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Thorax temperature and niche characteristics as predictors of abundance of Amazonian Odonata
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Thorax temperature and niche characteristics as predictors of abundance of Amazonian Odonata
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Journal Article
Thorax temperature and niche characteristics as predictors of abundance of Amazonian Odonata
2025
Overview
Environmental architecture and body temperature drive the distribution of ectothermic species, especially those with specific ecophysiological requirements or narrow ecological niches. In this study, we evaluated the connection between thorax temperature and niche specialization concerning the abundance and species contribution to the beta diversity of adult Odonata in Amazonian streams, employing the Species Contribution to Beta Diversity (SCBD). Our hypotheses were (i) Odonata species’ thorax temperature is positively correlated with both morphology (thorax width) and air temperature and differ between suborders. (ii) The thorax temperature of the Odonata assemblage serves as a more influential predictor than niche specialization in determining species abundance and SCBD. We sampled 46 streams in an anthropized landscape in the Northeastern and Southeastern regions of Pará state, Brazil. Notably, niche breadth emerged as the variable influencing the abundance and SCBD of the Odonata assemblage. Niche position is negatively related with abundance only for Zygoptera. Anisoptera exhibited a negative relationship between abundance and thoracic temperature. On the other hand, Zygoptera had positive relationship between abundance and thoracic temperature. In summary, our results underscore the necessity of considering both niche and ecophysiological predictors to comprehensively assess the Odonata assemblage in Amazonian streams. This holistic approach has implications for conservation efforts and bioassessment practices, offering valuable insights into the collective response of Odonata as a group.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Animals
/ Body Temperature - physiology
/ Brazil
/ Chest
/ Ecology and Environmental Sciences
/ Habitats
/ Heat
/ Males
/ Medicine and Health Sciences
/ Odonata
/ Rivers
/ Species
/ Thorax
