文献类型： 外文期刊

作者： Tian, Lihua ¹ ; Yang, Wen ³ ; Ji-Shi, Awei ¹ ; Ma, Yunhe ³ ; Zhao, Wenxue ¹ ; Chen, Youjun ¹ ; Zhou, Qingping ¹ ; Qu, Guangpeng ¹ ; Zhao, Jingxue ³ ; Wu, Gao-Lin ⁶ ;

作者机构： 1.Southwest Minzu Univ, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Chengdu, Peoples R China

2.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu, Peoples R China

3.Lanzhou Univ, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou, Peoples R China

4.Lanzhou Univ, Coll Ecol, Lanzhou, Peoples R China

5.Tibet Acad Agr & Anim Husb Sci, Grassland Sci Inst, State Key Lab Hulless Barley & Yak Germplasm Resou, Lhasa, Peoples R China

6.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling, Peoples R China

7.Lanzhou Univ, Coll Ecol, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou 730000, Peoples R China

8.Lanzhou Univ, Coll Ecol, Lanzhou 730000, Peoples R China

9.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： alpine sandy meadow; multifunctionality; productivity; reseeding restoration; soil fertility; species richness

期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.7； 五年影响因子：5.0 ）

ISSN： 1085-3278

年卷期： 2023 年 34 卷 7 期

页码：

收录情况： SCI

摘要： Desertification in alpine grasslands is exacerbated by rapid climate change and intensive anthropogenic activity, which will substantially threaten the structure and function of alpine grassland ecosystems. Artificial reseeding was a widely used strategy for the restoration of alpine sandy grasslands. However, it is still unclear whether reseeding restoration can improve multiple ecosystem functions of sandy meadows. To narrow these knowledge gaps, we evaluated the changes in plant communities, soil conditions, and ecosystem multifunctionality (EMF) across native meadow, sandy meadow, and restored meadow on the eastern Tibetan Plateau, and further identified the links between individual and multiple ecosystem functions. Artificial reseeding had contributed to the promotion of plant diversity, productivity, soil fertility, and soil carbon and nitrogen sequestrations. However, the recovery levels of plant diversity, productivity, and soil fertility in the restored meadow were still far lower than that in the native meadow. The results revealed that the EMF index of the restored meadow increased greatly compared with the sandy meadow, but it did not recover to that of the native meadow level. In addition, short-term reseeding improved the aboveground EMF index more than the belowground EMF index. The EMF indexes and most individual ecosystem functions showed positive correlations with plant diversity and productivity. These findings indicated an important role of artificial reseeding in the restoration of ecosystem functions in the alpine sandy meadow, and it had critical implications for the regional ecological security and sustainable development of alpine grasslands.