相关实验视频

Updated: Jun 18, 2025

Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats
04:55

Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats

Published on: June 17, 2020

3.5K

高海拔地区的阿尔卑斯山歌鸟只会在稍有延迟的情况下养,因此在更恶劣的环境条件下养

Julia Paterno1,2, Fränzi Korner-Nievergelt1,3, Stefanie Gubler4

  • 1Department of Environmental Sciences University of Basel Basel Switzerland.

Ecology and evolution
|July 29, 2024
PubMed
概括

高海拔地区的高山歌鸟比预期更早繁殖,适应较短的季节. 这项研究揭示了鸟类现象学如何随着高度的变化而变化,展示了对环境约束的进化应对机制.

关键词:
阿特拉斯的代码是Atlas代码.繁殖阶段 繁殖阶段可以检测到的可检测性.通过者 passerine 通过者植物现象学 植物现象学柳树Tit 柳树Tit 是一个

更多相关视频

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research06:16

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

Published on: February 2, 2022

2.4K
Dissection and Downstream Analysis of Zebra Finch Embryos at Early Stages of Development09:23

Dissection and Downstream Analysis of Zebra Finch Embryos at Early Stages of Development

Published on: June 21, 2014

10.9K

相关概念视频

Conservation of Declining Populations02:07

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
9.6K
Threats to Biodiversity01:50

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.2K
What is Natural Selection?01:32

What is Natural Selection?

Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
115.0K
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
21.9K
Types of Selection01:46

Types of Selection

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...
40.3K
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
31.2K