Determinants of fine-scale spatial genetic structure in three co-occurring rain forest canopy trees in Borneo

Kettle, Chris J.; Hollingsworth, Peter; Burslem, David F. R. P.; Maycock, Colin R.; Khoo, Eyen; Ghazoul, Jaboury

doi:10.1016/j.ppees.2010.11.002

Cited by 34 publications

(69 citation statements)

References 52 publications

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“…SGS within plant populations has been investigated at both fine (FRELICH et al, 2003;TROUPIN et al, 2006;VAL-BUENA-CARABAÑA et al, 2007;KETTLE et al, 2011) and large scales (FRECKLETON and WATKINSON, 2002) often using spatial autocorrelation methods. In the tree populations under study here, most of the times we observed a non-significant autocorrelation for fine-scale SGS (Tables 3,4 and 5), suggesting that the genetic variants of P. chihuahuana, P. strobiformis, P. menziesii, and P. tremuloides are randomly distributed in space within each sampled plot.…”

Section: Discussionmentioning

confidence: 99%

Spatial genetic structure in the very rare and species-rich Picea chihuahuana tree community (Mexico)

et al. 2014

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In natural plant populations, the spatial genetic structure (SGS) is occasionally associated with evolutionary and ecological features such as the mating system, individual fitness, inbreeding depression and natural selection of the species of interest. The very rare Mexican P. chihuahuana tree community covers an area no more than 300 ha and has been the subject of several studies concerning its ecology and population genetics. The overall aim of most of these studies has been to obtain data to help design preservation and conservation strategies. However, analysis of the fine-scale SGS in this special forest tree community has not yet been conducted, which might help enrich the above mentioned conservation programs. In this study, we examined the SGS of this community, mostly formed by P. chihuahuana Martínez, Pinus strobiformis Ehrenberg ex Schlechtendah, Pseudotsuga menziesii (Mirb.) Franco, and Populus tremuloides Michx, in 14 localities at both the fine and large scales, with the aim of obtaining a better understanding of evolutionary processes. We observed a non-significant autocorrelation in fine-scale SGS, suggesting that the genetic variants of all four tree species are randomly distributed in space within each sampled plot of 50 x 50 m. At the larger scale, the autocorrelation was highly significant for P. chihuahuana and P. menziesii, probably as a result of insufficient gene flow due to the extreme population isolation and small sizes. For these two species our results provided strong support for the theory of isolation by distance.

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Section: Discussionmentioning

confidence: 99%

Spatial genetic structure in the very rare and species-rich Picea chihuahuana tree community (Mexico)

et al. 2014

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“…Seed dispersal distance and FSGS intensity are negatively correlated for some tropical trees. On the other hand, a limited number of studies have shown a significant relationship between pollen dispersal distance and FSGS (Dick et al 2008, Kettle et al 2011a, although a negative correlation is also expected theoretically. On the other hand, a limited number of studies have shown a significant relationship between pollen dispersal distance and FSGS (Dick et al 2008, Kettle et al 2011a, although a negative correlation is also expected theoretically.…”

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confidence: 89%

Fine‐scale Spatial Genetic Structure of Ten Dipterocarp Tree Species in a Bornean Rain Forest

et al. 2011

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Fine-scale spatial genetic structure is increasingly recognized as an important factor in the studies of tropical forest trees as it influences genetic diversity of local populations. The biologic mechanisms that generate fine-scale spatial genetic structure are not fully understood. We studied fine-scale spatial genetic structure in ten coexisting dipterocarp tree species in a Bornean rain forest using microsatellite markers. Six of the ten species showed statistically significant fine-scale spatial genetic structure. Fine-scale spatial genetic structure was stronger at smaller spatial scales ( 100 m) than at larger spatial scales (> 100 m) for each species. Multiple regression analysis suggested that seed dispersal distance was important at the smaller spatial scale. At the larger scale (> 100 m) and over the entire sample range (0-1000 m), pollinators and spatial distribution of adult trees were more important determinants of fine-scale spatial genetic structure. Fine-scale spatial genetic structure was stronger in species pollinated by less mobile small beetles than in species pollinated by the more mobile giant honeybee (Apis dorsata). It was also stronger in species where adult tree distributions were more clumped. The hypothesized mechanisms underlying the negative correlation between clump size and fine-scale spatial genetic structure were a large overlap among seed shadows and genetic drift within clumped species.

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“…Results of genetic investigations conducted in the population of P. alba showed over-domination of clonal reproduction, which resulted in very low clonal diversity (R = 0.12). Significant SGS was found at density, disturbances or behavior of the seed dispersers are important for SGS as well because each of these factors may affect directions and rates of population processes responsible for SGS (Vekemans and Hardy 2004;Hardy et al 2006;Jones et al 2006;Kettle et al 2011;Scofield et al 2010;Mandák et al 2013;Meeus et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Clonality as a driver of spatial genetic structure in populations of clonal tree species

Dering

Chybicki

Rączka³

2015

J Plant Res

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Random genetic drift, natural selection and restricted gene dispersal are basic factors of the spatial genetic structure (SGS) in plant populations. Clonal reproduction has a profound effect on population dynamics and genetic structure and thus emerges as a potential factor in contributing to and modelling SGS. In order to assess the impact of clonality on SGS we studied clonal structure and SGS in the population of Populus alba. Six hundred and seventy-two individuals were mapped and genotyped with 16 nuclear microsatellite markers. To answer the more general question regarding the relationship between SGS and clonality we used Sp statistics, which allows for comparisons of the extent of SGS among different studies, and the comparison of published data on SGS in clonal and non-clonal tree species. Sp statistic was extracted for 14 clonal and 27 non-clonal species belonging to 7 and 18 botanical families, respectively. Results of genetic investigations conducted in the population of P. alba showed over-domination of clonal reproduction, which resulted in very low clonal diversity (R = 0.12). Significant SGS was found at both ramet (Sp = 0.095) and genet level (Sp = 0.05) and clonal reproduction was indicated as an important but not sole driving factor of SGS. Within-population structure, probably due to family structure also contributed to high SGS. High mean dominance index (D = 0.82) indicated low intermingling among genets. Literature survey revealed that clonal tree species significantly differ from non-clonal species with respect to SGS, having 2.8-fold higher SGS. This led us to conclude that clonality is a life-history trait that can have deep impact on processes acting in populations of clonal tree species leading to significant SGS.

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Determinants of fine-scale spatial genetic structure in three co-occurring rain forest canopy trees in Borneo

Cited by 34 publications

References 52 publications

Spatial genetic structure in the very rare and species-rich Picea chihuahuana tree community (Mexico)

Spatial genetic structure in the very rare and species-rich Picea chihuahuana tree community (Mexico)

Fine‐scale Spatial Genetic Structure of Ten Dipterocarp Tree Species in a Bornean Rain Forest

Clonality as a driver of spatial genetic structure in populations of clonal tree species

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