相关实验视频

Updated: Jul 16, 2025

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

同一个过程,不同的模式:进化时间对淡水鱼类物种丰富性的普遍影响

Ana Berenice García-Andrade¹, Pablo A Tedesco², Juan D Carvajal-Quintero³

¹Laboratorio de Macroecología Evolutiva, Red de Biología Evolutiva, Instituto de Ecología, A.C. Carretera antigua a Coatepec 351, El Haya, 91070 Xalapa, Veracruz, México.

Proceedings. Biological sciences

|September 13, 2023

概括

热带地区的物种多样性很高,但度多样性梯度 (LDG) 在鱼类种类之间有所不同. 进化时间显著影响全球鱼类物种丰富性,较古老的物种在更富裕的地区发现.

科学领域:

动物学动物学
生态生态学生态生态学
进化生物学进化生物学

背景情况:

热带地区的生物多样性最高,通常遵循度多样性梯度 (LDG).
对LDG存在例外,受进化历史和对物种特征的环境约束的影响.
了解这些变异需要在不同的分类学层面检查模式.

研究的目的:

为了绘制详细的物种丰富模式的Actinopterygian淡水鱼跨订单.
为了确定这些鱼类的度多样性梯度 (LDG) 的驱动因素.
评估进化和生态因素在塑造鱼类生物多样性梯度中的作用.

主要方法:

应用了解构方法来分析Actinopterygian淡水鱼的物种丰富性模式.
利用了地理范围的数据和全面的族系学 (77%的描述物种).
共同评估了七个假设:多样化速率,物种化时间,物种面积,环境异质性,能量,温度季节性和过去温度稳定性.

主要成果:

在鱼类种群中观察到不同的度多样性梯度 (LDGs),包括预期的,双模的和反向的模式.
发现进化时间是所有阶级物种丰富性的一致的积极预测指标.
与物种贫困地区相比,物种丰富地区的特点是拥有较古老的物种.

结论:

淡水鱼类的度多样性梯度 (LDG) 是由特定于每个类的因素的独特组合形成的.
进化时间在解释全球物种丰富模式方面起着至关重要的作用.
对生物多样性梯度的全面理解需要在各个分类学层面共同评估进化,历史和生态因素.

关键词:

这就是Actinopterygii.度多样性梯度的度梯度.温度的季节性温度的季节性具体化时间假设.

更多相关视频

Resurrection of Dormant Daphnia magna: Protocol and Applications

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

Published on: July 20, 2017

相关概念视频

Speciation Rates

Speciation Rates

The Evidence for Evolution

The Evidence for Evolution

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.

Gene Evolution - Fast or Slow?

Gene Evolution - Fast or Slow?

The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...

What is Evolutionary History?

What is Evolutionary History?

Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.

Genetics of Speciation

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.

Diversity of Protists IV

Diversity of Protists IV

Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...