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Methods for prioritizing protected areas using individual and aggregate rankings

  • Fabio Carvalho (a1), Kerry A Brown (a2), Adam D Gordon (a3), Gabriel U Yesuf (a1), Marie Jeanne Raherilalao (a4) (a5), Achille P Raselimanana (a4) (a5), Voahangy Soarimalala (a4) (a6) and Steven M Goodman (a4) (a7)...

Abstract

Despite their legal protection status, protected areas (PAs) can benefit from priority ranks when ongoing threats to their biodiversity and habitats outpace the financial resources available for their conservation. It is essential to develop methods to prioritize PAs that are not computationally demanding in order to suit stakeholders in developing countries where technical and financial resources are limited. We used expert knowledge-derived biodiversity measures to generate individual and aggregate priority ranks of 98 mostly terrestrial PAs on Madagascar. The five variables used were state of knowledge (SoK), forest loss, forest loss acceleration, PA size and relative species diversity, estimated by using standardized residuals from negative binomial models of SoK regressed onto species diversity. We compared our aggregate ranks generated using unweighted averages and principal component analysis (PCA) applied to each individual variable with those generated via Markov chain (MC) and PageRank algorithms. SoK significantly affected the measure of species diversity and highlighted areas where more research effort was needed. The unweighted- and PCA-derived ranks were strongly correlated, as were the MC and PageRank ranks. However, the former two were weakly correlated with the latter two. We recommend using these methods simultaneously in order to provide decision-makers with the flexibility to prioritize those PAs in need of additional research and conservation efforts.

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Copyright

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Corresponding author

Author for correspondence: Dr Fabio Carvalho, Email: fabiocgs@yahoo.com

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Methods for prioritizing protected areas using individual and aggregate rankings

  • Fabio Carvalho (a1), Kerry A Brown (a2), Adam D Gordon (a3), Gabriel U Yesuf (a1), Marie Jeanne Raherilalao (a4) (a5), Achille P Raselimanana (a4) (a5), Voahangy Soarimalala (a4) (a6) and Steven M Goodman (a4) (a7)...

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