Concordance among zooplankton groups in a near-pristine floodplain system
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2015
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The search for biological surrogate groups has been an active and contentious area of research. A surrogate
group is defined as one that allows researchers to detect a known spatial and temporal environmental
gradient and to represent the responses of other biological groups to those gradients. Using spatiotem-
poral zooplankton data from a near-pristine floodplain (the Araguaia River floodplain in Central Brazil),
we first assessed the capacity of four zooplankton assemblages (Cladocera, Copepoda, Rotifera and Pro-
tozoa) to depict the effects of flooding. Second, we evaluated whether, during each hydrological period,
ordination patterns derived from an assemblage matched those patterns shown by a second assemblage
and by the environmental dataset. All four assemblages satisfactorily detected the environmental differ-
ences caused by the flood event. Most pairs of assemblages were significantly concordant. Additionally,
the ordination patterns generated by these assemblages matched those generated by the environmental
data. These results suggest that the patterns of concordance were mediated by similar responses to envi-
ronmental gradients. However, the strengths of concordance between the assemblages, albeit significant,
were low. Our results suggest the potential for use of the surrogacy approach in monitoring hydrolog-
ical changes. However, due to the low strengths of concordance, the biodiversity pattern revealed by a
specific assemblage is unlikely to be a good predictor of another. We also highlighted that conducting a
formal meta-analysis on strengths of concordance between assemblages would be a promising avenue
for further research.
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Flooding, Araguaia River, Biomonitoring, Concordance, Biological surrogates
Citação
VIEIRA, L. C. G.; PADIAL, A. A.; VELHO, L. F. M.; CARVALHO, P.; BINI, L. M. Concordance among zooplankton groups in a near-pristine floodplain system. Ecological Indicators, Oxford, v. 58, p. 374-381, 2015. DOI: 10.1016/j.ecolind.2015.05.049. Disponível em: https://www.sciencedirect.com/science/article/pii/S1470160X1500309X. Acesso em: 05 abr. 2023.