Abstract
Context
Although small isolated habitat patches may not be able to maintain a minimum viable population, small patches that are structurally isolated may be functionally connected if individuals can cross the gaps between them, in which case, their areas could be added to form a larger habitat patch, eventually surpassing the size threshold for holding a viable population.
Objectives
We studied whether models based on the size and isolation of habitat patches could be used to predict the distribution of the Chestnut-throated Huet-Huet (Pteroptochos castaneus) in fragmented landscapes of the coastal range of the Maule region, central Chile.
Methods
We selected seven 10,000-ha landscapes (8.4–70.7% forest cover). For each habitat patch we made 18 predictions of the presence of the species based on the combination of two thresholds: three critical patch sizes for maintaining a viable population (62.5, 125 and 250 ha) and six critical isolation distances between patches (0, 10, 50, 100, 150 and 200 m). We used playbacks in 59 sampling points to estimate the species’ presence/absence. We used logistic regressions to test whether the output of the patch-matrix models could explain part of the variation in the presence of Pteroptochos castaneus.
Results
The best predictions for the presence of P. castaneus were obtained with the most conservative scenarios (125–250 ha to 0–10 m), including a positive effect of the understory cover and a lack of effect of the forest type (native or exotic).
Conclusions
Our findings suggest that the long term persistence of P. castaneus may depend on the existence of large and/or very connected forest tracts.
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References
Alderman J, McCollin D, Hinsley SA, Bellamy PE, Picton P, Crockett R (2005) Modelling the effects of dispersal and landscape configuration on population distribution and viability in fragmented habitat. Landscape Ecol 20:857–870
Awade M, Boscolo D, Metzger JP (2012) Using binary and probabilistic habitat availability indices derived from graph theory to model bird occurrence in fragmented forests. Landscape Ecol 27:185–198
Ball SJ, Lindenmayer DB, Possingham HP (2003) The predictive accuracy of population viability analysis: a test using data from two small mammal species in a fragmented landscape. Biodivers Conserv 12:2393–2413
Belisle M, Desrochers A (2002) Gap-crossing decisions by forest birds: an empirical basis for parameterizing spatially-explicit, individual-based models. Landscape Ecol 17:219–231
Betts MG, Forbes GJ, Diamond AW (2007) Thresholds in songbird occurrence in relation to landscape structure. Conserv Biol 21:1046–1058
Boscolo D, Metzger JP, Vielliard JME (2006) Efficiency of playback for assessing the occurrence of five bird species in Brazilian Atlantic Forest fragments. An Acad Bras Cienc 78:629–644
Buckland ST, Burnham KP, Augustin NH (1997) Model selection: an integral part of inference. Biometrics 53:603–618
CONAF (2017) Situación diaria de incendios forestales. http://www.conaf.cl/situacion-nacional-de-incendios-forestales/. Accessed Jan 2017
CONAF, CONAMA, BIRF, Universidad Austral de Chile, Pontificia Universidad Católica de Chile and Universidad Católica de Temuco (1999) Catastro y evaluación de los recursos vegetacionales nativos de Chile. Informe nacional con variables ambientales, Santiago
Crooks KR, Sanjayan M (eds) (2006) Connectivity conservation. Cambridge University Press, New York
Díaz IA, Armesto JJ, Reid S, Sieving KE, Willson MF (2005) Linking forest structure and composition: avian diversity in successional forests of Chiloe Island, Chile. Biol Conserv 123:91–101
Echeverría C, Coomes D, Salas J, Rey-Benayas JM, Lara A, Newton A (2006) Rapid deforestation and fragmentation of Chilean Temperate Forests. Biol Conserv 130:481–494
Estades CF (1997) Bird-habitat relationships in a vegetational gradient in the Andes of central Chile. Condor 99:719–727
Estades CF, Temple S (1999) Deciduous-forest bird communities in a fragmented landscape dominated by exotic pine plantations. Ecol Appl 9:573–585
Fahrig L (2002) Effect of habitat fragmentation on the extinction threshold: a synthesis. Ecol Appl 12:346–353
Fahrig L (2003) Effects of habitat fragmentation on biodiversity. Annu Rev Ecol Evol Syst 34:487–515
Fahrig L (2013) Rethinking patch size and isolation effects: the habitat amount hypothesis. J Biogeogr 40:1649–1663
Forman RTT (1995) Land mosaics: the ecology of landscapes and regions. Cambridge University Press, New York
Franklin IA (1980) Evolutionary change in small populations. In: Soulé ME, Wilcox BA (eds) Conservation biology: an evolutionary-ecological perspective. Sinauer Associates, Sunderland, pp 135–149
Hosmer DW, Lemeshow S (2000) Applied logistic regression, 2nd edn. Wiley, New York
