Preserving the evolutionary potential of floras in biodiversity hotspots

Félix Forest, Richard Grenyer, Mathieu Rouget, T. Jonathan Davies, Richard M. Cowling, Daniel P. Faith, Andrew Balmford, John C. Manning, Şerban Procheş, Michelle Van Der Bank, Gail Reeves, Terry A.J. Hedderson, Vincent Savolainen

Research output: Contribution to journalArticlepeer-review

745 Citations (Scopus)


One of the biggest challenges for conservation biology is to provide conservation planners with ways to prioritize effort. Much attention has been focused on biodiversity hotspots. However, the conservation of evolutionary process is now also acknowledged as a priority in the face of global change. Phylogenetic diversity (PD) is a biodiversity index that measures the length of evolutionary pathways that connect a given set of taxa. PD therefore identifies sets of taxa that maximize the accumulation of 'feature diversity'. Recent studies, however, concluded that taxon richness is a good surrogate for PD. Here we show taxon richness to be decoupled from PD, using a biome-wide phylogenetic analysis of the flora of an undisputed biodiversity hotspot - the Cape of South Africa. We demonstrate that this decoupling has real-world importance for conservation planning. Finally, using a database of medicinal and economic plant use, we demonstrate that PD protection is the best strategy for preserving feature diversity in the Cape. We should be able to use PD to identify those key regions that maximize future options, both for the continuing evolution of life on Earth and for the benefit of society.

Original languageEnglish
Pages (from-to)757-760
Number of pages4
Issue number7129
Publication statusPublished - 15 Feb 2007

ASJC Scopus subject areas

  • Multidisciplinary


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