什么叫“宿主操控”，寄生虫怎样改变宿主行为？
What is 'host manipulation', and how do parasites alter host behavior?
一些寄生虫会分泌化学物质改变宿主的大脑和行为，以完成自己的生命史。例如寄生蚂蚁的真菌让蚂蚁爬到高处死死咬住叶脉，方便真菌孢子散播；弓形虫让老鼠不怕猫，更易被猫吃下从而进入终宿主。这种现象被称为“行为操控”。
Some parasites secrete chemicals that change the host's brain and behavior to complete their life cycle. For example, a fungus infecting ants makes them climb high and clamp onto a leaf vein so spores disperse; Toxoplasma makes rodents unafraid of cats so they get eaten, reaching the cat final host. This is called 'behavioral manipulation.'
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#宿主操控 #弓形虫 #行为寄生
根瘤菌与豆科植物共生固氮时,为什么根瘤内的氧气必须由豆血红蛋白严格缓冲?
In the rhizobium-legume symbiosis, why must oxygen inside the nodule be strictly buffered by leghemoglobin?
固氮酶遇氧即发生不可逆失活,类菌体必须在接近无氧的环境中才能工作。但根瘤菌的呼吸链又需要氧气来产生驱动固氮所需的大量ATP。豆血红蛋白把游离氧浓度压到纳摩尔级别,同时以结合态向类菌体持续供氧,在保护和供能之间取得平衡。
Nitrogenase is irreversibly inactivated on contact with oxygen, so bacteroids can only operate in a near-anoxic milieu. Yet the respiratory chain of rhizobia still needs oxygen to generate the large ATP supply that nitrogen fixation demands. Leghemoglobin holds free O2 at nanomolar levels while delivering bound oxygen continuously to the bacteroids, reconciling protection with energy supply.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Appleby C.A., 'Leghemoglobin and Rhizobium Respiration', Annual Review of Plant Physiology, 1984;Dixon & Wheeler, 'Nitrogen Fixation in Plants', Cambridge University Press
Appleby C.A., 'Leghemoglobin and Rhizobium Respiration', Annual Review of Plant Physiology, 1984; Dixon R.O.D. & Wheeler C.T., 'Nitrogen Fixation in Plants', Cambridge University Press
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1146/annurev.pp.35.060184.002303：Leghemog
#固氮酶 #豆血红蛋白
根瘤菌和豆科植物怎样“分工”固氮？
How do rhizobia and legume plants 'divide labor' to fix nitrogen?
豆科植物根部分泌信号吸引根瘤菌进入，形成根瘤供其居住。根瘤菌用固氮酶把空气中的氮气变成植物能用的氨，植物则提供糖和安居环境。这种共生减少了化肥需求，是天然氮肥厂。
Legume roots secrete signals that invite rhizobia in, forming nodules as their home. The bacteria use nitrogenase to convert atmospheric nitrogen into ammonia the plant can use, while the plant supplies sugars and shelter. This symbiosis cuts fertilizer need—a natural nitrogen factory.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#根瘤菌 #固氮 #豆科植物
牛背鹭站在水牛背上是在“搭便车”吗？
When cattle egrets stand on buffalo backs, are they just 'hitchhiking'?
牛背鹭跟着大型草食动物，啄食被它们惊飞的昆虫，双方都受益：水牛少了蚊蝇骚扰，鸟得到现成美食，这是偏利或互利关系。它们也会站在牛背上瞭望和休息，是草原上常见的搭档。
Cattle egrets follow large grazers and snap up insects flushed by them; both benefit—the buffalo gets fewer flies, the bird gets easy meals—a commensalism or mutualism. They also perch on backs to watch and rest, common grassland partners.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Odum & Barrett,《Fundamentals of Ecology》第5版,Brooks/Cole,2004
E. P. Odum and G. W. Barrett, Fundamentals of Ecology, 5th ed., Brooks/Cole, 2004
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL3334843W：Fundamentals of ecology
#牛背鹭 #偏利共生 #食虫
地衣是植物吗？它到底是什么？
Is lichen a plant? What exactly is it?
地衣不是单一植物，而是真菌和藻类（或蓝藻）的共生体：真菌提供结构和水分保护，光合伙伴提供糖类。它们能在裸岩上生长，是开路先锋，慢慢把岩石风化成土壤。
Lichen is not a single plant but a symbiosis of fungus and alga (or cyanobacterium): the fungus gives structure and moisture protection, and the photosynthetic partner supplies sugars. They grow on bare rock as pioneer species, slowly weathering stone into soil.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#地衣 #真菌 #共生体
椰子蟹为什么能爬树还力大无穷？
Why can the coconut crab climb trees and be so strong?
