一个完整而充满活力的鸟类树
Emily Jane McTavish1, Jeff A Gerbracht2, Mark T Holder3
1Department of Life and Environmental Sciences, School of Natural Sciences, Merced, CA 95343.
概括
我们为所有鸟类物种创建了一个全面的进化树,整合了来自众多研究的数据. 本资源有助于理解鸟类的多样性和进化,并提供可复制的方法,用于未来的更新.
科学领域:
- 进化生物学 进化生物学
- 鸟类学 鸟类学是一门学科.
- 生物信息学是一种生物信息学.
背景情况:
- 鸟类物种之间的基因关系对于进化和生物多样性研究至关重要.
- 以前的遗传学估计在众多研究中被分散,阻碍了全面的分析.
- 所有鸟类物种的统一的,时间尺度的进化树是缺少的.
研究的目的:
- 为世界上所有鸟类物种构建一个完整的,时间缩放的进化树.
- 将现有的遗传学数据和分类学信息整合到一个单一的,强大的数据集中.
- 为未来的鸟类进化更新和分析提供可复制的框架.
主要方法:
- 利用开放树合成算法将来自262项研究 (1990-2024) 的遗传学估计结合起来.
- 纳入了对未被直接基因统计估计所涵盖的物种的策划分类学信息.
- 将树尖与克莱门斯分类学对齐,并与其他主要分类学系统 (Open Tree,NCBI,GBIF) 交叉映射.
主要成果:
- 创建了一个完整的,时间缩放的进化树 (Aves 1.3) 包含 10,824 到 11,017 种鸟类跨多个分类版本.
- 确保树的数据,软件和方法是公开的和可重复的.
- 通过使用链接的地理数据计算区域鸟类遗传多样性来证明其有用性.
结论:
- 呈现的鸟类进化树是大规模生物多样性研究的有价值,可更新的资源.
- 该方法可用于为其他分类群组创建类似的综合类遗传学估计.
- 每年更新将确保树木保持最新的新遗传学发现.
相关概念视频
Convergent Evolution
27.2K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
27.2K
Phylogeny
43.4K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
43.4K
Phylogenetic Trees
44.9K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
44.9K
Conservation of Declining Populations
9.6K
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
Survival Tree
44
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
Building a Survival Tree
Constructing a...
Building a Survival Tree
Constructing a...
44
The Bronchial Tree
1.8K
The human bronchi and bronchial tree play a crucial role in the respiratory system, facilitating the exchange of oxygen and carbon dioxide. Let's delve into the intricate structure and functions of these respiratory components.
The trachea, commonly known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi. At a point called the carina, it bifurcates into two primary bronchi. The right primary bronchus is wider, shorter, and more vertical than the left primary...
The trachea, commonly known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi. At a point called the carina, it bifurcates into two primary bronchi. The right primary bronchus is wider, shorter, and more vertical than the left primary...
1.8K


