scholarly journals Directional seed and pollen dispersal and their separate effects on anisotropy of fine‐scale spatial genetic structure among seedlings in a dioecious, wind‐pollinated, and wind‐dispersed tree species, Cercidiphyllum japonicum

2021 ◽  
Author(s):  
Atsushi Nakanishi ◽  
Susumu Goto ◽  
Chikako Sumiyoshi ◽  
Yuji Isagi
Keyword(s):  
Genetic Structure ◽  
Tree Species ◽  
Spatial Genetic Structure ◽  
Pollen Dispersal ◽  
Fine Scale ◽  
Cercidiphyllum Japonicum

Seed and pollen dispersal and fine-scale spatial genetic structure of a threatened tree species: Pericopsis elata (HARMS) Meeuwen (Fabaceae)

2021 ◽  
Vol 17 (3) ◽  
Author(s):  
Dieu - Merci Assumani Angbonda ◽  
Franck K. Monthe ◽  
Nils Bourland ◽  
Faustin Boyemba ◽  
Olivier J. Hardy
Keyword(s):  
Genetic Structure ◽  
Tree Species ◽  
Spatial Genetic Structure ◽  
Pollen Dispersal ◽  
Fine Scale ◽  
Threatened Tree Species

scholarly journals Are patterns of fine-scale spatial genetic structure consistent between sites within tropical tree species?

PLoS ONE ◽  
2018 ◽  
Vol 13 (3) ◽  
pp. e0193501
Author(s):  
James R. Smith ◽  
Jaboury Ghazoul ◽  
David F. R. P. Burslem ◽  
Akira Itoh ◽  
Eyen Khoo ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Tree Species ◽  
Spatial Genetic Structure ◽  
Tropical Tree ◽  
Fine Scale ◽  
Tropical Tree Species

Staying close: short local dispersal distances on a managed forest of two Patagonian Nothofagus species

2020 ◽  
Vol 93 (5) ◽  
pp. 652-661 ◽  
Author(s):  
Georgina Sola ◽  
Verónica El Mujtar ◽  
Leonardo Gallo ◽  
Giovanni G Vendramin ◽  
Paula Marchelli
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Spatial Genetic Structure ◽  
Pollen Dispersal ◽  
Dispersal Distance ◽  
Restricted Gene Flow ◽  
Fine Scale ◽  
Gene Dispersal ◽  
Mature Trees ◽  
The Impact

Abstract Understanding the impact of management on the dispersal potential of forest tree species is pivotal in the context of global change, given the implications of gene flow on species evolution. We aimed to determine the effect of logging on gene flow distances in two Nothofagus species from temperate Patagonian forests having high ecological relevance and wood quality. Therefore, a total of 778 individuals (mature trees and saplings) of Nothofagus alpina and N. obliqua, from a single plot managed 20 years ago (2.85 hectares), were mapped and genotyped at polymorphic nuclear microsatellite loci. Historical estimates of gene dispersal distance (based on fine-scale spatial genetic structure) and contemporary estimates of seed and pollen dispersal (based on spatially explicit mating models) were obtained. The results indicated restricted gene flow (gene distance ≤ 45 m, both pollen and seed), no selfing and significant seed and pollen immigration from trees located outside the studied plot but in the close surrounding area. The size of trees (diameter at breast height and height) was significantly associated with female and/or male fertility. The significant fine-scale spatial genetic structure was consistent with the restricted seed and pollen dispersal. Moreover, both estimates of gene dispersal (historical and contemporary) gave congruent results. This suggests that the recent history of logging within the study area has not significantly influenced on patterns of gene flow, which can be explained by the silviculture applied to the stand. The residual tree density maintained species composition, and the homogeneous spatial distribution of trees allowed the maintenance of gene dispersal. The short dispersal distance estimated for these two species has several implications both for understanding the evolution of the species and for defining management, conservation and restoration actions. Future replication of this study in other Nothofagus Patagonian forests would be helpful to validate our conclusions.

scholarly journals Fine-Scale Spatial Genetic Structure with Nonuniform Distribution of Individuals

Genetics ◽  
1998 ◽  
Vol 148 (2) ◽  
pp. 905-919
Author(s):  
Agnès Doligez ◽  
Claire Baril ◽  
Hélène I Joly
Keyword(s):  
Genetic Structure ◽  
Local Density ◽  
Isolation By Distance ◽  
Spatial Genetic Structure ◽  
Pollen Dispersal ◽  
Continuous Distribution ◽  
Fine Scale ◽  
Independent Locus ◽  
Continuous Plant ◽  
Input Variables

