A transitional region concept for assessing the effects of reservoirs on river habitats: a case of Yangtze River, China
A transitional region concept for assessing the effects of reservoirs on river habitats: a case of Yangtze River, China
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DOI：
10.1002/eco.186
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发表时间：
2012-01
期刊：
影响因子：
2.6
通讯作者：
Yuankun Wang;Z. Xia;Dong Wang
中科院分区：
文献类型：
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作者：
Yuankun Wang;Z. Xia;Dong Wang
大坝建设通过改变水文状况和连通性对河流生态系统产生负面影响。河流连续体理论提供了一个有用的框架，考虑具体的影响，河流系统的生态水文大坝。本研究提出了一个过渡区的概念，用于分析水坝建设引起的水文变化的性质，以及这些变化与鱼类的生活史和生态的关系。河流生态系统的过渡区被细分为一个四维框架。该框架由空间结构、物质结构、能量结构和水文过程组成。定量地评估了长江大坝建设对这一框架的影响。以位于河流生态系统惯性带的中华鲟产卵场为研究区。利用现状和历史水文资料，分析了建坝对长江中华鲟产卵场的影响。结果表明，三峡水库对中华鲟产卵场的适宜性有显著影响。这也可能会影响猎物/捕食者物种动态和鲟鱼种群，特别是在长江下游。本研究结果可提供决策者及河流管理者重要的考量，以保护中华鲟免受三峡库区的不利影响。版权所有© 2010约翰威利父子有限公司.
Dam constructions negatively impact river ecosystems by altering hydrologic regimes and connectivities. River continuum theory provides a useful framework for considering the specific influences of dams on the ecohydrology of river systems. This study presents a Transitional Region Concept for analysing the nature of hydrologic changes resulting from dam constructions and how these changes relate to the life history and ecology of the fish. The stream ecosystem of the transitional region is subdivided into a four‐dimensional framework. The framework consists of spatial structure, matter structure, energy structure, and hydrological process. The characteristics and variations in this framework, as affected by dam construction on the Yangtze River, are quantitatively assessed. The spawning ground of the Chinese Sturgeon (Acipenser sinensis), located in inertial zone of the river ecosystem, is used as the study site. Current and historical hydrological data are used to determine the effects of dam construction on the spawning grounds of Chinese Sturgeon in the river. The results show that the Three Gorges Reservoir (TGR) has a significant impact on the suitability of the spawning grounds of Chinese Sturgeon. This could also affect the prey/predator species dynamics and the sturgeon fish population in especially the lower reaches of the Yangtze River. The findings of this study could provide critical considerations for policy makers and river managers to protect Chinese Sturgeon from the adverse effects of the TGR. Copyright © 2010 John Wiley & Sons, Ltd.