干旱区生态环境知识资源中心(Arid): Shrub size modulates resource heterogeneity in a sagebrush-steppe ecosystem

Arid

DOI	10.3398/064.080.0104
	Shrub size modulates resource heterogeneity in a sagebrush-steppe ecosystem
	Liu, Lin 1; Veblen, Kari E.2,3; Monaco, Thomas A.4
通讯作者	Monaco, Thomas A.
来源期刊	WESTERN NORTH AMERICAN NATURALIST
ISSN	1527-0904
EISSN	1944-8341
出版年	2020
卷号	80 期号:1 页码:28-37
英文摘要	Shrubs create heterogeneity in resource availability, yet the influences of shrub age and size on these conditions in semiarid ecosystems is largely unknown. In order to inform restoration and conservation efforts in global shrub-steppe ecosystems that are currently imperiled, we assessed plant age-size relationships within an Artemisia tridentata stand in southern Idaho, USA, and examined the dependence of 2 resources, soil water content (SWC) and light at the soil surface (photosynthetically active radiation [PAR]), on size of individual plants in understory and interspace microsites. Results included a positive relationship between shrub age and size, a median shrub age of 19 years old, and shrub sizes that varied by more than 3 orders of magnitude (i.e., 0.001 m(3) to 1 m(3)). Across this broad range in stand structure, PAR was significantly lower in understory than in interspace microsites, and it declined slightly with increasing shrub volume. Similarly, SWC declined faintly with shrub volume, but understory and interspace microsites did not differ. These findings indicate that resource heterogeneity created by shrubs is potentially dependent on shrub size within this ecosystem, and that variation in stand structure directly influenced resource heterogeneity between understory and interspace microsites. We suggest that routine monitoring of heterogeneity in stand structure could serve as a valuable indicator to assess site suitability for restoration activities and to make quantitative comparisons among sites to prioritize conservation efforts.
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000529378400004
WOS关键词	WYOMING BIG SAGEBRUSH ; CRESTED WHEATGRASS ; SPATIAL-PATTERNS ; FERTILE ISLANDS ; SOIL NUTRIENTS ; MOJAVE DESERT ; AGE ; FIRE ; FACILITATION ; GROWTH
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318549
作者单位	1.Sichuan Agr Univ, Anim Sci & Technol Coll, Dept Grassland Sci, Chengdu, Sichuan, Peoples R China; 2.Utah State Univ, Dept Wildland Resources, Logan, UT 84322 USA; 3.Utah State Univ, Ecol Ctr, Logan, UT 84322 USA; 4.Utah State Univ, ARS, USDA, Forage & Range Res Lab, Logan, UT 84322 USA
推荐引用方式 GB/T 7714	Liu, Lin,Veblen, Kari E.,Monaco, Thomas A.. Shrub size modulates resource heterogeneity in a sagebrush-steppe ecosystem[J],2020,80(1):28-37.
APA	Liu, Lin,Veblen, Kari E.,&Monaco, Thomas A..(2020).Shrub size modulates resource heterogeneity in a sagebrush-steppe ecosystem.WESTERN NORTH AMERICAN NATURALIST,80(1),28-37.
MLA	Liu, Lin,et al."Shrub size modulates resource heterogeneity in a sagebrush-steppe ecosystem".WESTERN NORTH AMERICAN NATURALIST 80.1(2020):28-37.