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Salmon study sparks row over dams

机译:鲑鱼研究引发大坝争吵

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Research that argues dams have no direct effect on the migration of juvenile salmon is roiling waters in the US Pacific Northwest. The study, published this week in PLoS Biology, uses a new way to tag fish to compare the heavily dammed Columbia River system with the free-flowing Fraser River to the north in British Columbia, Canada. After hatching upriver, salmon smolts fared equally well on their journeys down the two rivers to the ocean. But that's where the agreement ends. Salmon migration remains at the heart of an ongoing court battle, which pits environmentalists who want to see some of the dams removed against federal agencies charged with maintaining the dams, providing power and protecting salmon. Thirty-one federal dams on the Columbia River and its tributaries collectively provide some 60% of the regions electricity. The Bonneville Power Administration, based in Portland, Oregon, has spent billions of dollars making the dams more friendly for fish, and the latest plan, issued on 5 May, proposes further modifications to dam operations. Taken at face value, the new research might suggest that the investment is paying off and that other factors are suppressing the 13 salmon populations protected under the Endangered Species Act.
机译:有研究认为,水坝对美国太平洋西北部泛滥的未成年鲑鱼的迁移没有直接影响。这项研究于本周发表在《公共科学图书馆·生物学》(PLoS Biology)上,它使用一种新的标记鱼的方法,将遭受重灾的哥伦比亚河系统与加拿大不列颠哥伦比亚省北部的自由流动的弗雷泽河进行了比较。孵化上游后,鲑鱼在两条河流到大海的旅程中同样表现良好。但这就是协议结束的地方。鲑鱼迁移仍然是正在进行的法庭斗争的核心,环保主义者希望看到一些水坝被移交给负责维护水坝,提供电力和保护鲑鱼的联邦机构。哥伦比亚河及其支流上的三十一个联邦水坝总共为该地区提供了60%的电力。位于俄勒冈州波特兰市的邦纳维尔电力管理局(Bonneville Power Administration)花费了数十亿美元,使水坝对鱼类更加友好,5月5日发布的最新计划提出了对水坝运营进行进一步修改的提议。从表面上看,这项新研究可能表明投资正在获得回报,其他因素正在压制受《濒危物种法》保护的13个鲑鱼种群。

著录项

  • 来源
    《Nature》 |2008年第7217期|p.1160|共1页
  • 作者

    Jeff Tollefson;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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