Co-extinctions annihilate planetary life during extreme environmental change

Area of Science:

• Ecology
• Climate Science
• Conservation Biology

Background:

• Biodiversity is declining at an unprecedented rate due to climate change and human activities.
• Co-extinction, the loss of dependent species following resource depletion, is increasingly recognized as a major driver of biodiversity loss.
• Empirical data on co-extinction events are challenging to obtain, complicating assessments of their impact.

Purpose of the Study:

• To quantify the impact of co-extinction on overall species loss.
• To model the effects of environmental change (global heating and cooling) on biodiversity, considering ecological dependencies.

Main Methods:

• Utilized a large set of virtual Earth simulations.
• Simulated various trajectories of extreme environmental change.
• Tracked species loss with and without accounting for co-extinction processes.

Main Results:

• Ecological dependencies were found to amplify the direct effects of environmental change on biodiversity collapse.
• Co-extinction processes can increase species loss by up to ten times compared to direct environmental effects alone.
• Simulations tracked species loss through to the complete annihilation of all life under different environmental scenarios.

Conclusions:

• Co-extinction is a critical, often underestimated, factor in mass extinction events.
• Understanding and incorporating ecological interactions is vital for accurate biodiversity loss predictions.
• Mitigating climate change and protecting ecological networks are essential for preserving planetary biodiversity.