椰子蟹是陆生最大的节肢动物，强壮的螯足能撬开椰子，也能攀附树干取食落果。它虽用鳃但演化出可呼吸空气的鳃室，必须回潮湿处蜕壳长大。它是从海生寄居蟹演化来的“上岸”奇迹。
The coconut crab is the largest land arthropod; its powerful claws crack coconuts and grip trunks to reach fallen fruit. Though gill-bearing, it evolved air-breathing gill chambers and must return to damp spots to molt. It is a 'landing' marvel descended from marine hermit crabs.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
《动物学》
Campbell Biology
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787807410614（豆瓣书目条目: 动物学）
#椰子蟹 #陆生 #蜕壳
人体里的螨虫在脸上“安家”有害吗？
Are the mites living on our faces harmful?
毛囊蠕形螨是几乎人人脸上都有的微型螨，平时以皮脂和死皮为食，多数无害也不被察觉。只有当免疫低下或数量过多时才可能引发轻微皮炎。它们更像是安静的“房客”而非敌人。
Demodex folliculorum mites live on almost everyone's face, feeding on sebum and dead skin, usually harmless and unnoticed. Only when immunity is low or numbers surge may they cause mild dermatitis. They are quiet tenants more than enemies.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#蠕形螨 #皮肤 #共生
为什么热带鱼身上常有清洁虾“打工”？
Why do tropical fish often have 'working' cleaner shrimp on them?
清洁虾和某些小鱼会啄食鱼体表的寄生虫和死皮，宿主鱼因此少生病，清洁者则获得一顿饭，双方互利。有些鱼甚至排隊等待“清洁服务”，形成固定的清洁站。
Cleaner shrimp and some small fish pick parasites and dead skin off larger fish, so the host stays healthier while the cleaner gets a meal—a mutualism. Some fish even line up at fixed 'cleaning stations' waiting for service.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Odum & Barrett,《Fundamentals of Ecology》第5版,Brooks/Cole,2004
E. P. Odum and G. W. Barrett, Fundamentals of Ecology, 5th ed., Brooks/Cole, 2004
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL3334843W：Fundamentals of ecology
#清洁共生 #清洁虾 #互利
蜜蜂和花之间是什么关系？
What is the relationship between bees and flowers?
蜜蜂采花蜜和花粉作食物，同时把花粉带到另一朵花上帮助植物授粉，双方都受益，是互利共生。没有蜜蜂等传粉者，许多水果和坚果的产量会大幅下降。
Bees collect nectar and pollen as food while carrying pollen to other flowers, helping plants reproduce; both sides benefit, a mutualism. Without bee pollinators, yields of many fruits and nuts would drop sharply.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#蜜蜂 #传粉 #互利共生
蚜虫为什么屁股上常有小蚂蚁围着？
Why do ants often gather around aphids' rear ends?
蚜虫吸食植物汁液后会排出甜甜的“蜜露”，蚂蚁爱吃这种糖液，便守在旁边“放牧”蚜虫并驱赶其天敌。蚂蚁得到食物，蚜虫得到保护，是一种互利关系。
Aphids suck plant sap and excrete sugary 'honeydew' that ants love, so ants stand by 'herding' them and fend off predators. The ants get food and the aphids get protection—a mutualism.
难度 入门 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
Hölldobler & Wilson,《蚂蚁》(The Ants),斯普林格出版集团
Hölldobler & Wilson, The Ants, Springer-Verlag
#蚜虫 #蜜露 #蚂蚁放牧
蚊子吸血是为了填饱肚子吗？
Does a mosquito suck blood just to fill its stomach?
只有雌蚊吸血，而且主要是为了获取蛋白质来发育卵巢、产卵，吸血本身并非日常能量来源。雄蚊和雌蚊平时都靠花蜜和果汁维生。所以蚊子吸血是繁殖需要而非单纯觅食。
Only female mosquitoes bite, mainly to get protein for egg development; blood is not their everyday energy source. Both sexes normally feed on nectar and fruit juice. So blood-feeding serves reproduction, not mere hunger.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Ed Yong,《I Contain Multitudes》Ecco/HarperCollins,2016;中译《我包罗万象》(郑李译),后浪丨北京联合出版公司,2019
Ed Yong, I Contain Multitudes, Ecco/HarperCollins, 2016; Chinese ed. (Zheng Li tr.), Beijing United Publishing (Houlang), 2019
#蚊子 #吸血 #繁殖