Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/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
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ISSN | 1366-9516 |
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 |
推荐引用方式 GB/T 7714 | 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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