2015;Newig et al. 2018;Reed et al. 2018). Despite their relevance for the sound design, implementation and analysis of participatory interventions such as multi-actor platforms and transdisciplinary research projects (e.g. Steins and Edwards 1999;Tribaldos et al. 2020), insights from these two streams of research have remained largely disconnected. In this paper, through a comparative analysis of two similar participatory interventions, we show how combining the institutional analysis and development (IAD) framework (Ostrom 2005(Ostrom , 2011, the network of (adjacent) action situation (NAS) framework (McGinnis 2011a; Kimmich et al. 2022) and the social-ecological system (SES) framework (Ostrom 2009;McGinnis and Ostrom 2014) with central concepts of participatory governance (e.g. Fung 2006;Newig et al. 2018;Reed et al. 2018) provides fruitful ways to integrate these insights and apply them to the design and analysis of participatory interventions.
Research on collective action suggests that allowing the relevant actors to communicate and participate in relevant decision-making processes fosters trust-building and the creation of suitable, legitimate and effective measures for sustainable resource management (Ostrom 1990(Ostrom , 1998(Ostrom , 2006DeCaro et al. 2015;Dannenberg and Gallier 2020). Conversely, solutions that are externally devised and (weakly) enforced can have limited effects if the relevant actors see them unwarranted, unfair, illegitimate and/or illsuited. External solutions may neglect relevant features of the context and waste local capacities and resources. They are likely to have a limited effect and may even backfire if they induce mistrust and resistance, undermine the capabilities of the relevant state and non-state actors or hamper their (intrinsic) motivations to act for the benefit of others and nature (Ostrom 2000(Ostrom , 2007a(Ostrom , 2010bOstrom et al. 1994;Baland and Platteau 1996;Cardenas et al. 2000;Frey et al. 2004;Muradian and Cardenas 2015;Bowles 2016;Heikkila and Andersson 2018;Ezzine-de-Blas et al. 2019).
Complementarily, research on participatory governance has explicitly stressed that, far from being guaranteed, the success of participatory processes hinges on their design, implementation and context (Beierle and Cayford 2002;Jager et al. 2020). At the appropriate stages of the policy process, well-designed participatory interventions can indeed facilitate meaningful and productive interactions among the relevant actors (NRC 2008;Reed 2008;Reed et al. 2018). However, relevant actors, decision-making processes and institutional arrangements outside the boundaries of the participatory intervention may limit its potential if these elements are not adequately considered and involved (NRC 2008;Reed 2008;Edelenbos et al. 2009;Gerlak et al. 2013;Bodin 2017;Lubell and Balazs 2018). In a similar vein, the literature on collective action pinpoints that the participation of a limited set of relevant actors in a limited set of relevant activities and decision-making processes leads to limited effects in terms of trust-building and actual cooperation (e.g. Ostrom 2006Ostrom , 2010bDeCaro et al. 2015). Thus, if collective action is to be promoted, it is essential to recognise and adequately involve the relevant state and non-state actors (or their legitimate representatives) in the relevant decision-making processes and activities concerning the design, monitoring, enforcement and assessment of the relevant institutional arrangements regulating their operations (Ostrom et al. 1994;Ostrom and Nagendra 2006;Poteete et al. 2010;Cox et al. 2010).
Despite being related, these insights have not been systematically integrated. In this paper, we show how researchers and practitioners can purposefully combine the IAD, SES and NAS frameworks (see also Cole et al. 2019;Epstein et al. 2020) and the concepts from participatory governance to integrate and apply these insights. We illustrate this application through a comparative analysis of two similar participatory interventions, transdisciplinary in nature, which we helped design and implement. Both aimed at fostering collective action for sustainable watershed management in the (Colombian and Peruvian) Andes.
The IAD framework provides a general template for organising the situational and contextual factors that influence the prospects for collective action in interdependent action situations (ASs) where particular and aggregate interests may be in conflict (i.e. collective action challenges or social-environmental challenges or dilemmas) (Ostrom 1990(Ostrom , 2011Schlager and Cox 2018;Heikkila and Andersson 2018). Acknowledging that actors interact in several interlinked action spaces, the NAS framework helps to organise the analysis of all adjacent and distant ASs that jointly produce specific sustainability and equity outcomes in complex SES that are sometimes separate yet interconnected (e.g. McGinnis 2011a; Kimmich et al. 2022). It helps operationalise individual and collective decision-making processes as networks of simultaneously or sequentially interlinked ASs. Thus, it offers a template to organise, apply and further develop key concepts of participatory governance. The SES framework, in turn, expands upon the social-ecological and governance-related contextual factors that shape the structure and thus the interactions and outcomes of the relevant NAS (Ostrom 2007b(Ostrom , 2009Poteete et al. 2010;McGinnis and Ostrom 2014). Together, these frameworks help to map the complex constellations of actors, ASs and contextual conditions that any sound policy intervention aimed at fostering collective action should consider (Polski and Ostrom 1999;Heikkila and Andersson 2018;Cole et al. 2019;Epstein et al. 2020).
Previous research has successfully used elements of the IAD and NAS approaches to study policy design (e.g. Polski and Ostrom 1999;Carter et al. 2016) and various processes, such as policy-making (e.g. Pahl-Wostl et al. 2010;Pahl-Wostl 2015;Andersson 2018), multi-level learning (e.g. Pahl-Wostl et al. 2010;Pahl-Wostl 2015), decentralisation (e.g. Clement 2010;Epstein et al. 2020), comanagement (e.g. Whaley and Weatherhead 2014) and telecoupling (e.g. Oberlack et al. 2018;Boillat et al. 2018). To the best of our knowledge, only a few studies have employed this combined framework approach to study participatory interventions. 1 Some have used the IAD framework to guide the design (e.g. Klok and Denters 2018) and analysis (e.g. Cárdenas and Ortiz-Riomalo 2018) of such interventions. Yet, they do not explicitly and systematically use the NAS framework to define, characterise and assess participatory interventions. Consequently, they do not systematically study the interactions between the broader context, the NAS that constitutes the participatory intervention, and the other relevant ASs that also influence the outcomes of interest. Ortiz-Riomalo et al. (2022) did use the IAD, SES and NAS frameworks in combination to conceptualise and characterise participatory interventions and their potential impacts by reviewing and integrating relevant empirical insights on collective action and participatory governance. However, they did not empirically assess the insights and conclusions derived from their review.
