干旱区生态环境知识资源中心(Arid): Competition between Populus euphratica and Tamarix ramosissima seedlings under simulated high groundwater availability

Arid

	Competition between Populus euphratica and Tamarix ramosissima seedlings under simulated high groundwater availability
	Wu Guilin; Jiang Shaowei; Liu Weiyang; Zhao Chengyi; Li Jun
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2016
卷号	8 期号:2 页码:293-303
英文摘要	Desert riparian plants experience high variability in water availability due to hydrological fluctuations. How riparian plants can survive with low water availability has been well studied, however, little is known about the effects of high water availability on plant community structuring. We conducted a mesocosm experiment to test whether seedling competition under simulated high groundwater availability can explain the shift of co-dominance of Populus euphratica and Tamarix ramosissima in early communities to P. euphratica dominance in mature ones along the Tarim River in northwestern China. Seedlings of these two plant species were grown in monoculture and mixture pools with high groundwater availability. Results indicated that the above-ground biomass and relative yield of T. ramosissima were higher than those of P. euphratica. The competitive advantages of T. ramosissima included its rapid response in growth to groundwater enrichment and its water spender strategy, as evidenced by the increased leaf biomass proportion and the inert stomatal response to leaf-to-air vapor pressure deficit (VPD). In comparison, P. euphratica showed a conservative strategy in water use, with a sensitive response to leaf-to-air VPD. Result of the short-term competition was inconsistent with the long-term competition in fields, suggesting that competition exclusion is not the mechanism structuring the desert riparian plant communities. Thus, our research highlights the importance of mediation by environmental fluctuations (such as lessening competition induced by disturbance) in structuring plant communities along the Tarim riparian zones.
英文关键词	community succession vapor pressure deficit (VPD) stomatal conductance riparian plant water use strategy
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5626819
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335612
作者单位	Wu Guilin, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Jiang Shaowei, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Zhao Chengyi, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Li Jun, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Liu Weiyang, College of Plant Science, Tarim University, Alar, 843300.
推荐引用方式 GB/T 7714	Wu Guilin,Jiang Shaowei,Liu Weiyang,et al. Competition between Populus euphratica and Tamarix ramosissima seedlings under simulated high groundwater availability[J],2016,8(2):293-303.
APA	Wu Guilin,Jiang Shaowei,Liu Weiyang,Zhao Chengyi,&Li Jun.(2016).Competition between Populus euphratica and Tamarix ramosissima seedlings under simulated high groundwater availability.Journal of Arid Land,8(2),293-303.
MLA	Wu Guilin,et al."Competition between Populus euphratica and Tamarix ramosissima seedlings under simulated high groundwater availability".Journal of Arid Land 8.2(2016):293-303.