Abstract This paper presents the first theoretical study of spatial genetic structure within nonuniformly distributed continuous plant populations. A novel individual-based model of isolation by distance was constructed to simulate genetic evolution within such populations. We found larger values of spatial genetic autocorrelations in highly clumped populations than in uniformly distributed populations. Most of this difference was caused by differences in mean dispersal distances, but aggregation probably also produced a slight increase in spatial genetic structure. Using an appropriate level of approximation of the continuous distribution of individuals in space, we assessed the potential effects of density, seed and pollen dispersal, generation overlapping, and overdominance selection at an independent locus, on fine-scale genetic structure, by varying them separately in a few particular cases with extreme clumping. When selfing was allowed, all these input variables influenced both aggregation and spatial genetic structure. Most variations in spatial genetic structure were closely linked to variations in clumping and/or local density. When selfing was not allowed, spatial genetic structure was lower in most cases.

scholarly journals Fine-scale spatial genetic structure of eight tropical tree species as analysed by RAPDs

Heredity ◽  
2001 ◽  
Vol 87 (4) ◽  
pp. 497-507 ◽  
Author(s):  
Bernd Degen ◽  
Henri Caron ◽  
Eric Bandou ◽  
Laurent Maggia ◽  
Marie Héléne Chevallier ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Tree Species ◽  
Spatial Genetic Structure ◽  
Tropical Tree ◽  
Fine Scale ◽  
Tropical Tree Species

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

Biotropica ◽  
2011 ◽  
Vol 44 (5) ◽  
pp. 586-594 ◽  
Author(s):  
Tsuyoshi Harata ◽  
Satoshi Nanami ◽  
Takuo Yamakura ◽  
Shuhei Matsuyama ◽  
Lucy Chong ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Tree Species ◽  
Rain Forest ◽  
Spatial Genetic Structure ◽  
Fine Scale

Gene flow and fine-scale spatial genetic structure in Cabralea canjerana (Meliaceae), a common tree species from the Brazilian Atlantic forest

2016 ◽  
Vol 32 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Arthur Tavares de Oliveira Melo ◽  
Edivani Villaron Franceschinelli
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Atlantic Forest ◽  
Tree Species ◽  
Spatial Genetic Structure ◽  
Molecular Ecology ◽  
Spatial Distance ◽  
Forest Fragments ◽  
Fine Scale ◽  
Flow Process

Abstract:The Atlantic forest is the biome most severely affected by deforestation in Brazil. Cabralea canjerana spp. canjerana is a dioecious tree species with widespread distribution in the Neotropical region. This species is considered a model to ascertain population ecology parameters for endangered plant species from the Atlantic forest. Fine-scale spatial genetic structure and pollen-mediated gene flow are crucial information in landscape genetics and evolutionary ecology. A total of 192 adults and 121 offspring were sampled in seven C. canjerana populations in the Southern Minas Gerais State, Brazil, to assess whether pollen-mediated gene flow is able to prevent spatial genetic structure within and among Atlantic forest fragments. Several molecular ecology parameters were estimated using microsatellite loci. High levels of genetic diversity (HE = 0.732) and moderate population structure (θ = 0.133) were recorded. No significant association between kinship and spatial distance amongst individuals within each population (Sp = 0.000109) was detected. Current pollen-mediated gene flow occurs mainly within forest fragments, probably due to short-distance flights of the pollinator of C. canjerana, and also the forest fragmentation may have restricted flight distance. The high levels of genetic differentiation found amongst the seven sites sampled demonstrated how habitat fragmentation affects the gene flow process in natural areas.

scholarly journals Environmental effects on fine-scale spatial genetic structure in four Alpine keystone forest tree species

2018 ◽  
Vol 27 (3) ◽  
pp. 647-658 ◽  
Author(s):  
Elena Mosca ◽  
Erica A. Di Pierro ◽  
Katharina B. Budde ◽  
David B. Neale ◽  
Santiago C. González-Martínez
Keyword(s):  
Genetic Structure ◽  
Environmental Effects ◽  
Tree Species ◽  
Spatial Genetic Structure ◽  
Forest Tree ◽  
Fine Scale ◽  
Forest Tree Species
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