Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
Microbial Phylogeny01:28

Microbial Phylogeny

Understanding the evolutionary relationships among microorganisms is fundamental to microbial ecology and taxonomy. Phylogenetic trees are essential tools for inferring these relationships, relying primarily on comparative analyses of molecular sequences such as DNA, RNA, or proteins. In microbial studies, these trees typically depict the evolutionary paths of diverse bacterial and archaeal species by mapping genetic differences accumulated over time.Phylogenetic trees are composed of tips,...
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...
Habitat Fragmentation02:31

Habitat Fragmentation

Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
Genetics of Speciation02:16

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...
Phylogenetic Trees03:21

Phylogenetic Trees

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.The length of the branches can depict time or the relative amount of change among organisms. For instance, the branch length might indicate the number of amino acid changes in the sequence that underlies the...

You might also read

Related Articles

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

Sort by
Same author

Green, renewable, or low-carbon? A framework for informed solvent selection in pharmaceutical sciences.

Journal of pharmaceutical sciences·2026
Same author

Recreational Drug Use Amongst Children and Adolescents Presenting to Australian Emergency Departments With Acute Behavioural Disturbance: A Secondary Analysis of a Randomised Controlled Trial.

Emergency medicine Australasia : EMA·2026
Same author

SARS-CoV-2 Ancestral and Omicron variant immunity in Australian children in 2023, a seroprevalence study.

Vaccine·2026
Same author

Serum Glucose and Ketone Concentrations in Fasted Children Aged 6-12 Months Having Elective Surgery.

Paediatric anaesthesia·2026
Same author

Postanesthesia Apnea in Former Preterm Infants for Inguinal Herniorrhaphy: An Update of Risk Factors from an Individual Participant Data Meta-analysis.

Anesthesiology·2026
Same author

Intranasal Treatments for Children With Sleep-Disordered Breathing: The MIST+ Randomized Clinical Trial.

JAMA pediatrics·2026

Related Experiment Video

Updated: Jun 24, 2026

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
06:37

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

Do landscape processes predict phylogeographic patterns in the wood frog?

Julie A Lee-Yaw1, Andrew Davidson, Brad H McRae

  • 1Department of Zoology, University of British Columbia, BC, Canada. lee-yaw@zoology.ubc.ca

Molecular Ecology
|March 24, 2009
PubMed
Summary

Landscape features influence wood frog (Lithobates sylvaticus) dispersal, but regional genetic structure is best explained by absolute barriers, not fine-scale habitat variables. This highlights scale-dependent effects on population connectivity.

More Related Videos

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians
04:37

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians

Published on: May 12, 2019

Using Terminal Transferase-mediated dUTP Nick End-labelling (TUNEL) and Caspase 3/7 Assays to Measure Epidermal Cell Death in Frogs with Chytridiomycosis
07:37

Using Terminal Transferase-mediated dUTP Nick End-labelling (TUNEL) and Caspase 3/7 Assays to Measure Epidermal Cell Death in Frogs with Chytridiomycosis

Published on: May 16, 2018

Related Experiment Videos

Last Updated: Jun 24, 2026

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
06:37

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians
04:37

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians

Published on: May 12, 2019

Using Terminal Transferase-mediated dUTP Nick End-labelling (TUNEL) and Caspase 3/7 Assays to Measure Epidermal Cell Death in Frogs with Chytridiomycosis
07:37

Using Terminal Transferase-mediated dUTP Nick End-labelling (TUNEL) and Caspase 3/7 Assays to Measure Epidermal Cell Death in Frogs with Chytridiomycosis

Published on: May 16, 2018

Area of Science:

  • Molecular Ecology
  • Population Genetics
  • Landscape Genetics

Background:

  • Population connectivity and genetic variation are key in molecular ecology.
  • High-resolution geographic data enable landscape effect quantification on dispersal and genetic structure.
  • Linking fine-scale (landscape genetics) and broad-scale (phylogeography) processes remains challenging.

Purpose of the Study:

  • To test if fine-scale landscape factors influencing wood frog dispersal correlate with regional genetic structure.
  • To evaluate the predictive power of landscape resistance models against a landscape-free isolation-by-resistance model.

Main Methods:

  • Generated landscape resistance matrices using electrical circuit theory based on slope, wetness index, land cover, and absolute barriers.
  • Assessed correlations between resistance matrices and genetic structure using six microsatellite markers.
  • Compared landscape-based models with a null model of isolation by resistance.

Main Results:

  • Significant regional genetic structure was observed in wood frog populations.
  • Topography and intervening habitat variables poorly explained genetic structure patterns.
  • Absolute dispersal barriers were the strongest predictor of regional genetic structure.

Conclusions:

  • Fine-scale landscape variables influencing dispersal do not necessarily predict broader-scale genetic structure.
  • Absolute barriers are more critical than habitat characteristics for regional wood frog genetic connectivity.
  • Scale-dependent processes are crucial for understanding population genetics.