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相关概念视频

Migration00:53

Migration

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Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
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Position-effect Variegation02:32

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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
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Chemotaxis and Direction of Cell Migration01:21

Chemotaxis and Direction of Cell Migration

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Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
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相关实验视频

Updated: Jan 7, 2026

Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings
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Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings

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天光诱导的光度梯度会影响迁徙的方向.

Yi Ji1, Yibo Ma1, Zhangsu Wen1

  • 1State Key Laboratory of Agricultural and Forestry Biosecurity, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.

Insects
|December 30, 2025
PubMed
概括

夜间的人工光 (ALAN) 制造天空闪光,扰乱了昆虫的迁徙. 秋季军虫避开更明亮的区域,可能会误导它们的季节性旅程并影响导航.

关键词:
秋天的军队 虫照明污染 照明污染 照明污染迁徙的昆虫 迁徙的昆虫 迁徙的昆虫导航 导航 导航 导向 导向这就是SkyGlow.

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科学领域:

  • 生态生态学 生态生态学
  • 环境科学 环境科学
  • 行为生态学 行为生态学

背景情况:

  • 夜间的人工光 (ALAN) 显著影响全球夜间生态系统.
  • 虽然对昆虫的直接光效已知,但天光对迁徙方向的影响尚不清楚.

研究的目的:

  • 为了研究天花灯诱导的光度梯度如何影响秋季军 (Spodoptera frugiperda) 的飞行方向.
  • 为了确定skyglow是否作为一个导航提示或干扰夜间迁徙者的干扰.

主要方法:

  • 控制的室内模拟复制SkyGlow的发光度梯度.
  • 实地测试用于在自然条件下观察飞行方向.
  • 利用秋季军,一个重要的夜间迁徙虫害.

主要成果:

  • 秋季军在光度梯度的存在下,始终朝着更黑暗的区域倾向.
  • 这种方向偏离了它们预期的季节性迁徙方向.
  • 观察到的反应在模拟和现场设置中都是一致的.

结论:

  • 天光产生的光度梯度可以作为夜行昆虫的方向线索.
  • 这些梯度可能会干扰和误导季节性迁移,作为生态陷.
  • 天光是夜间昆虫导航和远距离定位的一个未被认可的因素.