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Zooplankton functional diversity in subtropical reservoirs of distinct trophic states (São Paulo state, Brazil)

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Abstract

Studies on functional traits of aquatic communities are useful for understanding the ecosystem dynamics as well as the diversity of ecological niches. Here, we characterize zooplankton functional groups and which limnological factors are responsible to changes in traits. Water samples were collected to evaluate limnological parameters and vertical hauls with plankton net (68 μm) were performed to characterize the community in seven reservoirs (Itupararanga, Atibainha, Salto Grande, Rio Grande, Igaratá, Barra Bonita, and Broa, São Paulo state, Brazil). Each species identified was classified according to a trophic group, reproduction mode, body length, habitat, and feeding habitats. Our results showed a predominance of pelagic suspensory herbivores with cilia (31%) followed by pelagic herbivore suspension filter feeders (17%) and raptorial omnivores (15.38%). The other individuals were categorized as pelagic herbivore suspension with oral device (12.3%), littoral herbivores suspensive with cilia (12.3%), pelagic-sucking herbivores (9.2%), and littoral grazing herbivores (3%). The dominance of herbivores may be influenced by the availability of nutrients, influencing their food sources. The abundance of omnivores engaged in predatory behavior can be attributed to disponible prey, thereby exerting significant repercussions on the organization of biological communities.

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Funding

Financial support for this work was provided by FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo, grant no. 2016/17266, 2019/10845–4, 2021/10637–2 and 2021/11283–0), CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, grant no. 88887758536/2022–00) and UNESP Postdoctoral Program (PROPE-ICTS).

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Bruno Paes De-Carli: conceptualization, methodology, formal analysis, data curation, software, investigation, visualization, writing—original draft preparation and editing.

Sheila Cardoso-Silva: data curation, visualization, writing—review and editing.

Agatha Manzi: formal analysis, investigation, visualization, writing—original draft preparation and editing.

Viviane Moschini-Carlos: visualization, writing—review and editing, supervision and fund acquisition.

Marcelo Pompêo: conceptualization, data collection, formal analysis, visualization, writing—review and editing, supervision and fund acquisition.

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Correspondence to Bruno Paes De-Carli.

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The authors declare no competing interests.

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De-Carli, B.P., Cardoso-Silva, S., Manzi, A. et al. Zooplankton functional diversity in subtropical reservoirs of distinct trophic states (São Paulo state, Brazil). Environ Sci Pollut Res 31, 35779–35788 (2024). https://doi.org/10.1007/s11356-024-33621-2

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  • DOI: https://doi.org/10.1007/s11356-024-33621-2

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