Kadoya T (2009) Assessing functional connectivity using empirical data. Popul Ecol 51:5–15
Kindlmann P, Burel F (2008) Connectivity measures: a review. Landscape Ecol 23:879–890
Lens L, Van Dongen S, Norris K, Githiru M, Matthysen E (2002) Avian persistence in fragmented rainforest. Science 298:1236–1238
Nanin M, Palomares F, Brito D (2015) The jaguar’s patches: viability of jaguar populations in fragmented landscapes. J Nat Conserv 23:90–97
Powell LL, Cordeiro NJ, Stratford JA (2015) Ecology and conservation of avian insectivores of the rainforest understory: a pantropical perspective. Biol Conserv 188:1–10
Prugh LR, Hodges KE, Sinclair AR, Brashares JS (2008) Effect of habitat area and isolation on fragmented animal populations. Proc Natl Acad Sci USA 105(52):20770–20775
R Core Team (2013) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna. http://www.R-project.org/
Radford JQ, Bennett AF, Cheers GJ (2005) Landscape-level thresholds of habitat cover for woodland-dependent birds. Biol Conserv 124:317–337
Ramírez-Collio K, Vergara PM, Simonetti JA (2017) Converting clear cutting into a less hostile habitat: the importance of understory for the abundance and movement of the Chestnut-throated Huet-Huet (Pteroptochos castaneus: rhinocryptidae). Forest Ecol Manag 384:279–286
Reid S, Cornelius C, Barbosa O, Meynard C, Silva-García C, Marquet P (2002) Conservation of temperate forest birds in Chile: implications from the study of an isolated forest relict. Biodivers Conserv 11:1975–1990
Saunders DA, Hobbs RJ, Margules CR (1991) Biological consequences of ecosystem fragmentation: a review. Conserv Biol 5:18–32
Saura S, Rubio L (2010) A common currency for the different ways in which patches and links can contribute to habitat availability and connectivity in the landscape. Ecography 33:523–537
Saura S, Torné J (2009) Conefor Sensinode 2.2: a software package for quantifying the importance of habitat patches for landscape connectivity. Environ Model Softw 24:135–139
Sieving K, Willson M, de Santo T (2000) Defining corridor functions for endemic birds in fragmented south-temperate rainforest. Conserv Biol 14:1120–1132
Stevens VN, Baguette M (2008) Importance of habitat quality and landscape connectivity for the persistence of endangered Natterjack Toads. Conserv Biol 22:1194–1204
Thorton DH, Branch LC, Sunquist ME (2012) Response of large galliforms and tinamous (Cracidae, Phasianidae, Tinamidae) to habitat loss and fragmentation in northern Guatemala. Oryx 46:567–576
Tilman D, May RM, Lehman CL, Nowak MA (1994) Habitat destruction and the extinction debt. Nature 371:65–66
Tomasevic J, Estades CF (2006) Stand attributes and the abundance of secondary cavity-nesting birds in southern beech (Nothofagus) forests in south-central Chile. Ornitol Neotrop 17:1–14
Tomasevic J, Estades CF (2008) Effects of the structure of pine plantations on their ‘‘softness’’ as barriers for ground-dwelling forest birds in south-central Chile. Forest Ecol Manag 255:810–816
Vergara P, Simonetti J (2003) Forest fragmentation and rhinocryptid nest predation in central Chile. Acta Oecol 24:285–288
Wang X, Blanche FG, Koper N (2014) Measuring habitat fragmentation: an evaluation of landscape pattern metrics. Methods Ecol Evol 5(7):634–646
With KA, King AW (1999) Extinction thresholds for species in fractal landscapes. Conserv Biol 13:314–326
Witter AK, Berggren (2007) Natal dispersal in the North Island Robin (Petroica longipes): the importance of connectivity in fragmented habitats. Avian Conserv Ecol 2:2. http://www.ace-eco.org/vol2/iss2/art2/
Xeno-canto (2015) http://www.xeno-canto.org/species/Pteroptochos-castaneus. Accessed Jan 2015
Zaiden T, Marques FC, Medeiros HR, dos Anjos L (2015) Decadal persistence of frugivorous birds in tropical forest fragments of northern Parana. Biota Neotrop. https://doi.org/10.1590/1676-06032015008414
Zarri AA, Rahmani AR, Singh A, Kushwaha SPS (2008) Habitat suitability assessment for the endangered Nilgiri Laughingthrush: a multiple logistic regression approach. Curr Sci 94(11):1487–1494
Acknowledgements
This study was partially funded by a Fondecyt (1120314) grant to C.F. Estades. The School of Forest Science and Nature Conservation of the University of Chile provided important logistical support during the field work. Three anonymous reviewers made important observations on the first version of this work that helped us improve the quality of our study.
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Castillo, M.G., Jaime Hernández, H. & Estades, C.F. Effect of connectivity and habitat availability on the occurrence of the Chestnut-throated Huet-Huet (Pteroptochos castaneus, Rhinocryptidae) in fragmented landscapes of central Chile. Landscape Ecol 33, 1061–1068 (2018). https://doi.org/10.1007/s10980-018-0649-5
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DOI: https://doi.org/10.1007/s10980-018-0649-5