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Interior Ponderosa Pine (Pinus ponderosa var. scopulorum Engelm.) Genetic Profiles, Chemistry, Growth Rates, and Climate Sensitivity in Relation to Mountain Pine Beetle (Dendroctonus ponderosae Hopkins) Predation

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Vydáno v:Forests vol. 16, no. 9 (2025), p. 1453-1473
Hlavní autor: Six, Diana L
Další autoři: Alverson, Hannah R
Vydáno:
MDPI AG
Témata:
United States > US
National parks
Volatile organic compounds > VOCs
Growth rate
Bark
Pheromones
Beetles
Phenotypes
Chemistry
Climate change
Genetic structure
Genotypes
Forests
Genetic diversity
Mountains
Trees
Terpenes
Pine trees
Evergreen trees
Climatic conditions
Sensitivity
Predation
Growth patterns
Host selection
Preferences
Haplotypes
Metabolites
Pine
Climate prediction
Pinus ponderosa
Coleoptera
Dendroctonus ponderosae
Environmental
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Abstrakt:Tree phenotypes vary because of genotype–climate interactions, and this variation influences host selection by tree-killing bark beetles. As climate-driven bark beetle outbreaks intensify, identifying phenotypic traits that best predict resistance or susceptibility is critical. We examined genetic variation, secondary chemistry, growth rates, and climate sensitivity in interior ponderosa pine (Pinus ponderosa var. scopulorum Engelm.) at two sites in the Black Hills—Devils Tower National Monument (DETO), Wyoming, and Wind Cave National Park (WICA), South Dakota—experiencing low-moderate levels of mountain pine beetle (Dendroctonus ponderosae Hopkins) activity. Genetic structure differed between sites. At DETO, large and small trees formed a single genetic cluster, whereas at WICA, two clusters emerged, one consisting of large trees and another comprising both small and large trees. The concentrations of some terpenes also differed between sites. Compared to beetle-killed trees, surviving trees exhibited distinct lifelong growth patterns and greater sensitivity to climate. Notably, surviving trees showed significant correlations of growth with climate variables, while beetle-killed trees were relatively insensitive. Long-term responsiveness of growth to climate was a stronger predictor of tree susceptibility to beetles than responses in years just before attacks occurred. These findings suggest trees with lower sensitivity to climate may be more vulnerable to beetle attack under changing climatic conditions.
ISSN:1999-4907
DOI:10.3390/f16091453
Zdroj:Agriculture Science Database