Evolution beyond allele frequency changes and the case study of amphibians

Area of Science:

• Evolutionary biology
• Conservation science
• Genetics

Background:

• Evolutionary processes and causes of change are debated, impacting biodiversity conservation.
• Amphibians face unprecedented threats from disease and environmental change, with variable population outcomes.
• Understanding adaptive variation is crucial for predicting species' fate.

Purpose of the Study:

• To propose a novel evolutionary framework integrating non-genetic mechanisms for adaptive variation.
• To explore telomere length and epigenetic pattern changes as sources of heritable adaptive variation.
• To estimate the future trajectory of amphibian populations facing environmental perturbations.

Main Methods:

• Conceptual framework development.
• Exploration of non-genetic inheritance mechanisms (telomere length, epigenetics).
• Application to amphibian-pathogen systems.

Main Results:

• A new conceptual evolutionary framework is proposed.
• Non-genetic mechanisms (telomere length, epigenetic changes) are identified as potential sources of heritable adaptive variation.
• The framework aids in estimating amphibian population fate.

Conclusions:

• Evolution and conservation are increasingly intertwined disciplines.
• Non-genetic inheritance plays a key role in adaptive evolution and conservation.
• This framework offers insights into amphibian resilience and extinction risks.