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相关概念视频

What is an Ecosystem?01:17

What is an Ecosystem?

Overview
Trophic Efficiency00:46

Trophic Efficiency

Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
Global Climate Change01:50

Global Climate Change

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.
Ecological Succession02:17

Ecological Succession

Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
Ecological Disturbance02:26

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...

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相关实验视频

Updated: Jun 23, 2026

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
10:20

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter

Published on: March 12, 2013

通过生态系统提取弱气候信号.

Arnold H Taylor1, J Icarus Allen, Paul A Clark

  • 1Plymouth Marine Laboratory, Prospect Place, Plymouth PL1 3DH, UK. aht@pml.ac.uk

Nature
|April 12, 2002
PubMed
概括

生态系统可以放大弱气候信号,影响生物系统超出主导变量. 一个海洋模型展示了浮游生物如何响应海湾流的微妙变化,展示了复杂的气候生态系统相互作用.

科学领域:

  • 生态生态学 生态生态学
  • 气候科学 气候科学
  • 海洋生物学 海洋生物学

背景情况:

  • 生态系统对外部强迫有复杂的非线性反应,可能会放大微妙的气候信号.
  • 之前的研究表明,厄尔尼诺现象与降雨/玉米产量以及与辐射和二氧化碳水平相关的长期冰河时代周期之间存在很强的相关性.

研究的目的:

  • 为了证明详细的海洋生态系统模型如何提取分布在多个气象变量的弱气候信号.
  • 为了研究生物系统对气候信号的反应,超越主导驱动变量.

主要方法:

  • 使用了详细的海洋生态系统模型.
  • 专注于英国浮游生物种群与海湾流作为案例研究的地位之间的关联.
  • 在不同的气象变量中分析了弱信号的提取.

主要成果:

  • 海洋生态系统模型成功地从各种气象变量中提取了弱气候信号.
  • 证明生物系统可以响应微妙的气候影响,而不仅仅依赖于主导的驱动因素.
  • 该模型显示了浮游生物种群如何受到海湾流的位置的影响.

结论:

  • 生物系统可以对弱气候信号做出反应,这些信号与多种环境因素相结合.

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Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
10:20

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Published on: March 12, 2013

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 16, 2013

Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites
09:05

Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites

Published on: June 24, 2019

  • 海洋生态系统模型是了解复杂的气候生态系统相互作用的宝贵工具.
  • 这种方法突出了检测和理解气候变化对生物多样性的微妙影响的潜力.