Genetic and Spatial Structuring of Populus tremuloides in a Mixed-Species Forest of Southwestern Utah, USA

Bishop, M. B.; Furniss, Tucker J.

doi:10.3398/064.079.0107

Cited by 10 publications

(6 citation statements)

References 30 publications

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“…It is likely that a combination of the dispersed tree‐islands and differences in community richness are contributing to the strong stochasticity at the Wellsville Mountains. Interestingly, the Pseudotsuga at Cedar Breaks were also separated from one another within a forest dominated by other conifers (Bishop et al, 2019). The difference between the isolation of the tree islands at the Wellsville Mountains and the isolated Pseudotsuga at Cedar Breaks may be due to the contiguous nature of the forest at Cedar Breaks, which overwhelmingly consists of ectomycorrhizal trees (Furniss et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Dancing with Douglas‐fir: Determinism dominates fungal community assembly processes

Birch

Lutz

Karst³

2022

Journal of Ecology

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Fungal communities can influence the productivity, composition and survival of trees through cycling nutrients, providing resources and altering pathogens. Thus, shifts in fungal communities could impact forests by altering interactions between trees and their environments. Fungal community composition may be shaped by stochastic and deterministic processes such as dispersal limitation, environmental filtering and partner specificity between trees and fungi. For tree species with large geographical ranges, we expect fungal assembly processes to change with environmental variation across the range of the tree partner. Due to specificity between trees and symbiotic fungi, we expect deterministic to outweigh stochastic processes in root compared with soil fungi. As some tree species have exceptional longevity, we also expected tree age to influence fungal community assembly. We surveyed fungi in four stands of Pseudotsuga menziesii with tree ages up to 800 years along an 1,800 km transect. We sampled roots and soil around 12 P. menziesii in each stand, aged the trees, and sequenced fungal rDNA to determine composition and richness from which we calculated the relative role of deterministic and stochastic assembly processes. We used null models to evaluate the relative importance of deterministic variable and homogenizing selection, and stochastic dispersal limitation, drift and homogenizing dispersal in fungal community assembly. We detected 7,280 amplicon sequence variants with 5,270 associated with soil, 3,887 with roots and 1,877 found across both roots and soils. Deterministic processes dominated root and soil fungal communities at all sites except one where stochastic processes (i.e. dispersal limitation and drift) controlled root fungi. Despite the dominance of determinism in fungal community assembly, the proportion of processes differed by site. Assembly processes did not vary with tree age. Synthesis. Taken together, we suggest that the local environment, water limitation and partner‐preference between trees and their associated fungi, influence fungal community composition across the range of P. menziesii. We conclude that while fungal communities occurring near P. menziesii are dominated by homogenizing selection, the role of neutral processes still has a minor influence on community assembly and may be important in spatially isolated communities and those with strong gradients of fungal diversity.

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Section: Discussionmentioning

confidence: 99%

Dancing with Douglas‐fir: Determinism dominates fungal community assembly processes

Birch

Lutz

Karst³

2022

Journal of Ecology

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“…In the Intermountain West, large clones also occur, some covering up to 430,000 m 2 (DeWoody et al 2008). Many of these larger clones are triploid (Bishop et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Cytotype and genotype predict mortality and recruitment in Colorado quaking aspen (Populus tremuloides)

Blonder

Ray

Walton

et al. 2021

Ecological Applications

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Species responses to climate change depend on environment, genetics, and interactions among these factors. Intraspecific cytotype (ploidy level) variation is a common type of genetic variation in many species. However, the importance of intraspecific cytotype variation in determining demography across environments is poorly known. We studied quaking aspen (Populus tremuloides), which occurs in diploid and triploid cytotypes. This widespread tree species is experiencing contractions in its western range, which could potentially be linked to cytotype‐dependent drought tolerance. We found that interactions between cytotype and environment drive mortality and recruitment across 503 plots in Colorado. Triploids were more vulnerable to mortality relative to diploids and had reduced recruitment on more drought‐prone and disturbed plots relative to diploids. Furthermore, there was substantial genotype‐dependent variation in demography. Thus, cytotype and genotype variation are associated with decline in this foundation species. Future assessment of demographic responses to climate change will benefit from knowledge of how genetic and environmental mosaics interact to determine species’ ecophysiology and demography.

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“…Diploids are more common in eastern and boreal populations, while triploids are more common in the southwest portion of the range (Callahan et al, ; Mock et al, ). Nevertheless, co‐occurrence of diploids and triploids within sites at <100 m spatial scales is common (Bishop, Furniss, Mock, & Lutz, ; Mock, Rowe, Hooten, Dewoody, & Hipkins, ). These conclusions are based on a relatively limited set of available data, so that finer‐scale spatial patterns of ploidy level variation, or their consequences, remain unknown.…”

Section: Introductionmentioning

confidence: 99%

Remote sensing of ploidy level in quaking aspen (Populus tremuloides Michx.)

et al. 2019

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1. Ploidy level in plants may influence ecological functioning, demography and response to climate change. However, measuring ploidy level typically requires intensive cell or molecular methods. 2. We map ploidy level variation in quaking aspen, a dominant North American tree species that can be diploid or triploid and that grows in spatially extensive clones.We identify the predictors and spatial scale of ploidy level variation using a combination of genetic and ground-based and airborne remote sensing methods.3. We show that ground-based leaf spectra and airborne canopy spectra can both classify aspen by ploidy level with a precision-recall harmonic mean of 0.75-0.95 and Cohen's kappa of c. 0.6-0.9. Ground-based bark spectra cannot classify ploidy level better than chance. We also found that diploids are more common on higher elevation and steeper sites in a network of forest plots in Colorado, and that ploidy level distribution varies at subkilometer spatial scales. 4. Synthesis. Our proof-of-concept study shows that remote sensing of ploidy level could become feasible in this tree species. Mapping ploidy level across landscapes could provide insights into the genetic basis of species' responses to climate change. K E Y W O R D S adaptation, ploidy level, polyploidy, quaking aspen, reflectance, remote sensing, spectrometry, UAS S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section at the end of the article. How to cite this article: Blonder B, Graae BJ, Greer B, et al. Remote sensing of ploidy level in quaking aspen (Populus tremuloides Michx.). J Ecol. 2020;108:175-188. https ://doi.

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Genetic and Spatial Structuring of Populus tremuloides in a Mixed-Species Forest of Southwestern Utah, USA

Cited by 10 publications

References 30 publications

Dancing with Douglas‐fir: Determinism dominates fungal community assembly processes

Dancing with Douglas‐fir: Determinism dominates fungal community assembly processes

Cytotype and genotype predict mortality and recruitment in Colorado quaking aspen (Populus tremuloides)

Remote sensing of ploidy level in quaking aspen (Populus tremuloides Michx.)

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