The drought-induced succession decreased ecosystem multifunctionality of alpine swamp meadow
文献类型： 外文期刊
作者： Yang, Wen 1 ; Zhao, Jingxue 1 ; Qu, Guangpeng 3 ; Li, Ruicheng 4 ; Wu, Gao-Lin 6 ;
作者机构： 1.Lanzhou Univ, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou 730000, Peoples R China
2.Lanzhou Univ, Coll Ecol, Lanzhou 730000, Peoples R China
3.Tibet Acad Agr & Anim Husb Sci, Grassland Sci Inst, State Key Lab Hulless Barley & Yak Germplasm Resou, Lhasa 850002, Peoples R China
4.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China
5.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China
6.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling 712100, Shaanxi, Peoples R China
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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