Gene movement and genetic association with regional climate gradients in California valley oak (Quercus lobata Née) in the face of climate change

@article{Sork2010GeneMA,
  title={Gene movement and genetic association with regional climate gradients in California valley oak (Quercus lobata N{\'e}e) in the face of climate change},
  author={Victoria L. Sork and Frank W. Davis and Robert D. Westfall and Alan L. Flint and Makihiko Ikegami and Hongfang Wang and Delphine Grivet},
  journal={Molecular Ecology},
  year={2010},
  volume={19}
}
Rapid climate change jeopardizes tree populations by shifting current climate zones. To avoid extinction, tree populations must tolerate, adapt, or migrate. Here we investigate geographic patterns of genetic variation in valley oak, Quercus lobata Née, to assess how underlying genetic structure of populations might influence this species’ ability to survive climate change. First, to understand how genetic lineages shape spatial genetic patterns, we examine historical patterns of colonization… 
Influence of late Quaternary climate change on present patterns of genetic variation in valley oak, Quercus lobata Née
TLDR
Results highlight the lingering effect of past climate on genetic variation in species with stable distributions as climate can influence local expansion–contraction dynamics, flowering phenology and thus gene flow, and/or impose selective pressures.
Landscape genomic analysis of candidate genes for climate adaptation in a California endemic oak, Quercus lobata.
PREMISE OF THE STUDY The ability of California tree populations to survive anthropogenic climate change will be shaped by the geographic structure of adaptive genetic variation. Our goal is to test
Landscape genomics provides evidence of climate‐associated genetic variation in Mexican populations of Quercus rugosa
TLDR
It was found that spatial patterns of genetic variation were most strongly associated with precipitation seasonality and geographic distance, and a nonlinear multivariate model, Gradient Forests, was deployed to map turnover in allele frequencies along environmental gradients and predict areas most sensitive to climate change.
Association of genetic and phenotypic variability with geography and climate in three southern California oaks.
TLDR
Comparison of the association of geography and climate of three oak species in an environmentally heterogeneous region of southern California illustrates that climate influences tree response at all organizational levels, but the important climate factors vary depending on the level and on the species.
Contrasted patterns of local adaptation to climate change across the range of an evergreen oak, Quercus aquifolioides
TLDR
It is suggested that different within‐species adaptation processes occur in species occurring in heterogeneous environments, and risk of nonadaptedness (RONA) analyses suggested HDM‐WSP lineage will have a better capacity to adapt in the predicted future climate compared with the Tibet lineage.
Influence of environmental heterogeneity on genetic diversity and structure in an endemic southern Californian oak
TLDR
It is found that genetic diversity is negatively associated with local climatic stability since the LGM, which may be due to higher immigration rates in unstable patches during favourable climatic periods and/or temporally varying selection.
Ancient events and climate adaptive capacity shaped distinct chloroplast genetic structure in the oak lineages
TLDR
This study investigated whether closely related Quercus lineages have similar spatial genetic structures and moreover, what roles have their geographic distribution, ecological tolerance, and historical environmental changes played in the similar or distinct genetic structures.
Association of transcriptome-wide sequence variation with climate gradients in valley oak (Quercus lobata)
TLDR
Preliminary support is provided for the hypothesis that balancing selection maintains diversity in climate-adaptive genes by identifying 79 SNPs from 49 transcripts as candidates under natural selection by climate.
Landscape genetics and population structure in Valley Oak (Quercus lobata Née).
TLDR
The southernmost population of Quercus lobata sampled from the Santa Monica area comprised a separate genetic cluster from the rest of the species, suggesting that Transverse Ranges such as the San Gabriel Mountains limit gene flow.
Differential effects of landscape‐level environmental features on genetic structure in three codistributed tree species in Central America
TLDR
This study confirms suggestions from previous studies of Central American tree species that imply that population genetic structure of trees in this region is determined by complex interactions of both historical and current barriers to gene flow.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 101 REFERENCES
Conserving the evolutionary potential of California valley oak (Quercus lobata Née): a multivariate genetic approach to conservation planning
TLDR
These findings, based on the distribution of multivariate genotypes and allelic richness, identify areas with distinctive histories and genetic composition that should be given priority in reserve network design, especially because these areas also overlap with landscape change and little degree of protection.
Back to nature: ecological genomics of loblolly pine (Pinus taeda, Pinaceae)
TLDR
Functional annotation of those genes with putative orthologs in Arabidopsis revealed a diverse set of abiotic stress response genes ranging from transmembrane proteins to proteins involved in sugar metabolism, illustrating a first step towards a ecosystem perspective of population genomics for non‐model organisms.
Gene flow and fine-scale genetic structure in a wind-pollinated tree species, Quercus lobata (Fagaceaee).
TLDR
It is concluded that adult spatial structure is indicative of strong historical signature of "isolation by distance" and provides a useful reference value against which to gauge the future gene flow consequences of ongoing anthropogenic disturbance.
Natural selection and climate change: temperature‐linked spatial and temporal trends in gene frequency in Fagus sylvatica
TLDR
The results show that F. sylvatica populations may show some capacity for an in situ adaptive response to climate change, however as reported ongoing distributional changes demonstrate, this response is not enough to allow all populations of this species to persist in all of their current locations.
Response of forest trees to global environmental changes
Adaptation, migration or extirpation: climate change outcomes for tree populations
TLDR
As all tree species will be suffering lags, interspecific competition may weaken, facilitating persistence under suboptimal conditions, and species with small populations, fragmented ranges, low fecundity, or suffering declines due to introduced insects or diseases should be candidates for facilitated migration.
Global Climate Change and Tropical Forest Genetic Resources
Global climate change may have a serious impact on genetic resources in tropical forest trees. Genetic diversity plays a critical role in the survival of populations in rapidly changing environments.
Pollen movement in declining populations of California Valley oak, Quercus lobata: where have all the fathers gone?
TLDR
Pollen movement in a savannah population of Valley oak at Sedgwick Reserve, Santa Barbara County, is studied to estimate effective number of pollen donors (Nep) and average distance of effective pollen movement (δ), indicating fewer effective fathers than one might expect for wind‐pollinated species and fewer than observed elsewhere.
Genomic signals of diversification along ecological gradients in a tropical lizard
TLDR
Findings indicate adaptive diversification in T. affinis may be taking place along the forest–ecotone gradient during range expansions or contractions, and that refugial isolation augmented by divergent adaptation to different rainforest environments appears to play a less significant role.
Modeled regional climate change and California endemic oak ranges.
TLDR
Using a RCM-based future climate scenario, it is found that potential ranges of two California endemic oaks, quercus douglasii and Quercus lobata, shrink considerably and shift northward.
...
1
2
3
4
5
...