Our study builds upon these previous applications and provides, to the best of our knowledge, (one of) the first empirical application(s) of this combined approach to the analysis of participatory interventions. Therefore, the study's contributions are fourfold. First, it shows how this combined approach helps demarcate and characterise the distinct, yet interconnected ASs that constitute a given participatory intervention (i.e. the constituent NAS). Second, it shows how this approach helps to characterise and analyse the interconnections between the constituent NAS and the other relevant (linked and unlinked) ASs that may also influence the outcomes of interest. Third, it proposes that the absence of adequate linkages between the constituent NASs and other relevant ASs may limit the potential of participatory interventions to foster collective action in complex SESs. Finally, it lays out a conceptual and methodological basis for further assessing this proposition and, more generally, for systematically considering, addressing and incorporating the relevant contexts, actors and ASs in the research and practice of participatory interventions for collective action, such as multi-actor platforms and transdisciplinary research projects (e.g. Steins and Edwards 1999;Tribaldos et al. 2020).
After describing the main elements of the conceptual framework of this study in the next section, in the third section we briefly describe and discuss the data as well as the data analysis methods that form the basis of our conclusions. The fourth section presents and discusses the results of the comparative analysis, and the last section summarises the conclusions, contributions, limitations and implications of our study.

Collective action challenges
In a given complex SES such as a river watershed, ecological, institutional and social outcomes are the result of proximate, distant, multi-level and interdependent decisionmaking processes. These involve multiple, often heterogeneous actors in terms of their preferences, beliefs, endowments, location, affiliations and backgrounds (Edwards and Steins 1998;Ravnborg and Guerrero 1999;Ostrom 2005;Oberlack et al. 2018;Cole et al. 2019;Reed et al. 2020). Day-to-day operational land, resource, input and technology use decisions in one part of the system have socioeconomic and ecological implications locally and elsewhere. Institutional arrangements-crafted and enforced through formal and informal collective decision-making at different government levels-influence and are shaped by these operational decisions and outcomes. Furthermore, processes and outcomes in distant systems may interact with these through, for instance, complex value chains and seemingly distant ecological processes Boillat et al. 2018;Villamayor-Thomas et al. 2019).
Hence, to attain socially desirable outcomes, such as just and sustainable food and water provision and nature protection in a given SES, the relevant actors need to coordinate their decisions and actions, often in multiple (types of) action spaces (Ostrom 1990(Ostrom , 2005Kimmich 2013;Lubell and Balazs 2018;Kimmich and Villamayor-Tomas 2019;Reed et al. 2020). Actors need to address potential tensions between individual and collective interests and build shared understandings and collective agreements on desirable outcomes, actions, decision-making processes and allocation of costs and benefits (e.g. a price, reward and/or punishment scheme to ensure sensible water consumption and equitable sustainable land use for stable and equitable water provision and distribution) (Ostrom 1990(Ostrom , 1999Lubell and Balazs 2018). According to the IAD framework, expanded upon by the NAS and SES frameworks, the structure of the relevant decision and action situations, along with the attributes of the relevant actors and the broader context, jointly determine the prospects for collective action Ostrom 1982, 1987;Ostrom 2005Ostrom , 2010bOstrom , 2011Poteete et al. 2010;McGinnis 2011a, b;Schlager and Cox 2018;Cole et al. 2019). In the following, we expound on these aspects, marking the main concepts in italics.

Action situations (ASs) and network of action situations (NASs)
An action (or decision) situation (AS), the focal unit of analysis of the IAD framework, is the situation (i.e. the space, the setting) wherein action takes place and wherein actors make choices, interact and generate intended and unintended outcomes (Ostrom 1990(Ostrom , 2005. A particular type of AS can have several iterations and thus allow for repeated interactions (Ostrom 2005). In an AS, actors (i.e. the participants in that AS) make interdependent choices based upon the positions they occupy (i.e. the roles they play), their information about potential outcomes, costs and benefits of their own and other actors' possible actions, and the level of control and influence they have over those actions and outcomes. These main elements-actors, positions, actions, outcomes, costs and benefits, information and control-are the seven basic working components that define the structure of an AS (McGinnis 2011a; Ostrom 2005Ostrom , 2011. See Fig. 1 at the end of this section. Decisions, actions and interactions may take place in distinct, yet sequentially or simultaneously interlinked (a) operational and (b) institutional ASs (Ostrom 1990(Ostrom , 2005Ostrom et al. 1994). That is, actors may interact around (a) the actual use of natural resources and/or (b) the design, enforcement and assessment of possible institutional arrangements 2 and processes to govern resource use. 3 It is then possible to delineate the boundaries of an AS based on the types of activities taking place therein (e.g. provision, appropriation, learning, rule-making and social mobilisation) (see Ostrom 1990Ostrom , 2005Ostrom et al. 1994;McGinnis 2018). This is the approach we follow in this paper. 4 The focal AS is the AS in which the critical decisions and interactions that produce the outcome(s) of interest take place (Kimmich 2013;McGinnis 2018;Cole et al. 2019). In water management, for instance, interactions around the provision and appropriation of water resources constitute the focal AS (Ostrom and Gardner 1993;Lubell et al. 2002;Cardenas et al. 2011;McGinnis 2018). 5 An AS is said to be adjacent to another AS whenever its outcomes influence at least one of the working components and thus shape the structure of the other AS. Two or more adjacent ASs constitute a network of (adjacent) action situation (NAS) (McGinnis 2011b;Kimmich 2013;Cole et al. 2019). The relevant NAS encompasses all the relevant ASs and actors that influence the focal AS (Kimmich 2013; McGinnis 2018) and thus (co-)determines the critical outcomes of interest, such as the amount and distribution of clean water and the socioeconomic status of water users in a watershed (Ostrom and Gardner 1993;Lubell et al. 2002;Cardenas et al. 2011). Lastly, distant ASs then correspond to those ASs that indirectly influence the focal AS through (a chain of) other distant or adjacent ASs Boillat et al. 2018).
