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相关概念视频

Trophic Levels01:35

Trophic Levels

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All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food from either solar or chemical energy. Each subsequent level obtains energy from the levels below. Detritivores can occupy any of the levels above primary producers.
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Ecological Disturbance02:26

Ecological Disturbance

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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.
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What is an Ecosystem?01:17

What is an Ecosystem?

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Overview
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What is Biodiversity?01:19

What is Biodiversity?

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Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
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Trophic Efficiency00:46

Trophic Efficiency

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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.
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Diversity of Protists II01:27

Diversity of Protists II

Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...

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相关实验视频

Updated: Jun 5, 2025

JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning
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JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning

Published on: March 21, 2025

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生态系统的稳定性取决于食物层之间的多样性差异.

Yizhou Liu1,2, Jiliang Hu1, Jeff Gore1

  • 1Physics of Living Systems, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.

Proceedings of the National Academy of Sciences of the United States of America
|December 6, 2024
PubMed
概括

生态社区的稳定性取决于食物层之间的多样性差异,而不是绝对的物种数量. 类似的多样性水平会造成不稳定,而差异会增强生态系统的弹性.

关键词:
多样性的多样性多样性的多样性生态学生态学是什么稳定的稳定性 稳定的稳定性奖杯级别的奖杯水平.

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Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity
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Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

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

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相关实验视频

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科学领域:

  • 生态生态学 生态生态学
  • 理论生态学理论生态学
  • 社区生态学社区生态学

背景情况:

  • 生物多样性与生态系统稳定性之间的关系是生态学中一个核心的,有争议的话题.
  • 之前的研究已经产生了相互矛盾的结果,即更高的生物多样性是否增强或减少稳定性.
  • 人类的福祉直接与通过服务和健康的生态系统稳定性有关.

研究的目的:

  • 为了研究在确定生态社区的稳定性中食量级之间的多样性差异的作用.
  • 解决关于生物多样性与稳定关系的相互矛盾理论.
  • 根据跨层次的多样性,制定一个定量稳定性标准.

主要方法:

  • 对具有多种捕食者和猎物物种的最小两级生态系统模型的分析.
  • 分析稳定性标准的推导.
  • 将模型扩展到三个营养水平和其他相互作用类型 (例如交叉养).

主要成果:

  • 社区的稳定性取决于食物层之间的多样性差异,而不是绝对的多样性.
  • 一个层面的多样性越来越多,显示出一个重新进入的过渡:最初的不稳定,然后是稳定.
  • 最不稳定的社区在不同的热带层表现出相似的多样性水平.
  • 衍生的稳定性标准量化了层次间相互作用相关性的影响.

结论:

  • 营养水平的结构和多样性差异对于生态系统的稳定性至关重要.
  • 稳定性对多样性的非单调依赖解释了各种经验观察.
  • 这些发现为预测生态系统行为和稳定性提供了一个新的框架.