Genetic diversity loss in the Anthropocene

Area of Science:

• Ecology
• Population Genetics
• Conservation Biology

Background:

• Habitat loss and climate change are causing species range reductions and increasing extinction risk.
• Loss of genetic diversity hinders species' adaptability and long-term survival.
• Predictive tools for estimating global genetic diversity loss are lacking.

Purpose of the Study:

• To develop a mathematical framework for predicting genetic diversity loss due to decreasing habitat.
• To quantify the loss of naturally occurring DNA mutations with habitat reduction.
• To estimate current genetic diversity loss across various species and ecosystems.

Main Methods:

• Analysis of genomic variation in 10,095 individuals from 20 plant and animal species.
• Application of a novel mathematical framework integrating biodiversity theory and population genetics.
• Utilizing a mutations-area relationship power law to model genetic diversity.

Main Results:

• Genome-wide genetic diversity follows a power law relationship with geographic area.
• This relationship accurately predicts genetic diversity loss from local population extinctions.
• An estimated 10% of genetic diversity may already be lost for numerous species.

Conclusions:

• The developed framework provides a predictive tool for assessing genetic diversity loss.
• Current genetic diversity loss exceeds international conservation targets.
• Urgent conservation strategies are needed to preserve genetic diversity in the face of habitat loss.