The Effects of Run-of-River Hydroelectric Power Schemes on Fish Community Composition in Temperate Streams and Rivers.
The Effects of Run-of-River Hydroelectric Power Schemes on Fish Community Composition in Temperate Streams and Rivers.
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DOI：
10.1371/journal.pone.0154271
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Orr HG
中科院分区：
文献类型：
--
作者：
Bilotta GS;Burnside NG;Gray JC;Orr HG
大型蓄水式水力发电（HEP）计划的潜在环境影响已在文献中有详细记载。在欧洲，对这些潜在影响的认识以及政治上可接受的中大型计划的有限机会，引起了人们对小型 HEP 计划的关注，特别是径流式 (ROR) 计划，以帮助实现可再生能源目标。通常认为径流式 HEP 方案对环境的破坏比大规模存储 HEP 方案要小。然而，目前缺乏对其物理和生态影响的同行评审研究。本文的目的是采用前后控制影响 (BACI) 研究设计，调查 ROR HEP 方案对温带溪流和河流鱼类群落的影响。该研究利用了在 23 个系统选择的 ROR HEP 计划和 23 个系统选择的配对控制点中收集的常规环境监测数据，这些数据是长期国家和国际监测计划的一部分。使用线性混合效应模型分析了鱼类群落组成的六个面积归一化指标（物种数量、鱼类数量、大西洋鲑鱼数量（Salmo salar）、> 1 年龄大西洋鲑鱼数量、褐鳟鱼数量 - Salmo trutta 和> 1 年龄褐鳟鱼数量）。分析表明，ROR HEP 建设和运行对物种数量具有统计显着性影响（p<0.05）。然而，没有检测到对社区组成的其他五个指标有统计上的显着影响。本文讨论了这些发现的含义，并为未来鱼类群落影响研究的最佳实践研究设计提出了建议。
The potential environmental impacts of large-scale storage hydroelectric power (HEP) schemes have been well-documented in the literature. In Europe, awareness of these potential impacts and limited opportunities for politically-acceptable medium- to large-scale schemes, have caused attention to focus on smaller-scale HEP schemes, particularly run-of-river (ROR) schemes, to contribute to meeting renewable energy targets. Run-of-river HEP schemes are often presumed to be less environmentally damaging than large-scale storage HEP schemes. However, there is currently a lack of peer-reviewed studies on their physical and ecological impact. The aim of this article was to investigate the effects of ROR HEP schemes on communities of fish in temperate streams and rivers, using a Before-After, Control-Impact (BACI) study design. The study makes use of routine environmental surveillance data collected as part of long-term national and international monitoring programmes at 23 systematically-selected ROR HEP schemes and 23 systematically-selected paired control sites. Six area-normalised metrics of fish community composition were analysed using a linear mixed effects model (number of species, number of fish, number of Atlantic salmon—Salmo salar, number of >1 year old Atlantic salmon, number of brown trout—Salmo trutta, and number of >1 year old brown trout). The analyses showed that there was a statistically significant effect (p<0.05) of ROR HEP construction and operation on the number of species. However, no statistically significant effects were detected on the other five metrics of community composition. The implications of these findings are discussed in this article and recommendations are made for best-practice study design for future fish community impact studies.