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相关概念视频

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
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Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
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Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
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相关实验视频

Updated: Sep 17, 2025

Functional Evaluation of Olfactory Pathways in Living Xenopus Tadpoles
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城市发展环境会根据原产地改变的现象型.

Andrew D Cronin1,2, Judith A H Smit1,2, Jacintha Ellers1

  • 1Amsterdam Institute for Life and Environment, Section Ecology and Evolution, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.

The Journal of animal ecology
|June 30, 2025
PubMed
概括

城市化影响的发展,城市原产的青生长得更快,但在城市环境中经历受限制的生长. 这些变化凸显了跨世代对城市条件的适应性反应.

关键词:
这种瘤叫做Engystomops pustulosus.适应 适应 适应 适应幼虫的发展 幼虫的发展现型性可塑性 现型性可塑性城市生态学和进化

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科学领域:

  • 生态生态学 生态生态学
  • 进化生物学 进化生物学
  • 环境科学 环境科学

背景情况:

  • 城市化大大改变了自然环境,给生物多样性带来了挑战.
  • 变形生物,特别是在脆弱的生命早期阶段,非常容易受到城市影响.
  • 了解城市条件如何影响早期发展对于评估更广泛的生态和进化后果至关重要.

研究的目的:

  • 研究城市环境条件对加拉青 (Engystomops pustulosus) 的发育表型的影响.
  • 检查头的起源 (城市与森林) 和发展环境 (城市与森林) 之间的相互作用.
  • 评估城市化如何影响生命早期发育时间,形态和行为.

主要方法:

  • 进行了一项相互移植实验,使用来自城市和森林种群的túngara青.
  • 子被分开,并暴露在城市或森林发展条件下两周.
  • 测量了发育时间,形态和警行为,以评估治疗和起源效应.

主要成果:

  • 来自城市人口的子表现出更快的发育速度,无论治疗环境如何.
  • 与森林环境相比,暴露在城市环境中导致子的生长受到限制,无论其来源如何.
  • 与森林原产的相比,城市原产的在受到干扰时表现出增强的行为可塑性.

结论:

  • 城市环境条件会影响子的发育现象在几代人内和跨代人之间,很可能是为了适应更温暖的城市温度.
  • 幼生长和发育的差异可能有助于在城市和森林地区之间观察到成年túngara青表型的差异.
  • 整合早期发展阶段对于全面了解城市化的进化和生态影响至关重要.