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PLOS ONE  2013 

Shifts in Climate Foster Exceptional Opportunities for Species Radiation: The Case of South African Geraniums

DOI: 10.1371/journal.pone.0083087

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Abstract:

Climate change is often assumed to be a major driver of biodiversity loss. However, it can also set the stage for novel diversification in lineages with the evolutionary ability to colonize new environments. Here we tested if the extraordinary evolutionary success of the genus Pelargonium was related to the ability of its species to capitalize on the climate niche variation produced by the historical changes in southern Africa. We evaluated the relationship between rates of climate niche evolution and diversification rates in the main Pelargonium lineages and disentangled the roles of deep and recent historical events in the modification of species niches. Pelargonium clades exhibiting higher ecological differentiation along summer precipitation (SPP) gradients also experienced higher diversification rates. Faster rates of niche differentiation in spatially structured variables, along with lower levels of niche overlap among closely related species, suggest recent modification in species niches (e.g. dispersal or range shift) and niche lability. We suggest that highly structured SPP gradients established during the aridification process within southern Africa, in concert with niche lability and low niche overlap, contributed to species divergence. These factors are likely to be responsible for the extensive diversification of other lineages in this diversity hot spot.

References

[1]  Holt RD (1990) Microevolutionary consequences of climate change. Trends in Ecology and Evolution 9: 311–315.
[2]  Kozak KH, Wiens JJ (2010) Accelerated rates of climatic-niche evolution underlie rapid species diversification. Ecology Letters 13: 1378–1389.
[3]  Losos JB (2008) Phylogenetic niche conservatism, phylogenetic signal and the relationship between phylogenetic relatedness and ecological similarity among species. Ecology Letters 11: 995–1007.
[4]  Kozak KH, Weisrock DW, Larson A (2006) Rapid lineage accumulation in a non-adaptive radiation: phylogenetic analysis of diversification rates in eastern North American woodland salamanders (Plethodontidae: Plethodon). Proceedings of the Royal Society of London B 273: 539–546.
[5]  Wiens JJ, Graham CH (2005) Niche conservatism:integrating evolution, ecology, and conservation biology. Annual Review of Ecology, Evolution and Systematics 36: 516–539.
[6]  Schluter D (2000) The ecology of adaptive radiation. Oxford: Oxford University Press.
[7]  Adams DC, Berns CM, Kozak KH, Wiens JJ (2009) Are rates of species diversification correlated with rates of morphological evolution? Proceedings of the Royal Society of London B 276: 2729–2738.
[8]  Freckleton RP, Jetz W (2009) Space versus phylogeny: disentangling phylogenetic and spatial signals in comparative data. Proceedings of the Royal Society of London B 276: 21–30.
[9]  Peres-Neto PR, Leibold MA, Dray S (2012) Assesing the effects of spatial contingency and environmental filtering on metacommunity phylogenetics. Ecology 93: 14–30.
[10]  Cooper N, Freckleton RP, Jetz W (2011) Phylogenetic conservatism of environmental niches in mammals. Proceedings of the Royal Society of London B 278: 2384–2391.
[11]  Siesser WG (1980) Late Miocene origin of Benguela upwelling system off northern Namibia. Science 208: 283–285.
[12]  Zachos J, Pagani M, Sloan L, Thomas E, Billups K (2001) Trends, rhythms, and aberrations in global climate 65 Ma to present. Science 292: 686–693.
[13]  Bakker FT, Culham A, Marais EM, Gibby M (2005) Nested radiation in Cape Pelargonium. In: Bakker FT, Chartrou LW, Gravendeel B, Pielser PB, Plant species-level systematics: New perspectives on pattern and process. Ruggell, Liechtstein: Ganter Verlag K. G.
[14]  Verboom GA, Archibald JK, Bakker FT, Bellstedt DU, Conrad F, et al. (2009) Origin and diversification of the Greater Cape flora: Ancient species repository, hot-bed of recent radiation, or both?. Molecular Phylogenetics and Evolution 51: 44–53.
[15]  Linder HP (2003) The radiation of the Cape flora, southern Africa. Biological Reviews of the Cambridge Philosophical Society 78: 597–638.
[16]  Verboom GA, Linder HP, Stock DW (2004) Testing the adaptive nature of radiation: growth form and life history divergence in the African grass genus Ehrharta. American Journal of Botany 91: 1364–1370.
[17]  Cowling RM, Richardson DM, Pierce SM (1997) Vegetation of southern Africa. Cape Town, South Africa: Cambridge University Press.
[18]  Linder HP (1991) Environmental correlates of patterns of species richness in the south-western Cape Province of South Africa. Journal of Biogeography 18: 509–518.
[19]  Thuiller W, Midgley GF, Rouget M, Cowling RM (2006) Predicting patterns of plant species richness in megadiverse South Africa. Ecography: 733–744.
[20]  Martínez-Cabrera HI (2010) Influence of climate in functional and species diversifi cation in South African Pelargonium. Storrs: University of Connecticut.