ASs link to one another through their common participants and their outcomes, which affects one another's working components. That is, ASs connect through (a) biophysical processes, such as changes in biodiversity, water quality and the state of physical infrastructure; (b) institutional arrangements and processes; (c) actors-including impacts on actors' attributes, such as their beliefs and preferences-; and (d) flows of information (McGinnis 2011b(McGinnis , 2018Kimmich 2013;Cole et al. 2019). Actors may participate in one or several ASs to influence outcomes in desired directions. They may also coalesce with other individuals and organisations to advance joint strategies in one or several ASs within the relevant NAS. The study of the NAS, then, leads to consider the broad constellation of actors, as well as the broad constellation of ASs in which they participate and interact, to understand the underlying causes of specific 2 Formal or informal rules and shared strategies to overcome collective action challenges (North 1994;Ostrom 2005;Cole 2017). 3 The IAD and NAS frameworks generally recognise three main levels of choice and action: operational, collective and constitutional. The latter two, respectively, correspond to (collective) decisions on the design and enforcement of operational institutional arrangements (e.g. those that regulate resource use operations) and (constitutional) decisions on who can participate in the collective decision-making process and how. The institutional-choice level encapsulates these two (Ostrom 1990, Ch. 6). Hence, in this paper, we only distinguish between the institutional and operational levels for the sake of simplicity and because we do not delve into the constitutional choice level. 4 For alternative ways to define the boundaries of ASs, see Pahl-Wostl et al. (2010) and McGinnis (2011a). For a review, see Oberlack et al. (2018) and Kimmich et al. (2022). 5 A focal AS need not be associated with a specific geographical region or locality. Ostrom and Gardner (1993), Lubell et al. (2002) and Cardenas et al. (2011), for example, set the focal operational AS at the watershed level, where water provision and appropriation involving multiple actors and localities takes place. We follow this approach in this paper. outcomes, to effectively influence them in desired directions (e.g. towards more sustainability, equity, empowerment and/or efficiency).

Context
Naturally occurring processes and previous outcomes of adjacent ASs then constitute the contextual conditions that influence the working components and thus shape the structure of the focal AS and associated relevant NAS (McGinnis 2011a(McGinnis , 2018Kimmich 2013;Cole et al. 2019). The IAD framework and its extension, the SES framework, thus cluster these contextual elements in the biophysical conditions of the resource system, the features of the institutional arrangements and processes (i.e. the governance system) and the social, economic and cultural attributes of the relevant actors (Ostrom 2007b(Ostrom , 2009Poteete et al. 2010

Participatory interventions
Under this framework, and based on previous contributions from institutional and behavioural economics (e.g. Bates 1988; Ostrom 1990Ostrom , 2010bMuradian and Cardenas 2015;Bowles 2016;Cárdenas 2018;Heinz and Koessler 2021;Velez and Moros 2021), it is thus possible to state that participatory policy interventions may seek to foster collective action in the focal AS. They do this by addressing and/or influencing the relevant attributes of (a) actors (e.g. their knowledge, beliefs, preferences or values) and/or (b) the governance system (e.g. specific rules or collective decision-making processes) (Ortiz-Riomalo et al. 2022). The intervention's ultimate impact will depend on whether and how it effectively influences the relevant NAS, its patterns of interactions and outcomes (Kimmich 2013;Carter et al. 2016).
A further distinction can be made between two types of ASs when defining, characterising and analysing participatory interventions. First, there is the NAS that the designers and organisers of a participatory intervention directly create, design, intervene in or shape (i.e. the intervention's constituent NAS) (see also Klok and Denters 2018). This constituent NAS thus set the boundaries of a participatory intervention. Commonly, these constituent ASs enable the participants to receive, provide or exchange information that allows them to adjust their strategies, norms and rules to attain better collective outcomes. The specific structure of these constituent ASs is set by the design features and participatory methods (e.g. participatory modelling, games, social cartography and deliberative exercises) that the organisers use to facilitate actors' interactions (e.g. Beierle and Cayford 2002;Cárdenas et al. 2003;Fung 2006;Kallis et al. 2006;Klok and Denters 2018;Ortiz-Riomalo et al. 2020;Reed 2008;Rowe and Frewer 2005;Von Korff et al. 2010;Voinov and Bousquet 2010;Medema et al. 2016). Jointly, and also influenced by the broader context, these methods and their specific arrangement determine the set of participants and the participants' roles in the process, possible actions and potential outcomes. They also determine the informational and knowledge bases for the actors' choices, as well as the degree of control actors have over the process and its outcomes.
The second type of relevant ASs encompasses those outside the boundaries of the participatory intervention. The designers and organisers of the intervention cannot directly shape these. In addition, these ASs may or may not link to one another and/or to the constituent NAS, but they (may) nonetheless influence (a) the constituent NAS in uts structure, interactions and outcomes and (b) the general outcome(s) of interest (see also NRC 2008; Edelenbos et al. 2009;Pahl-Wostl et al. 2010;Pahl-Wostl 2015;Klok and Denters 2018).
Based on the literatures on collective action and participatory governance, the potential of participatory interventions for collective action generally depends on the types of connections and interactions they facilitate between the actors, relevant ASs and the context. First, their potential hinges on the structure and internal linkages of the constituent NAS. These should facilitate communication, shared understandings and collective agreements among the participants, while properly considering the relevant features of the context (Ostrom 2006(Ostrom , 2007bNRC 2008;Reed 2008;von Korff et al. 2010;Cardenas et al. 2011;Schill et al. 2016;Heikkila and Andersson 2018): the biophysical conditions (e.g. geographical distances, types of ecosystems and existing facilities), the governance system (e.g. regulations for resource use and stakeholder participation in resource management), and the specific actors' attributes (e.g. in terms of preferences, expectations and unequal endowments) (McGinnis and Ostrom 2014; Cole et al. 2019). Adequately addressing these interactions between elements of the biophysical conditions, governance system and actors' attributes requires, in turn, a transdisciplinary approach to incorporate and apply the different relevant sources of knowledge (e.g. Lang et al. 2012).
Second, their potential also depends on the way they connect with other relevant (adjacent and distant) ASs and actors outside the boundaries of the participatory intervention. If not properly considered, these relevant actors and ASs can limit, neglect and/or override the outcomes of participatory interventions (e.g. through lobbying, legislation, litigation, social mobilisation and bureaucratic hurdles in other formal and informal spaces) (Edelenbos et al. 2009;Quist et al. 2011;Gerlak et al. 2013;Bodin 2017;Klok and Denters 2018;Newig et al. 2018;Boillat et al. 2018;Epstein et al. 2020).
