Landscape Features and Processes Influencing Forest Pest Dynamics

Ferrenberg, Scott

doi:10.1007/s40823-016-0005-x

Cited by 18 publications

(17 citation statements)

References 109 publications

(204 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…). Spatiotemporal patterns in tree defenses are an important feature of the landscape that affects forest pest dynamics (Ferrenberg ). Indeed, range expansion by insects has been linked to greater susceptibility of host plants within novel vs. historical ranges (Desurmont et al.…”

Section: Discussionmentioning

confidence: 99%

“…A greater understanding of the drivers of spatiotemporal patterns in tree defenses is necessary to improve predictions of forest pest dynamics (Holdenrieder et al. , Ferrenberg ).…”

Section: Discussionmentioning

confidence: 99%

“…This spatial variation in tree defenses, particularly as it relates to landscape features, has important implications for pest outbreaks (Holdenrieder et al. , Ferrenberg ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Resin monoterpene defenses decline within three widespread species of pine (Pinus) along a 1530‐m elevational gradient

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract. The elevational gradient in plant defense (EGPD) hypothesis posits that natural enemy pressures increase alongside temperature across elevational climatic gradients, thereby selecting for enhanced defenses at lower elevations while leaving plants less defended at higher elevations. Phylogenetically constrained tests of this hypothesis are uncommon, with tests focused on defenses of mature trees in natural settings being exceedingly rare. In the absence of this information, predicting the spatiotemporal dynamics of forest pests that preferentially attack mature trees is rendered more difficult. Tree properties such as age, growth rate, and size have all been correlated with levels of tree defenses against insect pests. Thus, we sought to disentangle the interacting influences of these properties from possible elevational climatic effects on monoterpene concentrations, diversity, and intraspecific dissimilarity of constitutive resin within three widespread pines (Pinus contorta, Pinus ponderosa, and Pinus flexilis) across a 1530-m elevational transect in the Rocky Mountains, Colorado, USA. Overall, we found some support for the EGPD hypothesis within all three of the pine species studied. However, while elevation and tree properties were strong predictors of the variation in monoterpene concentration and moderate predictors of variation in diversity and dissimilarity in P. contorta, they were a relatively weak set of predictors in P. ponderosa and P. flexilis. Significant, (negative) elevational effects were found for total monoterpene concentration in P. contorta and monoterpene diversity in P. ponderosa, while elevation had a significant negative effect on monoterpene concentration and diversity, and a positive effect on dissimilarity in P. flexilis. Nevertheless, tree age, size, and/or growth measures had significant influences on one or more monoterpene measures in all three of the pine species indicating a need to parse effects of these factors within studies of tree defenses across environmental gradients. Our results offer some support for the EGPD hypothesis while suggesting the presence of a variable hierarchy of drivers of pine defense and resistance across congeners in shared environments-a situation that presents challenges for predicting spatiotemporal patterns in secondary chemistry across species from a common set of potential drivers.

show abstract

Section: Discussionmentioning

confidence: 99%

“…A greater understanding of the drivers of spatiotemporal patterns in tree defenses is necessary to improve predictions of forest pest dynamics (Holdenrieder et al. , Ferrenberg ).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Resin monoterpene defenses decline within three widespread species of pine (Pinus) along a 1530‐m elevational gradient

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…At the same time, trees with these properties would also be more defended (in terms of total monoterpene concentration) at lower elevations. Spatiotemporal patterns in tree defenses are an important feature of the landscape that affects forest pest dynamics (Ferrenberg 2016). Indeed, range expansion by insects has been linked to greater susceptibility of host plants within novel versus historical ranges (Desurmont et al 2011).…”

Section: Resultsmentioning

confidence: 99%

“…As a result, tree defense phenotypes can vary substantially within and among populations (Moreira et al 2014;Ferrenberg, Kane & Langenhan 2015;Vogan & Schoettle 2015;Zinkgraf et al 2015;Harper et al 2016). This spatial variation in tree defenses, particularly as it relates to landscape features, has important implications for pest outbreaks (Holdenrieder et al 2004;Ferrenberg 2016).…”

Section: Introductionmentioning

confidence: 99%

Differential drivers of chemical defenses in three widespread pine species along a 1500-m elevational gradient: a test of the elevational gradient in plant defense hypothesis

Ferrenberg

Langenhan

Loskot

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

Divergent growth‐differentiation balance strategies and resource competition shape mortality patterns in ponderosa pine

et al. 2023

Self Cite

View full text Add to dashboard Cite

Dynamic resource availability leads to trade‐offs among functions in plants. The growth‐differentiation balance hypothesis (GDBH) predicts greater allocation of carbon to defense than growth when resources are scarce, with optimum defense production occurring at a point between the minimum and maximum growth rates. While the GDBH has been widely tested, consideration of phenotypic variation in rates for which defense is traded for growth and what this variation means for plant resistance remains rare. For defense, pines produce and store oleoresin in “resin ducts.” Retrospective comparisons of resin ducts in pines have revealed that trees with greater numbers, sizes, or areas of xylem resin ducts are more likely to avoid or survive insect attack. We used tree ring chronologies to quantify phenotypic variation in growth and resin duct defenses in pairs of living and bark beetle‐killed Pinus ponderosa trees in southern New Mexico, USA, and to test the utility of the GDBH for explaining tree mortality. We also assessed the sensitivity of annual growth to climate and competitor density in years preceding mortality in each pair. Survivors had greater growth rates and total cross‐sectional areas of resin ducts than trees killed by bark beetles. We did not observe a difference in climate–growth relationships among the groups; however, trees killed by bark beetles suffered negative effects of competition while survivors did not. Growth‐defense trade‐offs conformed to the GDBH's prediction of a quadratic relationship; however, the two groups significantly differed in the rate at which defense was traded for increasing levels of annual growth. Our results demonstrate that phenotypic variation in the trade‐off between growth and defense could be used to characterize trees that were killed by or survived recent natural enemy epidemics. We hypothesize that the GDBH could be integrated with the characterization of phenotypic variation in growth‐differentiation strategies—along with parsing of gene versus environment influences on phenotypes—at both local and landscape scales to increase our understanding of patterns of natural enemy impacts in plant populations.

show abstract

Landscape Features and Processes Influencing Forest Pest Dynamics

Cited by 18 publications

References 109 publications

Resin monoterpene defenses decline within three widespread species of pine (Pinus) along a 1530‐m elevational gradient

Resin monoterpene defenses decline within three widespread species of pine (Pinus) along a 1530‐m elevational gradient

Differential drivers of chemical defenses in three widespread pine species along a 1500-m elevational gradient: a test of the elevational gradient in plant defense hypothesis

Divergent growth‐differentiation balance strategies and resource competition shape mortality patterns in ponderosa pine

Contact Info

Product

Resources

About