Seasonality regulates the structure and biogeochemical impact of ectomycorrhizal fungal communities across environmentally divergent neotropical dry forests

作者：Katilyn V. Beidler, Jennifer S. Powers, Juan Manuel Dupuy, Catherine M. Hulshof, David Medvigy, Camila Pizano, Beatriz Salgado‐Negret, Skip J. Van Bloem, German Vargas G., Bonnie G. Waring, Peter G. Kennedy · 发表于：Journal of Ecology · 年份：2023 · DOI：10.1111/1365-2745.14112 · 被引用次数：13 · 研究领域：Mycorrhizal Fungi and Plant Interactions、Forest Ecology and Biodiversity Studies、Ecology and Vegetation Dynamics Studies

Abstract Ectomycorrhizal (ECM) symbioses support forest functioning globally, yet both the structure and function of ECM fungal communities in seasonally dry neotropical forests (SDTFs), known for extreme heterogeneity in vegetation and edaphic properties, remain under characterized. Here, we evaluated the relative influences of seasonal versus spatial variation in ECM fungal community structure in soils from four environmentally divergent SDTFs. We also assessed the importance of biotic and abiotic drivers of SDTF ECM fungal community structure at regional scales, as well as ECM impacts on soil carbon (C) and nitrogen (N) cycling. ECM fungal frequency, relative abundance and richness all increased in the wet season, but spatial rather than seasonal effects explained more variation in community composition. Across the four SDTFs investigated, differences in tree communities drove ECM fungal community turnover more than geographic distances, site abiotic conditions or soil chemistry. Although soil moisture and ECM tree basal area were stronger predictors of soil biogeochemistry, incorporating ECM fungal community composition and relative abundance added explanatory power to models of soil C and N cycling in the wet season. Synthesis : Our results highlight the importance of seasonality and plant community composition in shaping different aspects of SDTF ECM fungal community structure and diversity as well as the potential for both the plant and fungal components of ECM symbios...