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How Habitat Filtering Can Affect Taxonomic and Functional Composition of Aquatic Insect Communities in Small
G Nicacio1, E J Cunha2, N Hamada3
1Pós-Graduação em Zoologia, Instituto de Ciências Biológicas, Univ Federal do Pará, Rua Augusto Correia, Bairro Guamá, Belém, Pará, Brasil. gilnicacio@gmail.com.
Neotropical Entomology
|May 23, 2020
Summary
Local stream habitat conditions regulate aquatic insect community structure and functional traits. Environmental filtering shapes species traits, influencing community composition across various habitat conditions in Amazonian streams.
Area of Science:
- Ecology
- Environmental Science
- Aquatic Biology
Background:
- Understanding how local environmental factors influence aquatic insect communities is crucial for effective conservation and management.
- The relationship between taxonomic and functional composition in response to environmental variables across multiple scales remains incompletely understood.
Purpose of the Study:
- To analyze the responses of taxonomic and functional community composition to local environmental factors in small Amazonian streams.
- To investigate the correlation between taxonomic and functional composition and their responses to environmental variables at different spatial scales.
Main Methods:
- Redundancy analysis (RDA) and RLQ analysis were used to assess the response of community abundance to environmental variables and traits.
- Fourth-corner analysis was applied to identify specific interactions between environmental variables and species traits.
- Community composition was modeled across multiple habitat scales, including riparian/channel, substrates, and water variables.
Main Results:
- Local stream habitat conditions, such as riparian cover, channel morphology, and substrate characteristics, were found to regulate community structure and functional composition.
- Associations were observed between trait composition and environmental variables, including riparian cover, channel morphology, and substrate size/composition.
- Unexpectedly, no specific associations were found between unique environmental variables and traits.
Conclusions:
- Local environmental filtering strongly influences the functional trait composition and overall community structure of aquatic insects.
- Species traits adapted to a range of habitat conditions are key to understanding community composition.
- Despite a limited sample size, the study provides valuable insights into the simultaneous variation in functional and community composition.
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