Biodiversity shortcuts in biomonitoring of novel ecosystems
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2017
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Resumo
Hydropower reservoirs are novel ecosystems that present different challenges for the design of biomonitoring
programs. To ensure long-term programs and wide spatial coverage, it is important to test the reliability of
different cost-saving strategies that have been widely evaluated among researchers, such as taxonomic sufficiency,
numerical sufficiency and surrogate groups. Using data on zooplankton composition, our objective was to
test whether these strategies could be applied to increase the efficiency of biomonitoring programs in reservoirs.
Zooplankton data were collected at the Santo Antônio do Jari Hydroelectric Plant, which is located between the
states of Pará and Amapá (Amazon region, Brazil), over 23 months between 2012 and 2015. The data were
organized in different taxonomic groups (cladocerans, copepods, rotifers and testate amoebae) and matrices by
decreasing the taxonomic resolution (from species to genera and families) and the numerical resolution (from
species abundance to species presence/absence) of the data. The ordination patterns obtained with Principal
Coordinate Analysis for the different matrices were compared using Procrustes analyses. Our results suggest that
ordination patterns using genus-level data were similar to those obtained with species-level data. However,
analyses based on family-level data were often unable to reproduce results based on species-level data.
Ordination patterns using presence/absence data were similar to those obtained from abundance data. We also
found that the strengths of the relationships between ordinations derived from different taxonomic groups (e.g.,
rotifers and cladocerans) were low and often not significant. We conclude that the use of zooplankton genera and
presence/absence data may be a reliable strategy to monitor reservoirs. However, our results highlight the need
to monitor different zooplankton groups, as the ordination patterns depicted by a given group were poorly
related to those generated by a second zooplankton group.
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Jari river Amazon, Numerical resolution, Reservoir, Taxonomic sufficiency, Taxonomic resolution, Cross-taxon congruence
Citação
VIEIRA, Maisa Carvalho et al. Biodiversity shortcuts in biomonitoring of novel ecosystems. Ecological Indicators, Oxford, v. 82, p. 505-512, 2017. DOI: 10.1016/j.ecolind.2017.07.025. Disponível em: https://www-sciencedirect.ez49.periodicos.capes.gov.br/search?pub=Ecological%20Indicators&cid=272241&qs=Biodiversity%20shortcuts%20in%20biomonitoring%20of%20novel%20ecosystems. Acesso em: 10 jan. 2023.