Enhanced photosynthetic capacity by perennials in the riparian zone of the Three Gorges Reservoir Area, China

doi:10.1016/j.ecoleng.2016.01.075

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	Enhanced photosynthetic capacity by perennials in the riparian zone of the Three Gorges Reservoir Area, China
	Zhang, Aiying 1; Fan, Dayong ; Li, Zhaojia 1; Xiong, Gaoming ; Xie, Zongqiang
刊名	ECOLOGICAL ENGINEERING
	2016
卷号	90 页码:6-11
关键词	Leaf traits Leaf nitrogen concentration Sink-source Stem mass ratio Photosynthetic capacity
ISSN号	0925-8574
DOI	10.1016/j.ecoleng.2016.01.075
文献子类	Article
英文摘要	The flood-dry-flood cycle in the reservoir riparian zone (RRZ) of the Three Gorges Dam has dramatically changed the ecosystem structure and riparian vegetation. Previous field investigations have shown that perennial herbaceous species are dominant in the riparian zone. However, how perennials respond to flooding disturbance remains largely unclear. Intermediate disturbance (e.g. grazing, insect pest) can enhance photosynthesis via physiological compensation mechanism. The aim of this study is to investigate whether perennials enhance their photosynthetic capacity during dry periods and understand the mechanisms driving this. Eight species from different families in a RRZ site and a paired Upland site were chosen. We compared 12 plant traits including photosynthesis, leaf structure and nutrients, as well as soluble sugar (indicate sink-source relationship) between the two sites. Results showed that perennials in RRZ had a significant higher area-based photosynthetic capacity (A(area)) than those in Upland. Meanwhile, stomatal conductance (G(s)), leaf nitrogen concentration (LNCa) and Stem mass ratio (SMR) were also significantly higher in RRZ than Upland individuals. However, there was no sign of an unbalanced sink-source relationship in RRZ as evidenced by no difference in soluble sugar content in roots and stems between sites. The results of this study suggest that perennials have enhanced photosynthetic capacity in RRZ mainly attributed to higher LNCa and Gs but sink strength was not enhanced. These data provide insight into the ecosystem functioning of riparian areas and could be used to improve restoration practices. (C) 2016 Elsevier B.V. All rights reserved.
学科主题	Ecology ; Engineering, Environmental ; Environmental Sciences
电子版国际标准刊号	1872-6992
出版地	AMSTERDAM
WOS关键词	CHLOROPHYLL FLUORESCENCE ; LEAF TRAITS ; PLANT ; GROWTH ; VEGETATION ; RESPONSES ; CO2 ; SUBMERGENCE ; LIGHT ; CONDUCTANCE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000373376700002
资助机构	Chinese Academy of SciencesChinese Academy of Sciences [KZCX2-XB3-09]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25190]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Aiying,Fan, Dayong,Li, Zhaojia,et al. Enhanced photosynthetic capacity by perennials in the riparian zone of the Three Gorges Reservoir Area, China[J]. ECOLOGICAL ENGINEERING,2016,90:6-11.
APA	Zhang, Aiying,Fan, Dayong,Li, Zhaojia,Xiong, Gaoming,&Xie, Zongqiang.(2016).Enhanced photosynthetic capacity by perennials in the riparian zone of the Three Gorges Reservoir Area, China.ECOLOGICAL ENGINEERING,90,6-11.
MLA	Zhang, Aiying,et al."Enhanced photosynthetic capacity by perennials in the riparian zone of the Three Gorges Reservoir Area, China".ECOLOGICAL ENGINEERING 90(2016):6-11.