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Adaptive evolutionary conservation: towards a unified concept for defining conservation units
1GIROQ, Département de Biologie, Pavillon Vachon, Université Laval, Sainte-Foy, QC, G1K 7P4, Canada.
Molecular Ecology
|March 21, 2002
Summary
Defining evolutionarily significant units (ESUs) is crucial for conservation. This study proposes a unified ESU concept, emphasizing adaptive criteria for effective conservation strategies below the species level.
Area of Science:
- Conservation Biology
- Evolutionary Biology
- Genetics
Background:
- Objective prioritization of conservation value below the species level is debated.
- The evolutionarily significant unit (ESU) is a prominent concept in this discussion.
- Existing ESU concepts present conflicting definitions and criteria.
Purpose of the Study:
- To review existing evolutionarily significant unit (ESU) concepts.
- To propose a more unified ESU concept reconciling opposing views.
- To introduce a context-based framework for delineating ESUs.
Main Methods:
- Literature review of ESU concepts.
- Analysis of differing criteria used in ESU definitions.
- Development of a context-based framework for ESU delineation.
Main Results:
- Conflicting ESU concepts share a common goal: defining measurable segments of species divergence.
- Differences in ESU concepts stem from criteria, not fundamental essence.
- A context-based framework allows flexible use of criteria for ESU delineation.
Conclusions:
- A unified ESU concept is achievable by acknowledging the dynamic utility of various criteria.
- The proposed framework supports adaptive evolutionary conservation strategies.
- Flexible application of criteria, alone or combined, is key to effective ESU delineation.