Ecological communities are controlled by multiple, interacting abiotic and biotic factors that influence the distribution, abundance, and diversity of species. These processes jointly determine resource availability, resource competition, and ultimately species richness. For many terrestrial ecosystems in dryland climates, soil water availability is the most frequent limiting resource for plant species. We used field sampling coupled with process‐based soil water balance modeling to explore the relative importance of multiple macroclimatic, ecohydrological, and biotic variables on plant species and functional type richness at the landscape scale in dryland plant communities.

中文翻译：

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中纬度灌木草原植物群落中土壤水分的利用影响物种丰富度

生态群落受到影响物种分布，丰富度和多样性的多种相互作用的非生物和生物因素的控制。这些过程共同决定了资源的可用性，资源竞争以及最终的物种丰富度。对于干旱地区的许多陆地生态系统而言，土壤水的可获得性是植物物种最常见的限制资源。我们使用野外采样结合基于过程的土壤水平衡模型来探讨干旱地区植物群落中多种宏观气候，生态水文和生物变量对植物物种和功能类型丰富度的相对重要性。