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首页> 外文期刊>Aquatic Conservation: Marine and Freshwater Ecosystems >Response of the riverine fish community to the construction and operation of a diversion hydropower plant in central Chile.
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Response of the riverine fish community to the construction and operation of a diversion hydropower plant in central Chile.

机译：沿河鱼类社区对智利中部一处引水工程的建设和运营的反应。

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摘要

Chilean rivers have a large potential for hydropower development, and they also contain a unique native fish fauna with a high level of endemism. Several diversion hydropower plants have recently been constructed in Chile; however, the response of fish communities to these new hydropower plant designs is not well known. Responses of native and non-native fish to the construction and operation of a new hydropower plant that diverts water from two rivers were quantified. The Laja River is highly regulated and manipulated with three older (40 yr) dam-based hydropower plants and irrigation diversions located upstream from the new facility. In contrast, the Rucue River has no other hydropower facilities and is comparatively undisturbed. Prior to construction, the Laja River had a fish community with lower species richness compared with the Rucue River. The fish community structure in the Laja River was dramatically altered after the new hydropower facility began operation. On the other hand, in the Rucue River, even though abundance of fish declined, there was less of a change in the total fish community structure. The fish community in the Rucue River exhibited greater resistance to change compared with the Laja River. The species most affected were the introduced salmonids and an endangered native species Percilia irwini. Although diversion hydropower designs may have less impact than traditional dam-based hydropower facilities, results of this study indicate that diversion hydropower structures can cause large changes in the fish community..
机译：智利河流具有巨大的水电开发潜力，并且它们还蕴藏着独特的本地鱼类，具有很高的地方性。智利最近建造了几座引水电站。然而，鱼群对这些新的水力发电厂设计的反应尚不清楚。量化了本地和非本地鱼类对建造和运行新的水力发电厂的反应，该水力发电厂从两条河中引水。拉贾河受到高度管制和操纵，这是由三个旧的（40年）大坝水力发电厂和位于新设施上游的灌溉引水渠组成的。相反，Rucue河没有其他水力发电设施，相对不受干扰。与拉库河相比，拉贾河在建造之前的鱼类群落物种丰富度较低。新水力发电站开始运营后，拉贾河的鱼类群落结构发生了巨大变化。另一方面，在Rucue河中，尽管鱼的数量减少了，但总鱼类群落结构的变化却很少。与拉贾河相比，Rucue河的鱼类群落对变化的抵抗力更大。受灾最严重的物种是引进的鲑鱼和濒临灭绝的本地物种Percilia irwini。尽管分流水电设计的影响可能不如传统的基于大坝的水电设施，但这项研究的结果表明，分流水电结构可能导致鱼类群落的巨大变化。

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