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Related Concept Videos

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

Formation of Species

Formation of Species

Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.

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).

Pollination and Flower Structure

Pollination and Flower Structure

Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.

Predator-Prey Interactions

Predator-Prey Interactions

Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.

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Related Experiment Video

Updated: May 7, 2025

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea

Published on: November 25, 2016

A Pollen-Based Assisted Migration for Rapid Forest Adaptation.

David Chludil¹, Jaroslav Čepl¹, Arne Steffenrem²

¹Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic.

Global Change Biology

|January 2, 2025

Summary

This summary is machine-generated.

Climate change threatens forests. A novel pollen-based assisted migration strategy introduces climate-adapted genes via seed orchards, balancing local adaptation with resilience for forest ecosystems.

Keywords:

forest nurseries forestry policy gene flow genetic diversity heterosis natural selection phytosanitary risks seed orchards

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Area of Science:

Forestry science
Climate change adaptation
Conservation genetics

Background:

Climate change necessitates innovative forest adaptation strategies.
Traditional assisted migration faces significant environmental, economic, and phytosanitary challenges.
Debate exists between broad assisted migration and local adaptation for forest resilience.

Purpose of the Study:

To propose and evaluate a novel pollen-based assisted migration strategy.
To address limitations of traditional assisted migration methods.
To enhance forest resilience through climate-adapted genetic material introduction.

Main Methods:

Computer simulations to assess genetic implications of pollen-based migration.
Ecological assessment of assisted gene flow, including heterosis and outbreeding depression.
Evaluation of phytosanitary, economic, and legal advantages over seed/seedling transfer.

Main Results:

Pollen-based assisted migration offers a viable middle ground between local adaptation and broad assisted migration.
Simulations indicate manageable genetic implications.
Reduced phytosanitary risks, economic barriers, and legal complexities compared to traditional methods.

Conclusions:

Pollen-based assisted migration can enhance forest resilience by introducing climate-adapted genes.
The strategy integrates with existing seed orchard infrastructure and forestry practices.
Adaptable policies are needed to support pollen-based assisted migration in operational forestry and international projects.