Zooplankton taxonomic and functional structure is determined by macrophytes and fish predation in a Neotropical river

Habitat structure and predation are major factors that influence the distribution of zooplankton species and functional traits. Here, we analyzed how the structure provided by macrophytes (richness, Shannon’s diversity, and biomass) and potential predation by small-bodied fishes (richness and abunda...

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Bibliographic Details
Published in:Hydrobiologia 2021-04, Vol.848 (7), p.1475-1490
Main Authors: Deosti, Sabrina, de Fátima Bomfim, Francieli, Lansac-Tôha, Fernando Miranda, Quirino, Bárbara Angélio, Bonecker, Claudia Costa, Lansac-Tôha, Fábio Amodêo
Format: Article
Language:English
Subjects:
Abundance
Analysis
Aquatic habitats
Aquatic plants
Biological diversity
Biomass
Biomedical and Life Sciences
Body size
Distribution
Ecology
Fish
Fishes
Freshwater & Marine Ecology
Geographical distribution
Habitats
Interspecific relationships
Life Sciences
Life span
Macrophytes
Multivariate statistical analysis
Predation
Predation (Biology)
Primary Research Paper
Regression analysis
Regression models
Species
Species diversity
Taxonomy
Zoology
Zooplankton
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Summary:Habitat structure and predation are major factors that influence the distribution of zooplankton species and functional traits. Here, we analyzed how the structure provided by macrophytes (richness, Shannon’s diversity, and biomass) and potential predation by small-bodied fishes (richness and abundance) determine the richness of species and functional traits of zooplankton, as well as the spatial dissimilarity (beta-diversity) of species and traits. Zooplankton, fish, and macrophytes were simultaneously sampled across a gradient of 30 multi-species macrophyte beds. We assessed spatial patterns of zooplankton under taxonomic and functional approaches, using linear regression models, Generalized Dissimilarity Models, a Structural Equation Model, and a Fourth-Corner Analysis. Zooplankton taxonomic beta-diversity was most represented by the turnover component and zooplankton functional beta-diversity by nestedness. Zooplankton taxonomic richness and taxonomic beta-diversity were positively related to macrophyte biomass, richness, and Shannon’s diversity, whereas zooplankton functional richness and functional beta-diversity were positively related to fish richness and abundance. Macrophyte biomass and diversity oppositely influenced fish structure, which had influence on zooplankton structure. Macrophytes also negatively influenced the zooplankton traits such as body size, reproduction type, habitat, lifespan, and predatory escape response and positively influenced the trait feeding type. Fish were negatively related to the trait body size. The spatial structure generated by macrophyte beds and fish community determined the distribution of zooplankton species and functional traits.
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-021-04527-8