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Spatial incongruence among hotspots and complementary areas of tree diversity in southern Africa

Published on Jul 1, 2015in Diversity and Distributions4.092
· DOI :10.1111/ddi.12290
Barnabas H. Daru16
Estimated H-index: 16
(UJ: University of Johannesburg),
Michelle van der Bank23
Estimated H-index: 23
(UJ: University of Johannesburg),
T. Jonathan Davies23
Estimated H-index: 23
(McGill University)
Source
Abstract
Aim Biodiversity hotspots have important roles in conservation prioritisation, but efficient methods for selecting among them remain debated. Location Southern Africa. Methods In this study, we used data on the dated phylogeny and geographical distribution of 1400 tree species in southern Africa to map regional hotspots of species richness (SR), phylogenetic diversity (PD), phylogenetic endemism (PE), species endemism (CWE), and evolutionary distinctiveness and global endangerment (EDGE). In addition, we evaluated the efficiency of hotspots in capturing complementary areas of species richness and phylogenetic diversity. We examined the spatial overlap among hotspots for each metric, and review how well one metric may serve as a surrogate for others. We then evaluated the effectiveness of current conservation areas in capturing these different facets of diversity and complementary areas. Lastly, we explored the environmental factors influencing the distribution of these diversity metrics in southern Africa. Results We reveal large spatial incongruence between biodiversity indices, resulting in unequal representation of PD, SR, PE, CWE and EDGE in hotspots and currently protected areas. Notably, no hotspot area is shared among all five measures, and 69% of hotspot areas were unique to a single diversity metric. Areas selected using complementarity are even more dispersed, but capture rare diversity that is overlooked by the hotspot approach.
  • References (51)
  • Citations (28)
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References51
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#2T. Jonathan Davies (McGill University)H-Index: 23
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Government of Canada through Genome Canada and the Ontario Genomics Institute (2008-OGI-ICI-03), the International Development Research Centre (IDRC), Canada and the University of Johannesburg.
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#1Florent MazelH-Index: 16
#2François Guilhaumon (University of Montpellier)H-Index: 25
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Aim To define biome-scale hotspots of phylogenetic and functional mammalian biodiversity (PD and FD, respectively) and compare them to ‘classical’ hotspots based on species richness (SR) only.
48 CitationsSource
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Assessing spatial patterns of biodiversity using phylogenetic methods is a promising approach for conservation planning. Here, Mishler et al. develop a method to distinguish between recent and old endemism and provide new insights about biodiversity across space and time for the Australian Acacia.
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The protection of areas that shelter high evolutionary diversity represented by geographically and phylogenetically isolated lineages is becoming an important conservation strategy. Nevertheless, the spatial distribution of this component of biodiversity is still unknown for most groups, which limits its application for selecting priority areas to conserve. In the present study, we reconstructed the phylogeny of Minaria (Apocynaceae) based on plastid (trnH-psbA, rps16, trnS-trnG and trnD-trnT) a...
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Key goals of conservation are to protect both species and the functional and genetic diversity they represent. A strictly species-based approach may underrepresent rare, threatened, or genetically distinct species and overrepresent widespread species. Although reserves are created for a number of reasons, including economic, cultural, and ecological reasons, their efficacy has been measured primarily in terms of how well species richness is protected, and it is useful to compare how well they pr...
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Mapping diversity hotspots of key species, such as the crop wild relatives, is an essential task for their conservation and for their further exploration. In this paper, we develop and apply methods to locate centres of species richness (SR), endemism, phylogenetic diversity and phylogenetic endemism (PE) for the Australian perennial diploid species of Glycine (Fabaceae). The study taxa are congeneric with the cultivated soybean Glycine max. The DNA sequence data for the phylogenetic analysis ar...
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