1. Evidence indicating that ecological communities show delayed responses to environmental change has raised the need to better understand the effects of landscape history on biodiversity. 2. We investigated how freshwater biodiversity is related to both recent and past land use change in tropical river catchments. More specifically, we analysed the relationship between biodiversity and change in forest cover that occurred across five decades, including landscape trajectories of forest gain and loss. Past Recent Current Landscape change Effect size on current community diversity Extinction debt Species credit Forest proportion (mean) across time Species richness Recent forest gain Recent forest loss Stable forest remnant (a) (b) | 2151 Journal of Applied Ecology SANTOS eT Al.
Trait-environment relationships are weaker than taxon-environment relationships 2-Traits are interrelated and do not respond monotonically to environmental changes 3-Species with different suite of traits can respond similarly to the environment 4-Taxonomic composition is more related to spatial variables than trait composition 5-Statistical developments are still needed to improve trait-environment analyses.
Leptophlebiidae is the family with the most diversity of species and wide distribution in the Southern Hemisphere. There are 95 species of Leptophlebiidae recorded in Brazil, but for the state of Bahia there are only 21 species. A check list and new records of Leptophlebiidae (Ephemeroptera) are presented to the State of Bahia. A total of 16 genera and 40 species of Leptophlebiidae were identified on this study. The species Fittkaulus cururuensis, Hylister obliquus, Miroculis (atroari) duckensis and Miroculis (Ommaethus) froehlichi are reported for the first time to the State of Bahia, increasing the number of Leptophlebiidae species from 21 to 25. Now, the Bahia is one of the states with the largest number of Leptophlebiidae species records, behind only of the state of Espírito Santo which has 26 species of this family.
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