干旱区生态环境知识资源中心(Arid): The response of vegetation cover and dune activity to rainfall, drought and fire observed by multitemporal satellite imagery

Arid

DOI	10.1002/esp.4721
	The response of vegetation cover and dune activity to rainfall, drought and fire observed by multitemporal satellite imagery
	Fisher, Adrian 1,2; Hesse, Paul P.3
通讯作者	Fisher, Adrian
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2019
卷号	44 期号:15 页码:2957-2967
英文摘要	The stable longitudinal dunes in the northern Simpson Desert, Australia, were observed in satellite imagery to become more active after vegetation cover was reduced by fire and drought. Subsequent rainfall events also resulted in significant vegetation regrowth and dune stabilization. These switches between more active and stable conditions have not been previously described in the largely vegetated dune fields of central Australia. The observations, made on 12 dune sites, relied on high spatial resolution satellite imagery to observe dune crest activity, and seasonal Landsat fractional cover imagery to observe vegetation cover changes. The non-photosynthetic vegetation (NPV) component of the fractional vegetation cover images revealed significant changes in hummock grass cover on the dunes between 1988 and 2018, with a positive relationship with the three-year cumulative rainfall, disrupted by two periods of patchy burning. Only those sites that had burnt became active, and only after vegetation cover had remained low (NPV < 16%) during the 'Millennium Drought'. There is no threshold in vegetation cover, below which dune crests become active, but active dune features require four-years of low NPV cover (< 16%) to develop. The large rainfall event that ended the drought increased NPV cover, stabilizing the dunes. Similar hummock grass covered dunes are present across large areas of the arid zone, and are likely to respond in similar ways, given that fire and drought are common occurrences in Australia. (c) 2019 John Wiley & Sons, Ltd.
英文关键词	longitudinal dunes Landsat high-resolution imagery Simpson Desert aeolian
类型	Article
语种	英语
国家	Australia
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000489881800001
WOS关键词	LANDSAT TM/ETM PLUS ; SAND-DUNES ; SURFACE REFLECTANCE ; DESERT ; SYSTEMS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215097
作者单位	1.Univ Queensland, Sch Earth & Environm Sci, Joint Remote Sensing Res Program, Brisbane, Qld, Australia; 2.Univ New South Wales, Ctr Ecosyst Sci, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia; 3.Macquarie Univ, Dept Environm Sci, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Fisher, Adrian,Hesse, Paul P.. The response of vegetation cover and dune activity to rainfall, drought and fire observed by multitemporal satellite imagery[J],2019,44(15):2957-2967.
APA	Fisher, Adrian,&Hesse, Paul P..(2019).The response of vegetation cover and dune activity to rainfall, drought and fire observed by multitemporal satellite imagery.EARTH SURFACE PROCESSES AND LANDFORMS,44(15),2957-2967.
MLA	Fisher, Adrian,et al."The response of vegetation cover and dune activity to rainfall, drought and fire observed by multitemporal satellite imagery".EARTH SURFACE PROCESSES AND LANDFORMS 44.15(2019):2957-2967.