干旱区生态环境知识资源中心(Arid): Landsat Time Series Assessment of Invasive Annual Grasses Following Energy Development

Arid

DOI	10.3390/rs11212553
	Landsat Time Series Assessment of Invasive Annual Grasses Following Energy Development
	Villarreal, Miguel L.1; Soulard, Christopher E.1; Waller, Eric K.2
通讯作者	Villarreal, Miguel L.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2019
卷号	11 期号:21
英文摘要	Invasive annual grasses are of concern in much of the western United States because they tolerate resource variability and have high reproductive capacity, with propagules that are readily dispersed in disturbed areas like those created and maintained for energy development. Early season invasive grasses green up earlier than most native plants, producing a distinct pulse of greenness in the early spring that can be exploited to identify their location using multi-date imagery. To determine if invasive annual grasses increased around energy developments after the construction phase, we calculated an invasives index using Landsat TM and ETM+ imagery for a 34-year time period (1985-2018) and assessed trends for 1755 wind turbines installed between 1988 and 2013 in the southern California desert. The index uses the maximum Normalized Difference Vegetation Index (NDVI) for early season greenness (January-June), and mean NDVI (July-October) for the later dry season. We estimated the relative cover of invasive annuals each year at turbine locations and control sites and tested for changes before and after each turbine was installed. The time series was also mapped across the region and temporal trends were assessed relative to seasonal precipitation. The results showed an increase in early season invasives at turbine sites after installation, but also an increase in many of the surrounding control areas. Maps of the invasive index show a region-wide increase starting around 1998, and much of the increase occurred in areas surrounding wind development sites. These results suggest that invasions around the energy developments occurred within the context of a larger regional invasion, and while the development did not necessarily initiate the invasion, annual grasses were more prevalent around the developments.
英文关键词	exotic species Bromus tectorum energy development time series Landsat Google Earth Engine NDVI
类型	Article
语种	英语
国家	USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000504716700094
WOS关键词	MOJAVE DESERT ; BROMUS-TECTORUM ; COVER CHANGE ; COMMUNITY COMPOSITION ; GAS DEVELOPMENT ; SONORAN DESERT ; FIRE ; OIL ; CHEATGRASS ; VEGETATION
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
EI主题词	2019-11-01
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/2XILL650/310566
作者单位	1.US Geol Survey, Western Geog Sci Ctr, POB 158, Moffett Field, CA 94035 USA; 2.Independent Contractor, Oakland, CA 94609 USA
推荐引用方式 GB/T 7714	Villarreal, Miguel L.,Soulard, Christopher E.,Waller, Eric K.. Landsat Time Series Assessment of Invasive Annual Grasses Following Energy Development[J]. United States Geological Survey,2019,11(21).
APA	Villarreal, Miguel L.,Soulard, Christopher E.,&Waller, Eric K..(2019).Landsat Time Series Assessment of Invasive Annual Grasses Following Energy Development.REMOTE SENSING,11(21).
MLA	Villarreal, Miguel L.,et al."Landsat Time Series Assessment of Invasive Annual Grasses Following Energy Development".REMOTE SENSING 11.21(2019).