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Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates
Published on: January 13, 2023
Zooplankton community in the Upper Parnaíba River (Northeastern, Brazil)
P H S Picapedra1, C Fernandes2, F A Lansac-Tôha1,3
1Programa de Pós-graduação em Biologia Comparada, Universidade Estadual de Maringá - UEM, Avenida Colombo, 5790, CEP 87020-900, Maringá, PR, Brazil.
Abstract:
The objective of the present work is to evaluate the seasonal patterns of species richness and abundance of the zooplankton community in a semi-arid river, Northeastern of Brazil. Zooplankton samples were taken in four hydrological periods along the Upper Parnaíba River: April (low), August (dry), November (rising) 2013 and January (flood) 2014. The zooplankton community consisted of 125 species; the testate amoebae was the most species-rich (56 species) and the most abundant group (71.5%) of total zooplankton abundance. Season-specific differences were highly significant. The overall zooplankton richness and abundance was significantly higher during the low (71 species) and flood (878.47 ind.m-3) period, respectively. The hydrological regime was important in structuring the zooplankton community, emphasising the importance of the Parnaíba River and its seasonal variation for biodiversity conservation in the Brazilian semi-arid region.
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