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- W2000584407 abstract "The pollinator-driven ecological speciation model has frequently been invoked to explain plant richness in biodiversity hotspots. Here, by focusing on Gladiolus (260 species), a flagship example of a clade with diverse pollination biology, we test the hypothesis that high species diversity in southern Africa, one of the world’s most floristically rich regions, has primarily been driven by ecological shifts in pollination systems. We use phylogenetic methods to estimate rates of transition between the seven highly specialized pollination strategies in Gladiolus. We find that pollination systems have evolved multiple times and that some pollination strategies arose by a variety of evolutionary pathways. Pollination shifts account for up to one-third of all lineage splitting events in the genus, providing partial support for the pollinator-driven speciation model. Transitions from the ancestral pollination mode to derived systems have also resulted in increased rates of diversification, suggesting that certain pollination systems may speed up speciation processes, independently of pollination shifts per se. This study suggests that frequent pollination shifts have played a role in driving high phenotypic and species diversity but indicates that additional factors need to be invoked to account for the spectacular diversification in southern African Gladiolus." @default.
- W2000584407 created "2016-06-24" @default.
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- W2000584407 date "2012-07-01" @default.
- W2000584407 modified "2023-10-18" @default.
- W2000584407 title "Did Pollination Shifts Drive Diversification in Southern African <i>Gladiolus</i>? Evaluating the Model of Pollinator-Driven Speciation" @default.
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- W2000584407 doi "https://doi.org/10.1086/666003" @default.
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