Based on the above, we can then propose that successful participatory interventions are those that are adequately embedded in the relevant context. That is, (a) the design of the constituent NAS fit the context and (b) the constituent NAS have proper actor, knowledge and/or institutional linkages with other relevant ASs located outside the boundaries of the participatory intervention. An adequate link is established under one or two conditions. The first is that the outcomes of the constituent NAS effectively influence-in the desired direction-the interactions and outcomes of the other relevant ASs. Alternatively, the outcomes of these other ASs do not run counter to or over the outcomes of the constituent NAS. It is, therefore, critical to set the boundaries of the relevant NAS and the constituent NAS to identify those (adjacent and/or distant) relevant ASs which the organisers of the participatory intervention cannot directly influence but to which they should seek to establish adequate linkages. This process of setting limits and establishing adequate linkages would determine the degree of inclusivity, as well as the scope and potential, of the participatory intervention. 6 Figure 1 depicts the main elements of this framework for the design and analysis of participatory interventions. The central element of the diagram illustrates the constituent NAS in interaction with those other relevant ASs. The conditions in the biophysical and social systems shape and are subsequently transformed by the outcomes of these ASs. The following section offers a comparative analysis to demonstrate and discuss the application of this combined approach.

Comparative analysis: data and methods
In the next section, we describe, compare and analyse two similar participatory interventions, transdisciplinary in nature, which took place in two Andean watersheds comparable in their general ecological and socioeconomic features. The first intervention took place in the Suratá River Watershed, Colombia, between January 2014 and January 2016, and the second in the Cañete River Watershed, Peru, between October 2018 and March 2019. In each case, we used participatory methods similar in design to foster collective action for sustainable watershed management. Yet, these interventions influenced collective action differently in each case. We use a 'most similar systems design' approach-that is, the difference method (Anckar 2008;Collier 1993;Poteete et al. 2010)-to compare these cases and gain insight into factors that can potentially explain the difference in outcome. Following the concepts and considerations of the previous section, we focus on the linkages between the NAS constituting each participatory intervention and the relevant ASs outside the intervention as the main potential explanatory factor for the differences in outcome. As the cases are similar but naturally not identical, we also compare the context of each case and thus probe for additional potentially relevant explanatory factors.
Our deep engagement as facilitators and academic advisors in the design and implementation of both participatory interventions provided us with access to a rich vein of primary information with which to describe and compare the cases. As primary data sources, we drew on our observations and field 6 We thank an anonymous reviewer for drawing our attention to and highlighting the importance of this point.  Klok and Denters (2018) and, particularly, Cole et al. (2019) notes, the notes from 25 individual and 5 group interviews and the minutes of 17 multi-actor workshops. We also considered secondary sources, including media coverage and the available reports and studies on the resource management challenges of these watersheds (Fonseca Martel and Mayer 1978;CDMB 2006CDMB , 2011Quintero et al. 2013a, b;Francesconi et al. 2016;Tristán-Febres et al. 2018;Sarmiento and Ungar 2014;Stern and Echavarría 2013;Blundo-Canto et al. 2016). These sources complemented the actor analysis, enriched our understanding of both contexts, allowed us to triangulate the interviewees', participants' and our own perspectives and helped us to validate our initial assessments to avoid potential judgement biases. Furthermore, we enriched the analysis with insights from previous project reports and articles in which we had already processed and analysed parts of the information from each case independently (Cárdenas et al. 2015; Cárdenas and Ortiz-Riomalo 2018; Ortiz-Riomalo and Miranda-Montagut 2019; Ortiz-Riomalo et al. 2020). 7 The IAD, NAS and SES frameworks, used in combination, provided us with a systematic guide for organising the data and structuring the case comparison. The structured approach also helped to minimise biases that may have occurred due to our own perspectives and direct involvement in the processes. By following the framework, we were prompted to describe, compare and analyse the interventions across all relevant factors and categories and constantly re-assess our findings. First, we described the main ecological, governance and social attributes of each watershed, thus defining the pre-existing contextual conditions of each participatory intervention. Then, we identified the focal AS and relevant NAS, demarcated the boundaries of the participatory intervention (i.e. the boundaries of the constituent NAS) and established the connections between the NAS constituting the participatory intervention and the other relevant ASs-that is, those ASs outside the boundaries of the intervention that could also influence the outcomes of interest. 8 To trace the boundaries of each AS, the relevant NAS and the constituent NAS, we grouped similar activities according to their function and linked them by their outcomes and participants.
In the online supplementary information, we present the data, underlying guiding questions and resulting case characteristics in detail. 9 Specifically, section S1 expands on the details, scope and limitations of our data. Section S2 includes the specific guiding questions we followed to apply the frameworks and organise the data. Sections S3A and S3B, in turn, summarise the data for each case using the template we derived by combining the methodological guidelines that the IAD, NAS and SES frameworks offer. The analytic description and comparison of the cases that we present in the next section is based on these data. Figures 2  and 3 in "Contextual factors" offer a graphic summary of the main features of each case.

The NAS constituting each participatory intervention
The main aim of the two participatory interventions was to facilitate collective agreements between upstream and downstream resource users on the desired institutional arrangements for securing water provision in their respective watersheds. That is, in both watersheds, the interventions targeted the institutional level-specifically, the collective-choice level-and not the focal AS-where operational decisions and actions on water provision and appropriation take place. Three types of adjacent ASs constituted the participatory processes: knowledge generation, coordination and collective-choice ASs.
The informal collective-choice ASs, created through multi-actor workshops, were the central ASs of the participatory process. The workshops were intended for the relevant state and non-state actors from all sections, sectors and levels of the watershed to meet and to exchange and reflect upon their common challenges, desirable ecological, governance and socioeconomic outcomes and potential joint strategies. For this purpose, we actively encouraged participants to extricate themselves from the roles they occupy in their day-to-day activities and instead take a broader, watershed-wide perspective. Furthermore, we organised participants into subgroups involving representatives of different sections and sectors of the watershed. In the end, the workshops aimed at facilitating shared understandings and agreements on the nature of the collective action challenge and its desirable solutions.
