The functional decoupling of processes in alpine ecosystems under climate change

Area of Science:

• Ecology
• Climate Change Biology
• Ecosystem Science

Background:

• High elevation ecosystems face potential functional decoupling between above-ground and below-ground components due to climate change.
• A trade-off exists between cold tolerance and metabolic rates in alpine organisms, affecting ecological processes like decomposition and herbivory.

Purpose of the Study:

• To investigate the potential for climate change to drive functional decoupling in high elevation ecosystems.
• To model how differential rates of evolution or dispersal among ecosystem agents could alter element fluxes.

Main Methods:

• Utilized a mechanistic model based on metabolic theory to simulate agent efficiency.
• Explored the consequences of varying dispersal and evolution rates across ecosystem compartments.

Main Results:

• Model suggests that faster evolution or dispersal in one compartment can lead to novel, more efficient ecosystem functions.
• This differential response can increase element fluxes within specific compartments of alpine systems.

Conclusions:

• Climate change may promote the decoupling of high elevation ecosystem functions, altering biogeochemical cycles.
• Systematic measurement of agent efficiency along elevation gradients is crucial for forecasting these changes.
• Future research should focus on the impacts of dispersal and evolution on ecosystem processes under climate change.