气候变化领域集成服务门户(CCPortal): Plant community changes determine the vegetation and soil delta C-13 and delta N-15 enrichment in degraded alpine grassland

CCPortal

DOI	10.1002/ldr.3912
	Plant community changes determine the vegetation and soil delta C-13 and delta N-15 enrichment in degraded alpine grassland
	Li, Chengyang; Peng, Fei; Lai, Chimin; Xue, Xian; You, Quangang; Chen, Xiaojie; Liao, Jie; Ma, Shaoxiu; Wang, Tao
通讯作者	Peng, F (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	1085-3278
EISSN	1099-145X
起始页码	2371
结束页码	2382
卷号	32 期号:7
英文摘要	delta C-13 and delta N-15 are extensively used to understand the biogeochemical mechanisms that moderate ecosystem carbon (C) and nitrogen (N) processes. Little is known about the responses of delta C-13 and delta N-15 to alpine grassland degradation on the Qinghai-Tibetan Plateau (QTP), which prevents a full understanding of degradation-induced changes in C and N cycling there. We investigated the vegetation delta C-13 and delta N-15, soil delta C-13 and delta N-15, soil properties, and plant community composition of alpine grassland on the QTP that were in different states of degradation. Our results show that the vegetation delta C-13 and delta N-15, and soil delta C-13 and delta N-15, increased with the severity of degradation, whereas soil organic carbon (SOC) and total N content decreased as degradation became more severe. The aboveground biomass percentage of forbs was positively correlated with the soil C/N ratio, vegetation delta C-13, and soil delta C-13, and accounted for the largest proportion of the variance for both vegetation delta C-13 and soil delta C-13 (17.25 and 23.65%, respectively). The vegetation delta N-15 and soil delta N-15 were negatively correlated with the soil C/N ratio, which explained the largest proportion of the variance (18.01 and 25.81%, respectively). Our results suggest that C cycling is strongly moderated by plant community composition, because forbs species and C-4 species, were more prevalent in degraded alpine grassland. Meanwhile, N cycling is indirectly regulated by changes in community composition via its effect on the soil C/N as the degradation became more severe for alpine grassland on the QTP.
英文关键词	carbon and nitrogen cycling; land degradation; plant functional groups; Qinghai‐ Tibetan Plateau; soil properties
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
WOS记录号	WOS:000626534700001
来源期刊	LAND DEGRADATION & DEVELOPMENT
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/253677
作者单位	[Li, Chengyang; Peng, Fei; Lai, Chimin; Xue, Xian; You, Quangang; Chen, Xiaojie; Liao, Jie; Ma, Shaoxiu; Wang, Tao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China; [Li, Chengyang; Lai, Chimin] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China; [Peng, Fei] Int Platform Dryland Res & Educ, Tottori, Japan; [Peng, Fei] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Li, Chengyang,Peng, Fei,Lai, Chimin,et al. Plant community changes determine the vegetation and soil delta C-13 and delta N-15 enrichment in degraded alpine grassland[J]. 中国科学院西北生态环境资源研究院,2021,32(7).
APA	Li, Chengyang.,Peng, Fei.,Lai, Chimin.,Xue, Xian.,You, Quangang.,...&Wang, Tao.(2021).Plant community changes determine the vegetation and soil delta C-13 and delta N-15 enrichment in degraded alpine grassland.LAND DEGRADATION & DEVELOPMENT,32(7).
MLA	Li, Chengyang,et al."Plant community changes determine the vegetation and soil delta C-13 and delta N-15 enrichment in degraded alpine grassland".LAND DEGRADATION & DEVELOPMENT 32.7(2021).