Joint evolution of dispersal and connectivity.

Area of Science:

• Ecology
• Evolutionary Biology
• Population Dynamics

Background:

• Functional connectivity is vital for population persistence in fragmented landscapes.
• Evolutionary studies often focus on dispersal propensity, neglecting traits influencing disperser distribution.
• Understanding how evolution shapes functional connectivity is crucial for conservation.

Purpose of the Study:

• To model how evolution shapes functional connectivity in heterogeneous landscapes.
• To investigate the role of site clustering and isolation on dispersal evolution.
• To identify key traits under selection that influence population connectivity.

Main Methods:

• A simple mathematical model was developed to simulate population dynamics and evolution.
• The model incorporated heterogeneous landscapes with clustered and solitary sites.
• Evolutionary stable strategies were analyzed under varying structural connectivity.

Main Results:

• Evolutionarily stable populations showed strains differentiated by connectivity patterns (local vs. global dispersal).
• Selection favored diversification in dispersal patterns, not necessarily dispersal rates.
• Solitary, isolated sites were found to be critical for maintaining global dispersal.

Conclusions:

• Evolution drives diversification in dispersal strategies, emphasizing connectivity patterns.
• Habitat heterogeneity, particularly solitary sites, plays a key role in maintaining functional connectivity.
• Conservation strategies should consider the role of seemingly isolated habitats in supporting metapopulation dynamics.