Reducing the deleterious effects of logging on Ephemeroptera communities through reduced impact management
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Reduced impact logging has emerged as one alternative to reduce the effects of timber harvesting. However, the effects of this method on aquatic ecosystems still need to be tested. We studied the effects of logging (reduced-impact logging—RIL and conventional logging methods—CL) on the chemical water quality and physical habitat conditions of streams in eastern Amazonia, as well as on Ephemeroptera diversity. Were analyzed control streams (without logging—CONTROL), streams with RIL and streams with CL, located in the Capim River Basin. Specimens were collected using a dipnet, following a standard protocol and abiotic data were measured with a multiparameter probe. Conventional logging in proximity to streams increased the conductivity and pH of the water, reduced dissolved oxygen and canopy cover of the stream’s channel, altering the composition of Ephemeroptera when compared with CONTROL and RIL areas. We verified that specialist Ephemeroptera species within control environments were replaced by species more tolerant to changes in the natural habitat conditions. In contrast, there was species similarity between RIL and CONTROL streams.
KeywordsDeforestation Stream ecology Conservation Amazon forest Benthic macroinvertebrate
We would like to thank 33 Forest and CIKEL LTDA and Instituto de Florestas Tropicais (IFT) for their logistical support. The Conselho Nacional de Desenvolvimento Científico e Tecnológico for financing the project entitled “Tempo de resiliência das comunidades aquáticas após o corte seletivo de madeira na Amazônia Oriental” by Universal notice 14/2011, process 481015/2011-6 and for the productivity grant to LFAM (process: 305017/2016-0) and LJ (process: 307597/2016-4). LFAM was funded by the Cooordenação de Aperfeiçoamento de Pessoal do Nível Superior (CAPES) (process 88881.119097/2016-01). We would also like to thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior for the Master’s scholarship to MC and the Doctorate scholarship to LBC.
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