Diversidade de libélulas em lagoas antrópicas: efeitos de área, isolamento e qualidade de hábitat
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2014-06-16
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Universidade Federal de Goiás
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Anthropic systems seems to be less interesting for biodiversity conservation when compared to natural environments. Especially in tropical anthropic systems, there is a lack of knowledge about the drivers of species richness. Thus, we tested hypotheses of pond area, isolation and habitat quality that predict odonates (and separated suborders) species richness in farmland water bodies. We hypothesized that suborders will respond differently given of their distinct skills on landscape perception. We expected that landscape features would cause a smaller influence for the Anisoptera than the Zygoptera given their higher dispersion ability and less-demanding habitat requirements. We studied species richness of Odonata and suborders (Anisoptera and Zygoptera) at 53 ponds in an agricultural landscape in the Brazilian Cerrado. We used linear regressions and we selected the best models accordingly AICc and Akaike weights. As expected, there were different relations between odonates suborders and landscape features. Among all predictors, habitat quality was the main species richness driver. Despite our expectations, habitat quality was more related with Anisoptera than Zygoptera, which in turn was best related with pond area. Isolation was related in both suborders. Our results support the view that the differences between Odonata’s suborders reflect in how they perceive the landscape and that mechanisms such habitat selection can have great influence in species distributions and community dynamics.
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CORRÊA, C. C. Diversidade de libélulas em lagoas antrópicas: efeitos de área, isolamento e qualidade de hábitat. 2014. 47 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2014.