To stimulate reflection and facilitate deliberation, we employed three types of participatory methods, namely economic games, social cartography methods and group-moderation techniques such as the Metaplan. The economic games reflected collective action situations concerning the provision of public goods and the management of common-pool resources. The games raised awareness of the interdependencies among the actors, the tensions that can emerge between individual interests and societal ends, the common goals all participants share and deem desirable, and the appropriate courses of actions that may contribute to socially desirable outcomes (Cárdenas and Ramos 2006;Cardenas and Carpenter 2008;Cárdenas et al., 2013;Janssen et al. 2010;Meinzen-Dick et al. 2016). 10,11 The games recreated collective action challenges similar to the ones participants face in their day-today resource use and management activities. Hence, they facilitated general, rather abstract reflections on collective action problems and their potential solutions, which participants linked to their experiences outside the games.
Subsequently, a social cartography exercise (e.g. Liebman and Paulston 1994) helped participants focus their discussions on the concrete collective action challenges they have been facing in the sustainable management of their watersheds. On maps of their watersheds, participants jointly identified the main current resource uses, discussed their consequences, reflected upon the social-ecological and governance outcomes they would like to realise (e.g. sustainability, biodiversity conservation, sustainable development and participatory decision-making) and outlined specific joint courses of action (e.g. transitions towards cleaner technologies in mining and agriculture).
All these discussions laid the groundwork for the final sub-group and plenary discussions on the general goals and specific objectives and strategies participants deemed desirable and wanted to prioritise for their respective watersheds. Employing group-moderation techniques such as the Metaplan (Schnelle 1978), we strove for each participant to be able to voice their concerns, preferences and general opinions throughout the workshop, providing the tools and the time needed to expound on their ideas.
In adjacent coordination ASs with relevant actors from development and environmental agencies, local authorities, universities and community leaders, we discussed and decided how to best design and implement the collectivechoice multi-actor workshops in each case's specific context. We aimed to involve these diverse relevant actors in the coordination ASs so they would likely follow-up on the process outcomes and eventually realise them through the relevant institutional and operational ASs outside of the boundaries of the participatory intervention.
Finally, research activities comprising desk research, individual and group interviews, and multi-actor workshops made up the knowledge generation ASs (see also Section S1 in the ESM). These were linked to the coordination and collective-choice ASs to support the participants' interactions therein. Through these research activities, we gathered critical information to diagnose the social-ecological context and governance system. This allowed us to identify the relevant actors and ASs that the participatory process should consider, involve and link. We employed the IAD and SES frameworks to guide the search for and consolidation of the relevant information concerning the different elements of the corresponding biophysical conditions, governance systems and actors' attributes. 12

The outcomes of the constituent NAS
From the knowledge generation ASs emerged the knowledge base for the coordination and collective-choice ASs. From the coordination ASs emerged the specific rules, that is, the design features and participatory methods shaping the informal collective-choice ASs of each participatory intervention. From these, a consensus on desirable watershed management strategies gradually emerged. The content and degree of implementation nevertheless varied in each case.
In the Suratá River Watershed, participants contributed to an agenda of watershed governance and sustainable development through eleven multi-actor workshops, one at the páramo 13 level, two at the watershed level and eight at the local level, in the municipalities of the upper and lower watersheds. The agenda comprised six policy areas: environment, governance, agriculture, mining, tourism and social policy. Each contained a desirable goal and a series of policy actions. Nonetheless, the resulting agreement did not address all the relevant concerns driving the existing social-ecological conflicts in the watershed. Namely, it did not address the absolute opposition of downstream users to mining activities in the upper watershed. Nor did it address the disagreements among (upstream and downstream) resource users and the relevant state actors on the delineation and regulation of the protected area for the páramo in the upper watershed. As of 10 We used the watershed game, the public goods game and the trust game, primarily based on the designs by Cárdenas and Ramos (2006) and Cárdenas et al. (2013) June 2021, the relevant actors had not agreed upon the actors and actions that formal institutional arrangements should permit in the upper watershed. In other words, they had not agreed on the boundary and scope rules (see Ostrom 2005) that should govern resource use in the upper watershed. Whereas downstream users were demanding strict conservation measures in the upper watershed, resource users in the upper watershed were reclaiming their right to derive their livelihoods from the economic activities they have traditionally performed, so far without causing major negative impacts on the surrounding ecosystems. This ongoing disagreement has delayed the development and implementation of any major agreement on watershed management involving all relevant resource users.
In the Cañete River Watershed, participants in the only collective-choice multi-actor workshop of the participatory intervention agreed on a general goal for the watershed, two specific objectives for each section of the watershed (lower, lower middle, middle, upper middle and upper) and two management strategies for each specific objective. This agreement is to feed into the watershed management plan of the water resources council, which was in the formation stage at the time of the participatory intervention. In contrast to the Suratá case, none of the participants in Cañete indicated that any major issue had been left out of the agreedupon watershed management recommendations. Moreover, during the multi-actor workshop, representatives of the local hydropower company (the main non-consumptive user of water in the watershed), the Ministry of Environment, the manager of the landscape reserve in the upper watershed, the water utility in the lower watershed and representatives of the downstream farmers (the main users of surface water in the watershed) voluntarily committed to carry out the relevant actions in the corresponding ASs to which they had access. In personal communications with the participants, each reported trusting the others' willingness to take up collective action. They also expressed an understanding that the sustainable management of the watershed is a desirable outcome that hinges on everyone's actions. In fact, some of the agreed-upon measures have already been implemented. For example, in 2019, downstream farmers visited the upper watershed to learn more about the ongoing and potential conservation measures to which they could potentially contribute funding. In addition, representatives of the Ministry of Environment have continued to support the negotiation of conservation and to reward agreements 14 for sustainable water provision in the watershed. However, the agreement participants reached left out specific provisions for the mining, fishing and tourism industries, of some importance in this watershed. Furthermore, the implementation of the agreed-upon measures on waste management and water pollution, as well as the watershed management plan, was still pending as of July 2021.
What factors may have driven these outcomes? The proposition we put forth in "Participatory interventions" leads us to first focus the analysis on the (types of) linkages, or lack thereof, between the constituent NAS and the relevant ASs (and actors) located outside the boundaries of the participatory intervention that could also influence the outcomes of interest.

