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Grassland afforestation with Eucalyptus affect Collembola communities and soil functions in southern Brazil

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Abstract

Afforestation of subtropical grasslands increased during the last decade and their impacts on soil biota and functions are not well known. Here we investigated the effects of grassland afforestation with Eucalyptus on soil Collembola communities in southern Brazil. By using paired transects (native grassland vs. plantation), we assessed Collembola taxonomic and functional composition and diversity and their relations with plant diversity and soil microbial and physical–chemical parameters. Eucalyptus plantations significantly decreased plant richness, soil pH, and soil temperature. Microbial biomass, soil basal respiration and enzyme activities were negatively affected by grassland afforestation, which may indicate an effect on decomposition, soil fertility, and carbon stock. At a regional scale, grassland afforestation diminished the richness, and at a local scale changed the taxonomic and functional composition of Collembola communities. An environmental filtering mechanism is suggested triggering trait turnover from open (grassland) to a closed canopy habitat (tree plantation). While grassland presented high abundance of larger, eyed, and pigmented Collembola, Eucalyptus favored smaller, blind, and non-pigmented Collembola with shadow-adapted sensorial structures. Our results on afforestation effects in subtropical grasslands are similar to those described for temperate zone, and may underpin the development of conservation strategies for land-use on subtropical grasslands.

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Acknowledgements

We thank Rômulo Vitória, Mariana Vieira and Jéssica Maciel for field and lab assistance. This study was financially supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brazil by a master’s scholarship given to B.C.S.J., and research funding to V.P. (Nexus MCTI/CNPq grant 441280/2017-0).

Funding

This study was financially supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico CNPq, Brazil by a master’s scholarship given to B.C.S.J., and research funding to V.P. (Nexus MCTI/CNPq Grant 441280/2017-0).

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BCSJ, LRP and BRW conceived the ideas regarding soil biodiversity and functions; VDP, BRW and LRP conceived the general questions and sampling design of the Nexus project; BCSJ was responsible for the field and laboratory work under supervision of LRP and BRW; BCB revised Collembola taxonomical identification and functional traits LSM was responsible for the vegetation data BCSJ and LRP analyzed the data BCSJ led the writing of the manuscript All authors reviewed the manuscript and gave final approval for publication.

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Correspondence to Bruna Claudia S. Jorge.

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The authors have no competing interests that might be perceived to influence the results and/or discussion reported in this paper.

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Communicated by Pedro Eisenlohr.

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Jorge, B.C.S., Winck, B.R., da Silva Menezes, L. et al. Grassland afforestation with Eucalyptus affect Collembola communities and soil functions in southern Brazil. Biodivers Conserv 32, 275–295 (2023). https://doi.org/10.1007/s10531-022-02501-x

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  • DOI: https://doi.org/10.1007/s10531-022-02501-x

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