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Related Concept Videos

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...
Conservation of Declining Populations02:07

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 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.
Generalization, Discrimination, and Extinction01:24

Generalization, Discrimination, and Extinction

Generalization, discrimination, and extinction are key concepts in operant conditioning that influence how behaviors are learned and maintained.
Generalization occurs when a behavior reinforced in one context is performed in similar situations. For instance, a student who studies diligently for calculus and receives excellent grades might apply the same study habits to psychology and history, expecting similar results. Generalization shows how learning in one setting can influence behavior in...
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
Ecological Disturbance02:26

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.

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Related Experiment Video

Updated: May 14, 2026

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
11:17

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear

Published on: August 24, 2012

The mechanisms causing extinction debts.

Kristoffer Hylander1, Johan Ehrlén

  • 1Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden. kristoffer.hylander@su.se

Trends in Ecology & Evolution
|February 20, 2013
PubMed
Summary

Extinction debts arise from various habitat changes, not just metapopulation issues. Understanding these diverse mechanisms is crucial for preventing species extinctions.

Area of Science:

  • Ecology
  • Conservation Biology
  • Population Dynamics

Background:

  • Extinction debts are a significant consequence of habitat alteration.
  • Current research often overemphasizes metapopulation dynamics in extinction debt formation.
  • Alternative mechanisms contributing to extinction debts are frequently overlooked.

Purpose of the Study:

  • To highlight that extinction debts arise from diverse mechanisms beyond metapopulation processes.
  • To emphasize the importance of considering multiple factors contributing to extinction debts.
  • To improve understanding and prevention of ultimate extinctions.

Main Methods:

  • Review of current literature on extinction debts.
  • Analysis of non-metapopulation mechanisms causing extinction debts.

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Last Updated: May 14, 2026

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
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  • Conceptual framework integrating extinction debt size and relaxation time.

    • Main Results:

    • Extinction debts can result from survival in resistant life stages.
    • Delayed stochastic extinctions in small populations contribute to extinction debts.
    • Slow colonization-extinction dynamics in metapopulations prolong extinction debts.
    • Failure to differentiate mechanisms and consider relaxation time hinders understanding.

    Conclusions:

    • A broader perspective on extinction debt mechanisms is needed.
    • Considering diverse factors is essential for effective conservation strategies.
    • Improved understanding of extinction debt dynamics can prevent species loss.