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Effects of an atypical drought on the benthic macroinvertebrate community in a tropical reservoir Biota Neotropica
Anacléto,Maria José Pinheiro; Ligeiro,Raphael; Barbosa,José Etham de Lucena; Molozzi,Joseline; Callisto,Marcos.
Abstract Atypical drought events have increasingly occurred in Brazil over the last years due to global climate changes. However, their consequences on aquatic biota in reservoirs are poorly known. We tested the hypothesis that macroinvertebrate communities are negatively affected by atypical drought events, given the sensitivity of many taxa to environmental changes. We predicted that: (a) there would be changes in limnological and sediment parameters between a regular year and an atypical year, (b) abundance and richness of the genera of Chironomidae and of exotic species would be higher due to the enhanced ability of these organisms to adapt to changes in the physical environment, and (c) community structure metrics (i. richness; ii. % richness; iii....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthic fauna; Exotic species; Ecological integrity; Water stress; Climate changes.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000200205
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Effect of introduced species and habitat alteration on the occurrence and distribution of euryhaline fishes in fresh- and brackish-water habitats on Aruba, Bonaire and Curaçao (South Caribbean) Naturalis
Hulsman, H.; Vonk, R.; Aliabadian, M.; Debrot, A.O.; Nijman, V..
We conducted an ichthyological survey during the dry season of 2006 on the semi-arid islands of Aruba, Bonaire and Curaçao to provide information on species composition, richness and distribution in natural and non-natural aquatic habitats. The dry season species assemblages (N = 9 species) comprised less species than the wet seasons, and these data refine our knowledge of the indigenous fish fauna and its refuge localities during phases of drought and ensuing high salinity. A hierarchical cluster analysis reveals that the three islands have different species compositions with Curaçao being the most diverse, probably due to its having the most habitats and freshwaters present throughout the year. Species richness was unrelated to salinity and species...
Tipo: Article / Letter to the editor Palavras-chave: Fish assemblages; Semi-arid islands; Intermittent rivers; Aquatic refugia; Ecological integrity; 42.81.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/269647
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