Ungulate herbivory of regenerating conifers in relation to foliar nutrition and terpenoid production

Burney, Owen T.; Jacobs, Douglass F.

doi:10.1016/j.foreco.2011.07.035

Cited by 37 publications

(22 citation statements)

References 37 publications

(51 reference statements)

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“…These oxygenated monoterpenes have been shown by Schwartz et al (1980) to inhibit microbial fermentation within ungulate rumen and, thus, act as a deterrent to ungulate browse (Vourc'h et al 2002). This link was evident in a field study conducted by Burney and Jacobs (2011) in which western red-cedar seedlings with higher concentrations of a-, b-thujone had a significantly lower likelihood of ungulate browse. This study also showed that increasing fertilizer rates resulted in a significant increase of foliar a-, b-thujone concentrations in western red-cedar.…”

Section: Discussionmentioning

confidence: 94%

“…For example, western red-cedar (Thuja plicata Donn ex D. Don) produces a-, b-thujone, an oxygenated monoterpene known to inhibit microbial fermentation within ungulate rumen (Welch and McArthur 1981). Allocation of resources toward the production of defensive compounds such as a-, b-thujone may be of critical importance to deter ungulate browse and possibly at the expense of overall plant growth under certain circumstances (Burney and Jacobs 2011;Burney et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Field fertilization may cause altered plant allocation of resources toward growth and/or biosynthesis of terpenes within specific species (Burney and Jacobs 2011). Fertilizer technology has advanced considerably in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, controlled-release fertilizer applied at planting has promoted early growth and development of Douglas-fir and western hemlock across a variety of sites in the Pacific Northwest, USA, with varying ungulate pressures (Carlson 1981;Carlson and Preisig 1981;Rose and Ketchum 2002;Haase et al 2006). Although fertilization has been suggested to increase susceptibility of forest regeneration to ungulate browse (Laine and Mannerkoski 1980;Crouch and Radwan 1981;Anderson 1983;Månsson et al 2009), Burney and Jacobs (2011) is the only known study to have critically examined the influence of supplemental nutrition on the interactive responses of conifer browse susceptibility and terpene production.…”

Section: Introductionmentioning

confidence: 99%

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Terpene production and growth of three Pacific Northwest conifers in response to simulated browse and nutrient availability

Burney

Jacobs

2012

Trees

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Natural variation in ungulate browsing behavior interferes with the understanding of plant morphological and biochemical responses to herbivory. To investigate mechanisms for recovery from herbivory, we examined growth patterns and biosynthesis of terpenoids under simulated browse (three clipping intensities) and supplemental mineral nutrition (four levels of controlled-release fertilization) for Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco], western hemlock (Tsuga heterophylla Raf. Sarg.), and western red-cedar (Thuja plicata Donn ex D. Don) seedlings on a reforestation site in Northwestern Oregon, USA, that was fenced to exclude ungulates. Higher clipping intensities increased relative height growth (at cost of diameter growth) for all the species. Only western red-cedar showed a decline in monoterpene concentrations with increasing clipping severity, suggesting prioritization in biosynthesis of terpenoids for this species. Douglas-fir and western hemlock responded to fertilization mostly through increased growth. Western red-cedar growth responses to fertilization were less pronounced, but monoterpene concentrations were 2-3 times higher compared to non-fertilized trees. Douglas-fir and western hemlock browse recovery and responses to fertilization consisted primarily of increased growth, while western red-cedar balanced growth promotion with production of chemical defense compounds. Our data suggests the evolution of speciesdependent resource allocation strategies in response to both browse and soil nutrient availability.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Terpene production and growth of three Pacific Northwest conifers in response to simulated browse and nutrient availability

Burney

Jacobs

2012

Trees

Self Cite

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“…Biotic and abiotic factors and stressors (e.g., light intensity/wavelength, soil moisture/nutrients, herbivory/mechanical damage, etc.) can alter chemical profiles and concentrations of secondary compounds (Gershenzon and Croteau, 1991;Tingey et al, 1991;Kainulainen et al, 1992;Litvak and Monson, 1998;Thines et al, 2007;Burney and Jacobs, 2011). Plant age, growth stage, and phenology of a given species (Cedarleaf et al, 1983;Sinclair et al, 1988;Bryant et al, 1991;Vourc'h et al, 2002;Fredrickson et al, 2007) are also important drivers of plant chemistry.…”

Section: Introductionmentioning

confidence: 99%

Within-plant distribution of volatile compounds on the leaf surface of Flourensia cernua

Estell¹,

James²,

Fredrickson³

et al. 2013

Biochemical Systematics and Ecology

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Bringing genomics to the field: An integrative approach to seed sourcing for forest restoration

Prakash,

Capblancq,

Shallows

et al. 2024

Appl Plant Sci

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PremiseGlobal anthropogenic change threatens the health and productivity of forest ecosystems. Assisted migration and reforestation are tools to help mitigate these impacts. However, questions remain about how to approach sourcing seeds to ensure high establishment and future adaptability.MethodsUsing exome‐capture sequencing, we demonstrate a computational approach to finding the best n‐sets from a candidate list of seed sources that collectively achieve high genetic diversity (GD) and minimal genetic load (GL), while also increasing evolvability in quantitative traits. The benefits of this three‐part strategy (diversity‐load‐evolvability) are to increase near‐term establishment success while also boosting evolutionary potential to respond to future stressors. Members of The Nature Conservancy and the Central Appalachian Spruce Restoration Initiative planted 58,000 seedlings across 255 acres. A subset of seedlings was monitored for establishment success and variation in growth.ResultsThe results show gains in GD relative to GL and increases in quantitative genetic variation in seedling growth for pooled vs. single‐source restoration. No single “super source” was observed across planting sites; rather, monitoring results demonstrate that pooling of multiple sources helps achieve higher GD:GL and evolvability.DiscussionOur study shows the potential for integrating genomics into local‐scale restoration and the importance of building partnerships between academic researchers and applied conservation managers.

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Ungulate herbivory of regenerating conifers in relation to foliar nutrition and terpenoid production

Cited by 37 publications

References 37 publications

Terpene production and growth of three Pacific Northwest conifers in response to simulated browse and nutrient availability

Terpene production and growth of three Pacific Northwest conifers in response to simulated browse and nutrient availability

Within-plant distribution of volatile compounds on the leaf surface of Flourensia cernua

Bringing genomics to the field: An integrative approach to seed sourcing for forest restoration

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