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相关概念视频

Speciation Rates01:07

Speciation Rates

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Overview
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Predator-Prey Interactions02:39

Predator-Prey Interactions

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Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
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Types of Selection01:46

Types of Selection

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Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
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Energy Budgets00:51

Energy Budgets

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Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
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Epiphytes, Parasites, and Carnivores02:40

Epiphytes, Parasites, and Carnivores

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Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
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The Evidence for Evolution02:55

The Evidence for Evolution

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Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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相关实验视频

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Testing Visual Sensitivity to the Speed and Direction of Motion in Lizards
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形式-功能关系是的快速饮食变化的基础.

M Taverne1, P J Watson2, H Dutel2,3

  • 1UMR 7179, Département Adaptations du Vivant, Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique, Paris, France.

Proceedings. Biological sciences
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概括
此摘要是机器生成的。

的小头骨形状和肌肉变异可能导致显著的食性能差异. 这使得它们能够快速适应新的食物来源,表明微观进化变化是如何推动宏观进化生态转变的.

关键词:
适应 适应 适应 适应咬伤力 咬伤力 咬伤力饮食 饮食 饮食 饮食有限元素模型的模型.子 子 子 子多体动力学 多体动力学

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相关实验视频

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科学领域:

  • 进化生物学 进化生物学
  • 生态形态学 生态形态学
  • 功能性形态学 功能性形态学

背景情况:

  • 饮食和息地的宏观进化变化与适应性形态变化有关.
  • 在推动生态变化方面,小规模的,人口层面的形态变异在推动生态变化的作用仍然不清楚.

研究的目的:

  • 在引入的种群中调查形状,食机制和饮食转变之间的关系.
  • 了解微演变形态变异如何影响宏演变生态变化.

主要方法:

  • 使用3D几何形态测量和剖析量化头骨形状和肌结构差异.
  • 通过基于计算机的生物力学模拟来评估系统的机械性能.
  • 结果与现有的关于岛屿的宏观进化数据进行了比较.

主要成果:

  • 鉴定出源种群和引入种群之间头骨形状和肌结构的微妙差异.
  • 证明这些轻微的形态变异显著提高了养性能.
  • 表明,提高性能可以获得新的热带资源.

结论:

  • 小规模的形态变异可以推动快速的生态适应和饮食转变.
  • 形状和肌肉结构的变化会影响机械性能,促进对新资源的获取.
  • 提供了关于自然选择如何在短时间内推动重大生态变化的见解.