Cover Image

Secondary productivity of main microcrustacean species of two tropical reservoirs in Brazil and its relationship with trophic state

Sofia L. Brito, Paulina M. Maia-Barbosa, Ricardo M. Pinto-Coelho
  • Sofia L. Brito
    Programa de Pós-Graduação em Ecologia, Conservação e Manejo de Vida Silvestre - ECMVS, Brazil | sofialuizabrito@gmail.com
  • Paulina M. Maia-Barbosa
    Universidade Federal de Minas Gerais, Brazil
  • Ricardo M. Pinto-Coelho
    Universidade Federal de Minas Gerais, Brazil

Abstract

In view of the importance of the zooplankton community in energy transfer between trophic levels, this study had as objective to estimate the secondary productivity rates of the main microcrustacean in two large tropical reservoirs, Três Marias and Furnas, state of Minas Gerais, Brazil. We included Thermocyclops minutus, Bosminopsis deitersi, Bosmina hagmanni, Ceriodaphnia cornuta and Moina minuta in Três Marias Reservoir, and, in Furnas, these species and also Notodiaptomus henseni, Daphnia ambigua, Ceriodaphnia silvestrii, Diaphanosoma spinulosum, D. fluviatile and Bosmina freyi. With respect to total productivity, higher rates were obtained in the rainy period in both reservoirs (P<0.000), with mean values during the dry and rainy periods of 0.44 and 1.80 mg DW m-3 d-1 for Três Marias Reservoir and 1.50 and 3.10 mg DW m-3 d-1 for Furnas Reservoir, respectively. Thermocyclops minutus was the most important species in terms of density and biomass in Três Marias Reservoir, and M. minuta showed the highest rates of secondary productivity, especially during the rainy period. In Furnas, N. henseni and D. ambigua showed the highest productivity rates in both periods, and C. silvestrii, C. cornuta, D. spinulosum and D. fluviatile were also important during the rainy period. Values of the productivity:biomass ratio were usually lower for the copepods; the cladoceran M. minuta showed the highest values in both reservoirs. The higher microcrustacean secondary productivity rates in Furnas Reservoir are probably the result of greater efficiency in energy transfer between trophic levels, due to the presence of phytoplankton species with better nutritional quality in this environment.

Keywords

Secondary productivity; microcrustacean; tropical reservoirs; trophic state.

Supporting Agencies

SEAP/SECTES/FUNDEP-UFMG - Agreement 8713; CNPq grant process 142079/2006-5

Full Text

PDF
HTML
Submitted: 2015-05-23 00:49:28
Published: 2016-02-04 00:00:00
Search for citations in Google Scholar
Related articles: Google Scholar
Abstract views:
2664

Views:
PDF
971
HTML
1009

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM


Copyright (c) 2016 Sofia L. Brito, Paulina M. Maia-Barbosa, Ricardo M. Pinto-Coelho

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
 
© PAGEPress 2008-2017     -     PAGEPress is a registered trademark property of PAGEPress srl, Italy.     -     VAT: IT02125780185