Comparison of the population genetics and densities of five <i>Pinanga</i> palm species at Kuala Belalong, Brunei

Shapcott, Alison

doi:10.1046/j.1365-294x.1999.00749.x

Cited by 18 publications

(15 citation statements)

References 88 publications

(129 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within populations, adult Lodoicea on Curieuse have significantly lower Nei's genetic diversity (0.263; P < 0.01) and substantially fewer polymorphic loci (56%) than the populations sampled from Praslin. These levels of diversity are comparable to those reported for the Madagascan endemic palm Beccariophoenix madagascariensis (Shapcott et al, 2007), but substantially greater than for other endemic palms with similarly narrow ranges, albeit with smaller (Dowe et al, 1997;Shapcott, 1999;Shapcott et al, 2009). The low differentiation between juvenile cohorts in Lodoicea suggests that contemporary gene flow is sufficient to prevent erosion of genetic diversity within populations by random genetic drift or inbreeding, processes known to threaten the conservation status of plant species surviving in small fragmented populations (Ouborg et al, 2006).…”

Section: Genetic Diversity In Lodoiceasupporting

confidence: 70%

See 1 more Smart Citation

Morphological and genetic differentiation in populations of the dispersal‐limited coco de mer (Lodoicea maldivica): implications for management and conservation

Fleischer‐Dogley

Kettle

Edwards

et al. 2010

Diversity and Distributions

View full text Add to dashboard Cite

Aims Developing plant conservation strategies requires knowledge of ecological and genetic processes underlying population dynamics. We aimed to quantify morphological and genetic differentiation among remnant populations of the iconic coco‐de‐mer palm Lodoicea maldivica. We hypothesized that limited gene flow among widely spaced populations would result in high genetic variation and large phenotypic differences among populations. Location Islands of Praslin and Curieuse (CU), Seychelles, Indian Ocean. Methods We conducted an extensive population survey and recorded morphological parameters for 447 Lodoicea in the main populations at Vallée de Mai (VM) and Fond Ferdinand (FF) on Praslin, and on CU. We collected leaf material from 180 trees in these populations for DNA genotyping using amplified fragment length polymorphisms. Results A total of 16,766 Lodoicea trees were recorded in the three populations (72.6% of Lodoicea on both islands). Lodoicea trees at VM and FF showed similar morphology, but differed in most parameters from those at CU, which were shorter, grew more slowly and produced fewer seeds. Mean overall genetic diversity was 0.337, and percentage of polymorphic loci was 91.1. Genetic diversity of the CU population was lower than that at VM and FF. There was weak genetic differentiation between CU and Praslin populations, but 99% of all genetic diversity was within populations. Main conclusions Trees on CU differed in growth and morphology from those of the two Praslin populations. These phenotypic differences, however, were not mirrored in the genetic structure of the populations. All populations were relatively genetically diverse with remarkably little differentiation among populations. This suggests that the capacity of Lodoicea to dominate across a range of habitats may be because of high phenotypic plasticity. High genetic connectivity may be maintained through long‐distance wind pollination. Given the uncertainty about the extent of underlying adaptive variation, we recommend that restoration projects avoid transferring seeds between island populations.

show abstract

Section: Genetic Diversity In Lodoiceasupporting

confidence: 70%

“…, 2007), but substantially greater than for other endemic palms with similarly narrow ranges, albeit with smaller populations (Dowe et al. , 1997; Shapcott, 1999; Shapcott et al. , 2009).…”

Section: Discussionmentioning

confidence: 83%

Morphological and genetic differentiation in populations of the dispersal‐limited coco de mer (Lodoicea maldivica): implications for management and conservation

Fleischer‐Dogley

Kettle

Edwards

et al. 2010

Diversity and Distributions

View full text Add to dashboard Cite

show abstract

“…Low genetic differentiation reported here is similar to palms sampled across small spatial distances in Mexico and Brunei [76,78]. The other LHI palms have similarly low levels of genetic differentiation [6,72].…”

Section: Resultssupporting

confidence: 71%

Will Climate Change, Genetic and Demographic Variation or Rat Predation Pose the Greatest Risk for Persistence of an Altitudinally Distributed Island Endemic?

