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dc.contributor.authorTakayama, Koji
dc.contributor.authorCrawford, Daniel J.
dc.contributor.authorLópez-Sepúlveda, Patricio
dc.contributor.authorGreimler, Josef
dc.contributor.authorStuessy, Tod F.
dc.identifier.citationTakayama, K., Crawford, D. J., López-Sepúlveda, P., Greimler, J., & Stuessy, T. F. (2018). Factors driving adaptive radiation in plants of oceanic islands: a case study from the Juan Fernández Archipelago. Journal of plant research, 131(3), 469–485.
dc.descriptionThis work is licensed under a Creative Commons Attribution 4.0 International License.en_US
dc.description.abstractAdaptive radiation is a common evolutionary phenomenon in oceanic islands. From one successful immigrant population, dispersal into different island environments and directional selection can rapidly yield a series of morphologically distinct species, each adapted to its own particular environment. Not all island immigrants, however, follow this evolutionary pathway. Others successfully arrive and establish viable populations, but they remain in the same ecological zone and only slowly diverge over millions of years. This transformational speciation, or anagenesis, is also common in oceanic archipelagos. The critical question is why do some groups radiate adaptively and others not? The Juan Fernández Islands contain 105 endemic taxa of angiosperms, 49% of which have originated by adaptive radiation (cladogenesis) and 51% by anagenesis, hence providing an opportunity to examine characteristics of taxa that have undergone both types of speciation in the same general island environment. Life form, dispersal mode, and total number of species in progenitors (genera) of endemic angiosperms in the archipelago were investigated from literature sources and compared with modes of speciation (cladogenesis vs. anagenesis). It is suggested that immigrants tending to undergo adaptive radiation are herbaceous perennial herbs, with leaky self-incompatible breeding systems, good intra-island dispersal capabilities, and flexible structural and physiological systems. Perhaps more importantly, the progenitors of adaptively radiated groups in islands are those that have already been successful in adaptations to different environments in source areas, and which have also undergone eco-geographic speciation. Evolutionary success via adaptive radiation in oceanic islands, therefore, is less a novel feature of island lineages but rather a continuation of tendency for successful adaptive speciation in lineages of continental source regions.en_US
dc.description.sponsorshipAustrian Science Fund Grant number P21723-B16en_US
dc.description.sponsorshipNational Fund for Scientific and Technological Development Grant number 1160794en_US
dc.description.sponsorshipJapan Society for the Promotion of Science under Open Partnership Joint Projecten_US
dc.rightsCopyright © 2018, The Author(s)en_US
dc.subjectRobinson Crusoe Islandsen_US
dc.titleFactors driving adaptive radiation in plants of oceanic islands: A case study from the Juan Fernández Archipelagoen_US
kusw.kuauthorCrawford, Daniel J.
kusw.kudepartmentEcology and Evolutionary Biologyen_US
kusw.kudepartmentBiodiversity Instituteen_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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