Arid
DOI10.1016/j.jaridenv.2018.03.004
Shrub cover and fire history predict seed bank composition in Great Basin shrublands
Barga, Sarah; Leger, Elizabeth A.
通讯作者Barga, Sarah
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
出版年2018
卷号154页码:40-50
英文摘要

Dormant seeds in the soil are an important contribution to the regenerative potential of an area. Understanding factors that affect seed bank dynamics in arid regions provides insight into how communities respond to disturbance and environmental change. We characterized seed banks in a Great Basin sagebrush steppe system, using field surveys and seed bank studies to compare 17 sites that differed in above-ground vegetation, fire history, and grazing use. We asked whether shrub cover, ground cover, climate, or disturbance history were predictive of seed densities, diversity, the presence of rare species, and similarity between above- and below-ground communities. Fire frequency and a coarse measure of grazing use were not highly predictive of seed bank dynamics, with the exception that sites that burned <10 years ago had greater above-vs. below-ground similarity. Shrub cover predicted multiple below-ground characteristics: Ericameria nauseosa was associated with increased density of introduced species, Chrysothamw viscidiflorus was associated with increased densities of native annual species, and Artemisia tridentata was associated with increased richness of rare native species. Shrub cover estimates were predictive of seed bank composition, and suggest that areas dominated by A. tridentata would have the greatest restoration potential within their seed banks.


英文关键词Great Basin Disturbance Restoration Cold desert Succession Diversity
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000432764800006
WOS关键词PLANT COMMUNITY ; BIG SAGEBRUSH ; ALIEN PLANTS ; DESERT ; VEGETATION ; DYNAMICS ; RESTORATION ; GERMINATION ; SIMILARITY ; GRASSLAND
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/210561
作者单位Univ Nevada, Dept Nat Resources & Environm Sci, Mail Stop 186,1664 N Virginia St, Reno, NV 89557 USA
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GB/T 7714
Barga, Sarah,Leger, Elizabeth A.. Shrub cover and fire history predict seed bank composition in Great Basin shrublands[J],2018,154:40-50.
APA Barga, Sarah,&Leger, Elizabeth A..(2018).Shrub cover and fire history predict seed bank composition in Great Basin shrublands.JOURNAL OF ARID ENVIRONMENTS,154,40-50.
MLA Barga, Sarah,et al."Shrub cover and fire history predict seed bank composition in Great Basin shrublands".JOURNAL OF ARID ENVIRONMENTS 154(2018):40-50.
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