Speciation and Biogeography of &lt;I&gt;Erigeron&lt;/I&gt; (Asteraceae) in the Juan Fernández Archipelago, Chile, based on AFLPs and SSRs

López-Sepúlveda, Patricio; Takayama, Kōji; Greimler, Josef; Crawford, Daniel J.; Peñailillo, Patricio; Baeza, Marcelo; Ruíz, Eduardo; Köhl, Gudrun; Tremetsberger, Karin; Gatica, Alejandro; Letelier, Luis; Novoa, Patricio; Novak, Johannes; Stuessy, Tod F.

doi:10.1600/036364415x689311

Cited by 9 publications

(22 citation statements)

References 66 publications

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“…* Erigeron fernandezia also occurs on Robinson Crusoe Island, perhaps an historical introduction (López-Sepúlveda et al 2015 )…”

Section: Endemic Angiosperms In the Juan Fernández Islandsmentioning

confidence: 99%

“…Erigeron has radiated on Alejandro Selkirk Island, which strongly suggests that it arrived there directly, rather than first immigrating to the older island and then traveling further westward to the younger island. Population genetic studies (López-Sepúlveda et al 2015 ) revealed that molecular divergence among some of these species is not great, especially among those of the E. ingae complex (involving E. ingae, E. turricola , and E. luteoviridis ), which is less than seen between island congeners in other genera. This is the only example of cladogenesis and adaptive radiation occurring on the younger island.…”

Section: Endemic Angiosperms In the Juan Fernández Islandsmentioning

confidence: 99%

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Factors driving adaptive radiation in plants of oceanic islands: a case study from the Juan Fernández Archipelago

et al. 2018

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Adaptive 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.

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“…* Erigeron fernandezia also occurs on Robinson Crusoe Island, perhaps an historical introduction (López-Sepúlveda et al 2015 )…”

Section: Endemic Angiosperms In the Juan Fernández Islandsmentioning

confidence: 99%

Section: Endemic Angiosperms In the Juan Fernández Islandsmentioning

confidence: 99%

Factors driving adaptive radiation in plants of oceanic islands: a case study from the Juan Fernández Archipelago

et al. 2018

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“…However, pairwise F ST between the Volcano and Bonin Islands in EST‐SSR analysis was high, ranging from 0.20 to 0.22 (Figure ). In the genus Erigeron in the Juan Fernandez archipelago, pairwise F ST calculated using SSRs ranged from 0.23 to 0.55 between different species on the same island, but F ST was 0.093 in the same species on islands 181 km apart (López‐Sepúlveda et al, 2015b). This large divergence in EST‐SSRs, which have a higher mutation rate than other nuclear DNA regions (Zhang & Hewitt, 2003), might mean that P. boninensis in the Volcano Islands is on the way to speciation.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity, structure, and demography of Pandanus boninensis (Pandanaceae) with sea drifted seeds, endemic to the Ogasawara Islands of Japan: Comparison between young and old islands

et al. 2020

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Pandanus boninensis, endemic to the Ogasawara Islands, Japan, is distributed on both the older Bonin and younger Volcano Islands. In this study, we conducted population genetic analyses of P. boninensis on these islands to examine the population diversity and structure across old and young islands, to assess potential differences in population demography with island age, and to collect any evidence of migration between old and young islands. We found that the genetic diversity of expressed sequence tag (EST)–based microsatellite (SSR) markers, the nucleotide diversity of nuclear DNA sequences, and the haplotype diversity of chloroplast DNA on young islands were lower than those on old islands. Clustering analyses of EST‐SSR indicated that populations on old islands were strongly diverged from those on young islands. Approximate Bayesian computation analysis of EST‐SSR suggested that population expansion occurred on old islands while population reduction occurred on young islands. We also found evidence of migration among old islands (mostly from south to north), while it appears that there have been very few migration events between old and young islands. These differences could be due to the fact that young islands tend to be geographically isolated and support smaller populations that began a shorter time ago from limited founders. The P. boninensis populations on the Volcano Islands are interesting from an evolutionary perspective as they constitute a classic example of the early stages of progressive colonization on oceanic islands with small effective population sizes and low genetic diversity.

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“…It appears, therefore, to be an example of back migration from the younger to the older island ( Valdebenito et al . 1992 ; López-Sepúlveda et al 2015 ).…”

Section: Resultsmentioning

confidence: 99%

“…2015 ), which has seven species on Robinson Crusoe Island that have originated cladogenetically and one on Alejandro Selkirk Island that has evolved anagenetically. The genus Erigeron (Asteraceae; López-Sepúlveda et al . 2015) has six species that evolved cladogenetically on the younger island, Alejandro Selkirk.…”

Section: Introductionmentioning

confidence: 99%

Genetic consequences of cladogenetic vs. anagenetic speciation in endemic plants of oceanic islands

et al. 2015

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This paper presents for the first time a comparison of the genetic consequences of two different types of speciation in plants of an oceanic island. Genetic data, using two different DNA methods, were obtained from more than 4,000 plants from the two major islands of the Juan Fernández Archipelago (Chile). Results show that some immigrant populations undergo major splitting events and harbor limited genetic diversity within each evolving line. In contrast, other immigrant populations establish and enlarge, but they never split, hence accumulating higher levels of genetic diversity.

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Speciation and Biogeography of <I>Erigeron</I> (Asteraceae) in the Juan Fernández Archipelago, Chile, based on AFLPs and SSRs

Cited by 9 publications

References 66 publications

Factors driving adaptive radiation in plants of oceanic islands: a case study from the Juan Fernández Archipelago

Factors driving adaptive radiation in plants of oceanic islands: a case study from the Juan Fernández Archipelago

Genetic diversity, structure, and demography of Pandanus boninensis (Pandanaceae) with sea drifted seeds, endemic to the Ogasawara Islands of Japan: Comparison between young and old islands

Genetic consequences of cladogenetic vs. anagenetic speciation in endemic plants of oceanic islands

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