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

Propagation of Waves01:07

Propagation of Waves

2.8K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
2.8K
Travelling Waves01:04

Travelling Waves

6.6K
A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is...
6.6K
Kinetic and Potential Energy of a Wave01:10

Kinetic and Potential Energy of a Wave

6.1K
All forms of waves carry energy; this is directly visualized in nature. For instance, the waves of earthquakes are so intense that they can shake huge concrete buildings, causing them to fall. Loud sounds can damage nerve cells in the inner ear, causing permanent hearing loss. The waves of the oceans can erode beaches. 
In mechanical waves, the amount of energy is related to their amplitude and frequency. In the context of the above examples, large-amplitude earthquakes produce large...
6.1K
Reflection of Waves01:07

Reflection of Waves

4.4K
When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
4.4K
Shock Waves01:16

Shock Waves

2.4K
While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high...
2.4K
Standing Waves01:17

Standing Waves

5.2K
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
5.2K

You might also read

Related Articles

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

Sort by
Same author

Genetic Allee Effects for Controlling Invasive Populations.

Molecular ecology·2026
Same author

Quantifying the potential impact of the cane toad (Rhinella marina) on biodiversity in Australia's Pilbara region.

Scientific reports·2025
Same author

Modelling the Effectiveness of Gene-Edited Salmon at Sea Lice Control and the Use of Refugia to Mitigate Counter-Adaptation.

Evolutionary applications·2025
Same author

Identifying the most effective behavioural assays and predator cues for quantifying anti-predator responses in mammals: a systematic review.

Environmental evidence·2024
Same author

Sustained predation pressure may prevent the loss of anti-predator traits from havened populations.

Ecology and evolution·2024
Same author

Cost-benefit analysis of ecosystem modeling to support fisheries management.

Journal of fish biology·2024
Same journal

Traffic Reduction during COVID-19 Lockdowns Benefited Species Already Tolerant of Noise Pollution: An Acoustic Analysis.

The American naturalist·2026
Same journal

On Pachycephalosaurs, Trade-Offs, and the Historical Genesis of Sociosexual Display Structures.

The American naturalist·2026
Same journal

Structured Landscapes Promote Persistence by Favoring Prudent Predators.

The American naturalist·2026
Same journal

Can Carbon Economy Explain Leaf Dynamic Seasonality in a Tropical Seasonal Rainforest?

The American naturalist·2026
Same journal

Behavior and Physiology Outpace Form When Linking Traits to Ecological Responses within Populations: A Meta-Analysis.

The American naturalist·2026
Same journal

Seminal Fluid Proteins as Regulation Factors for Optimizing Reproduction: A Modeling Approach.

The American naturalist·2026
See all related articles

Related Experiment Video

Updated: Dec 27, 2025

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

9.0K

Evolution Transforms Pushed Waves into Pulled Waves.

Philip Erm, Ben L Phillips

    The American Naturalist
    |February 26, 2020
    PubMed
    Summary
    This summary is machine-generated.

    Vanguard invaders evolve resistance to the Allee effect, accelerating invasions. This evolution transforms invasions from pushed waves to pulled waves, fundamentally altering dynamics.

    Keywords:
    Allee effectbiological invasionevolutioninvasion speedpushed/pulled wave

    More Related Videos

    Live Imaging and Analysis of Muscle Contractions in Drosophila Embryo
    07:18

    Live Imaging and Analysis of Muscle Contractions in Drosophila Embryo

    Published on: July 9, 2019

    6.3K
    Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
    09:37

    Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

    Published on: August 26, 2019

    6.0K

    Related Experiment Videos

    Last Updated: Dec 27, 2025

    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
    08:54

    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

    Published on: February 13, 2018

    9.0K
    Live Imaging and Analysis of Muscle Contractions in Drosophila Embryo
    07:18

    Live Imaging and Analysis of Muscle Contractions in Drosophila Embryo

    Published on: July 9, 2019

    6.3K
    Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
    09:37

    Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

    Published on: August 26, 2019

    6.0K

    Area of Science:

    • Ecology
    • Evolutionary Biology
    • Mathematical Biology

    Background:

    • The Allee effect, reduced fitness in low-density populations, impacts invasion dynamics.
    • Evolution of invader Allee effect susceptibility is poorly understood.
    • Invasion fronts present selection for Allee effect resistance.

    Purpose of the Study:

    • To investigate if invader Allee effect resistance evolves during invasions.
    • To determine the impact of evolving Allee effect resistance on invasion dynamics.

    Main Methods:

    • Developed an individual-based model.
    • Incorporated evolution of Allee effect resistance trait.
    • Simulated invasion dynamics under evolving resistance.

    Main Results:

    • Vanguard invaders evolved significant resistance to the Allee effect.
    • Evolved resistance led to invasion acceleration.
    • Invasions transitioned from pushed waves to pulled waves.

    Conclusions:

    • Evolution of Allee effect resistance is a key factor in invasion dynamics.
    • Accounting for evolution is crucial for accurate invasion forecasting.
    • Evolution can fundamentally alter invasion speed and population structure.