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

Population Growth

Population Growth

Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.However, realistic environmental conditions limit the number of...

Threats to Biodiversity

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...

What is Conservation Biology?

What is Conservation Biology?

Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.

Conservation of Small Populations

Conservation of Small Populations

Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less likely to...

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.

Habitat Fragmentation

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.

You might also read

Related Articles

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

Sort by

Same author

Negative relationships between species richness and temporal variability are common but weak in natural systems.

Ecology·2018

Same author

Heterogeneous responses of temperate-zone amphibian populations to climate change complicates conservation planning.

Scientific reports·2017

Same author

Optimal alpha reduces error rates in gene expression studies: a meta-analysis approach.

BMC bioinformatics·2017

Same author

Ranid Herpesvirus 3 and Proliferative Dermatitis in Free-Ranging Wild Common Frogs (Rana Temporaria).

Veterinary pathology·2017

Same author

Assessing and monitoring the effects of filter material amendments on the biophysicochemical properties during composting of solid winery waste under open field and varying climatic conditions.

Waste management (New York, N.Y.)·2016

Same author

The impact of medical errors on Swiss anaesthesiologists: a cross-sectional survey.

Acta anaesthesiologica Scandinavica·2015

Search research articles

Related Experiment Video

Updated: Jun 13, 2026

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

Published on: March 13, 2011

Quantitative evidence for global amphibian population declines.

J E Houlahan¹, C S Findlay, B R Schmidt

¹Ottawa-Carleton Institute of Biology, University of Ottawa, Ontario, Canada. jeffhoul@science.uottawa.ca

|April 28, 2000

Summary

Global amphibian populations show significant declines, particularly from the 1960s. Despite geographical variations, this trend has persisted for decades, impacting amphibian conservation efforts worldwide.

More Related Videos

An Integrated Micro-Device System for Coral Growth and Monitoring

An Integrated Micro-Device System for Coral Growth and Monitoring

Published on: July 21, 2023

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

Related Experiment Videos

Last Updated: Jun 13, 2026

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

Published on: March 13, 2011

An Integrated Micro-Device System for Coral Growth and Monitoring

An Integrated Micro-Device System for Coral Growth and Monitoring

Published on: July 21, 2023

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

Area of Science:

Ecology and Conservation Biology
Zoology
Environmental Science

Background:

Growing global concern regarding amphibian population declines.
Existing evidence often relies on anecdotal data or limited-scale, short-term studies.
Challenges in detecting long-term trends due to natural population variability and inferring global patterns from local data.

Purpose of the Study:

To assess large-scale temporal and spatial variations in amphibian population trends.
To provide a more robust understanding of amphibian population dynamics globally.
To address the validity of inferring global trends from regional studies.

Main Methods:

Utilized data from 936 amphibian populations worldwide.
Analyzed temporal trends across different geographical regions.
Examined spatial variations in population dynamics over several decades.

Main Results:

Observed rapid global amphibian declines from the late 1950s/early 1960s to the late 1960s.
Noted a reduced rate of decline from the late 1960s to the present.
Identified negative trends in Western Europe and North America during the 1960s, with North American populations continuing to decline until the late 1990s.

Conclusions:

Amphibian populations are declining globally, with trends evident for several decades.
Large-scale amphibian population trends exhibit significant geographical and temporal variability.
The findings underscore the need for continued monitoring and conservation strategies for amphibians.