植物浮游生物可以积极多样化其迁移策略以应对动荡的线索
Anupam Sengupta1,2, Francesco Carrara1,2, Roman Stocker1,2
1Institute for Environmental Engineering, Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, 8093 Zurich, Switzerland.
Nature
|March 16, 2017
概括
海洋浮游生物,比如Heterosigma akashiwo,会积极地改变迁徙方向以应对流. 这种投注策略有助于移动物种逃避恶劣的环境,并在动态的海洋环境中生存.
科学领域:
- 海洋生物学
- 海洋学
- 流体动力学
背景情况:
- 海洋浮游生物面临来自流,营养和光线的环境挑战.
- 动态浮游生物使用垂直迁移来优化资源获取,但流会破坏这一点.
- 人们认为流会通过扰乱迁徙来使非运动物种胜过运动物种.
研究的目的:
- 调查植物浮游生物是否能够积极地响应乱的信号.
- 了解这种反应对物种继承的机制和影响.
- 探索积极适应水力动力学条件的潜力.
主要方法:
- 暴露植物浮游生物种群 (拉菲多菲特,恐龙) 模拟海洋流 (科尔莫戈罗夫级.
- 使用定量形态分析观察人口行为,专注于Heterosigma akashiwo.
- 使用细胞力学模型分析行为变化和细胞反应.
主要成果:
- 在遇到流时,植物浮游生物群分裂为上游和下游的子群.
- 这种迁移的多样化发生得很快 (5-60分钟),并涉及细胞不对称的调节.
- 这表明它们有活跃的逃生策略.
结论:
- 动态植物浮游生物可以积极适应迁徙行为以逃避动荡的层面,挑战经典观点.
- 这种积极的反应类似于进化对冲,在动态的海洋环境中提高生存能力.
- 植物浮游生物对水力动力学信号的快速反应是海洋生存的关键策略.
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