Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

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.

What is Population Genetics?

What is Population Genetics?

A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.While some alleles of a given gene might be observed commonly, other variants...

Mutation, Gene Flow, and Genetic Drift

Mutation, Gene Flow, and Genetic Drift

In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).Mechanisms of Genetic VariationThe original sources of genetic variation are mutations,...

Genetics of Speciation

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.The genetics of speciation involves the different traits or isolating mechanisms preventing gene exchange, leading to reproductive isolation. Reproductive isolation can be due to reproductive barriers that have effects either before or after the formation of a zygote. Pre-zygotic mechanisms prevent fertilization from occurring, and post-zygotic mechanisms...

Genetic Drift

Genetic Drift

Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.Life is not fair. A deer grazing contentedly in a field can have her meal cut tragically short by a bolt of lightning. If the doomed doe is one of only three in the population, 1/3 of the population’s gene pool is lost. Random events like this can...

Speciation Rates

Speciation Rates

Speciation can proceed at markedly different rates, and evolutionary biologists commonly describe these differences through the models of gradualism and punctuated equilibrium. Both patterns explain how new species arise, but they differ in the tempo and continuity of evolutionary change. In both cases, evolutionary change arises from heritable variation within populations, with natural selection often shaping traits that improve survival and reproduction under specific environmental conditions.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

The complete mitogenome, phylogenetic placement and cox1 variation of Cape sea urchins (Parechinus angulosus) in southern Africa.

Molecular biology reports·2026

Same author

Pediatric cancer survival in the United States from 2001 to 2021.

Cancer·2026

Same author

Global coral reef collapse is not inevitable.

Trends in ecology & evolution·2026

Same author

Characterizing viral clearance kinetics in acute influenza.

Philosophical transactions of the Royal Society of London. Series B, Biological sciences·2026

Same author

Differences in Lung Cancer Survival by Demographic Characteristics and Social Determinants of Health, United States, 2010-2020.

Public health reports (Washington, D.C. : 1974)·2026

Same author

Dengue therapeutics consortium 2025: a global collaboration in action.

BMJ public health·2026

Search research articles

Related Experiment Video

Updated: Jun 16, 2026

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

Ocean currents help explain population genetic structure.

Crow White¹, Kimberly A Selkoe, James Watson

¹Marine Science Institute, University of California, Santa Barbara, CA 93106, USA. crowsfeather@gmail.com

Proceedings. Biological Sciences

|February 6, 2010

Summary

This summary is machine-generated.

Ocean currents significantly impact marine population genetics. Understanding larval dispersal via ocean advection reveals population structure better than traditional methods, aiding conservation efforts.

More Related Videos

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Microbial Communities in Nature and Laboratory - Interview

Microbial Communities in Nature and Laboratory - Interview

Published on: May 28, 2007

Related Experiment Videos

Last Updated: Jun 16, 2026

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Microbial Communities in Nature and Laboratory - Interview

Microbial Communities in Nature and Laboratory - Interview

Published on: May 28, 2007

Area of Science:

Marine Biology
Population Genetics
Oceanography

Background:

Environmental factors are crucial for understanding population genetic structure.
Conventional spatial genetic analyses may not fully capture marine connectivity.

Purpose of the Study:

To investigate how ocean currents influence population genetic structure.
To compare oceanographic-based connectivity with traditional genetic analyses.

Main Methods:

Simulated larval dispersal estimates using ocean current data.
Genetic isolation-by-distance framework incorporating oceanographic distances.
Analysis of multi-generational larval dispersal effects.

Main Results:

Larval exchange frequency and genetic differences were not correlated with Euclidean distance.
Oceanographic distances explained nearly 50% of genetic variance at small scales.
Multi-generational dispersal significantly improved explanatory power.

Conclusions:

Ocean circulation patterns reveal meaningful spatial structuring in populations.
Oceanographic approaches enhance interpretation of genetic data for high gene flow species.
This study offers a novel method for characterizing population connectivity relevant to conservation.