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鸟类如何利用地球磁场进行长距离迁徙导航,一直是生物学界的未解之谜。德国慕尼黑大学的研究团队通过绘制鸽子大脑图谱,并对鸽子内耳细胞进行单细胞转录组测序,证明了内耳是鸟类的磁感受器官,揭开了动物感知地球磁场的核心神经机制。2025年11月20日,相关研究成果发表于《Science》。

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鸟类如何利用地球磁场进行长距离迁徙导航,一直是生物学界的未解之谜。德国慕尼黑大学的研究团队通过绘制鸽子大脑图谱,并对鸽子内耳细胞进行单细胞转录组测序,证明了内耳是鸟类的磁感受器官,揭开了动物感知地球磁场的核心神经机制。2025年11月20日,相关研究成果发表于《Science》。

. 鸽子内耳藏着“生物罗盘”,揭示不迷路秘密. 科技导报, 2025 , 43 (23) : 11 -11 .
. Science & Technology Review, 2025 , 43 (23) : 11 -11 .
鸟类如何利用地球磁场进行长距离迁徙导航,一直是生物学界的未解之谜。德国慕尼黑大学的研究团队通过绘制鸽子大脑图谱,并对鸽子内耳细胞进行单细胞转录组测序,证明了内耳是鸟类的磁感受器官,揭开了动物感知地球磁场的核心神经机制。2025年11月20日,相关研究成果发表于《Science》。
关于鸟类如何感知磁场,目前有2种主流假说。一种认为,鸟类视网膜细胞中存在量子物理效应,使它们能够“看到”磁场。而另一种则认为,鸟喙中的微小氧化铁颗粒像微型指南针一样发挥导航作用。然而,研究人员对于动物感知磁信息的具体大脑区域、感觉神经元如何产生电磁变化敏感性知之甚少。
慕尼黑大学神经科学家David Keays团队采用全脑活动扫描技术,结合组织透明化与光片显微镜,首次在鸽子脑中观测到磁刺激引发的特异性神经激活。他们让鸽子暴露在比地球磁场稍强的磁场超1 h,同时固定鸽子头部并旋转磁场,以模拟鸽子头部相对于地球磁场的运动。
随后,Keays团队通过基因标记测量法分析鸽子大脑中神经元的激活模式。通过将暴露于磁场的鸽子大脑活动图谱与未暴露的对照组进行比较,研究人员发现,在接收前庭系统输入信息和整合各种感觉刺激的大脑区域,存在与磁场相关的神经元活动。该发现将鸽子“内置罗盘”的感应范围缩小到前庭系统。
类似鲨鱼和鳐拥有感知微弱电场的器官。Keays团队发现,这些动物表达了一种对神经元电活动变化敏感的蛋白质。该蛋白质经过10个氨基酸长度的插入修饰,使其能够感知由磁场产生的电流。
Keays表示,他和合作者在2019年发现鸽子的基因组中也存在类似的变异。在这项研究中,他们对鸽子前庭系统细胞进行单细胞转录组测序,以寻找参与探测电流的分子,最终发现对电磁变化敏感的蛋白质广泛存在。因此,当鸽子点头时,其内耳中的环状结构能够为大脑提供磁场的三维方向信息。
基于实验数据,研究者提出了全新模型:磁场信号经半规管毛细胞捕获后,通过前庭核中继,最终投射至尾侧中脑皮层进行空间导航整合。这条“前庭—中脑皮层通路”首次将外周感应与中枢处理串联,完善了动物磁感应的理论框架。
(综合:《Science》《中国科学报》 《陕西科技报》)

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2种不同金属材料的力学参数

Family
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Number of
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Percentage of
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Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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