Simmons

Auld

Hutton³

et al. 2012

Biology

View full text Add to dashboard Cite

Species endemic to mountains on oceanic islands are subject to a number of existing threats (in particular, invasive species) along with the impacts of a rapidly changing climate. The Lord Howe Island endemic palm Hedyscepe canterburyana is restricted to two mountains above 300 m altitude. Predation by the introduced Black Rat (Rattus rattus) is known to significantly reduce seedling recruitment. We examined the variation in Hedyscepe in terms of genetic variation, morphology, reproductive output and demographic structure, across an altitudinal gradient. We used demographic data to model population persistence under climate change predictions of upward range contraction incorporating long-term climatic records for Lord Howe Island. We also accounted for alternative levels of rat predation into the model to reflect management options for control. We found that Lord Howe Island is getting warmer and drier and quantified the degree of temperature change with altitude (0.9 °C per 100 m). For H. canterburyana, differences in development rates, population structure, reproductive output and population growth rate were identified between altitudes. In contrast, genetic variation was high and did not vary with altitude. There is no evidence of an upward range contraction as was predicted and recruitment was greatest at lower altitudes. Our models predicted slow population decline in the species and that the highest altitude populations are under greatest threat of extinction. Removal of rat predation would significantly enhance future persistence of this species.

show abstract

“…Low genetic diversity has also been reported in several threatened palms elsewhere in the world (Dowe, Benzie & Ballment, 1997; Shapcott, 1998; González-Pérez, Caujape-Castells & Sosa, 2004), but in other studies substantially higher genetic diversity has been revealed (Shapcott, 1999; Henderson, Billotte & Pintaud, 2006; Shapcott et al, 2007). …”

Section: Discussionmentioning

confidence: 79%

Population genetics data help to guide the conservation of palm species with small population sizes and fragmented habitats in Madagascar

Gardiner

Rakotoarinivo

Rajaovelona

et al. 2017

PeerJ

View full text Add to dashboard Cite

BackgroundThe need to incorporate genetic data into conservation management decisions is increasingly recognised. However, many published studies represent a ‘gold standard’ of sampling, techniques, and analyses. Such rigour is often not possible with limited funding and resourcing available for developing plans for the increasing number of threatened species requiring conservation management. Two endemic palm species of the Itremo Massif in central Madagascar, Dypsis ambositrae and D. decipiens, are known to be threatened with extinction and conservation management for these species is a priority for the newly created protected area in the region.MethodsThe genetic diversity of these two species was studied using the relatively low-cost and rapid AFLP technique. DNA fragments generated using three primer combinations were analysed for 20 and 50 individuals of the two species, respectively, from across their ranges.ResultsGenetic diversity was relatively low for both species. The two sites where the highly restricted D. ambositrae grows were found to be genetically distinct (although overall heterozygosity was low). Despite having a much wider distribution and relatively large population, D. decipiens did not show clear geographical nor genetic groupings and had similarly low genetic heterozygosity to D. ambositrae.Discussion and RecommendationsWith so few individuals remaining in the wild and two genetically distinct subpopulations, it is recommended that both sites of D. ambositrae are conserved and that seed are collected from both for ex situ conservation and potential future reintroduction. It may be less important to focus resources on conserving or collecting ex situ material from all sites where D. decipiens is found, as the genetic diversity represented by each subpopulation is limited and increasing sampling may not protect significantly higher levels of genetic diversity. This study provides data that inform and support conservation decisions taken for both species within this region, and in the management of the newly designated Itremo Massif Protected Area, which covers most of the sites where these two species remain in the wild.

show abstract

Comparison of the population genetics and densities of five Pinanga palm species at Kuala Belalong, Brunei

Cited by 18 publications

References 88 publications

Morphological and genetic differentiation in populations of the dispersal‐limited coco de mer (Lodoicea maldivica): implications for management and conservation

Morphological and genetic differentiation in populations of the dispersal‐limited coco de mer (Lodoicea maldivica): implications for management and conservation

Will Climate Change, Genetic and Demographic Variation or Rat Predation Pose the Greatest Risk for Persistence of an Altitudinally Distributed Island Endemic?

Population genetics data help to guide the conservation of palm species with small population sizes and fragmented habitats in Madagascar

Contact Info

Product

Resources

About