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Related Concept Videos

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...

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.

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.

Speciation Rates

Speciation Rates

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.

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).

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Related Experiment Video

Updated: Nov 3, 2025

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Evolutionary Dynamics of Wild Populations.

Delphine Legrand¹, Simon Blanchet¹

¹Station d'Ecologie Théorique et Expérimentale, UPR5321, CNRS, 09200 Moulis, France.

|June 2, 2021

Summary

Wild animal populations face extreme environmental changes due to human activities. Understanding these impacts is crucial for conservation efforts and biodiversity preservation.

Area of Science:

Ecology
Environmental Science
Conservation Biology

Background:

Wild populations confront accelerating environmental shifts.
Human activities significantly intensify these environmental challenges.

Discussion:

Investigating the multifaceted impacts of anthropogenic pressures on wildlife.
Analyzing the ecological consequences of rapid environmental change for species survival.

Key Insights:

Environmental changes driven by human actions pose significant threats to wild populations.
Urgent need for research into species' adaptive capacities and resilience.

Outlook:

Developing effective conservation strategies to mitigate human impacts.

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Promoting sustainable practices to ensure long-term biodiversity persistence.