Land management modulates the environmental controls on global earthworm communities
Land management modulates the environmental controls on global earthworm communities
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DOI：
10.1111/geb.12992
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发表时间：
2019-08
影响因子：
6.4
通讯作者：
Alice S. A. Johnston
中科院分区：
文献类型：
--
作者：
Alice S. A. Johnston
目标土壤及其生物群落面临着来自土地管理和气候变化等多种全球驱动因素日益增加的压力。在土壤中，蚯蚓在生态系统功能中发挥着关键作用，但对其全球社区的环境控制尚未完全了解。在这里，编制了一个可持续发展数据集，以调查环境变量和土地管理对全球可持续发展社区的影响。位置40° S-65° N。1962年至2016年。主要分类群研究蚯蚓。方法在全球169个分布的地点收集了899个自然保护区的观测数据和环境变量。地点包括天然森林和草地或管理的耕地、牧场和种植园生态系统。总，anecic，endogeic和epigeic丰度和总物种丰富度进行了比较，在自然和管理的生态系统，以量化土地管理的影响跨气候。一个层次模型被用来测试环境控制的重要性，在全球范围内预测总的浮游生物物种丰富度和丰度之间的关系。结果在全球范围内，土地管理对群落总丰度的影响不大，但降低了物种丰富度，改变了群落组成。内生蚯蚓在管理的生态系统中更丰富，而anecic和epigeic蚯蚓在不同的生态系统类型中表现出不同的反应。总的物种丰富度和丰度之间的全球关系的解释气候，土壤pH值和土地管理。主要结论土地管理调制的影响，环境控制对全球性的植被群落，通过直接干扰和间接改变土壤条件。
Aim Soils and their biological communities face increasing pressure from multiple global drivers, including land management and climate change. In soils, earthworms play key roles in ecosystem functioning, but the environmental controls on their global communities are not fully understood. Here, an earthworm dataset was compiled to investigate the effects of environmental variables and land management on global earthworm communities. Location 40° S–65° N. Time period 1962 to 2016. Major taxa studied Earthworms. Methods A dataset of 899 earthworm community observations, together with environmental variables, was compiled across 169 globally distributed sites. Sites included natural forest and grassland or managed arable, pasture and plantation ecosystems. Total, anecic, endogeic and epigeic abundances and total species richness were compared in natural and managed ecosystems to quantify the effects of land management across climates. A hierarchical model was used to test the importance of environmental controls in predicting the relationship between total earthworm species richness and abundance at a global scale. Results Land management prompted little change in total earthworm abundance at the global scale, but reduced species richness and shifted community composition. Endogeic earthworms were more abundant in managed ecosystems, while anecic and epigeic earthworms showed variable responses across ecosystem types. Global relationships between total earthworm species richness and abundance were explained by climate, soil pH and land management. Main conclusions Land management modulates the effects of environmental controls on global earthworm communities, through direct disturbance and indirect changes in edaphic conditions.