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相关概念视频

Conservation of Small Populations02:04

Conservation of Small Populations

16.7K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
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What is Conservation Biology?01:57

What is Conservation Biology?

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Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
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Lung Capacity01:47

Lung Capacity

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The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.
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Conserved Binding Sites01:49

Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
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Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

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Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
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Conservative Forces01:03

Conservative Forces

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Conservative forces are an essential concept in the field of mechanical engineering. Understanding the properties and characteristics of these forces is crucial to the design and analysis of mechanical systems.
Conservative forces are forces that are dependent only on the initial and final positions of an object and that are independent of the path that the object takes between these positions. These forces conserve energy, which means that the work done by the force is independent of the path...
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相关实验视频

Updated: Jan 22, 2026

Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

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保护应该假定现实的适应能力.

Mark C Urban1,2, Chris S Elphick1,2, Daniel I Bolnick1,2

  • 1Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269.

Proceedings of the National Academy of Sciences of the United States of America
|January 20, 2026
PubMed
概括
此摘要是机器生成的。

保护计划往往忽视了物种.

关键词:
气候变化 气候变化 气候变化进化中的救援.它们的可进化性.全球变化全球变化遗传性 遗传性 遗传性

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A Method to Study the Impact of Chemically-induced Ovarian Failure on Exercise Capacity and Cardiac Adaptation in Mice
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Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
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相关实验视频

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Visualizing Visual Adaptation
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科学领域:

  • 进化生物学是进化的生物学.
  • 保护科学 保护科学
  • 生态生态学 生态生态学

背景情况:

  • 保护策略经常假设遗传率为零,忽视了受威胁种群的适应潜力.
  • 目前对美国受威胁和危物种的恢复计划很少评估人口内部的适应能力,这反映了对缓慢或无关紧要的进化反应的普遍假设.
  • 在保护计划中忽视适应能力可能会阻碍有效的物种恢复工作.

研究的目的:

  • 评估保护计划在多大程度上考虑了种群的适应能力.
  • 收集自然种群中遗传性和进化性的证据.
  • 展示如何结合适应能力可以改善保护结果.

主要方法:

  • 分析了美国10年来受威胁和危物种恢复计划.
  • 关于遗传性 (h2) 和演化性 (IA) 估计的文学汇编.
  • 审查保护评估,以确定考虑适应性的影响.

主要成果:

  • 只有4%的评估恢复计划评估了人口内部的适应能力.
  • 研究中的中位遗传性 (h2) 和进化性 (IA) 分别为0.3和0.4,表明了显著的适应潜力.
  • 考虑适应能力可以改变保护优先级和管理建议.

结论:

  • 适度的遗传性和进化性表明,许多种群可以适应不断变化的环境.
  • 保护计划应整合人口的适应能力,在缺少特定数据的情况下,使用预期适应能力中等的默认预期 (h2 = 0.3,IA = 0.4).
  • 考虑适应能力可以增强物种救援和优化资源分配在保护.