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The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Time differentiation, convolution, integration, and periodicity are fundamental concepts in analyzing functions and signals over time. Each concept provides a unique perspective on how functions evolve, interact, and repeat, offering essential tools for various scientific and engineering applications.
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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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现象学 现象学是指现象学.

Kirsty H Macphie1, Albert B Phillimore1

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现象学,季节性自然事件的研究,揭示了气候变化对地球生态系统的广泛影响. 了解这些变化对于人口持续性和物种相互作用至关重要.

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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
  • 气候科学 气候科学

背景情况:

  • 现象学研究自然界中经常出现的季节性生命史事件.
  • 对现象学的兴趣跨越了文化和历史,从古代传统到文学.
  • 现象学数据提供了人类气候变化影响的证据.

研究的目的:

  • 介绍现象学的科学领域.
  • 追踪现象学研究的历史发展.
  • 检查表态学在证明气候变化影响中的作用.

主要方法:

  • 评论历史和科学文献的现象学.
  • 作为气候变化指标的现象学数据分析.
  • 探索气候变化对生态系统的影响.

主要成果:

  • 现象学是一个长期存在的领域,具有深厚的文化根源.
  • 现象变化是全球气候变化的重要指标.
  • 观察到的变化对生物多样性和生态系统稳定性有深远的影响.

结论:

  • 现象学是理解气候变化影响的关键工具.
  • 未来的气候变化可能会威胁到种群的持续性和物种相互作用.
  • 对现象学的持续研究对于生态保护至关重要.