Biological surrogates: a word of caution
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2018
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Resumo
The value of biological surrogates has been tested for many ecosystems and biological groups. Biological surrogates are biological groups whose biodiversity patterns (e.g. abundance, species richness or assemblage
composition) correlate strongly with those of other biological groups. They should thus be cost-effective proxies
for overall diversity variation in biodiversity assessment and biomonitoring projects. We assessed whether the
available evidence support the use of surrogate groups in biodiversity assessment and biomonitoring studies
considering aquatic and terrestrial ecosystems. To achieve this goal, we carried out a meta-analysis of studies
testing the strength of different surrogacy approaches (relationship between species richness, ordination patterns
and compositional (dis)similarity matrices of different biological groups). The strengths of relationships between
species richness of biological groups were higher for plants and microorganisms than for animals, were similar
for terrestrial and aquatic ecosystems and for different types of data. The variation in the strength of relationships between compositional dissimilarity matrices was not explained by the explanatory variables ‘taxa’,
‘realms’ or ‘types of data’. However, as main results, we found that the weighted effect sizes, measuring the value
of surrogates, were low, highly variable and mostly unpredictable (at least considering our explanatory variables). Therefore, the available evidence suggests caution in the use of surrogate groups and that biodiversity
assessment and biomonitoring programs should be based on multiple taxonomic groups, whenever possible.
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Biodiversity assessment, Biomonitoring, Concordance among biological groups, Surrogate group, Meta-analysis, Systematic review
Citação
MORAIS, Gustavo Filete de; RIBAS, Luiz Guilherme dos Santos; ORTEGA, Jean Carlo Gonçalves; HEINO, Jani; BINI, Luis Mauricio. Biological surrogates: a word of caution. Ecological Indicators, Oxford, v. 88, p. 214-218, 2018. Disponível em: https://www-sciencedirect.ez49.periodicos.capes.gov.br/search?qs=Biological%20surrogates%3A%20a%20word%20of%20caution&pub=Ecological%20Indicators&cid=272241. Acesso em: 9 jan. 2023.