Imagine a river that has flowed for millennia—a liquid artery connecting mountain snowmelt to the vast, pulsing ocean. For millions of years, this water was a highway for life. Fish migrated upstream to spawn, amphibians navigated between wetlands, and nutrient-rich sediment nourished entire ecosystems. Today, however, these rivers are increasingly silenced and segmented. In China, a nation currently home to nearly half of the world’s large dams, the river landscape has been fundamentally altered. While these engineering marvels provide hydroelectric power and irrigation, they have inadvertently turned China’s freshwater giants into fragmented corridors, leaving native wildlife as hostages of concrete, while simultaneously opening the floodgates to ecological invaders. The Concrete Barrier: When Nature’s Highways Become Dead Ends The construction of massive hydroelectric projects—such as the Three Gorges Dam on the Yangtze River—stands as a testament to human ingenuity - Britannica...
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