Conservation and genetics of two Critically Endangered Hispaniolan palms: genetic erosion of Pseudophoenix lediniana in contrast to P. ekmanii

Rodríguez-Peña, Rosa A.; Jestrow, Brett; Veloz, Alberto; Jiménez-Rodríguez, Francisco; García, Ricardo Marcel Landinez; Meerow, Alan W.; Griffith, M. Patrick; Maunder, Michael; Francisco‐Ortega, Javier

doi:10.1007/s00606-014-1028-6

Cited by 9 publications

(4 citation statements)

References 51 publications

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“…A similar pattern of inbred, moderately genetically diverse island populations was found for P. galapageium (Urquia et al, 2020) and Pseudophoenix (Rodríguez-Peña et al, 2014). For the Persea boninensis, a similar H E was reported, yet with no signs of inbreeding (Tsuneki et al, 2014).…”

Section: Inbred and Moderately Genetically Diverse Present-day Popula...supporting

confidence: 75%

Genetic patterns of Magnolia in the Lesser Antilles: Stepwise colonisation leading to highly inbred island ‘populations’

Veltjen

Tamaki

Asselman

et al. 2022

Journal of Biogeography

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Aim Islands are ‘nature's laboratories of evolution’. Most island biogeographical studies have focussed on remote volcanic island chains. Here, we challenge island biogeographical patterns using a slowly evolving recent colonist present on five islands in a nonlinear chronosequence island chain. Location The Lesser Antilles (Caribbean). Taxon Magnolia dodecapetala (Magnoliaceae). Methods Genetic diversity was characterised using Sanger sequencing of 21 individuals amplified for 11 DNA markers, plus microsatellite data of 195 individuals genotyped with 19 simple sequence repeat (SSR) markers. Sanger sequencing data were used to construct a Bayesian phylogenetic hypothesis, while SSR markers were used to run approximate Bayesian computation (ABC) demographic analyses and calculate population statistics. Results Both types of molecular data support stepwise colonisation, decoupled from known island ages. The ABC analyses support a north to south migration while the Sanger sequencing data indicate a mixture of island progression rule and stepping stone dispersal. The SSR data show strong genetic structuring per island and significant inbreeding in all populations except in Saint Lucia. The lowest genetic diversity is found in the population from Saint Vincent. A high amount of genetic linkage occurs in a subpopulation from Dominica. Main Conclusions Biogeographical patterns in the complex geological setting of the Lesser Antilles are uncovered using a slowly evolving study species. All genetic data support treating each island as distinct Management Units for conservation and call for a re‐evaluation of the species limits. Inbreeding threatens the survival of island populations and the populations of Saint Vincent and Dominica represent conservation priorities.

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Section: Inbred and Moderately Genetically Diverse Present-day Popula...supporting

confidence: 75%

Genetic patterns of Magnolia in the Lesser Antilles: Stepwise colonisation leading to highly inbred island ‘populations’

Veltjen

Tamaki

Asselman

et al. 2022

Journal of Biogeography

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“…A species becomes a rare species due to human disturbances (new rare species) or by being associated with specific habitats and particular geographical locations (naturally rare species or old rare species). The latter show a naturally fragmented distribution and geographically isolated populations which lead to a decrease of gene flow and genetic diversity and increase genetic drift and genetic differentiation among populations (Cole 2003;Frankham et al 2010;Rodríguez-Peña et al 2014). However, in some cases, this rule of thumb does not apply; thus other rare species show high genetic diversity and low differentiation among populations (e.g.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and structure of the narrow endemic species Crepis granatensis: implications for conservation

Jiménez

Ramírez-Rodríguez

Melendo-Luque

et al. 2021

Plant Biosystems - An International Journal Dealing with all As

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“…Population genetic studies can provide an important perspective for conservation. According to several authors, many threatened species have low genetic diversity and high inbreeding coefficients (Saccheri et al 1998;Spielman et al 2004;Frankham et al 2010;Rodríguez-Peña et al 2014a). These consequences are more acute in small populations found in fragmented habitats.…”

Section: Introductionmentioning

confidence: 99%

“…Microsatellites, or simple sequence repeats (SSRs), are thought to be neutral and highly variable molecular markers (Ellegren 2004) widely used to assess population genetic structure and diversity (Sunnucks 2000;Jarne and Lagoda 1996;Allendorf et al 2010;Rodríguez-Peña et al 2014a). They are also widely used to investigate demographic history (Pritchard et al 1999;Castellanos-Morales et al 2016) and delimit species boundaries (Caddah et al 2013;Rodríguez-Peña et al 2014b).…”

Section: Introductionmentioning

confidence: 99%

Investigating the genetic diversity and differentiation patterns in the Penstemon scariosus species complex under different sample sizes using AFLPs and SSRs

Rodríguez-Peña

Johnson

et al. 2018

Conserv Genet

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Habitat fragmentation due to anthropogenic activities is the major cause of biodiversity loss. Endemic and narrowly distributed species are the most susceptible to habitat degradation. Penstemon scariosus is one of many species whose natural habitat is vulnerable to industrialization. All varieties of P. scariosus (P. scariosus var. albifluvis, P. scariosus var. cyanomontanus, P. scariosus var. garrettii, P. scariosus var. scariosus) have small distribution ranges, but only P. scariosus var. albifluvis is being considered for listing under the Endangered Species Act. We used eight microsatellites or simple sequence repeats (SSRs) loci and two amplified fragment length polymorphism (AFLP) primer combinations to investigate the population genetic structure and diversity of P. scariosus varieties. Moreover, we compared the utility of the two marker systems in conservation genetics and estimated an appropriate sample size in population genetic studies. Genetic differentiation among populations based on F st ranged from low to moderate (F st = 0.056-0.157) and from moderate to high when estimated with D es (D es = 0.15-0.32). Also, AMOVA analysis shows that most of the genetic variation is within populations. Inbreeding coefficients (F is) were high in all varieties (0.20-0.56). The Bayesian analysis, STRU CTU RE, identified three clusters from SSR data and four clusters from AFLPs. Clusters were not consistent between marker systems and did not represent the current taxonomy. MEMGENE revealed that a high proportion of the genetic variation is due to geographic distance (R 2 = 0.38, P = 0.001). Comparing the genetic measurements from AFLPs and SSRs, we found that AFLP results were more accurate than SSR results across sample size when populations were larger than 25 individuals. As sample size decreases, the estimates become less stable in both AFLP and SSR datasets. Finally, this study provides insight into the population genetic structure of these varieties, which could be used in conservation efforts.

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Conservation and genetics of two Critically Endangered Hispaniolan palms: genetic erosion of Pseudophoenix lediniana in contrast to P. ekmanii

Cited by 9 publications

References 51 publications

Genetic patterns of Magnolia in the Lesser Antilles: Stepwise colonisation leading to highly inbred island ‘populations’

Genetic patterns of Magnolia in the Lesser Antilles: Stepwise colonisation leading to highly inbred island ‘populations’

Genetic diversity and structure of the narrow endemic species Crepis granatensis: implications for conservation

Investigating the genetic diversity and differentiation patterns in the Penstemon scariosus species complex under different sample sizes using AFLPs and SSRs

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