Arid
DOI10.1002/ldr.3170
Does grazing cause land degradation? Evidence from the sandy Ferlo in Northern Senegal
Rasmussen, Kjeld1; Brandt, Martin1; Tong, Xiaoye1; Hiernaux, Pierre2; Diouf, Abdoul Aziz3; Assouma, Mohamed Habibou4; Tucker, Compton J.5; Fensholt, Rasmus1
通讯作者Brandt, Martin
来源期刊LAND DEGRADATION & DEVELOPMENT
ISSN1085-3278
EISSN1099-145X
出版年2018
卷号29期号:12页码:4337-4347
英文摘要

It has been widely asserted that a high grazing pressure has led to a reduction in vegetation production at decadal time scales, implying land degradation, in African drylands, and in the Sahel in particular. We test this hypothesis by analyzing spatiotemporal patterns of vegetation production in the northwestern Ferlo in Senegal. Normalized difference vegetation index (NDVI) patterns, here used to represent vegetation production, were determined on the basis of Earth observation MODIS and PROBA-V data. Furthermore, woody cover was assessed by very high spatial resolution (VHR) imagery. Because livestock is concentrated around deep wells in the dry season for watering, while for management they concentrate daily around pastoral family settlements or camps all year round, we studied the dependence of NDVI on distance from deep wells and camps. Locations of wells and camps were determined by visual inspection of VHR images. We found that ` inverse grazing gradients,’ defined as decreasing NDVI/ production with increasing distance, dominated both around wells and camps. Further, we found neither decrease nor increase in woody cover with distance to wells. Both positive and negative trends in wet season NDVI over the period 2000-2016 were identified within the study area, yet temporal trends were predominantly positive in proximity to deep wells. Around pastoral camps, positive NDVI trends were generally elevated relative to the regional average. The results question the validity of claims that high grazing pressure causes land degradation at the landscape scale, yet they show that grazing does lead to substantial spatial redistribution of vegetation production.


英文关键词Ferlo grazing gradients livestock correspondence overgrazing Sahel
类型Article
语种英语
国家Denmark ; France ; Senegal ; USA
收录类别SCI-E
WOS记录号WOS:000465580100010
WOS关键词ENVIRONMENTAL-CHANGE ; TRENDS ; PRODUCTIVITY ; COVER ; SAHEL ; TIME ; DESERTIFICATION ; DRYLANDS ; AFRICA ; AREAS
WOS类目Environmental Sciences ; Soil Science
WOS研究方向Environmental Sciences & Ecology ; Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211515
作者单位1.Univ Copenhagen, Dept Geosci & Nat Resource Management, Oestervoldgade 10, DK-1350 Copenhagen, Denmark;
2.Pastoralisme Conseil, F-82160 Caylus, France;
3.Ctr Suivi Ecol, Dakar 15532, Senegal;
4.ISRA LNERV, DP PPZS, Dakar, Senegal;
5.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
推荐引用方式
GB/T 7714
Rasmussen, Kjeld,Brandt, Martin,Tong, Xiaoye,et al. Does grazing cause land degradation? Evidence from the sandy Ferlo in Northern Senegal[J],2018,29(12):4337-4347.
APA Rasmussen, Kjeld.,Brandt, Martin.,Tong, Xiaoye.,Hiernaux, Pierre.,Diouf, Abdoul Aziz.,...&Fensholt, Rasmus.(2018).Does grazing cause land degradation? Evidence from the sandy Ferlo in Northern Senegal.LAND DEGRADATION & DEVELOPMENT,29(12),4337-4347.
MLA Rasmussen, Kjeld,et al."Does grazing cause land degradation? Evidence from the sandy Ferlo in Northern Senegal".LAND DEGRADATION & DEVELOPMENT 29.12(2018):4337-4347.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Rasmussen, Kjeld]的文章
[Brandt, Martin]的文章
[Tong, Xiaoye]的文章
百度学术
百度学术中相似的文章
[Rasmussen, Kjeld]的文章
[Brandt, Martin]的文章
[Tong, Xiaoye]的文章
必应学术
必应学术中相似的文章
[Rasmussen, Kjeld]的文章
[Brandt, Martin]的文章
[Tong, Xiaoye]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。