Evolutionary adaptation of high-diversity communities to changing environments

Area of Science:

• Ecology
• Evolutionary Biology
• Theoretical Ecology

Background:

• Understanding how environmental changes impact biodiversity and evolutionary trajectories is crucial.
• Adaptive dynamics models offer a framework to study ecological and evolutionary processes in communities.

Purpose of the Study:

• To investigate the effects of abiotic environmental changes on evolutionary dynamics and diversity in evolving communities.
• To determine the role of the rate of environmental change in community survival and adaptation.

Main Methods:

• Utilized adaptive dynamics models based on the logistic competition model.
• Implemented environmental changes as a temporal shift in carrying capacity, dependent on phenotype.

Main Results:

• Environmental changes generally led to decreased species richness, population size, and phenotypic diversity.
• The rate of environmental change critically influenced community persistence, with a threshold determining adaptation versus extinction.
• Communities could adapt to gradual environmental changes, converging to new stable states and restoring diversity post-change.

Conclusions:

• Environmental shifts pose significant challenges to community stability and diversity.
• The rate of environmental change is a key factor in evolutionary rescue or extinction.
• Adaptive capacity allows communities to persist and recover under specific environmental change scenarios.