干旱区生态环境知识资源中心(Arid): Effects of Droughts on Vegetation Condition and Ecosystem Service Delivery in Data-Poor Areas: A Case of Bobirwa Sub-District, Limpopo Basin and Botswana

Arid

DOI	10.3390/su12198185
	Effects of Droughts on Vegetation Condition and Ecosystem Service Delivery in Data-Poor Areas: A Case of Bobirwa Sub-District, Limpopo Basin and Botswana
	Mugari, Ephias; Masundire, Hillary; Bolaane, Maitseo
通讯作者	Mugari, E
来源期刊	SUSTAINABILITY
EISSN	2071-1050
出版年	2020
卷号	12 期号:19
英文摘要	Understanding the effects of droughts on vegetation and ecosystem services (ES) is important for climate change adaptation. However, drought occurrence varies across space and time. We examined drought dynamics and impacts on vegetation and ES in the semi-arid Limpopo Basin of Botswana. Weather station precipitation, remotely sensed normalized difference vegetation index (NDVI) and participatory mapping exercises provided data for the analyses. Results show that between 1980 and 2015, rainfall anomaly indices of potential drought years ranged between -4.38 and -0.12. The longest spell of below-average rainfall occurred between 1992 and 1996. On average, drought events lasted for 1.9 years and recurred every 2.3 years. Although the overall drought frequency was 3.7 times in every 5 years, drought prevalence increased to 50%, 60% and 70% between 1981-1990, 1991-2000, and 2001-2010, respectively. The wet season average vegetation condition index between 2000 and 2015 revealed the occurrence of severe-to-extreme droughts in 2002-2003, 2005, 2008-2009 and 2012-2013 and light-to-moderate droughts in 2004, 2006-2007 and 2011, giving a drought prevalence of 73.3%. The increased frequency and severity of droughts is diminishing natural vegetation, crop productivity and several provisioning ES through moisture stress and drought-induced agricultural expansions. There exists an urgent need for smallholder irrigation development in Bobirwa sub-district to improve crop productivity and reduce the drought-induced conversion of woodlands to agriculture.
英文关键词	drought severity drought recurrence drought duration vegetation condition index NDVI remote sensing semi-arid areas Limpopo Basin Botswana
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000586407100001
WOS关键词	CONDITION INDEX VCI ; GLOBAL DROUGHT ; LAND-COVER ; PRECIPITATION ; DEFORESTATION ; IMPACTS ; TRENDS ; SAHEL
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327344
作者单位	[Mugari, Ephias; Masundire, Hillary] Univ Botswana, Fac Sci, Dept Biol Sci, Private Bag UB0022, Gaborone, Botswana; [Bolaane, Maitseo] Univ Botswana, Fac Humanities, Dept Hist, Private Bag UB0022, Gaborone, Botswana
推荐引用方式 GB/T 7714	Mugari, Ephias,Masundire, Hillary,Bolaane, Maitseo. Effects of Droughts on Vegetation Condition and Ecosystem Service Delivery in Data-Poor Areas: A Case of Bobirwa Sub-District, Limpopo Basin and Botswana[J],2020,12(19).
APA	Mugari, Ephias,Masundire, Hillary,&Bolaane, Maitseo.(2020).Effects of Droughts on Vegetation Condition and Ecosystem Service Delivery in Data-Poor Areas: A Case of Bobirwa Sub-District, Limpopo Basin and Botswana.SUSTAINABILITY,12(19).
MLA	Mugari, Ephias,et al."Effects of Droughts on Vegetation Condition and Ecosystem Service Delivery in Data-Poor Areas: A Case of Bobirwa Sub-District, Limpopo Basin and Botswana".SUSTAINABILITY 12.19(2020).