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Preserving the evolutionary potential of floras in biodiversity hotspots.
- Source :
-
Nature [Nature] 2007 Feb 15; Vol. 445 (7129), pp. 757-60. - Publication Year :
- 2007
-
Abstract
- 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.
- Subjects :
- Greenhouse Effect
Molecular Sequence Data
Phylogeny
Plants classification
Plants genetics
Plants, Medicinal classification
Plants, Medicinal genetics
Plants, Medicinal physiology
Population Density
South Africa
Biodiversity
Biological Evolution
Conservation of Natural Resources methods
Plant Physiological Phenomena
Subjects
Details
- Language :
- English
- ISSN :
- 1476-4687
- Volume :
- 445
- Issue :
- 7129
- Database :
- MEDLINE
- Journal :
- Nature
- Publication Type :
- Academic Journal
- Accession number :
- 17301791
- Full Text :
- https://doi.org/10.1038/nature05587