Other relevant ASs outside the boundaries of the participatory intervention
As noted earlier, in the Colombian case, the participatory intervention did not directly target the focal AS, that is, the operational AS for water provision and appropriation. Instead, it focussed on choice and action at the institutional level. However, we noted relevant formal institutional ASs with no clear connection with the participatory intervention. These formal institutional ASs concern the licensing of mining operations and the delineation of the protected area for the páramo ecosystem. These ASs influence the design and application of boundary and scope rules (Ostrom 2005) regarding the actors and actions allowed in the upper watershed-some of, if not the same critical institutional arrangements for resource use that the participatory process sought to influence. Downstream users pushed for strict commandand-control conservation measures upstream in these ASs, and they did not participate in the watershed level multiactor workshops. In contrast, upstream users sought in both types of institutional ASs (formal and informal) to advance measures that would allow and promote sustainable practices and cleaner production technologies in mining and farming upstream. In sum, downstream and upstream users sought to move their preferences forward in separate, unconnected ASs. This has protracted the disagreement on the rules for resource use in the watershed, limiting the scope and impact of the participatory intervention on collective action.
In contrast, our observations and interviews suggest that in the Cañete case, it was possible to establish proper actor, knowledge and (informal) institutional linkages between the NAS constituting the participatory process and other relevant ASs. In this case, the coordination and collective-choice ASs managed to convene most of the relevant actors involved in water resources management in this watershed. They included representatives of the environmental authorities, the landscape reserve management committee (in the upper watershed), the hydropower company, the water utility company from the lower watershed and the main downstream agricultural water user committees and boards. Moreover, participants agreed to follow-up on and further develop and implement the outcomes of the informal collective-choice ASs in other formal institutional ASs (i.e. the existing multiactor governance platforms for land and water use in this watershed) and their day-to-day operations in other sections of the watershed. Nonetheless, as of July 2021, no clear link had been made to operational ASs involving the monitoring of water quality, the management of waste and the use of mining and fishing resources. Participants noted the lack of this linkage and the need to connect with the relevant actors to realise concrete action in these areas in the near future (i.e. with the local mayors, mining companies, local water utilities, local water authorities, fishers' organisations and tourism organisations). They also stressed the importance of moving forward the formation and consolidation of the water resources council. This would allow the integration of different perspectives and existing multi-actor governance platforms to design and adopt a comprehensive watershed management framework, which would draw on the outcomes of the participatory intervention.
The above analysis suggests that the (absence of) proper linkages between the NAS constituting the participatory intervention and other relevant ASs shaped the scope and implementation of the agreements that participants reached during the participatory process. However, our analysis also suggests that some pre-existing contextual conditions concerning the attributes of the relevant actors and governance system may also help explain the observed differences in the outcomes of each case. We review these in the following.

Contextual factors
In the Suratá River Watershed, upstream and downstream users have generally held conflicting preferences on the boundary and scope rules for resource use in the upper watershed. Downstream users, most of them urban dwellers and the main users of surface water for household consumption in the watershed, have deemed it critical to adopt strict conservation measures upstream to secure water provision downstream. Upstream users, traditionally reliant on mining and farming to secure their livelihoods, have instead favoured institutional arrangements that allow for these activities in the upper watershed, provided they use cleaner technologies and sustainable land use practices.
Our observations and interviews indicate that tensions between upstream and downstream water users around the actors and actions that should be allowed in the upper watershed influenced their willingness to participate in the informal collective-choice AS that the participatory intervention facilitated. Downstream users have staunchly opposed the ('express', that is, rushed) licensing of any new (large-scale) mining operations upstream. They have also objected to any delineation of the protected area of the páramo that may allow (large-scale) mining and (unsustainable) farming within the protected area. They have coalesced with other non-state national and international actors to put pressure on the corresponding environmental authorities. They have also litigated before the courts against the páramo delineation Fig. 2 Representation of the PI in Suratá using the IAD, NAS and SES frameworks. Source: Own elaboration. Graphic representation leaning on Cole et al. (2019). Case-specific pre-existing conditions are underlined initially proposed by the Ministry of Environment in 2014, which allowed some forms of mining and agriculture in the upper watershed. A combination of downstream users' strong preference for strict conservation upstream, popular support for these preferences, and access to relevant institutional ASs external to the participatory intervention may help to explain the reluctance of downstream users to seek a compromise with upstream users on less strict conservation measures through the participatory process. Consequently, tensions and disagreements on the institutional arrangements that should govern resource use in the upper watershed have remained difficult to address and resolve.
In the Cañete River Watershed, we did not find any major open disagreements between upstream and downstream users on the rules for governing resource use by the time the participatory process had begun. Furthermore, to the best of our knowledge, no relevant actor has opposed the idea of finding a consensus on the appropriate watershed management measures involving all relevant actors from the different sections of the watershed. Despite previous specific conflicts between some upstream and downstream water users, they all showed an interest in finding ways to bring the relevant actors together to build collective agreements for sustainable watershed management.
