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Updated: Feb 26, 2026

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Published on: March 8, 2020

アンデス鳥類とアマゾン鳥類で異なる分岐を促進する集団レベルのプロセスに関する考察

Pranav Gokhale¹

¹School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA.

Evolution; international journal of organic evolution

|February 25, 2026

Abstract:

Wacker and Winger (2026) examine population-level divergence across two very different but connected landscapes, the Andes and the Amazon, using genomic data from eight Tangara bird species. Andean populations show strong genetic structure, with lower gene flow and genetic diversity. In the Amazon, genetic structure is weak, with higher gene flow and genetic diversity. These results suggest that divergence can happen more easily in the Andes due to stronger geoclimatic barriers than in lowland Amazonia.

キーワード:

Tangara Andes Amazon genetic divergence population structure gene flow genetic diversity geoclimatic barriers landscape heterogeneity speciation

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Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients

Published on: August 22, 2018

Who is Who? Non-invasive Methods to Individually Sex and Mark Altricial Chicks

Who is Who? Non-invasive Methods to Individually Sex and Mark Altricial Chicks

Published on: May 24, 2014

関連する概念動画

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Formation of Species

Formation of Species

Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.

Speciation Rates

Speciation Rates

Convergent Evolution

Convergent Evolution

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.

Genetics of Speciation

Genetics of Speciation

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

Conservation of Declining Populations

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.