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Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Published on: March 9, 2021

Evolutionary constraints mediate extinction risk under climate change.

Guillermo Garcia-Costoya¹, Claire E Williams¹, Trevor M Faske¹

¹University of Nevada, Reno, Reno, Nevada, USA.

Ecology Letters

|February 9, 2023

Summary

This summary is machine-generated.

Evolutionary constraints from genetic correlations can significantly impact ectotherm populations facing climate change. Surprisingly, these constraints sometimes slow population declines, highlighting the need to study genetic architecture for accurate climate change impact forecasts.

Keywords:

climate change evolutionary constraint extinction risk genetic correlation thermal physiology

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Area of Science:

Ecology
Evolutionary Biology
Climate Change Science

Background:

Climate change presents a dual threat to ectotherms through rising mean temperatures and increased thermal variability.
Evolutionary adaptation is a potential mechanism for organisms to cope with environmental change.
Genetic correlations between traits can impose evolutionary constraints, potentially hindering adaptation.

Discussion:

This study uses individual-based simulations to investigate how genetic correlations in thermal physiology affect ectotherm responses to climate change.
The research explores the interplay between genetic architecture and environmental change, specifically focusing on mean temperature and thermal variability.
Findings reveal that genetic correlations significantly influence population dynamics, causing population size declines to vary up to threefold.

Key Insights:

Genetic correlations can profoundly alter population trajectories under climate change scenarios.
Populations with thermal performance curves constrained by genetic correlations sometimes exhibit slower declines than unconstrained populations.
The type of genetic correlation present is a critical factor determining the magnitude of population response.

Outlook:

Understanding the genetic architecture of thermal physiology is crucial for predicting the future of ectotherm populations in a changing climate.
Future research should integrate genetic constraints into ecological forecasting models.
This work underscores the complexity of evolutionary rescue and the importance of genetic factors in species' responses to global warming.