地理漫步·世界地理英语30篇（4）

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巴塔哥尼亚草原：南端风蚀干旱带

The Patagonian steppe stretches across southern Argentina and Chile, shaped by rain shadows from the Andes.
Cold Falkland Current offshore cools air masses, reducing moisture before they reach land.
Strong westerly winds erode soils and limit tree growth across this vast semi-desert region.
Despite low rainfall, endemic shrubs and hardy grasses adapt through deep taproots and woolly leaves.
Glacial moraines and ancient lakebeds reveal how ice-age climate shifts reconfigured this landscape.
Sheep ranching dominates land use, but overgrazing intensifies desertification in vulnerable micro-basins.
Rivers like the Chubut flow intermittently, carving narrow valleys amid otherwise flat, gravelly plains.
Biodiversity includes guanacos, Darwin’s rheas, and burrowing owls adapted to open, windy spaces.
Seasonal dust storms transport fine sediments hundreds of kilometers toward the Atlantic Ocean.
Conservation efforts focus on protected areas such as Monte León National Park to safeguard fragile ecosystems.