ARBUSCULAR MYCORRHIZAL FUNGI IN THE CERRADO BIOME: EFFECTS OF LAND USE SYSTEM, SOIL TEXTURE, AND SEASONALITY

Authors

  • Andréia Marcilane Aker Department Academic of Social and Environmental Sciences, Universidade Federal de Rondônia, Guajará Mirim, RO https://orcid.org/0000-0001-5745-8723
  • Ana Lucy Caproni Department Academic of Social and Environmental Sciences, Universidade Federal de Rondônia, Guajará Mirim, RO https://orcid.org/0000-0002-7795-3075
  • Ricardo Luiz Louro Berbara Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ https://orcid.org/0000-0002-9133-7754
  • José Rodolfo Dantas de Oliveira Granha Department Academic of Social and Environmental Sciences, Universidade Federal de Rondônia, Guajará Mirim, RO https://orcid.org/0000-0002-1007-3997
  • Cristiane Figueira da Silva Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ https://orcid.org/0000-0003-4606-3149
  • Marcos Gervásio Pereira Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ https://orcid.org/0000-0002-1402-3612

DOI:

https://doi.org/10.1590/1983-21252022v35n117rc

Keywords:

Agroecosystems. Diversity of species. Diversity indexes.

Abstract

The objective of this study was to identify communities of arbuscular mycorrhizal fungi (AMF) in soils under pasture, silvopasture, and Cerrado forest ecosystems, and evaluate the effects of land use system, soil texture, and seasonality on the dynamics of AMF communities, in Alta Floresta D'Oeste, Rondônia, Brazil. Samples of the soil 0-20 cm layer were randomly collected in each ecosystem in July, 2010 (dry season) and January, 2011 (rainy season). Spores were extracted, counted, and identified. The spore density and density of each species of AMF were estimated. The frequency of occurrence, Shannon diversity index, and Simpson diversity index were calculated for each species. Multivariate clustering analysis was carried out, considering the number of AMF of each species. The results showed a trend of higher number of spores in the Cerrado forest ecosystem, regardless of the soil texture or season, when compared to pasture and silvopasture areas. The Glomus macrocarpum species presented 100% frequency of occurrence in the rainy season in both soil textures. The effects of texture and seasonality on the composition and diversity of AMF communities was more expressive in the Cerrado forest ecosystem. The climate, soil texture, and land use and management affected the composition and diversity of AMF species.

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References

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Published

22-12-2021

Issue

Section

Forest Science