Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion
Zou, JR; Luo, CY; Xu, XL; Zhao, N; Zhao, L; Zhao, XQ
2016
Source PublicationECOLOGICAL RESEARCH
ISSN0912-3814
Volume31Issue:6Pages:841-851
AbstractGrazing exclusion is widely used globally to restore degraded grasslands. Plant diversity has important impacts on grassland ecosystem functions, including grassland productivity and carbon storage. In this study, we selected a Kobresia meadow on the Qinghai-Tibetan Plateau to investigate how grazing exclusion affects plant diversity. Inorganic nitrogen (NH4 (+) and NO3 (-)) was also measured because its availability impacts plant growth. We found that plant diversity in the meadow was significantly lower under grazing exclusion (fenced meadow) for 9 years compared with moderate grazing. Accumulated litter was significantly higher under grazing exclusion (386.41 g m(-2)) compared with grazing (58.77 g m(-2)). Soil inorganic nitrogen at 0-5 cm depth was significantly higher under grazing exclusion (13.60 x 10(-2) g kg(-1)) than under grazing (9.40 x 10(-2) g kg(-1)). The composition of the four functional groups (grasses, sedges, legumes, and forbs) might alter in response to significant changes in the amount of litter and soil available nitrogen content under grazing exclusion compared with grazing. However, the enhanced soil available nitrogen content showed weak feedbacks on plant diversity. In conclusion, light limitation induced by increased amounts of litter may be the main factor causing decreased plant diversity in grazing-excluded meadows compared with moderately grazed meadows.
SubtypeJournal
KeywordFence Functional groups Grassland Light limitation Vegetation
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEcology
WOS KeywordQINGHAI-TIBET PLATEAU ; LIVESTOCK EXCLOSURE ; GRASSLAND DIVERSITY ; SPECIES-DIVERSITY ; TALLGRASS PRAIRIE ; ELEVATED CO2 ; PRODUCTIVITY ; BIODIVERSITY ; CARBON ; COMMUNITY
Indexed BySCI
Language英语
WOS IDWOS:000387344900009
PublisherSPRINGER JAPAN KK
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44162
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zou, JR,Luo, CY,Xu, XL,et al. Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion[J]. ECOLOGICAL RESEARCH,2016,31(6):841-851.
APA Zou, JR,Luo, CY,Xu, XL,Zhao, N,Zhao, L,&Zhao, XQ.(2016).Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion.ECOLOGICAL RESEARCH,31(6),841-851.
MLA Zou, JR,et al."Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion".ECOLOGICAL RESEARCH 31.6(2016):841-851.
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