Fine-scale spatial genetic dynamics over the life cycle of the tropical tree Prunus africana

Berens, Dana G.; Braun, Carsten; González‐Martínez, Santiago C.; Griebeler, Eva Maria; Nathan, Ran; Böhning‐Gaese, Katrin

doi:10.1038/hdy.2014.40

Cited by 19 publications

(27 citation statements)

References 44 publications

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“…Chung et al 2003;Berens et al 2014). Furthermore, the fragmented habitat in Ontario, coupled with relatively high levels of genetic differentiation among some sites, multiple private alleles in Norfolk or Niagara, and discrete genetic clusters within both regions, suggest that unless trees are managed, later generations are unlikely to introduce new alleles into populations, in which case genetic drift will erode genetic diversity.…”

Section: Sustainability Of Genetic Diversitymentioning

confidence: 97%

Conservation genetics of Magnolia acuminata, an endangered species in Canada: Can genetic diversity be maintained in fragmented, peripheral populations?

2015

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The genetic diversity of peripheral populations is potentially important to the future adaptive capacity of species, although may be difficult to predict. A large number of species-at-risk in Canada are at the northern edge of their distribution, and many of these live in fragmented habitat. We used nuclear and chloroplast markers to assess patterns of genetic diversity and differentiation within and among populations of Canadian Magnolia acuminata (Cucumber tree), an endangered species in Canada that extends as far north as the fragmented Carolinian forest in southern Ontario. We also compared the genetic composition of Canadian M. acuminata to populations sampled throughout its central distribution in the USA. We found a high proportion of shared microsatellite alleles, plus a single cpDNA haplotype, distributed throughout the entire M. acuminata range. We also found that despite occupying fragmented habitat at their range periphery, Canadian populations showed little reduction in genetic diversity relative to the USA populations, and we attribute this to effective historical dispersal in a longlived, polyploid species. However, a combination of private alleles, genetic substructuring, and lower levels of genetic diversity in seedlings compared to mature trees, suggests that current levels of gene flow are relatively low among Canadian populations. Therefore, despite high levels of genetic diversity in Canadian M. acuminata, managers should be aware that without intervention, populations will likely become increasingly isolated and experience a reduction in genetic diversity which in turn may threaten their long-term survival in Canada.

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Section: Sustainability Of Genetic Diversitymentioning

confidence: 97%

Conservation genetics of Magnolia acuminata, an endangered species in Canada: Can genetic diversity be maintained in fragmented, peripheral populations?

2015

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“…Studies exploring temporal changes in FSGS indicate that it is was diluting over time from seedlings to adults (Chung et al 2003;Zhou and Chen 2010) and from initially colonized to fully established populations (Chung et al 2007), although a reverse trend is also noted (Pardini and Hamrick 2008;Berens et al 2014). The populations of black cherry from the Zielonka Forest complex representing different stages of the invasive spread presented very similar low intensities and extents of FSGS and varied sibship structures (Fig.…”

Section: Fsgs In Colonization and Established Populationmentioning

confidence: 95%

“…To get the full picture of an invasion process it also seems particularly necessary to study the process across invasion stages (e.g. colonizing and established population), environmental and landscape complexity or habitat features (Berens et al 2014). A deep understanding of invasive genetics in a wider ecological perspective may be used for tailoring efficient management strategies for alien invasive species.…”

Section: Introductionmentioning

confidence: 99%

Spatial genetic structure and clonality of Prunus serotina Ehrh. during invasive spread into Scots pine forests

Dering¹,

Sękiewicz²,

Iszkuło³

et al. 2018

Silva Fenn.

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(2018). Spatial genetic structure and clonal structure of Prunus serotina during invasive spread. Silva Fennica vol. 52 no. 3 article id 9987. 21 p. https://doi.org/10.14214/sf.9987 Highlights• The spread of Prunus serotina in invaded forests is facilitated by high propagule pressure.• The seed shadow overlap prevents strong spatial genetic structure.• During colonization of isolated site, a strong spatial genetic structure is produced due to founder effect.• Overall clonality in P. serotina was low but may efficiently support seedling bank thus contributing to species invasiveness. AbstractPrunus serotina Ehrh. (black cherry) is one of the most important invaders in the European forests, but existing studies have given limited insight into demo-genetic factors underpinning the process of species invasion. Fine-scale genetic structure (FSGS) may deliver important knowledge on genetics of invasion contributing to efficient management of the alien species. Using eight microsatellites we investigated FSGS, clonal structure and relatedness in four black cherry populations which represented different stages of the invasive spread into Scots pine forests. Three populations were in a continuous forest complex and represented the colonization (Z_1) and established stages (Z_2 and Z_3). To investigate how colonization ability of the species is modified by landscape features, we analyzed an isolated population at colonization stage located in limited forest patch located in an agricultural landscape (R). Populations from continuous forest showed low yet significant positive FSGS with Sp = 0.0068 in Z_1, 0.0054 in Z_2, and 0.0066 in Z_3, while in R spatial structure was the strongest (0.0145). Considerable relatedness noted in population R suggests a dominance of within-population mating and recruitments, low immigration rate and limited seed dispersal, all of which led to the observed strong FSGS. Also, we presume that a founder effect likely involved during colonization of isolated forest patch R led to strong FSGS. In contrary, the seed shadow overlap in the populations from continuous forest prevented strong FSGS and facilitated colonization. Despite of low level of clonality, we argue that it may efficiently support black cherry seedling bank contributing to species invasiveness.

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“…Studies dealing with the temporal scale of SGS have been mostly aimed at disentangling how demography affects SGS by comparing among age-classes15161718. In perennials, age-classes coexist in the same spatio-temporal context, implying that individuals initially from different cohorts classes may interbreed.…”

mentioning

confidence: 99%

Inter-annual maintenance of the fine-scale genetic structure in a biennial plant

Valverde

Gómez

García

et al. 2016

Sci Rep

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Within plant populations, space-restricted gene movement, together with environmental heterogeneity, can result in a spatial variation in gene frequencies. In biennial plants, inter-annual flowering migrants can homogenize gene frequencies between consecutive cohorts. However, the actual impact of these migrants on spatial genetic variation remains unexplored. Here, we used 10 nuclear microsatellite and one plastid genetic marker to characterize the spatial genetic structure within two consecutive cohorts in a population of the biennial plant Erysimum mediohispanicum (Brassicaceae). We explored the maintenance of this structure between consecutive flowering cohorts at different levels of complexity, and investigated landscape effects on gene flow. We found that cohorts were not genetically differentiated and showed a spatial genetic structure defined by a negative genetic-spatial correlation at fine scale that varied in intensity with compass directions. This spatial genetic structure was maintained when comparing plants from different cohorts. Additionally, genotypes were consistently associated with environmental factors such as light availability and soil composition, but to a lesser extent compared with the spatial autocorrelation. We conclude that inter-annual migrants, in combination with limited seed dispersal and environmental heterogeneity, play a major role in shaping and maintaining the spatial genetic structure among cohorts in this biennial plant.

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Fine-scale spatial genetic dynamics over the life cycle of the tropical tree Prunus africana

Cited by 19 publications

References 44 publications

Conservation genetics of Magnolia acuminata, an endangered species in Canada: Can genetic diversity be maintained in fragmented, peripheral populations?

Conservation genetics of Magnolia acuminata, an endangered species in Canada: Can genetic diversity be maintained in fragmented, peripheral populations?

Spatial genetic structure and clonality of Prunus serotina Ehrh. during invasive spread into Scots pine forests

Inter-annual maintenance of the fine-scale genetic structure in a biennial plant

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