地理漫步·世界地理英语30篇（4）
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The Bering Strait: A Narrow Seaway Linking Oceans and Migratory Corridors
白令海峡：连接两洋与生物迁徙廊道的狭窄水道
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Only 85 kilometers wide, the Bering Strait separates Russia and Alaska while linking the Pacific and Arctic Oceans.
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Its shallow depth—less than 50 meters—allowed human and animal migrations during Pleistocene glacial low-sea stands.
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Cold Arctic waters flow south while warmer Pacific waters move north, creating turbulent mixing zones rich in plankton.
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Gray whales travel 20,000 km annually through this corridor, feeding in Arctic shelves and calving in Mexican lagoons.
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Sea ice extent fluctuates dramatically, influencing shipping routes and marine mammal behavior each season.
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Submarine canyons channel deep-water currents that affect regional ocean heat distribution and sea-level rise projections.
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Indigenous communities rely on seasonal sea-ice platforms for hunting seals and walruses across dynamic frozen terrain.
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Oil exploration and increased vessel traffic raise risks of spills in waters with limited response capacity and slow biodegradation.
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Tidal ranges exceed three meters here, exposing intertidal zones where clams and crabs support migratory shorebirds.
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Geopolitical boundaries cross ecologically unified marine space, demanding cooperative monitoring of shared species and habitats.