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| DOI | 10.1007/s12517-016-2801-3 |
| Impacts of climate change and human activities on the aboveground production in alpine grasslands: a case study of the source region of the Yellow River, China | |
| Xu H.-J.; Wang X.-P.; Zhang X.-X. | |
| 发表日期 | 2017 |
| ISSN | 18667511 |
| 卷号 | 10期号:1 |
| 英文摘要 | Changes in aboveground net primary productivity (ANPP) in alpine grasslands are the consequence of climate change and human activities, but it is difficult to disentangle their relative contributions. Based on monthly remote-sensed vegetation index and meteorological data during the period 1982–2010, we analysed the long-term variation of annual ANPP in the source region of the Yellow River and quantified the effects of climate and human activities including grazing on ANPP variability, using the Carnegie–Ames–Stanford Approach (CASA) model and the ANPP-based residual trend analysis method. Our results suggested that ANPP increased in 80% of alpine grasslands. Areas with negative changes in ANPP were found mainly in the eastern portion of the region, accounting for 0.3% of alpine grasslands. ANPP was positively correlated with the monthly mean temperature from June to September and the sunshine duration in September at a regional scale. Moreover, ANPP was negatively correlated with the total livestock numbers. Using the residual trend analysis method, we demonstrated that climate and human activities accounted for 76.6 and 23.4%, respectively, of the variability in ANPP for the entire study region in 1982–2010. We concluded that climate change alleviated climatic constraints, in particular temperature limitations and sunshine duration, resulting in a significant increase in ANPP. Overgrazing was supposed to be the primary driver for grassland degradation in the eastern region. Our study has implications for grassland management and its sustainability to minimize the risk of grassland degradation and desertification processes in geo-ecologically and socially important regions such as the study region in China. © 2016, Saudi Society for Geosciences. |
| 英文关键词 | Alpine vegetation; Ecosystem function; Grassland degradation; Grazing; Temperature |
| URL | https://www2.scopus.com/inward/record.uri?eid=2-s2.0-85007621174&doi=10.1007%2fs12517-016-2801-3&partnerID=40&md5=afcb98a36c7a0f9062de72135f662e96 |
| 语种 | 英语 |
| scopus关键词 | aboveground biomass; alpine environment; climate change; desertification; ecosystem function; grassland; grazing; human activity; livestock; long-term change; NDVI; net primary production; risk assessment; sustainability; temperature; trend analysis; vegetation dynamics; China; Yellow River |
| 来源期刊 | Arabian Journal of Geosciences
 |
| 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/77281 |
| 推荐引用方式 GB/T 7714 | Xu H.-J.； Wang X.-P.； Zhang X.-X.. Impacts of climate change and human activities on the aboveground production in alpine grasslands: a case study of the source region of the Yellow River, China[J]. 中国科学院西北生态环境资源研究院,2017,10(1). |
| APA | Xu H.-J.； Wang X.-P.； Zhang X.-X..(2017).Impacts of climate change and human activities on the aboveground production in alpine grasslands: a case study of the source region of the Yellow River, China.Arabian Journal of Geosciences,10(1). |
| MLA | Xu H.-J.； Wang X.-P.； Zhang X.-X.."Impacts of climate change and human activities on the aboveground production in alpine grasslands: a case study of the source region of the Yellow River, China".Arabian Journal of Geosciences 10.1(2017). |
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