Precipitation does not amplify the efficiency of fencing measures for temperate grassland restoration: A case study in northern China based on remote sensing
文献类型：期刊论文
| 作者 | Sun, Feifei1,2; Sun, Wenjuan1; Huang, Yao1; Zhang, Wen3; Yu, Lingfei1; Wang, Jiating4 |
| 刊名 | ECOLOGICAL ENGINEERING
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 105页码:252-261 |
| 关键词 | Normalized difference vegetation index Change detection Fencing effect Precipitation lag effect Inner Mongolian grassland |
| ISSN号 | 0925-8574 |
| DOI | 10.1016/j.ecoleng.2017.05.004 |
| 通讯作者 | Sun, Wenjuan(sunwj@ibcas.ac.cn) |
| 英文摘要 | Increasing anthropogenic interventions involving utilization and conservation of vegetated ecosystems has attracted considerable attention focused on large-scale assessments of the roles played by human domination. The effects of specific anthropogenic measures have generally been ignored by large-scale assessments, which has probably resulted in irrational regulations and imprecise understanding of these specific measures. This paper aims to reveal the effect of a grassland restoration measure fencing in northern China as well as the spatial patterns of fencing efficiency. Spatially continuous Normalized Difference Vegetation Index (NDVI) data based on remote sensing was used to detect grassland vegetation changes during fencing periods. Using subsequent processes to smooth the impact of precipitation from the current year and by setting thresholds for identifying changed/unchanged NDVI, the spatial vegetation changes were converted into two groups of statistical data: the mean NDVI-increase value in each sample region and the pixel areas with different grassland change types in each sample region. The precipitation lag effect on NDVI increases was assessed by multiple comparison tests, and regions with a significant precipitation lag effect were removed from the fencing effect assessment. Finally, the areas with different grassland change types were related to changes in fenced area using regression analyses under different precipitation gradients. The results indicated that the precipitation lag effect caused by legacy moisture significantly affected the spatio-temporal vegetation changes. By excluding the regions with legacy moisture, the increase in fenced area facilitated an expansion of improved grassland and a reduction in degraded grassland. Fencing efficiency was maximized in the 250-300-mm precipitation zone, where the expansion rate of improved grassland area reached 0.70 (R-2 = 0.54, p < 0.01). The second-best and least effective zones lay in the mean annual precipitation (MAP) >300-mm and MAP <250 mm zones, respectively. We conclude that a wetter climate does not automatically result in a better fencing effect, and legacy moisture will lead to an overestimation of the fencing effect. A rational fencing implementation should consider the resilience and degradation degree of steppes. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | NET PRIMARY PRODUCTION ; RAIN-USE EFFICIENCY ; PRIMARY PRODUCTIVITY ; GRAZING EXCLUSION ; INNER-MONGOLIA ; HUMAN APPROPRIATION ; ABOVEGROUND BIOMASS ; TIBETAN PLATEAU ; NDVI DATA ; GRADIENT |
| 资助项目 | National Basic Research Programme of China (973 Program)[2014CB954303] ; National Basic Research Programme of China (973 Program)[2014CB954004] |
| WOS研究方向 | Environmental Sciences & Ecology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000404305300028 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Basic Research Programme of China (973 Program) |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/63001]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Sun, Wenjuan |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, 11A Datun Rd, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys & Atmospher Chem, State Key Lab Atmospher Boundary Layer, POB 9804, Beijing 100029, Peoples R China 4.Minist Agr, Dept Livestock Prod, 11 Nongzhanguan Nanli, Beijing 100125, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Feifei,Sun, Wenjuan,Huang, Yao,et al. Precipitation does not amplify the efficiency of fencing measures for temperate grassland restoration: A case study in northern China based on remote sensing[J]. ECOLOGICAL ENGINEERING,2017,105:252-261. |
| APA | Sun, Feifei,Sun, Wenjuan,Huang, Yao,Zhang, Wen,Yu, Lingfei,&Wang, Jiating.(2017).Precipitation does not amplify the efficiency of fencing measures for temperate grassland restoration: A case study in northern China based on remote sensing.ECOLOGICAL ENGINEERING,105,252-261. |
| MLA | Sun, Feifei,et al."Precipitation does not amplify the efficiency of fencing measures for temperate grassland restoration: A case study in northern China based on remote sensing".ECOLOGICAL ENGINEERING 105(2017):252-261. |
入库方式： OAI收割
来源：地理科学与资源研究所
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