how do rivers affect the biodiversity of an area ?
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7
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Large dams fragment rivers and habitats, isolating species, interrupting the exchange of nutrients between ecosystems, and cutting off migration routes. They reduce water and sediment flows to downstream habitat, and can decimate a river's estuary, where many of the world's fish species spawn.
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10
Answer:
Large dams fragment rivers and habitats, isolating species, interrupting the exchange of nutrients between ecosystems, and cutting off migration routes. They reduce water and sediment flows to downstream habitat, and can decimate a river's estuary, where many of the world's fish species spawn.
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