Assessing the effect of Separation Levee Project on Chinese sturgeon (Acipensor sinensis) spawning habitat suitability in Yangtze River, China
Assessing the effect of Separation Levee Project on Chinese sturgeon (Acipensor sinensis) spawning habitat suitability in Yangtze River, China
复制标题
评估隔离堤工程对中国长江中华鲟产卵栖息地适宜性的影响
DOI：
10.1007/s10452-011-9351-2
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发表时间：
2011-02
期刊：
影响因子：
1.8
通讯作者：
Wang, Dong
中科院分区：
文献类型：
--
作者：
Wang, Yuankun;Xia, Ziqiang;Wang, Dong
中华鲟（Acipenser sinensis）是一种受保护的溯河产卵鱼类。由于葛洲坝工程的修建，长江白鲟的洄游路线被阻断，使长江沿岸天然产卵场长度减少到沿着7公里以内。然而，这种鱼已经在葛洲坝下游狭窄的河段建立了另一个产卵场。为加强航行，在新发现的鱼类产卵栖息地实施了隔离堤项目。因此，评估SLP对中华鲟产卵栖息地适宜性的影响，在产卵栖息地的条件进行了模拟使用River2D（一个二维水动力学模型）。两个主要的方法（栖息地动能和循环指标）在模拟中使用。研究表明，SLP仅轻微改变产卵栖息地的物理条件。利用水动力学模拟，计算了SLP建设前后的加权可用面积（WUA），并绘制了水深和流速的栖息地偏好曲线。平均而言，SLP减少WUA的发现是一致的实地测量数据。基于WUA，栖息地条件比基于速度梯度的指标对SLP接近度更敏感。SLP对中华鲟产卵栖息地的适宜性产生不利影响。研究结果为长江下游中华鲟产卵场的保护与恢复提供了依据。
Chinese sturgeon (Acipenser sinensis) is a protected anadromous fish species. The migration pattern of the fish has been blocked by the construction of Gezhouba Dam, reducing the natural spawning site length to less than 7 km along the Yangtze River. However, the fish has since established an alternative spawning ground in the narrow reach downstream of Gezhouba Dam. To enhance navigation, a Separation Levee Project (SLP) was implemented in the new-found spawning habitat of the fish. To therefore evaluate the effect of the SLP on Chinese sturgeon spawning habitat suitability, the conditions in the spawning habitat were simulated using River2D (a two-dimensional hydrodynamic model). Two main approaches (habitat kinetic energy and circulation metrics) were used in the simulation. The study showed that SLP only slightly changed the physical conditions in the spawning habitat. Using hydrodynamic simulation, the weighted usable area (WUA) before and after the SLP construction was also computed and habitat preference curve developed for water depth and velocity. On the average, SLP reduced WUA—a finding that was consistent with field-measured data. Based on WUA, the habitat conditions were more sensitive to SLP proximity than metrics based on velocity gradients. SLP posed detrimental impacts on the suitability of spawning habitats of Chinese sturgeon. The findings in this study provide further basis for the protection and restoration of Chinese sturgeon spawning habitats in especially the lower reach of Yangtze River.
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影响因子：
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DOI：
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