Dams and Fish Migration
نویسنده
چکیده
منابع مشابه
Effects of Small Dams on Cold Water Stream Fish Communities
—Dams provide many benefits to society, yet they have profound impacts on aquatic ecosystems. In addition to blocking fish migration, small surface-release dams on coldwater streams generally increase water temperature below the dam. The goal of this study was to evaluate how small, surface-release dams affect fish communities, separating the total effect into components related to fragmentatio...
متن کاملTrading-off fish biodiversity, food security, and hydropower in the Mekong River Basin.
The Mekong River Basin, site of the biggest inland fishery in the world, is undergoing massive hydropower development. Planned dams will block critical fish migration routes between the river's downstream floodplains and upstream tributaries. Here we estimate fish biomass and biodiversity losses in numerous damming scenarios using a simple ecological model of fish migration. Our framework allow...
متن کاملDam choices: analyses for multiple needs.
E nvironmentalists often go to great lengths to block the construction of new dams because dams interfere with fish migration, inundate terrestrial habitats, and interrupt natural flows that are necessary for critical ecosystem processes. However, few environmental issues are so simplistically black and white, and dams are no exception. Dams can be an important source of clean energy and for po...
متن کاملSurvival of Atlantic salmon Salmo salar smolts through a hydropower complex.
This study evaluated Atlantic salmon Salmo salar smolt survival through the lower Penobscot River, Maine, U.S.A., and characterized relative differences in proportional use and survival through the main-stem of the river and an alternative migration route, the Stillwater Branch. The work was conducted prior to removal of two main-stem dams and operational changes in hydropower facilities in the...
متن کاملEnvironmental disturbances and fishes in the Amazon.
The Amazon is a multi-faceted biome extending across all of the countries in northern South America. Aquatic habitats include watercourses of all sizes, beaches, lakes, flooded forests and floodplain areas. White, black and clear water types differ in the amount and nature of their sediments and in their levels of dissolved organic carbon, ion content, pH, water density and temperature. This en...
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