地理漫步·世界地理英语30篇（1）

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也门索科特拉岛独特植被

Socotra Island lies 380 kilometers off Yemen’s southern coast, isolated for over 20 million years by deep ocean currents and arid winds.
This long separation allowed plants to evolve unusual forms unseen anywhere else—like the dragon’s blood tree with its umbrella-shaped crown.
Its thick, waxy leaves minimize water loss, while latex sap turns red when exposed to air, possibly deterring insects.
Over one-third of Socotra’s 825 plant species are endemic, including the cucumber tree and desert rose with swollen water-storing stems.
Seasonal fog from the Arabian Sea provides critical moisture, letting succulents thrive despite less than 150 mm annual rainfall.
Goats introduced centuries ago now threaten rare shrubs by overgrazing seedlings before they mature.
Botanists collaborate with local herders to identify and fence off key regeneration zones using traditional stone walls.
UNESCO declared Socotra a World Heritage site in 2008, recognizing it as a ‘living museum of evolution’.
Climate models predict drier conditions by 2050, which may shrink fog frequency and stress already vulnerable endemics.
Each endemic plant tells a story—not just of adaptation, but of resilience shaped by solitude and scarcity.