干旱区生态环境知识资源中心(Arid): Intraspecific variation in surface water uptake in a perennial desert shrub

Arid

DOI	10.1111/1365-2435.13546
	Intraspecific variation in surface water uptake in a perennial desert shrub
	Zaiats, Andrii 1; Lazarus, Brynne E.2; Germino, Matthew J.2; Serpe, Marcelo D.1; Richardson, Bryce A.3; Buerki, Sven 1; Caughlin, T. Trevor 1
通讯作者	Zaiats, Andrii
来源期刊	FUNCTIONAL ECOLOGY
ISSN	0269-8463
EISSN	1365-2435
出版年	2020
卷号	34 期号:6 页码:1170-1179
英文摘要	Despite broad recognition that water is a major limiting factor in arid ecosystems, we lack an empirical understanding of how this resource is shared and distributed among neighbouring plants. Intraspecific variability can further contribute to this variation via divergent life-history traits, including root architecture. We investigated these questions in the shrub Artemisia tridentata and hypothesized that the ability to access and utilize surface water varies among subspecies and cytotypes. We used an isotope tracer to quantify below-ground zone of influence in A. tridentata, and tested whether spatial neighbourhood characteristics can alter plant water uptake. We introduced deuterium-enriched water to the soil in plant interspaces in a common garden experiment and measured deuterium composition of plant stems. We then applied spatially explicit models to test for differential water uptake by A. tridentata, including intermingled populations of three subspecies and two ploidy levels. The results suggest that lateral root functioning in A. tridentata is associated with intraspecific identity and ploidy level. Subspecies adapted to habitats with deep soils generally had a smaller horizontal reach, and polyploid cytotypes were associated with greater water uptake compared to their diploid variants. We also found that plant crown volume was a weak predictor of water uptake, and that neighbourhood crowding had no discernable effect on water uptake. Intraspecific variation in lateral root functioning can lead to differential patterns of resource acquisition, an essential process in arid ecosystems in the contexts of changing climate and seasonal patterns of precipitation. Altogether, we found that lateral root development and activity are more strongly related to genetic variability within A. tridentata than to plant size. Our study highlights how intraspecific variation in life strategies is linked to mechanisms of resource acquisition. A free Plain Language Summary can be found within the Supporting Information of this article.
英文关键词	Artemisia tridentata (big sagebrush) below-ground interactions deuterium tracer intraspecific variation lateral roots resource competition surface water uptake
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000538684400004
WOS关键词	ARTEMISIA-TRIDENTATA ; SOIL-WATER ; BIG SAGEBRUSH ; SUMMER PRECIPITATION ; GROWTH-RESPONSES ; PLOIDY LEVEL ; PLANT ; COMPETITION ; DROUGHT ; PHOTOSYNTHESIS
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	United States Geological Survey ; E18
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318699
作者单位	1.Boise State Univ, Dept Biol Sci, Boise, ID 83725 USA; 2.US Geol Survey, Forest & Rangeland Ecosyst Sci Ctr, Boise, ID USA; 3.US Forest Serv, USDA, Rocky Mt Res Stn, Moscow, ID USA
推荐引用方式 GB/T 7714	Zaiats, Andrii,Lazarus, Brynne E.,Germino, Matthew J.,et al. Intraspecific variation in surface water uptake in a perennial desert shrub[J]. United States Geological Survey, E18,2020,34(6):1170-1179.
APA	Zaiats, Andrii.,Lazarus, Brynne E..,Germino, Matthew J..,Serpe, Marcelo D..,Richardson, Bryce A..,...&Caughlin, T. Trevor.(2020).Intraspecific variation in surface water uptake in a perennial desert shrub.FUNCTIONAL ECOLOGY,34(6),1170-1179.
MLA	Zaiats, Andrii,et al."Intraspecific variation in surface water uptake in a perennial desert shrub".FUNCTIONAL ECOLOGY 34.6(2020):1170-1179.