Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion
文献类型：SCI/SSCI论文
| 作者 | Zou J. R.; Luo, C. Y.; Xu, X. L.; Zhao, N.; Zhao, L.; Zhao, X. Q.; Xu, XL; Xu, XL |
| 发表日期 | 2016 |
| 关键词 | Fence Functional groups Grassland Light limitation Vegetation qinghai-tibet plateau livestock exclosure grassland diversity species-diversity tallgrass prairie elevated co2 productivity biodiversity carbon community |
| 英文摘要 | Grazing 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. |
| 出处 | Ecological Research |
| 卷 | 31 |
| 期 | 6 |
| 页 | 841-851 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0912-3814 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43980]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_生态网络实验室 |
| 推荐引用方式 GB/T 7714 | Zou J. R.,Luo, C. Y.,Xu, X. L.,et al. Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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