Molecular Phylogenetic Studies of Caribbean Palms (Arecaceae) and Their Relationships to Biogeography and Conservation

Roncal, Julissa; Zona, Scott; Lewis, Carl E.

doi:10.1007/s12229-008-9005-9

Cited by 38 publications

(24 citation statements)

References 60 publications

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“…Therefore, we selected four characters: the number of wide metaxylem elements, the phytoliths, the centrifugal differentiation of the fibrous part, and the parenchyma sustained growth. To infer the evolutionary history of these characters, we used the family topology of the most congruent palm supertree (Baker et al, 2009), and within Coryphoideae we grafted the topology of Cryosophileae of Roncal et al (2008) and the topology of Trachycarpeae of Bacon et al (2012). The data matrix comes from Table 2.…”

Section: Methodsmentioning

confidence: 99%

Palm stem anatomy and computer‐aided identification: The Coryphoideae (Arecaceae)

Thomas¹,

Franceschi²

2013

American J of Botany

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Section: Methodsmentioning

confidence: 99%

Palm stem anatomy and computer‐aided identification: The Coryphoideae (Arecaceae)

Thomas¹,

Franceschi²

2013

American J of Botany

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“…RPB2 encodes RNA polymerase II subunit B and is single copy in diploid monocots (e.g. Specht 2006;Roncal et al 2008). The region corresponding to flavanone 3-hydroxylase gene (F3H) intron II in the orchid Bromheadia finlaysoniana was amplified with primers Flav-F2 and Flav-R (Taylor et al 2004).…”

Section: Methodsmentioning

confidence: 99%

An integrative approach to delimiting species in a rare but widespread mycoheterotrophic orchid

Barrett

Freudenstein

2011

Molecular Ecology

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In the spirit of recent calls for species delimitation studies to become more pluralistic, incorporating multiple sources of evidence, we adopted an integrative, phylogeographic approach to delimiting species and evolutionarily significant units (ESUs) in the Corallorhiza striata species complex. This rare, North American, mycoheterotrophic orchid has been a taxonomic challenge regarding species boundaries, displaying complex patterns of variation and reduced vegetative morphology. We employed plastid DNA, nuclear DNA and morphometrics, treating the C. striata complex as a case study for integrative species delimitation. We found evidence for the differentiation of the endangered C. bentleyi (eastern USA) + C. striata var. involuta (Mexico) from the remaining C. striata (= C. striata s.s.; USA, Canada, Mexico). Corallorhiza striata involuta and C. bentleyi, disjunct by thousands of kilometres (Mexico-Appalachia), were genetically identical but morphologically distinct. Evidence suggests the C. striata complex represents three species: C. bentleyi, C. involuta and a widespread C. striata s.s under operational criteria of diagnosability and common allele pools. In contrast, Bayesian coalescent estimation delimited four species, but more informative loci and a resultant species tree will be needed to place higher confidence in future analyses. Three distinct groupings were identified within C. striata s.s., corresponding to C. striata striata, C. striata vreelandii, and Californian accessions, but these were not delimited as species because of occupying a common allele pool. Each comprises an ESU, warranting conservation considerations. This study represents perhaps the most geographically comprehensive example of integrative species delimitation for any orchid and any mycoheterotroph.

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“…For example, the Caribbean Acalyphoideae (Euphorbiaceae) are estimated to have repeatedly colonized the Caribbean islands during the Miocene mainly from Central America (Cervantes et al., ), whereas Brunfelsia (Solanaceae) probably entered the Antilles 8–6 Ma from South America (Filipowicz & Renner, ). Phylogenetic studies in different palm lineages also indicate independent colonizations of the Caribbean islands from the mainland and multiple migrations between North and South America (Bacon, Baker, & Simmons, ; Bacon, Mora, Wagner, & Jaramillo, ; Cuenca, Asmussen‐Lange, & Borchsenius, ; Roncal, Zona, & Lewis, ). For the NWTP, previous phylogenetic hypotheses have suggested an origin of the Caribbean taxa from a mainland ancestor (Roncal et al., ).…”

Section: Introductionmentioning

confidence: 99%

The roles of dispersal and mass extinction in shaping palm diversity across the Caribbean

Cano

Bacon

Stauffer

et al. 2018

Journal of Biogeography

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Aim: The rich flora of the Caribbean islands and surrounding mainland evolved in a context of isolation alternated with phases of terrestrial connectivity between landmasses, climatic fluctuations and episodes of mass extinctions during the Cenozoic.We explored how these events affected the evolution of the sister palm tribes Cryosophileae and Sabaleae, and how continent-island exchanges, endemic radiations and mass extinction shaped their extant diversity.Location: The American continent including the Caribbean region. Methods:We reconstructed a time-calibrated phylogeny of the palm tribes Cryosophileae and Sabaleae using 84% of the known species. We inferred ancestral distribution and tested the effect of island colonization and mass extinction on extant diversity. Results: Our results indicate that Cryosophileae and Sabaleae originated c. 77 Ma most probably in Laurasia, and their extant species started to diversify between 56-35 Ma and 19-10 Ma respectively. Biogeographical state reconstruction estimated that Cryosophileae dispersed to South America between 56-35 Ma, then dispersed to North-Central America between 39-25 Ma and the Caribbean islands between 34-21 Ma. We detected a possible signature of a mass extinction event at the end of the Eocene, affecting the diversification of Cryosophileae and Sabaleae and we did not detect a diversification rate shift related to the colonization of the Caribbean islands. Main conclusions: Species of Cryosophileae in the Caribbean islands are probably derived from a single Oligocene dispersal event that likely occurred overwater from North-Central America rather than through the hypothesized GAARlandia land bridge. Contrastingly, three independent Miocene dispersal events from North-Central America explain the occurrence of Sabaleae in the Caribbean islands. Contrary to our expectations, island colonization did not trigger increased diversification.Instead, we find that diversification patterns in this clade, and its disappearance from northernmost latitudes, could be the signature of a mass extinction triggered by the global temperature decline at the end of the Eocene.

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Molecular Phylogenetic Studies of Caribbean Palms (Arecaceae) and Their Relationships to Biogeography and Conservation

Cited by 38 publications

References 60 publications

Palm stem anatomy and computer‐aided identification: The Coryphoideae (Arecaceae)

Palm stem anatomy and computer‐aided identification: The Coryphoideae (Arecaceae)

An integrative approach to delimiting species in a rare but widespread mycoheterotrophic orchid

The roles of dispersal and mass extinction in shaping palm diversity across the Caribbean

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