Scale‐Dependent Effects of Plant Diversity Drivers Across Different Grassland Habitats in Ukraine

作者：Oksana Y. Buzhdygan, Selina Baldauf, Dariia Borovyk, Denys Vynokurov, Emma Ladouceur, Olha Chusova, Svitlana Iemelianova, Vasyl Budzhak, Britta Tietjen, O. Bezrodnova, Olesya Bezsmertna, Illia Chorney, Iwona Dembicz, Jürgen Dengler, Yakiv Didukh, Monika Janišová, Alexander Khodosovtsev, O.O. Kucher, Ivan Moysiyenko, Alla Tokaryuk, Iuliia Vasheniak, Olena Yavorska, Jonathan M. Chase, Анна Куземко · 发表于：Ecology and Evolution · 年份：2025 · DOI：10.1002/ece3.70941 · 被引用次数：2 · 研究领域：Ecology and Vegetation Dynamics Studies、Plant and animal studies、Species Distribution and Climate Change

ABSTRACT Understanding the factors governing grassland biodiversity across different spatial scales is crucial for effective conservation and management. However, most studies focus on single grain sizes, leaving the scale‐dependent mechanisms of biodiversity drivers unclear. We investigated how climate, soil properties, abiotic disturbance, and land use influence plant diversity across two fine spatial scales in various grassland types in Ukraine. Using spatially explicit data on plant species presence and their cover, collected at smaller (10 m 2 ) and larger (100 m 2 ) grain sizes, we assessed spatial β ‐diversity—the variability of biodiversity between scales. We analyzed whether the effects of ecological drivers on β ‐diversity are mediated by changes in species evenness, density (total cover), and intraspecific aggregation in plant community. In our study, the most influential factors of local plant diversity at both grain sizes were climate variables, followed by soil humus content, litter cover, and soil pH. Soil and litter effects were primarily driven by the response of locally rare species, while climate and grazing effects were driven by locally common species. The strength of most of these effects varied between spatial scales, affecting β ‐diversity. Soil properties influenced β ‐diversity through changes in total plant community cover, while the effects of climate and litter operated via changes in species evenness and aggregation. Our findings highlight that b...