The influence of small hydroelectric power plants on the richness and composition of Odonata species in the brazilian savanna
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2018
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Resumo
Regardless of the economic and social development that damming processes related to hydroelectric
power plants bring to a region, they represent a wide range of disturbances to the physical, chemical,
and biological characteristics of rivers. We evaluated the effects of dams on Odonata communities from
the southeastern region of Goiás, Brazil. Thirteen streams connected to three dams were studied: seven
were used as reference samples (located upstream from the damming site, therefore not directly affected
by damming) and six were used as affected area samples (located downstream from the dam). A total
of 1128 odonates from six families, 22 genera, and 39 species were captured and identified. The results
showed that Odonata richness was affected by the presence of dams, with different effects on Anisoptera
and Zygoptera suborders. We discuss that these effects are related mostly to the physical and chemical
variables in waterbodies directly affected by small hydroelectric power plants (SHPs). It is possible that
negative effects on the Odonata community in SHP areas are related to changes in waterflow, pH and
turbidity.
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Anisoptera, Dragonfly, Zygoptera, Anthropogenic influences, River, Dams
Citação
KLEIN, C.E. et al. The influence of small hydroelectric power plants on the richness and composition of Odonata species in the brazilian savanna. International Journal of Odonatology, London, v. 21, n. 1, p. 33-44, 2018. DOI: 10.1080/13887890.2017.1419884. Disponível em: https://www.tandfonline.com/doi/abs/10.1080/13887890.2017.1419884. Acesso em: 25 jul. 2023.