Abstract
Matter and energy fluxes and ecosystem services in streams rely on fungi associated with leaf litter. However, the species diversity of this microbial group may differ between a protected area and its surroundings. Thus, to understand how beta diversity may depend on the conservation status of an area, we aimed to evaluate the structure and diversity (α, β, and γ) of the aquatic fungal community from a subtropical area and how it is distributed in streams from a protected area and from a farmland area. Hence, we compared eight streams inside with eight streams outside of a protected area. This is one of the first studies testing the biotic homogenisation hypothesis for fungi associated with leaf litter in streams. We found new records of fungal species from a global biodiversity hotspot. The gamma diversity of aquatic fungi was surprisingly high. Our analyses indicated a process of environmental homogenisation of streams outside the national park. Intriguingly, neither α nor β diversity differed between areas. Environmental variables presented large differences, especially regarding nutrients, which influence the aquatic fungal community. Altogether, this national park seems to be effective in protecting the environmental heterogeneity of streams to some extent; however, the national park was likely suffering from pollution, which requires further investigation.
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Data availability
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors thank the Ecological Energetics Laboratory, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (NUPELIA), Universidade Estadual de Ponta Grossa (UEPG), Universidade Tecnológica Federal do Paraná (UTFPR), Campos Gerais National Park, Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio), Regiane Silva, Edivando Vitor do Couto, and Rachel Calil de Oliveira.
Funding
This work was supported by the Fundação Araucária de Apoio ao Desenvolvimento Científico e Tecnológico do Estado do Paraná (FA) and Fundação Grupo Boticário de Proteção à Natureza (FGB) [grant number 45751 002/2016], the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) [141691/2020-4 to M.M.R.S., 152643/2016-8 to G.D.P, and 308522/2021-4 to E.B.], and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) [1614297 and 88881.690087/2022-01 to M.M.R.S.].
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All authors contributed to the study conception and design. Material preparation and data collection were performed by Matheus Maximilian Ratz Scoarize, Gisele Daiane Pinha, and Laryssa Helena Ribeiro Pazianoto. Analysis was performed by Matheus Maximilian Ratz Scoarize and Gisele Daiane Pinha. The first draft of the manuscript was written by Matheus Maximilian Ratz Scoarize, and all authors commented on previous versions of the manuscript. Funding acquisition was performed by Evanilde Benedito. All authors read and approved the final manuscript.
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Scoarize, M.M.R., Pinha, G.D., Pazianoto, L.H.R. et al. Stream environmental conditions are homogenised outside a protected area, but fungal beta diversity remains unchanged. Mycol Progress 23, 12 (2024). https://doi.org/10.1007/s11557-024-01952-6
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DOI: https://doi.org/10.1007/s11557-024-01952-6