Our observations, interviews and data suggest that, in both cases, features of the broader, pre-existing institutional arrangements that set the stage for each participatory intervention likely influenced the aforementioned patterns of conflict and co-operation. They also seem to have influenced the attractiveness of crafting collective agreements to move institutional preferences forward through participatory processes. The delineation of protected areas for páramo ecosystems and strict conservation measures forbidding mining and restricting agriculture within páramos have become prominent features of Colombia's environmental policies regulating land and resource use in the country's Andean high mountains (Sarmiento et al. 2013;Ungar 2021). In contrast, these types of strict command-and-control conservation measures seem not to have been central to the environmental and natural resource management policies for Peru's upper watersheds. Largely motivated by the recently approved law on rewards for ecosystem services, the main interest of the environmental authorities has been to facilitate upstream-downstream agreements around ecosystem services provision. 15 By the time the participatory intervention had begun in Cañete, the Peruvian Ministry of Environment, the landscape reserve management and the farmers' community organisations had already been working together on the implementation of conservation and sustainable agriculture measures in the upper watershed. Furthermore, the National Water Authority, part of the Ministry of Agriculture, had not moved forward in the delineation of strictly protected areas for water sources in the upper watersheds, even though the Peruvian water resources legislation would 15 The Reward for Ecosystem Services Law in Peru (i.e. Law 30215). allow such a policy measure. 16 Instead, it had put forward the creation of a water resources council to promote integrated and participatory water resources management in the Cañete River Watershed-as in other Peruvian watersheds. In sum, in Cañete, there were neither actors requesting nor laws enforcing restrictive command-and-control conservation measures upstream by the time the participatory process started. In fact, we have observed that the current legislative framework has been rather insistent on the need to find ways to bring the relevant resource users and state and nonstate actors together to find common ground, build shared understandings and craft collective agreements on watershed management. 17 The analysis of these pre-existing contextual conditions complements our initial assessment. It suggests that a configuration of factors, rather than a single factor, may explain the observed differences in the outcomes of each participatory intervention. In addition to the linkages-or the lack thereof-between the constituent NAS and other relevant ASs outside the boundaries of the participatory intervention, two other factors seem relevant. The first involves the initial attributes of the relevant actors, 18 including their preferences, perceived levels of conflict and co-operation, and available resources (e.g. to form coalitions and access relevant ASs). The second factor entails the features of the broader governance system, namely the institutional arrangements regulating resource use and biodiversity conservation in the Andean high mountains. 19 Based on these findings, our analysis also hints at the design features participatory interventions should consider. Although the type of participatory intervention in our two cases seems to work to foster collective action among the involved actors, engaging other relevant actors and ASs when high initial levels of conflict are present warrants further effort and the use of complementary methods (see also NRC 2008). In particular, an overarching, all-encompassing participative strategy, embedded in the institutional context and supported by the relevant state actors (e.g. backed up by the broader judicial system), may contribute to involving and bringing together all the relevant actors to craft comprehensive collective agreements. This may be particularly important in cases in which actors seem unwilling to compromise by considering less-preferred options and have access to other relevant ASs to move their preferences forward. Complementary strategies, such as iterative bilateral negotiation ASs, may help address hard pre-defined institutional preferences and facilitate shared understandings and collective agreements (see also Ostrom 1990;Beierle and Cayford 2002;NRC 2008;Edelenbos et al. 2009;Bodin 2017). 20

Conclusion
Insights from research on collective action and research on participatory governance indicate that participatory processes should carefully address the complexity of the relevant (social-ecological and governance) context to effectively foster collective action and sustainable natural resource management. In our study, we show how combining the IAD, NAS and SES frameworks with key concepts on participatory governance helps to synthesise and apply insights which were hitherto largely disconnected. In particular, this combined approach helps us to define, characterise and reflect upon participatory interventions as a series of distinct but interconnected constituent NAS in interaction with other relevant ASs that can also influence the outcomes of interest. Based on the specific features of each case, these ASs can be adjacent or distant and linked or unlinked to the ASs that constitute the participatory intervention. The potential of participatory interventions for collective action thus depends on the structure of the constituent NAS, the other relevant ASs, the linkages-or lack thereof-between all of these, and the attributes of the relevant actors and the broader context. Sound design, implementation, assessment and analysis of participatory processes should thus consider and address the complex interactions and linkages between these factors.
Our comparative analysis of two similar participatory interventions, one in Colombia and another in Peru, illustrates this proposition. In the Colombian case, (the lack of connection 16 See section 75 of the Water Resources Law in Peru (i.e. Law 29338). 17 Both the aforementioned Water Resources Law and Reward for Ecosystem Services Law provide for stakeholder participation in natural resource management, for instance. 18 Beierle and Cayford (2002), NRC (2008), Fritsch (2009), Fritsch andNewig (2012), Bodin (2017) and Newig et al. (2018) provide additional insights on the relevance of context and actors' attributes to participatory processes. 19 On the interplay between the overarching governance system context and participatory processes, see Beierle and Cayford (2002), Kallis et al. (2006), Reed (2008), NRC (2008), Gerlak et al. (2013), Bodin (2017), and Lubell and Balazs (2018). 20 After years without progress on defining the relevant institutional arrangements, the Colombian Ministry of Environment has now been directly leading the consultation and consensus-building process to delineate, zone and plan the management of the páramo in the Suratá river upper watershed after the Constitutional Court declared the initial 2014 delineation unconstitutional in 2016. The direct leadership of the ministry following the court's mandate and guidelines hints at a participatory process which now seems to be more embedded in the broader governance system. This resonates with the (rather successful) collective action processes and negotiations on watershed management among heterogenous actors in the shadow of the Californian state courts that Ostrom described in 1990 (see Ch. 4 in particular).

3
with) other relevant operational and institutional ASs limited the potential of the participatory intervention for collective action. Outside the participatory process, before the courts and the environmental authorities as well as in the streets, a coalition of downstream users and non-state actors continuously pushed for stricter conservation measures in the upper Suratá watershed, hindering any form of collective agreement for water management involving both upstream and downstream users. In contrast, in the Peruvian case, the participatory intervention seems to have managed to address, include, and link the relevant actors, context and operational and institutional ASs, facilitating upstream-downstream agreements and concrete actions for sustainable watershed management. The presence of institutional arrangements and relevant actors already favouring upstream-downstream agreements and co-operation may have also contributed to this outcome. Nonetheless, a lack of progress in defining measures for wastewater management and watershed management plans shows how the (lack of) action by relevant actors in other relevant ASs (e.g. local mayors interacting in local councils and the water resources council) can nonetheless stall actual co-operation on the ground. In all, these findings further highlight the importance of thoroughly and appropriately considering, including and linking the broader constellation of relevant actors, (linked and unlinked) ASs and (ecological, governance and social) context. Although the NAS approach tends to focus on ASs that are linked to one another, our study indicates the importance of considering all relevant ASs influencing the outcomes of interest. 21 More generally, this comparative analysis illustrates how researchers and practitioners could apply the IAD, NAS and SES frameworks to the design and analysis of participatory interventions such as mini-publics, facilitated multi-actor forums and transdisciplinary action-oriented research projects (e.g. Fals-Borda 1987;Cárdenas et al. 2003;Fung 2003Fung , 2006Kallis et al. 2006;Lang et al. 2012;Tribaldos et al. 2020). They invite researchers and practitioners to thoroughly reflect upon the structure and connections of the relevant ASs (both those constituting and those outside the boundaries of the participatory intervention), the interactions they can facilitate and the ways in which the (available information about the) context can shape their structure, connections, interactions and outcomes. More empirical research should, however, help identify further possible nuances, examine the relative importance of specific explanatory factors and assess the generalisability of our findings. Even though general insights from the frameworks guided both interventions and our own analysis and learning process, we did not use them ex-ante to systematically design, implement and plan the assessment of both interventions. We used them ex-post to organise our data, identify all potentially relevant explanatory factors and structure the case comparison. Moreover, the participatory interventions we analysed, albeit similar, were not identical. We cannot rule out that there were design and contextual features, as well as interactions between them, that we did not capture but that influenced the observed outcomes. For instance, despite our systematic efforts to identify all relevant ASs, we may have disregarded the indirect influence of asymmetric interactions involving relevant distant actors and ASs. Furthermore, factors that seem not to have influenced the outcomes in our cases-such as the geographical distance between the upper and lower watersheds-may be relevant in other cases. To neatly disentangle the impact of such factors is extremely difficult, if not impossible, in very small-n case comparisons such as the one we performed in this paper. Researchers and practitioners could, therefore, strive from the outset to implement large-scale evaluations (e.g. Newig et al. 2019;Jager et al. 2020) or causal case study methods, such as process tracing methods (Beach and Pedersen 2016), to neatly identify the underlying causalities.
