Spatial genetic structure of Simarouba amara Aubl. (Simaroubaceae), a dioecious, animal-dispersed Neotropical tree, on Barro Colorado Island, Panama

Hardesty, Britta Denise; Dick, Christopher W.; Kremer, Antoine; Hubbell, Stephen P.; Bermingham, Eldredge

doi:10.1038/sj.hdy.6800714

Cited by 85 publications

(92 citation statements)

References 50 publications

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“…It is likely that the SGS observed in the youngest cohort arises from limited seed dispersal from mother trees and is subsequently reduced as natural selection and random mortality causes a gradual reduction in genetic structuration as the cohort matures. Similar findings were observed for the seedling cohort of Simarouba amara, an animal dispersed Neotropical tree species (Hardesty et al, 2005). However, the structuration we observed within the oldest cherry cohort in the managed population is contrary to the concept of demographic thinning reducing SGS.…”

Section: Discussionsupporting

confidence: 85%

Distribution and fine-scale spatial-genetic structure in British wild cherry (Prunus avium L.)

et al. 2007

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Insights into the within-population spatial-genetic structure (SGS) of forest tree species, where little is known regarding seed and pollen dispersal patterns, enhance understanding of their ecology and provide information of value in conservation and breeding. This study utilised 13 polymorphic simple sequence repeat loci to investigate the impact of asexual recruitment, management regime and tree size on the development of SGS in wild cherry (Prunus avium L). Only 246 genotypes were identified in the 551 trees sampled, reflecting significant levels of clonal reproduction in both managed and unmanaged populations. Naturally regenerated wild cherry was spatially aggregated under both management regimes. However, in the managed population, sexually derived trees accounted for a greater proportion of the smaller size classes, whereas vegetatively produced trees dominated the smaller size classes in the unmanaged population. High overall SGS values (Sp 0.030-Sp 0.045) were observed when considering only sexually derived genets and kinship coefficients were significant up to the 120 m distance class for both populations. The inclusion of clonal ramets in the analysis significantly increased the overall SGS (Sp 0.089-Sp 0.119) as well as kinship coefficients in the 40-80 m distance classes, illustrating the dramatic impact of vegetative propagation on SGS in this species. Increased spatial aggregation and regeneration appeared to be concomitant with increased SGS in the 40 m distance class in the unmanaged population. Neighbourhood size estimates were relatively small for both populations and kinship coefficients were found to decline with distance under both management regimes, suggesting that common mechanisms may restrict gene dispersal in wild cherry.

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Section: Discussionsupporting

confidence: 85%

Distribution and fine-scale spatial-genetic structure in British wild cherry (Prunus avium L.)

et al. 2007

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“…The rationale for including the embryo stage is obvious: their spatial distribution, created through seed dispersal, is the template on which all steps of the ''seed dispersal loop'' build upon. Starting with the seedling stage ignores this initial template and requires inference about the seed dispersal process and its influence on SGS (Choo et al 2012;Hardesty et al 2005). The fact that we could follow the seed dispersal vectors-the two tamarin species-at close range and collect their defecation with dispersed seeds allowed for the inclusion of the embryo stage.…”

Section: Discussionmentioning

confidence: 99%

Primate seed dispersal leaves spatial genetic imprint throughout subsequent life stages of the Neotropical tree Parkia panurensis

Bialozyt

Luettmann

Michalczyk

et al. 2014

Trees

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Key messageThe Neotropical tree Parkia panurensis shows a spatial genetic structure from the seed to the adult stage that is most likely the outcome of the seed dispersal provided by primates. Abstract Seed dispersal and pollination determine the gene flow within plant populations. In addition, seed dispersal creates the template for subsequent stages of plant recruitment. Therefore, the question arises whether and how seed dispersal affects the spatial genetic structure (SGS) of plant populations. In this study, we used microsatellites to analyse the SGS of the Neotropical tree Parkia panurensis (Fabaceae). This plant species is a major food resource for primates and its seeds are mainly dispersed by primates. Seeds were collected during behavioural observations of a tamarin mixed-species troop in northeastern Peru. Additionally, leaf samples of juveniles and of adults trees of this species were collected throughout the home range of the tamarin troop. A significant SGS for embryos (located within the dispersed seeds) and for nonreproductive plants are found up to a distance of 300 m. This matches the distance within which most seeds are dispersed. In the adult stage, the scale of a significant SGS is reduced to 100 m. While we cannot explain this scale reduction, our study provides the first evidence that primate seed dispersal does influence the SGS of a tropical tree species.

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“…Most tropical forest canopy trees occur at low density in old growth forest and so long distance seed and/or pollen dispersal are expected Ward et al, 2005;Hardesty et al 2005). As a result, they often show little population genetic structure (Dutech et al, 2002;Latouche-Hallé et al, 2003;Lowe et al, 2003;Ward et al, 2005;Hardesty et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Genetic Consequences of Multigenerational and Landscape Colonisation Bottlenecks for a Neotropical Forest Pioneer Tree, Vochysia ferruginea

Davies

Cavers

Finegan

et al. 2010

Tropical Plant Biol.

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The NERC and CEH trade marks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. the genetic make up of recolonised populations. One main concern from these results is that if secondary forest blocks harbour reduced genetic diversity and persist in the landscape, then species like V. ferruginea may be forced into a downward spiral of diversity loss if old growth remnants, which harbour higher diversity, are cleared and secondary blocks are used as reforestation sources. Running head: colonisation bottlenecks in a neotropical pioneer tree

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Spatial genetic structure of Simarouba amara Aubl. (Simaroubaceae), a dioecious, animal-dispersed Neotropical tree, on Barro Colorado Island, Panama

Cited by 85 publications

References 50 publications

Distribution and fine-scale spatial-genetic structure in British wild cherry (Prunus avium L.)

Distribution and fine-scale spatial-genetic structure in British wild cherry (Prunus avium L.)

Primate seed dispersal leaves spatial genetic imprint throughout subsequent life stages of the Neotropical tree Parkia panurensis

Genetic Consequences of Multigenerational and Landscape Colonisation Bottlenecks for a Neotropical Forest Pioneer Tree, Vochysia ferruginea

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