Eradication thresholds in epidemiology, conservation biology and genetics

Area of Science:

• Evolutionary biology
• Epidemiology
• Genetics

Background:

• Metapopulation dynamics, infectious disease spread, and transposable element (TE) dynamics are complex phenomena.
• Transposable elements are often considered intragenomic parasites, influencing host evolution.
• Existing models may not fully capture the interconnectedness of these systems.

Purpose of the Study:

• To develop a unified model describing metapopulation dynamics, infectious disease spread, and transposable element (TE) dynamics.
• To derive and interpret eradication thresholds applicable across these diverse systems.
• To apply epidemiological concepts to explain evolutionary patterns of TEs.

Main Methods:

• Development of a simple, unifying mathematical model.
• Derivation of eradication thresholds from the common model.
• Interpretation of thresholds within the context of disease spread and TE evolution.

Main Results:

• A single model effectively describes the dynamics of metapopulations, infectious diseases, and TEs.
• Common eradication thresholds were identified and interpreted for each system.
• Epidemiological insights, specifically eradication thresholds, provide explanations for TE distribution in host phylogenies.

Conclusions:

• Underlying common dynamics exist across seemingly disparate biological systems like disease spread and TE evolution.
• The concept of eradication thresholds, derived from epidemiology, offers a novel framework for understanding TE evolutionary dynamics.
• This approach can resolve evolutionary puzzles, such as the phylogenetic distribution of TE families.