🦤 生物多样性丧失：第六次大灭绝？🦤 Biodiversity Loss: the Sixth Mass Extinction?
上一片保住了土，可住在上面的生命呢？蓝蓝翻开物种名录：好多名字正在消失，速度快得吓人。Last leaf we saved the soil — but what about the life living on it? Lanlan opens the species list: names are vanishing, shockingly fast.
第 1 步：渡渡鸟去哪儿了Step 1: Where did the dodo go?
先看两个真实故事：它们都曾多到数不清。Two true stories first: both were once too many to count.
渡渡鸟住在海岛上，不会飞。人类上岛后，猫狗吃鸟蛋，森林被砍光，它约在 1681 年前后灭绝。旅鸽曾几十亿只，被捕杀到一只不剩。如今物种消失速度是自然的百倍以上，有人叫它第六次大灭绝。The dodo lived on an island and could not fly. After humans landed — cats and dogs eating eggs, forests felled — it went extinct around 1681. Passenger pigeons once numbered billions, hunted down to zero. Today species vanish 100+ times faster than nature's pace — some call it the sixth mass extinction.
谁在赶走它们？凶手有四个，而且全和人有关。Who is driving them out? Four culprits — all linked to us.
第 2 步：家是怎么碎的Step 2: How homes get shattered
头号凶手是栖息地破坏：路把森林切成小块，动物见不了面。二号是过度捕猎，三号是污染，四号是入侵物种，比如吃鸟蛋的老鼠。家碎了，物种就像孤岛，慢慢消失。Culprit one is habitat destruction: roads slice forests into pieces, animals cannot meet. Two is overhunting, three is pollution, four is invasive species — like egg-eating rats. Shattered homes turn species into lonely islands, fading away.
物种少了，人类会怎样？别忘了：我们也靠它们吃饭。Fewer species — so what? Remember: we eat because of them.
第 3 步：留住未来的办法Step 3: Ways to keep the future
生物多样性是基因库：每个物种都藏着未来的药和粮食。保护要三件套：建保护区留住安全的家，人工繁育后再放归野外，管住捕猎和污染。家保住了，未来才保得住。Biodiversity is a gene bank: every species may hide future medicine and food. Protection takes three: reserves as safe homes, breeding then release to the wild, and stopping hunting and pollution. Keep the homes, keep the future.
🎮 你来当拯救队长（30 秒）🎮 Your turn: rescue captain (30 seconds)
道理讲完了。4 个求救案例，每个选 1 个最管用的办法；最后一个问你：哪种做法根本没用。Theory done. Four rescue cases — pick the most useful move for each; the last one asks: which move helps nothing at all?
一句话记住它：生物多样性丧失 = 物种消失快过自然百倍，凶手是栖息地破坏、过度捕猎、污染、入侵物种；保护区 + 繁育放归 + 管住人手，就是解药。Remember it in one line: biodiversity loss = species vanishing 100x faster than nature, driven by habitat destruction, overhunting, pollution and invaders; reserves + breed-and-release + restraining our hands are the cure.
速度：现在消失速度是自然的百倍以上，渡渡鸟旅鸽是前车Speed: vanishing 100x+ faster than nature — dodos and pigeons came first凶手：栖息地破坏、过度捕猎、污染、入侵物种Culprits: habitat destruction, overhunting, pollution, invasive species解药：保护区、繁育放归、管住捕猎污染；抓回家不算保护Cure: reserves, breed-and-release, stop hunting and pollution; pets don't count
内容参考 OpenStax 等公开教材，多来源核对 · AI 生成、人工审核 · 发现错误欢迎指正，帮这片叶子长得更好。Based on OpenStax and other open textbooks, cross-checked across sources · AI-generated, human-reviewed · Spotted a mistake? Tell us — help this leaf grow.
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