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Effectiveness of higher-taxon approach on ants and sample size effect: an assessment in Brazilian biomes and states

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Abstract

The effect of human activities on the suppression of biodiversity is visibly evident throughout the world. Monitoring and conservation services are usually expensive in terms of time and money, and potential savings in these areas are always welcome. The higher-taxon approach has been used as a possible alternative to overcome these impediments. However, there is little information about the effect of sample size on the effectiveness of the higher-taxon approach, mainly with empirical data. Using an extensive database, which compiles information on the distribution of ants between the years 1886 and 2020, I verified the effect of sample size on the predictive power of the higher-taxon approach in Brazil. I evaluated the effect of sample size on the predictive power of the Genus and Subfamily to represent species richness and composition at the spatial scales of State and Biomes. The associations between coarser taxonomic units and species-level are strong at both spatial scales, with metrics of richness and composition. In general, the genus has the results with the highest coefficients regardless of spatial scales. The sample size effect was sporadic and did not dramatically affect the effectiveness of the surrogates. Regardless of the possible biases that data compiled from the literature and taxonomic collections may have due to lack of standardization, coarser taxonomic units (Genus and Subfamily) were efficient predictors of species-level in Brazilian states and biomes. It reinforces the potential to save costs in monitoring and conserving ant biodiversity in a wide space-environmental gradient.

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Acknowledgements

This study was supported by the National Council for Scientific and Technological Development (CNPq, Programa de Capacitação Institucional—PCI/INMA) of the Brazilian Ministry of Science, Technology and Innovation (MCTI). I thank the coordination and the members of the sub-project Conservation of Biodiversity in the Central Atlantic Forest (PCI-1) for their unconditional support in the elaboration of this manuscript. Thanks also to Ana C. Loss for her help in extracting geographic data from the rasters using R. I was supported by a CNPq PCI/INMA (300886/2022-5) post-doctoral scholarship.

Funding

The funding was provided by Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq PCI/INMA (Grant No. 302065/2021-0).

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Contributions

JLPS defined the conception and design of the study. JLPS prepared the material and analyzed the data. JLPS wrote the first version of the manuscript and prepared the figures and tables present in the current version of this manuscript.

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Correspondence to Jorge Luiz Pereira Souza.

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The author declare that no competing interests as defined by Springer, or other interests that might be perceived to influence the results and/or discussion reported in this paper.

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Communicated by Akihiro Nakamura.

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Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (PDF 886 KB)—Online Resource 1. Distribution of ant species sampling points (n=1755) in Brazil.

10531_2022_2516_MOESM2_ESM.xlsx

Supplementary file2 (XLSX 12 KB)—Online Resource 2. Values of Species (added to the morphospecies), Genus and Subfamily richness; regression coefficients of richness and composition and the species:higher-taxon ratio for the states and biomes spatial scales tested in Brazil.

10531_2022_2516_MOESM3_ESM.pdf

Supplementary file3 (PDF 19 KB)—Online Resource 3. Regression between the sample size and numbers of Species, Genera and Subfamilies of ants for States and Biomes grains of the spatial scale in the Brazil. The regressions were significant at P < 0.01.

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Souza, J.L.P. Effectiveness of higher-taxon approach on ants and sample size effect: an assessment in Brazilian biomes and states. Biodivers Conserv 32, 635–652 (2023). https://doi.org/10.1007/s10531-022-02516-4

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  • DOI: https://doi.org/10.1007/s10531-022-02516-4

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