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Rarity-weighted richness: a simple and reliable alternative to integer programming and heuristic algorithms for
Fabio Albuquerque1, Paul Beier1
1School of Forestry, Northern Arizona University, Flagstaff, Arizona, United States of America.
Plos One
|March 18, 2015
Summary
Prioritizing conservation sites using rarity-weighted richness (RWR) effectively identifies key areas for species representation. This simple method is often more efficient than the Zonation software for conservation planning.
Area of Science:
- Conservation science
- Biodiversity informatics
- Spatial planning
Background:
- Identifying optimal sites for conservation is crucial for protecting biodiversity.
- Minimum set and maximum coverage problems are key challenges in conservation prioritization.
- Existing methods like Zonation software and integer programming can be complex or computationally intensive.
Purpose of the Study:
- To evaluate the effectiveness of rarity-weighted richness (RWR) for conservation site prioritization.
- To compare RWR's efficiency against the Zonation software package.
- To determine if RWR can solve minimum set and maximum coverage problems effectively.
Main Methods:
- Prioritizing sites based on rarity-weighted richness (RWR).
- Comparing RWR-prioritized sites with Zonation software-prioritized sites across 11 diverse datasets.
- Analyzing the number of species represented within selected sites.
Main Results:
- RWR prioritization was, on average, more efficient than Zonation solutions across various planning unit sizes.
- RWR successfully identified sites for both minimum set and maximum coverage problems.
- RWR solutions offered a high number of species represented in fewer sites compared to Zonation.
Conclusions:
- Rarity-weighted richness (RWR) provides a simple, reliable, and efficient method for conservation site prioritization.
- RWR is an attractive alternative to complex algorithms for certain conservation planning scenarios.
- The ease of implementation in R or spreadsheets makes RWR a practical tool for conservationists.
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