干旱区生态环境知识资源中心(Arid): Water-Use Efficiency of Co-occurring Sky-Island Pine Species in the North American Great Basin

Arid

DOI	10.3389/fpls.2021.787297
	Water-Use Efficiency of Co-occurring Sky-Island Pine Species in the North American Great Basin
	Liu, Xinsheng; Ziaco, Emanuele; Biondi, Franco
通讯作者	Biondi, F (corresponding author), Univ Nevada, Dept Nat Resources & Environm Sci, DendroLab, Reno, NV 89557 USA.
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2021
卷号	12
英文摘要	Water-use efficiency (WUE), weighing the balance between plant transpiration and growth, is a key characteristic of ecosystem functioning and a component of tree drought resistance. Seasonal dynamics of tree-level WUE and its connections with drought variability have not been previously explored in sky-island montane forests. We investigated whole-tree transpiration and stem growth of bristlecone (Pinus longaeva) and limber pine (Pinus flexilis) within a high-elevation stand in central-eastern Nevada, United States, using sub-hourly measurements over 5 years (2013-2017). A moderate drought was generally observed early in the growing season, whereas interannual variability of summer rains determined drought levels between years, i.e., reducing drought stress in 2013-2014 while enhancing it in 2015-2017. Transpiration and basal area increment (BAI) of both pines were coupled throughout June-July, resulting in a high but relatively constant early season WUE. In contrast, both pines showed high interannual plasticity in late-season WUE, with a predominant role of stem growth in driving WUE. Overall, bristlecone pine was characterized by a lower WUE compared to limber pine. Dry or wet episodes in the late growing season overrode species differences. Our results suggested thresholds of vapor pressure deficit and soil moisture that would lead to opposite responses of WUE to late-season dry or wet conditions. These findings provide novel insights and clarify potential mechanisms modulating tree-level WUE in sky-island ecosystems of semi-arid regions, thereby helping land managers to design appropriate science-based strategies and reduce uncertainties associated with the impact of future climatic changes.
英文关键词	whole-tree transpiration bristlecone pine Pinus longaeva limber pine Pinus flexilis subalpine forests NevCAN
类型	Article
语种	英语
开放获取类型	Green Accepted, gold
收录类别	SCI-E
WOS记录号	WOS:000731014900001
WOS关键词	SAP FLOW ; HIGH-ELEVATION ; ENVIRONMENTAL CONTROLS ; CAMBIAL PHENOLOGY ; BRISTLECONE-PINE ; CARBON-DIOXIDE ; STEM GROWTH ; FOREST ; DROUGHT ; CLIMATE
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374109
作者单位	[Liu, Xinsheng] Anhui Normal Univ, Sch Geog & Tourism, Wuhu, Peoples R China; [Liu, Xinsheng; Biondi, Franco] Univ Nevada, Dept Nat Resources & Environm Sci, DendroLab, Reno, NV 89557 USA; [Liu, Xinsheng] Jiujiang Univ, Coll Tourism & Geog, Jiujiang, Peoples R China; [Ziaco, Emanuele] Uppsala Univ, Dept Ecol & Genet Plant Ecol & Evolut, Uppsala, Sweden
推荐引用方式 GB/T 7714	Liu, Xinsheng,Ziaco, Emanuele,Biondi, Franco. Water-Use Efficiency of Co-occurring Sky-Island Pine Species in the North American Great Basin[J],2021,12.
APA	Liu, Xinsheng,Ziaco, Emanuele,&Biondi, Franco.(2021).Water-Use Efficiency of Co-occurring Sky-Island Pine Species in the North American Great Basin.FRONTIERS IN PLANT SCIENCE,12.
MLA	Liu, Xinsheng,et al."Water-Use Efficiency of Co-occurring Sky-Island Pine Species in the North American Great Basin".FRONTIERS IN PLANT SCIENCE 12(2021).