干旱区生态环境知识资源中心(Arid): Mapping Vegetation Morphology Types in Southern Africa Savanna Using MODIS Time-Series Metrics: A Case Study of Central Kalahari, Botswana

Arid

DOI	10.3390/land4010197
	Mapping Vegetation Morphology Types in Southern Africa Savanna Using MODIS Time-Series Metrics: A Case Study of Central Kalahari, Botswana
	Mishra, Niti B.; Crews, Kelley A.; Miller, Jennifer A.; Meyer, Thoralf
通讯作者	Mishra, NB
来源期刊	LAND
EISSN	2073-445X
出版年	2015
卷号	4 期号:1 页码:197-215
英文摘要	Savanna ecosystems are geographically extensive and both ecologically and economically important; they therefore require monitoring over large spatial extents. There are, in particular, large areas within southern Africa savanna ecosystems that lack consistent geospatial data on vegetation morphological properties, which is a prerequisite for biodiversity conservation and sustainable management of ecological resources. Given the challenges involved in distinguishing and mapping savanna vegetation assemblages using remote sensing, the objective of this study was to develop a vegetation morphology map for the largest protected area in Africa, the central Kalahari. Six vegetation morphology classes were developed and sample training/validation pixels were selected for each class by analyzing extensive in situ data on vegetation structural and functional properties, in combination with existing ancillary data and coarse scale land cover products. The classification feature set consisted of annual and intra annual matrices derived from 14 years of satellite-derived vegetation indices images, and final classification was achieved using an ensemble tree based classifier. All vegetation morphology classes were mapped with high accuracy and the overall classification accuracy was 91.9%. Besides filling the geospatial data gap for the central Kalahari area, this vegetation morphology map is expected to serve as a critical input to ecological studies focusing on habitat use by wildlife and the efficacy of game fencing, as well as contributing to sustainable ecosystem management in the central Kalahari.
英文关键词	semi-arid savanna vegetation morphology NDVI MODIS time-series random forest spatial heterogeneity CKGR Kalahari
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000365120300009
WOS关键词	LAND-COVER CLASSIFICATION ; SPATIAL-RESOLUTION ; FRACTIONAL COVER ; RANDOM FORESTS ; IMAGE-ANALYSIS ; TREE ; DEGRADATION ; DYNAMICS ; GRADIENT ; SYSTEMS
WOS类目	Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331171
作者单位	[Mishra, Niti B.; Crews, Kelley A.; Miller, Jennifer A.; Meyer, Thoralf] Univ Texas Austin, Dept Geog & Environm, 305 E 23rd St,CLA 3-306, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Mishra, Niti B.,Crews, Kelley A.,Miller, Jennifer A.,et al. Mapping Vegetation Morphology Types in Southern Africa Savanna Using MODIS Time-Series Metrics: A Case Study of Central Kalahari, Botswana[J],2015,4(1):197-215.
APA	Mishra, Niti B.,Crews, Kelley A.,Miller, Jennifer A.,&Meyer, Thoralf.(2015).Mapping Vegetation Morphology Types in Southern Africa Savanna Using MODIS Time-Series Metrics: A Case Study of Central Kalahari, Botswana.LAND,4(1),197-215.
MLA	Mishra, Niti B.,et al."Mapping Vegetation Morphology Types in Southern Africa Savanna Using MODIS Time-Series Metrics: A Case Study of Central Kalahari, Botswana".LAND 4.1(2015):197-215.