Allozyme and microsatellite data reveal small clone size and high genetic diversity in aspen in the southern Cascade Mountains

Woody, Jennifer De; Rickman, Tom H.; Jones, Bobette E.; Hipkins, Valerie D.

doi:10.1016/j.foreco.2009.05.006

Cited by 32 publications

(33 citation statements)

References 43 publications

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“…We also assumed that each different genotype originated from a different seed; the probability that these assumptions are true depends on the number of loci and variability of isoenzymatic systems used in clonal identification. DeWoody et al (2009) demonstrated that the ability of isoenzyme markers to dinstinguish clones in P. tremuloides is similar to that using DNA markers as microsatellites, provided an appropriate number of markers. The discriminating power of the isoenzyme analysis was calculated by the Aspinwall & Christian (1992) estimator.…”

Section: Genetic Analysismentioning

confidence: 89%

“…Escudero & Sierra-de-Grado (2010) from different seeds. DeWoody et al (2009) demonstrated that the majority of intrastand variation in Populus tremuloides Michx. was likely due to the presence of different clones rather than somatic mutation in old trees.…”

Section: Introductionmentioning

confidence: 99%

“…seeds disperse and germinate in areas cleared by recent disturbances, establish new stands, produce new travelling seeds and, after some time, are extinguished by disturbances such as strong winds or flooding. The above dynamic determines the existence of metapopulations, which are considered genetically interconnected collections of isolated individuals, clumps and stands that colonise and become extinct locally while maintaining a long-term presence over a wider area , Suvanto & Latva-Karjanmaa 2005, DeWoody et al 2009). In particular, P. tremula forms metapopulations over a wide range of environmental conditions; it can be found along riverbanks and colonising eroded rocky slopes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Clonal structure and dynamics of peripheral Populus tremula L. populations

Cristóbal¹,

Martínez‐Zurimendi²,

Villamediana³

et al. 2014

iForest

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Section: Genetic Analysismentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Clonal structure and dynamics of peripheral Populus tremula L. populations

Cristóbal¹,

Martínez‐Zurimendi²,

Villamediana³

et al. 2014

iForest

View full text Add to dashboard Cite

“…Historically, it had been assumed that aspen sexual reproduction was exceedingly rare (Ellison 1943, Mueggler 1988, Romme et al 2005, clones were thousands of years old (Einspahr andWinton 1976, McDonough 1985), stands were always successional to conifers (Baker 1925), and that genetic diversity was low. However, numerous aspen seedlings have been found after disturbance in recent years (Turner et al 2003, Landhäusser et al 2010, Krasnow et al 2012, Fairweather et al 2014) and a growing number of studies have shown that aspen stands contain much more genetic diversity than once assumed (Jelinski and Cheliak 1992, Hipkins and Kitzmiller 2004, Mock et al 2008, De Woody et al 2009), indicating that seedling establishment is likely more common than once thought, and that many stands are not as ancient as once assumed. Measured by its range alone, aspen could be considered the most successful disperser in North America.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, there has been a major effort to assess the conditions of current stands to identify those that are at the highest risk of being lost, indicated by a high level of conifer encroachment, major component of sagebrush understory, inadequate regeneration, and/or high levels of disease (Burton 2004). In the past decade, over 70% of assessed stands in the Sierra Nevada have been classified as moderate to highest risk of being lost (Shepperd et al 2006, De Woody et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Evolving paradigms of aspen ecology and management: impacts of stand condition and fire severity on vegetation dynamics

Krasnow

Stephens

2015

Ecosphere

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Abstract. Quaking aspen (Populus tremuloides Michx.) comprises only a small fraction of western USAforests, yet contributes significant biological diversity and is considered by many to be the most important deciduous forest type in western North America. There is currently a high level of concern in the western United States as many seral aspen populations are declining in vigor due to drought, ungulate browsing, and lack of disturbance. It is also highly uncertain if aspen will successfully accommodate future climate warming via migration through seedling establishment, which has been assumed to be extremely rare. In recent years, fundamental assumptions concerning aspen clonal age, regeneration, and genetic diversity have been challenged, and these findings have important implications for management and persistence of aspen in western USA forests. In this study, we compared regeneration dynamics of aspen revitalization strategies (conifer removal and prescribed fire) to unplanned wildfires of low, moderate, and high severity in the Sierra Nevada, and related multiple components of pre-fire stand composition to post-fire aspen regeneration. To better understand the viability of aspen migration to accommodate future climate warming, we examined recent events of aspen seedling establishment. We found substantial evidence that greater disturbance severity yields increased aspen sprout density and growth rates, and that live conifer and/or dead aspen basal area in a stand before a fire reduces post fire sprout density. Additionally, we found evidence that aspen seedling establishment is more common than has been assumed, and represents a viable means for aspen migration. Future climate changes will present both challenges and opportunities for aspen. Increased temperatures and drought will stress existing populations, but increased high severity fire in forested areas, may provide opportunity for successful aspen migration and genet establishment. In addition to revitalizing existing aspen stands, future management goals should include the establishment of new stands in more suitable habitat.

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Decline in the strength of genetic controls on aspen environmental responses from seasonal to century‐long phenomena

et al. 2019

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Understanding intra‐specific variation in climate sensitivity could improve the prediction of tree responses to climate change. We attempted to identify the degree of genetic control of tree phenology and growth of trembling aspen (Populus tremuloides Mchx.) in a natural stand of this species in northwestern Quebec. We mapped and genotyped 556 aspen trees growing within the plot, using seven nuclear microsatellite loci for clone identification. We selected 13 clones (n of trees per clone >5, in total 350 trees) and evaluated the explanatory power of clone identity in (a) variability of spring leaf phenology and (b) short‐ and long‐term growth responses. The clone's identity explained 43% of the variability in spring leaf phenology, between 18% and 20% of variability in response to monthly climate variables significantly affecting growth, between 8% and 26% of growth response to insect outbreaks, and 12% in the long‐term growth rates. Strong clonal control of aspen phenology and moderate control of growth responses to monthly weather do not result in an equally large impact on long‐term growth rates. The result suggests an important role of environmental extremes and within community interactions as factors averaging aspen growth performance at the stand level.

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Allozyme and microsatellite data reveal small clone size and high genetic diversity in aspen in the southern Cascade Mountains

Cited by 32 publications

References 43 publications

Clonal structure and dynamics of peripheral Populus tremula L. populations

Clonal structure and dynamics of peripheral Populus tremula L. populations

Evolving paradigms of aspen ecology and management: impacts of stand condition and fire severity on vegetation dynamics

Decline in the strength of genetic controls on aspen environmental responses from seasonal to century‐long phenomena

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