气候变化领域集成服务门户(CCPortal): Direct and indirect effects of precipitation change and nutrients addition on desert steppe productivity in Inner Mongolia, northern China

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DOI	10.1007/s11104-021-05206-2
	Direct and indirect effects of precipitation change and nutrients addition on desert steppe productivity in Inner Mongolia, northern China
	Guo, Xinxin; Zuo, Xiaoan; Yue, Ping; Li, Xiangyun; Hu, Ya; Chen, Min; Yu, Qiang
通讯作者	Zuo, XA (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0032-079X
EISSN	1573-5036
起始页码	527
结束页码	540
卷号	471 期号:1-2
英文摘要	Background and Aims Global changes (precipitation changes and nutrient deposition) profoundly impact structure and function of steppe ecosystem. However, it is unclear the mechanism by which multiple limiting resources affect plant aboveground net primary productivity (ANPP) in desert steppe. Methods We conducted a field experiment manipulating both precipitation (3 levels: ambient and +/- 50% precipitation) and nutrients addition (3 levels: ambient; nitrogen (N) addition; N/phosphorus (P)/potassium (K) addition) in a factorial design. We focused on the effects of these treatments on species diversity (species richness, Shannon index, abundance), ANPP, plant functional traits, and soil properties. We used structural equation model (SEM) to evaluate the direct and indirect effects of precipitation amount and nutrient addition on ANPP through affecting species diversity and functional traits. Results Increasing precipitation increased species diversity and ANPP. NPK addition and increased 50% precipitation significantly increased ANPP over all other treatment combinations. Drought (-50%) reduced plant height and leaf dry matter content (LDMC), but increased leaf nitrogen content (LNC). Species richness, abundance, height and LDMC were positively correlated with ANPP, while specific leaf area (SLA) and LNC were negatively correlated with ANPP. SEM suggested that precipitation amount indirectly affected ANPP through its effect on abundance and SLA, while nutrient addition indirectly affected ANPP only through its effect on abundance. Conclusion In desert steppe, the interaction of precipitation and nutrient addition had a significant positive effect on ANPP, which was mainly mediated by species diversity and functional traits. Our results highlight the importance of species diversity and functional traits in driving short-term responses of ANPP to environmental factors in desert steppe ecosystems.
关键词	PLANT FUNCTIONAL TRAITS NITROGEN ADDITION PHOSPHORUS LIMITATION ECOSYSTEM RESPIRATION COMMUNITY COMPOSITION SPECIES RICHNESS SOIL PROPERTIES CLIMATE-CHANGE CO-LIMITATION LEAF-AREA
英文关键词	Multiple limiting resources; aboveground net primary productivity; Species diversity; community-level functional traits; Structural equation model
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000739232900001
来源期刊	PLANT AND SOIL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253720
作者单位	[Guo, Xinxin; Zuo, Xiaoan; Yue, Ping; Li, Xiangyun; Hu, Ya; Chen, Min] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Peoples R China; [Guo, Xinxin; Zuo, Xiaoan; Li, Xiangyun; Hu, Ya] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Lanzhou 730000, Peoples R China; [Guo, Xinxin; Li, Xiangyun; Hu, Ya] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Guo, Xinxin; Zuo, Xiaoan; Yue, Ping; Li, Xiangyun; Chen, Min] Key Lab Stress Physiol & Ecol Cold & Arid Reg, Lanzhou 730000, Peoples R China; [Yu, Qiang] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Guo, Xinxin,Zuo, Xiaoan,Yue, Ping,et al. Direct and indirect effects of precipitation change and nutrients addition on desert steppe productivity in Inner Mongolia, northern China[J]. 中国科学院西北生态环境资源研究院,2022,471(1-2).
APA	Guo, Xinxin.,Zuo, Xiaoan.,Yue, Ping.,Li, Xiangyun.,Hu, Ya.,...&Yu, Qiang.(2022).Direct and indirect effects of precipitation change and nutrients addition on desert steppe productivity in Inner Mongolia, northern China.PLANT AND SOIL,471(1-2).
MLA	Guo, Xinxin,et al."Direct and indirect effects of precipitation change and nutrients addition on desert steppe productivity in Inner Mongolia, northern China".PLANT AND SOIL 471.1-2(2022).