干旱区生态环境知识资源中心(Arid): Using remote sensing to quantify ecosystem site potential community structure and deviation in the Great Basin, United States

Arid

DOI	10.1016/j.ecolind.2018.09.037
	Using remote sensing to quantify ecosystem site potential community structure and deviation in the Great Basin, United States
	Rigge, Matthew 1; Homer, Collin 2; Wylie, Bruce 2; Gu, Yingxin 1; Shi, Hua 1; Xian, George 2; Meyer, Debra K.3; Bunde, Brett 3
通讯作者	Rigge, Matthew
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2019
卷号	96 页码:516-531
英文摘要	The semi-arid Great Basin region in the Northwest U.S. is impacted by a suite of change agents including fire, grazing, and climate variability to which native vegetation can have low resilience and resistance. Assessing ecosystem condition in relation to these change agents is difficult due to a lack of a consistent and objective Site Potential (SP) information of the conditions biophysically possible at each site. Our objectives were to assess and quantify patterns in ecosystem condition, based on actual fractional component cover and a SP map and to evaluate drivers of change. We used long-term 90th percentile Landsat NDVI (Normalized Difference Vegetation Index) and biophysical variables to produce a map of SP. Ecosystem condition was assessed using two methods, first we integrated fractional components into an index which was regressed against SP. Regression confidence intervals were used to segment the study area into normal, over-, and under-performing relative to SP. Next, the relationships between SP and fractional component cover produced SP expected component cover, from which we mapped the actual cover deviation. Much of the study area is within the range of conditions expected by the SP model, but degraded conditions are more common than those above SP expectations. We found that shrub cover deviation is more positive at higher elevation, while herbaceous cover deviation has the opposite pattern, supporting the hypothesis that more resistant and resilient sites are less likely to change from the shrub dominated legacy. Another key finding was that regions with significant annual herbaceous invasions tend to have lower than expected bare ground and shrub cover.
英文关键词	Remote sensing Landsat Site potential Great Basin Land health Fractional cover
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000464889600051
WOS关键词	COLD DESERT SHRUBLANDS ; TRANSITION MODELS ; SAGEBRUSH ; RANGELANDS ; RESILIENCE ; MANAGEMENT ; RESISTANCE ; SOIL
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215186
作者单位	1.US Geol Survey, InuTeq, Earth Resources Observat & Sci Ctr, Sioux Falls, SD 57198 USA; 2.US Geol Survey, Earth Resources Observat & Sci Ctr, Sioux Falls, SD 57198 USA; 3.SGT USGS Earth Resources Observat & Sci Ctr, Sioux Falls, SD 57198 USA
推荐引用方式 GB/T 7714	Rigge, Matthew,Homer, Collin,Wylie, Bruce,et al. Using remote sensing to quantify ecosystem site potential community structure and deviation in the Great Basin, United States[J]. United States Geological Survey,2019,96:516-531.
APA	Rigge, Matthew.,Homer, Collin.,Wylie, Bruce.,Gu, Yingxin.,Shi, Hua.,...&Bunde, Brett.(2019).Using remote sensing to quantify ecosystem site potential community structure and deviation in the Great Basin, United States.ECOLOGICAL INDICATORS,96,516-531.
MLA	Rigge, Matthew,et al."Using remote sensing to quantify ecosystem site potential community structure and deviation in the Great Basin, United States".ECOLOGICAL INDICATORS 96(2019):516-531.