Arid
DOI10.1111/j.1366-9516.2006.00253.x
Multiscale responses of soil stability and invasive plants to removal of non-native grazers from an arid conservation reserve
Beever, EA; Huso, M; Pyke, DA
通讯作者Beever, EA
来源期刊DIVERSITY AND DISTRIBUTIONS
ISSN1366-9516
出版年2006
卷号12期号:3页码:258-268
英文摘要

Disturbances and ecosystem recovery from disturbance both involve numerous processes that operate on multiple spatial and temporal scales. Few studies have investigated how gradients of disturbance intensity and ecosystem responses are distributed across multiple spatial resolutions and also how this relationship changes through time during recovery. We investigated how cover of non-native species and soil-aggregate stability (a measure of vulnerability to erosion by water) in surface and subsurface soils varied spatially during grazing by burros and cattle and whether patterns in these variables changed after grazer removal from Mojave National Preserve, California, USA. We compared distance from water and number of ungulate defecations - metrics of longer-term and recent grazing intensity, respectively, - as predictors of our response variables. We used information-theoretic analyses to compare hierarchical linear models that accounted for important covariates and allowed for interannual variation in the disturbance-response relationship at local and landscape scales. Soil stability was greater under perennial vegetation than in bare interspaces, and surface soil stability decreased with increasing numbers of ungulate defecations. Stability of surface samples was more affected by time since removal of grazers than was stability of subsurface samples, and subsurface soil stability in bare spaces was not related to grazing intensity, time since removal, or any of our other predictors. In the high rainfall year (2003) after cattle had been removed for 1-2 years, cover of all non-native plants averaged nine times higher than in the low-rainfall year (2002). Given the heterogeneity in distribution of large-herbivore impacts that we observed at several resolutions, hierarchical analyses provided a more complete understanding of the spatial and temporal complexities of disturbance and recovery processes in arid ecosystems.


英文关键词biological invasions California herbivory hierarchical linear models information-theoretic analyses soil-aggregate stability non-native plants Mojave Desert Schismus barbatus
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000237095500004
WOS关键词SPATIAL HETEROGENEITY ; GRAZING SYSTEMS ; STABLE STATES ; MOJAVE DESERT ; NEW-MEXICO ; RESTORATION ; DIVERSITY ; POPULATIONS ; GRASSLANDS ; RANGELANDS
WOS类目Biodiversity Conservation ; Ecology
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/2XILL650/151181
作者单位(1)Oregon State Univ, Dept Forest Sci, Corvallis, OR 97331 USA;(2)USGS, Forest & Rangeland Ecosyst Sci Ctr, Corvallis, OR 97331 USA
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Beever, EA,Huso, M,Pyke, DA. Multiscale responses of soil stability and invasive plants to removal of non-native grazers from an arid conservation reserve[J]. United States Geological Survey,2006,12(3):258-268.
APA Beever, EA,Huso, M,&Pyke, DA.(2006).Multiscale responses of soil stability and invasive plants to removal of non-native grazers from an arid conservation reserve.DIVERSITY AND DISTRIBUTIONS,12(3),258-268.
MLA Beever, EA,et al."Multiscale responses of soil stability and invasive plants to removal of non-native grazers from an arid conservation reserve".DIVERSITY AND DISTRIBUTIONS 12.3(2006):258-268.
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