Future (transdisciplinary) research efforts can draw on the approach we have outlined and applied in this study to carefully design, implement, compare, analyse and assess, in a controlled fashion, a larger number of participatory processes. Through our illustrative application, we hope we can motivate further research. Our study suggests a methodological template-amenable to further refinements and improvements-that can contribute to guiding such efforts. Future implementations and evaluations of participatory interventions may then expand the set of relevant explanatory factors and evaluative criteria for the outcomes of participatory processes, in terms of sustainability and multiple dimensions of equity, justice and empowerment, see for example Lukes (2005), Boillat et al. (2018), Morrison et al. (2019) and Epstein et al. (2020). Further, (the implications of) alternative definitions of and approaches to tracing the boundaries of relevant NASs and participatory interventions could be tested by drawing, for instance, on complementary landscape or telecoupling approaches Boillat et al. 2018;Reed et al. 2020;Kimmich et al. 2022). Such analyses may shed further light on ways to best address actors' heterogeneous attributes in terms of their influence and access to the relevant (networks of) ASs, as well as their pre-existing patterns of conflict and co-operation. Overall, these efforts would and should contribute to gaining and accumulating new knowledge about the participatory methods, process design, relevant contextual conditions and linkages between actors and ASs that enable participatory interventions to fulfil their potential for collective action and sustainability in natural resource management.

Supplementary Information
The online version contains supplementary material available at https:// doi. org/ 10. 1007/ s11625-022-01215-x. 21 We thank to the guest editors for drawing our attention towards and noting the importance of this point. provinces) and Lima that participated in the activities comprising the participatory processes we describe in this paper. We also gratefully acknowledge the support and contribution of several individuals and organisations at various points during these processes. Carlos Kong, Estefany Siccha and Alejandra Zúñiga, in Peru, and Daniel Rivera and Jorge Rincón, in Colombia, industriously provided research and logistical assistance in the field. The Alexander von Humboldt Biological Resources Research Institute, the Ministry of the Environment and the sub-national environmental authorities (CDMB and CORPONOR) contributed with useful information and valuable logistical support in several instances during the activities conducted in Colombia. PROMAC (GIZ's environmental program in Colombia) and USAID's ABC-LA program contributed funding, and Foro Nacional por Colombia provided valuable input in coordinating the realisation of several of the planned activities in the field. In Peru, GIZ's ProAmbiente II, the MERESE-FIDA project, the Institute for Nature, Earth and Energy at the Pontifical Catholic University of Peru (INTE-PUCP), the Nor Yauyos Cochas landscape reserve (RPNYC), L+1 and CELEPSA actively participated by providing their views, ideas, logistical support and funding in the design and implementation of the participatory process. All the aforementioned individuals and organisations are disclaimed of any responsibility regarding the views and arguments expressed in this paper, but we do want to thank all of them for readily contributing with their time, input and help when it was requested.
Author contributions Initial basic concepts on aims, scope, structure and study design for this paper were developed by JFO-R and A-KK and, subsequently, enriched by YM-M and JCC. JFO-R and YM-M extracted and organised the data from the cases for the comparative analysis. JFO-R took the lead in writing and revising initial outlines as well as full drafts of the paper including preliminary analysis of the data, figures and supplementary material. A-KK and YM-M further contributed writing, feedback and revisions of outlines and previous drafts of the manuscript, figures and supplementary material. JCC provided additional feedback on previous drafts of the manuscript. Based on his previous experience in the field, JCC suggested employing economic games as participatory tools for collective action in watershed management, thereby laying out the basic design features of the participatory interventions carried out in Colombia and Peru. JFO-R joined him in developing the design of the intervention in the Suratá River Watershed and implemented it in the field. YM-M supported the implementation of the initial activities of this intervention. A-KK and JFO-R-together with Stefanie Engel (Osnabrück University)-adapted the intervention design to the Peruvian case. JFO-R and YM-M were in charge of coordinating and implementing it in the field, together with the partner organisations, in the Cañete River Watershed. JCC provided additional feedback and academic advice throughout the design and implementation of the participatory interventions and the process of writing and revising the current manuscript.
Funding Open Access funding enabled and organized by Projekt DEAL. Part of the time Ortiz-Riomalo and Koessler spent on this paper was supported by the Alexander von Humboldt-Foundation within the framework of the Alexander von Humboldt-Professorship endowed by the Federal Ministry of Education and Research and granted to Stefanie Engel in form of the professorship of environmental economics at Osnabrück University. Ortiz-Riomalo received complementary funding from the Ministry for Science and Culture of Lower Saxony (Germany).

Data availability
The data employed for the comparative analysis reported in this paper are available in the Supplementary file 1.

Conflict of interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Neither the funding bodies nor the partner organisations involved in the implementation of the participatory interventions had direct influence on the concepts, arguments, analysis, discussion or conclusions of the paper.
Statement of exclusive submission This paper has not been submitted elsewhere in identical or similar form.
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