干旱区生态环境知识资源中心(Arid): Remote sensing of trophic cascades: multi-temporal landsat imagery reveals vegetation change driven by the removal of an apex predator

Arid

DOI	10.1007/s10980-021-01206-w
	Remote sensing of trophic cascades: multi-temporal landsat imagery reveals vegetation change driven by the removal of an apex predator
	Fisher, Adrian G.; Mills, Charlotte H.; Lyons, Mitchell; Cornwell, William K.; Letnic, Mike
通讯作者	Fisher, AG (corresponding author), Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia.
来源期刊	LANDSCAPE ECOLOGY
ISSN	0921-2973
EISSN	1572-9761
出版年	2021
卷号	36 期号:5 页码:1341-1358
英文摘要	Context Trophic cascade theory predicts that predators indirectly benefit plants by limiting herbivore consumption. As humans have removed large predators from most terrestrial ecosystems the effect of their absence is unrecognized. Objectives A manipulation of dingo populations across Australia's dingo-proof fence, within the Strzelecki Desert, was used to assess how predator absence has altered vegetation cover dynamics at landscape and site scales. Methods Landscape-scale analysis used Landsat fractional vegetation cover time series statistics to classify landforms and examine vegetation dynamics either side of the dingo fence. Generalised additive models were used to analyse the influence of predator absence on site-scale observations of fauna abundance and vegetation cover. Results The location of the dingo fence was visible as a change in both the standard deviation and maximum of non-photosynthetic vegetation (NPV) cover (e.g. wood and dry leaves) over 32 years (1988-2020). On average, NPV cover of swales decreased in the standard deviation by 1.4% and in the maximum by 5.0% where dingo abundance was reduced. The differences were consistent with suppressed vegetation growth following rainfall, due to high grazing pressure, where predators were rare. The landscape-scale analysis was supported by site-scale observations. Conclusions The influence of the trophic cascade was observable at both the landscape and site scales, suggesting that apex predator removal has significantly affected the arid ecosystem's responses to resource pulses. Analogous effects may exist across the large areas of the planet over which apex predators have been extirpated.
英文关键词	Dingo Kangaroo Grass cover Scale Dingo‐ proof fence Vegetation dynamics Landsat Fractional vegetation cover
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000617102300001
WOS类目	Ecology ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351093
作者单位	[Fisher, Adrian G.; Mills, Charlotte H.; Lyons, Mitchell; Cornwell, William K.; Letnic, Mike] Univ New South Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia; [Mills, Charlotte H.] Univ Reading, Sch Biol Sci, Reading, Berks, England
推荐引用方式 GB/T 7714	Fisher, Adrian G.,Mills, Charlotte H.,Lyons, Mitchell,et al. Remote sensing of trophic cascades: multi-temporal landsat imagery reveals vegetation change driven by the removal of an apex predator[J],2021,36(5):1341-1358.
APA	Fisher, Adrian G.,Mills, Charlotte H.,Lyons, Mitchell,Cornwell, William K.,&Letnic, Mike.(2021).Remote sensing of trophic cascades: multi-temporal landsat imagery reveals vegetation change driven by the removal of an apex predator.LANDSCAPE ECOLOGY,36(5),1341-1358.
MLA	Fisher, Adrian G.,et al."Remote sensing of trophic cascades: multi-temporal landsat imagery reveals vegetation change driven by the removal of an apex predator".LANDSCAPE ECOLOGY 36.5(2021):1341-1358.