The drought-induced succession decreased ecosystem multifunctionality of alpine swamp meadow

文献类型： 外文期刊

第一作者： Yang, Wen

作者： Yang, Wen;Zhao, Jingxue;Yang, Wen;Zhao, Jingxue;Qu, Guangpeng;Li, Ruicheng;Li, Ruicheng;Wu, Gao-Lin

作者机构：

关键词： Drought-induced succession; Ecological functions; Multifunctionality; Soil water; Soil nutrient content; Swamp meadow

期刊名称：CATENA （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0341-8162

年卷期： 2023 年 231 卷

页码：

收录情况： SCI

摘要： Rapid climate change and intensified anthropogenic disturbances have dropped groundwater level and altered hydrology conditions, provoked the drought-induced succession in alpine swamp meadows. However, we currently lack general cognition on how the drought-induced succession influence the ecosystem structure and functions in alpine swamp meadows. Here, we examined the changes of the main above-and below-ground ecological functions following the drought-induced succession, including swamp meadow to alpine meadow, shrub meadow, and steppe meadow. We found that both above-and below-ground ecosystem multifunctionality (EMF) indexes of the swamp meadows both decreased with the drought-induced succession. Specifically, ecosystem functions of alpine swamp meadow such as plant productivity, soil water content, soil fertility, and carbon and nitrogen all declined consistently following the drought-induced succession. Further, our analysis showed that the dynamics of the above-and below-ground EMF were positively related to plant productivity, soil hydrological properties, and nutrient availability. The decreases in soil water and nutrient contents by the drought-induced succession were the major factors that resulted in the decreased EMF. Taken together, our results demonstrated that the drought-induced succession decreased EMF of alpine swamp meadow, and our finding revealed that soil water and nutrient contents changes were critical indicators of the EMF change during the drought-induced succession. Thus, soil hydrology and nutrient functions conservation are key to maintaining the EMF of alpine swamp meadows under ongoing climate changes.

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