Genetic implications of silvicultural regimes

Finkeldey, Reiner; Ziehe, Martin

doi:10.1016/j.foreco.2004.05.036

Cited by 115 publications

(92 citation statements)

References 30 publications

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“…Forest management practices have also been shown to increase genetic structure compared with natural forests, especially if the breeding practices imply drastic reduction of the effective population size (Young and Merriam, 1994;Finkeldey and Ziehe, 2004). Population size reduction could potentially increase the rate of selffertilization because of the reduction in number of local compatible mates.…”

Section: Introductionmentioning

confidence: 99%

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

et al. 2009

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We have investigated the fine-scale spatial genetic structure in a managed Scots pine forest. For this purpose, we perform a Bayesian genetic-cluster analysis of 96 geographically mapped individual seed trees of Swedish Scots pine based on 14 microsatellite loci. The analysis was carried out with the recently developed program GENECLUST (François et al., 2006), which provides the facility to jointly incorporate both spatial information from a geographical neighborhood structure through a Potts-Dirichlet model and account for variable degrees of inbreeding within the clusters. To evaluate whether inbreeding and spatial interaction should be included in the best-fitting statistical model for our data, we used the deviance information criterion (DIC), a weighted measure of model fit that accounts for an effective number of free parameters in a model. Analysis shows that a model with a single estimated cluster, with high levels of inbreeding (0.25) and with a moderate amount of spatial dependency within the unique cluster (C ¼ 0.2-0.4), best explains the data. We also carried out Bayesian parentage analysis, which enabled us to exclude the possibility that the sample constitutes one single full-sib family.

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Section: Introductionmentioning

confidence: 99%

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

et al. 2009

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“…Finkeldey and Ziehe (2004), in a review of the genetic implications of silvicultural regimes, noticed that genetic structure differences in managed versus unmanaged forests are difficult to monitor because of life-cycle characteristics of most forest tree species. This usually determines a time lag before the consequences of disturbances, such as habitat fragmentation or exploitation, can be detected (Kramer et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Comparison of pollen gene flow among four European beech (Fagus sylvatica L.) populations characterized by different management regimes

et al. 2011

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The study of the dispersal capability of a species can provide essential information for the management and conservation of its genetic variability. Comparison of gene flow rates among populations characterized by different management and evolutionary histories allows one to decipher the role of factors such as isolation and tree density on gene movements. We used two paternity analysis approaches and different strategies to handle the possible presence of genotyping errors to obtain robust estimates of pollen flow in four European beech (Fagus sylvatica L.) populations from Austria and France. In each country one of the two plots is located in an unmanaged forest; the other plots are managed with a shelterwood system and inside a colonization area (in Austria and France, respectively). The two paternity analysis approaches provided almost identical estimates of gene flow. In general, we found high pollen immigration (B75% of pollen from outside), with the exception of the plot from a highly isolated forest remnant (B50%). In the two unmanaged plots, the average within-population pollen dispersal distances (from 80 to 184 m) were higher than previously estimated for beech. From the comparison between the Austrian managed and unmanaged plots, that are only 500 m apart, we found no evidence that either gene flow or reproductive success distributions were significantly altered by forest management. The investigated phenotypic traits (crown area, height, diameter and flowering phenology) were not significantly related with male reproductive success. Shelterwood seems to have an effect on the distribution of within-population pollen dispersal distances. In the managed plot, pollen dispersal distances were shorter, possibly because adult tree density is three-fold (163 versus 57 trees per hectare) with respect to the unmanaged one.

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“…Another factor explaining the deviation from HWE may be the very few effective outcross males contributing to pollination in the Norway spruce (Burczyk et al, 2004). Fertility components that are known to vary strongly from year to year for trees (Finkeldey and Ziehe, 2004) may possibly explain such an uneven contribution from outcrossing trees.…”

Section: Mating Within Standsmentioning

confidence: 99%

Combined analysis of nuclear and mitochondrial markers provide new insight into the genetic structure of North European Picea abies

et al. 2009

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Norway spruce of northern Europe expanded at the end of the last glacial out of one refugium in Russia. To provide a detailed insight into how the genetic structure in the northern European lineage of this species has been shaped by postglacial migration, recurrent pollen flow and marginality, we here compare variation at seven highly variable nuclear microsatellite loci in 37 populations (1715 trees) with mitochondrial DNA variation. Microsatellite diversity was high (H E ¼ 0.640) and genetic differentiation was low (F ST ¼ 0.029). The microsatellite structure supported a mitochondrial DNA (mtDNA)-based hypothesis of two migration routes out of a single Russian refugium; one northwestern over Finland to northern Scandinavia, and one southwestern across the Baltic Sea into southern Scandinavia. Microsatellite diversity was maintained along the southwestern migration routes, whereas a significant decrease was observed towards the north. In contrast, the mtDNA diversity suggested higher amounts of historical gene flow towards the north than along the southwestern migration route. This suggests that the loss of nuclear diversity after postglacial colonization has been efficiently replenished by pollen-mediated gene flow in the south. Towards the north, smaller effective population size because of more limited seed and pollen production may have caused decreased nuclear diversity and increased inbreeding, reflecting the ecological marginality of the species in the north.

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Genetic implications of silvicultural regimes

Cited by 115 publications

References 30 publications

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

Joint analysis of spatial genetic structure and inbreeding in a managed population of Scots pine

Comparison of pollen gene flow among four European beech (Fagus sylvatica L.) populations characterized by different management regimes

Combined analysis of nuclear and mitochondrial markers provide new insight into the genetic structure of North European Picea abies

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