地理漫步·世界地理英语30篇（6）

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生态系统崩溃的空间阈值：当破碎化切断连通性

Wildlife corridors must exceed minimum width to support seasonal migration of large mammals.
Roads narrower than 50 meters still permit small mammal movement but block amphibians completely.
Island biogeography theory predicts species loss when habitat patches fall below critical area.
River damming fragments aquatic gene flow, reducing genetic diversity downstream over decades.
Wind-dispersed plant seeds fail to cross gaps wider than 300 meters in arid zones.
Satellite data reveal forest fragmentation accelerates once canopy cover drops below 40%.
Urban sprawl creates 'ecological deserts' where pollinators cannot travel between flowering patches.
Marine protected areas lose effectiveness if buffer zones shrink below 12-kilometer coastal widths.
Thresholds vary by biome, yet all reflect how space constrains biological process rates.
Mapping connectivity loss helps prioritize landscape restoration where spatial thresholds remain intact.

听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。

River damming fragments aquatic gene flow, reducing genetic diversity downstream over decades. 河流筑坝会割裂水生生物基因流，数十年内导致下游遗传多样性下降。
Satellite data reveal forest fragmentation accelerates once canopy cover drops below 40%. 卫星数据显示：森林冠层覆盖率一旦低于40%，破碎化速度加快。
Urban sprawl creates 'ecological deserts' where pollinators cannot travel between flowering patches. 城市无序扩张形成‘生态荒漠’，传粉者无法在开花斑块间移动。

这篇中文题目最接近哪一句？生态系统崩溃的空间阈值：当破碎化切断连通性一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？野生动物廊道宽度须超过最低阈值，才能支持大型哺乳动物的季节性迁徙。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Spatial Thresholds in Ecosystem Collapse: When Fragmentation Breaks Connectivity How to cook noodles A maths worksheet

River damming fragments aquatic gene flow, reducing genetic diversity downstream over decades.

River damming fragments aquatic gene flow, reducing genetic diversity downstream over decades.

第一版：录下来、回听、再听标准音。系统打分以后再加。

用今天的表达，自己说一句。

例子：River damming fragments aquatic gene flow, reducing genetic diversity downstream over decades.