Using Baetidae Species as Biological Indicators of Environmental Degradation in a Brazilian River Basin |
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Authors: | Daniel Forsin Buss Frederico Falcão Salles |
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Institution: | 1. Laboratório de Avalia??o e Promo??o da Saúde Ambiental, Departamento de Biologia, IOC, FIOCRUZ, Av. Brasil 4365 Manguinhos, Rio de Janeiro, RJ, Brazil, 21045-900 2. Departamento de Ciências da Saúde, Biologia e Agrárias, Centro Universitário Norte do Espirito Santo, Universidade Federal do Espirito Santo, R. Almeida Franklin, 257, Bairro Universitário, MG, Brazil
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Abstract: | The Ephemeroptera family Baetidae is one of the most specious families in the Neotropical region and a great effort to improve
the taxonomy of this group has been made over the last 10 years in South America. Such studies now enable the development
of biomonitoring tools at species-level in the region. A total of 2,199 baetids were collected from seven sampling sites,
collected three times (autumn, winter and summer), representing an environmental gradient, draining an area of Atlantic Forest
remnants. We describe the mesohabitat of nine Baetidae species and evaluate their responses to environmental degradation and
water chemistry by means of biological measures (richness and abundance) and multivariate analysis (Canonical Correspondence
Analysis), in order to assess their potential capacity as indicators of these impacts. Most species were found predominantly
associated with stony substrates, but some were associated with pool litter, and one species was found predominantly in riffle
litter substrate. Species distribution was influenced by the environmental gradient. Based on the CCA ordination, we were
able to identify which species were found in pristine versus the most impaired areas, therefore enabling us to establish the sensitivity of each species. |
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Keywords: | Baetidae Bioassessment Bioindicator Brazil Ephemeroptera |
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