Where Resource‐Acquisitive Species Are Located: The Role of Habitat Heterogeneity
Where Resource‐Acquisitive Species Are Located: The Role of Habitat Heterogeneity
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DOI：
10.1029/2020gl087626
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发表时间：
2020-04
影响因子：
5.2
通讯作者：
B. Seyednasrollah;J. Clark
中科院分区：
文献类型：
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作者：
B. Seyednasrollah;J. Clark
气温上升和干旱加剧给未来生物多样性的管理带来了两个挑战。首先，最脆弱的物种是否集中在特定地区和栖息地？第二，景观异质性在哪里有可能减轻影响？我们对美国东部的森林地块进行了全面的特征分析，以量化资源获取型物种对水分-土壤-气候相互作用的反应。我们发现，资源获取型物种，包括营养获取型和水分获取型物种，对环境梯度的反应不成比例，它们的反应在很大程度上是由土壤变化来解释的。我们发现，获取资源的物种的强烈边界出现在最后一次冰川极限附近，突出了土壤控制最明显的指标之一。虽然当地的土壤湿度可以减轻干旱诱导的水分获取型物种的压力，但在干燥气候的潮湿土壤上，养分获取型物种仍然脆弱。结果表明，解释物种分布的理论应密切关注当地排水和土壤类型的结合。
Rising temperatures with increased drought pose two challenges for management of future biodiversity. First, are the most vulnerable species concentrated in specific regions and habitats? Second, where can landscape heterogeneity potentially mitigate impacts? We conducted a comprehensive trait analysis of forest plots spanning the eastern United States to quantify how resource‐acquisitive species respond to moisture‐soil‐climate interactions. We found that resource‐acquisitive species, including nutrient‐acquisitive and moisture‐acquisitive species, respond disproportionately to environmental gradients, and their response is largely explained by soil variation. We showed that the strong boundary of resource‐acquisitive species occurs near the last glacial limit, highlighting one of the clearest indicators of soil controls. Although local soil moisture may reduce drought‐induced stress for moisture‐acquisitive species, nutrient‐acquisitive species remain vulnerable on wet soils in dry climates. The results suggest that theories explaining species distributions should devote close attention to the combination of local drainage and soil type.