Cool microrefugia accumulate and conserve biodiversity under climate change

Area of Science:

• Ecology
• Climate Change Biology
• Conservation Science

Background:

• Climate change impacts vary globally, with microclimates often overlooked due to mapping difficulties.
• Understanding microclimate variation is essential for accurate ecological forecasting.

Purpose of the Study:

• To map microclimates in a freshwater rock pool ecosystem.
• To evaluate how microclimate data alters predictions of climate change impacts on aquatic invertebrates.
• To assess the effectiveness of microclimate-based conservation strategies.

Main Methods:

• Mapping microclimates within a freshwater rock pool ecosystem.
• Developing predictive models for aquatic invertebrate occupancy and persistence under climate change scenarios, with and without microclimate data.
• Simulating conservation strategies based on microclimate data versus current biodiversity metrics.

Main Results:

• Microclimates show significant temperature differences (9.9-11.6°C) over short distances.
• Future climate change may increase microclimate variation.
• Accounting for microclimates drastically alters predictions, showing reduced thermophilization and higher persistence for cold-adapted taxa.
• Cool microclimates are predicted to become future biodiversity hotspots.
• Protecting the coolest microclimates is far more effective for conserving taxa than protecting currently biodiverse sites.

Conclusions:

• Microclimate mapping is critical for understanding and predicting climate change impacts on biodiversity.
• Conservation strategies must incorporate microclimate data for future effectiveness.
• Cool microclimates are vital refugia and essential for biodiversity conservation efforts.