DOI: 10.1016/j.jag.2013.11.014
Scopus记录号: 2-s2.0-84897456146
论文题名: Remote sensing of vegetation cover dynamics and resilience across southern Africa
作者: Harris A ; , Carr A ; S ; , Dash J
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 28, 期: 1 起始页码: 131
结束页码: 139
语种: 英语
英文关键词: Africa
; AVHRR
; Land degradation
; NDVI
; Remote sensing
; Trend analysis
Scopus关键词: AVHRR
; biodiversity
; NDVI
; satellite data
; satellite imagery
; survival
; terrestrial ecosystem
; vegetation cover
; vegetation dynamics
; Southern Africa
英文摘要: Southern Africa supports a significant portion of the world's floral biodiversity but predicted changes in climate are likely to cause adverse impacts on the region's ecosystems and biodiversity. Knowledge regarding the resilience of vegetation cover is important for understanding the potential impact of anthropic or climatic change. The length of time vegetation cover takes to recover from disturbances can provide an indication of ecosystem resilience. We investigated spatial and temporal patterns in the persistence of vegetation cover across southern Africa (1982-2006) and used persistence probability plots to estimate decay times of NDVI trends as a means to characterise the potential resilience of key southern African biomes. Patterns of positive and negative NDVI trend persistence were spatially coherent, indicating collective dynamic behaviour of vegetation cover. Persistence probability plots indicated differences in resilience between biomes. Mean recovery times from negative NDVI trends were shorter than for positive trends in the Savanna and Nama Karoo, whereas the Succulent Karoo exhibited the shortest mean lifetime for positive NDVI trends and one of the longest mean lifetimes for negative trend survival, implying potentially slow recovery from environmental disturbance. The results show the potential of satellite-time series data for monitoring vegetation cover resilience in semi-arid regions. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79770
Appears in Collections: 气候变化事实与影响
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作者单位: Geography, School of Environment and Development, University of Manchester, Manchester M13 9PL, United Kingdom; Department of Geography, University of Leicester, Leicester LE1 7RH, United Kingdom; Geography and Environment, University of Southampton, Southampton SO17 1BJ, United Kingdom
Recommended Citation:
Harris A,, Carr A,S,et al. Remote sensing of vegetation cover dynamics and resilience across southern Africa[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,28(1)