[21]  Martínez-Cabrera HI, Schlichting CD, Silander JA, Jones CS (2012) Low levels of climate niche conservatism may explain clade diversity patterns in the South African genus Pelargonium (Geraniaceae). American Journal of Botany 99: 954–960.
[22]  Jones CS, Bakker FT, Schlichting CD, Nicotra AB (2009) Leaf shape evolution in the South African genus Pelargonium L'Hér. (Geraniaceae). Evolution 63: 479–497.
[23]  Losos JB, Miles DB (2002) Testing the hypothesis that a clade has adaptively radiated: iguanid lizard clades as a case study. American Naturalist 160: 147–157.
[24]  Phillimore AB, Price TD (2008) Density-dependent cladogenesis in birds. PLoS Biology 3: e71.
[25]  Rabosky DL, Lovette IJ (2008) Density-dependent diversification in North American wood warblers. Proceedings of the Royal Society of London B 275: 2363–2371.
[26]  Bakker FT, Culham A, Touloumenidou T, Gibby M (2004) Phylogeny of Pelargonium (Geraniaceae) based on DNA sequences from three genomes. Taxon 53: 17–28.
[27]  Morris JW, Glen HF (1978) Précis, the National Herbarium of South Africa (PRE) Computerized Information System.
[28]  Rutherford MC, Powrie LW, Midgley GF (2003) ACKDAT: a digital spatial database of distributions of South African plant species and species assemblages. South African Journal of Botany 69: 99–104.
[29]  Sanderson MJ (2002) Estimating absolute rates of molecular evolution and divergence times: a penalized likelihood approach. Molecular Biology and Evolution 19: 101–109.
[30]  Paradis E, Claude J, Strimmer K (2004) APE: analyses of phylogenetics and evolution in R language. Bioinformatics 20: 289–290.
[31]  Schulze RE (2007) South African Atlas of Climatology and Agrohydrology. In: Commission WR, Pretoria.
[32]  Magallón S, Sanderson MJ (2001) Absolute diversification rates in angiosperm clades. Evolution 55: 1762–1780.
[33]  Harmon LJ, Weir J, Brock C, Glor RE, Challenger W (2008) GEIGER: Investigating evolutionary radiations. Bioinformatics 24: 129–131.
[34]  Wiens JJ, Pyron RA, Moen DS (2011) Phylogenetic origins of local-scale diversity patterns and the causes of Amazonian megadiversity. Ecology Letters 14: 643–652.
[35]  Pybus OG, Harvey PH (2000) Testing macro-evolutionary models using incomplete molecular phylogenies. Proceedings of the Royal Society of London B 267: 2267–2271.
[36]  Rabosky DL (2006) Likelihood Methods for Detecting Temporal Shifts in Diversification Rates Evolution. 60: 1152–1164.
[37]  Nee S, Mooers AO, Harvey PH (1992) Tempo and mode of evolution revealed from molecular phylogenies. Proceedings of the National Academy of Sciences of the United States of America 89: 8322–8326.
[38]  Ackerly D (2009) Conservatism and diversification of plant functional traits: Evolutionary rates versus phylogenetic signal. Proceedings of the National Academy of Sciences of the United States of America 106: 19699–19706.
[39]  Pagel MD (1999) Inferring the historical patterns of biological evolution. Nature 401: 877–884.
[40]  Warren DL, Glor RE, Turelli M (2008) Environmental niche equivalency versus conservatism: Quantitative approaches to niche evolution. Evolution 62: 2868–2883.
[41]  Schoener TW (1968) Anolis lizards of Bimini: Resource partitioning in a complex fauna. Ecology 49: 704–726.
[42]  Broennimann O, Fitzpatrick MC, Pearman PB, Petitpierre B, Pellissier L, et al. (2012) Measuring ecological niche overlap from occurrence and spatial environmental data. Global Ecology and Biogeography 21: 481–497.
[43]  Revell LJ, Harmon LJ, Collar DC (2008) Phylogenetic signal, evolutionary process, and rate. Systematic Biology 57: 591–601.
[44]  Coetzee JA (1983) Intimations on the Tertiary vegetation of southern Africa. Bothalia 14: 345–354.
[45]  Jones CS, Pierce RA (1996) Diversity and evolution of seedling Bauplane in Pelargonium (Geraniaceae). Aliso 14: 281–295.
[46]  Jones CS, Martínez-Cabrera HI, Nicotra AB, Mocko K, Marais EM, et al. (2013) Phylogenetic infl uences on leaf trait integration in Pelargonium (Geraniaceae): Convergence, divergence, and historical adaptation to a rapidly changing climate. American Journal of Botany 100: 1306–1321.
[47]  Roncal J, Blach-Overgaard A, Borchsenius F, Balslev H, Svenning J (2011) A Dated Phylogeny Complements Macroecological Analysis to Explain the Diversity Patterns in Geonoma (Arecaceae). Biotropica 43: 324–334.
[48]  Ricklefs RE, Losos JB, Townsend TM (2007) Evolutionary diversification of clades of squamate reptiles. Journal of Evolutionary Biology 20: 1751–1762.
[49]  Walker TD, Valentine JW (1984) Equilibrium models of evolutionary species diversity and the number of empty niches. American Naturalist 124: 887–899.
[50]  Mayr E (1947) Ecological factors in speciation. Evolution 1: 263–288.
[51]  Slingsby JA, Verboom GA (2006) Phylogenetic relatedness limits co-occurrence at fine spatial scales: evidence from the schoenoid sedges (Cyperaceae: Schoeneae) of the Cape Floristic Region, South Africa. American Naturalist 168: 14–27.

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