Herbivore-induced monoterpene emissions from coniferous forests

Potential impact on local tropospheric chemistry

Marcy E. Litvak, Sasha Madronich, Russell Monson

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Herbivory results in an immediate increase in the rate of monoterpene emission from conifer tissues to the atmosphere. The current study uses simulated herbivory and a zero-dimensional photochemistry model with detailed treatment of monoterpene photooxidation to explore the potential impact of these herbivore-induced monoterpene emissions on local tropospheric chemistry dynamics. Measured monoterpene emission rates from undamaged current-year and year-old needles and wounded current-year needles of ponderosa pine and Douglas-fir trees were used to calculate whole-canopy fluxes expected from both a ponderosa pine and a Douglas-fir forest with 0%, 10%, and 25% damage to current-year needles. Fluxes from ponderosa pine forests with 10%- and 25%-damaged foliage are potentially 2- and 3.6-fold higher, respectively, than fluxes from forests with no herbivory. Douglas-fir forests experiencing 10% and 25% foliar damage can emit 1.6 and 2.5 times higher fluxes, respectively, than forests with no damaged foliage. The model simulations suggest that the fluxes resulting from even low-level herbivore damage (10% foliar damage) are large enough to increase local tropospheric production of ozone and organic nitrates and to suppress hydroxyl radical (OH) concentrations. In both Douglas-fir and ponderosa pine forests, the predicted magnitude of the perturbations to each of these chemical species increases linearly with the extent of foliar damage and is critically dependent on local mixing ratios of nitrogen oxides (NO(x)). Ozone production is most sensitive to herbivore-induced emissions at NOx concentrations between 0.3 and 7 nmol/mol. The presence of isoprene in coniferous-forest air diminishes the role herbivory plays in generating local ozone production. The results suggest that defoliation events should be considered to represent an important potential control over local oxidative tropospheric chemistry and to play an important role in perturbing local ozone dynamics in many rural coniferous forests throughout the United States.

Original languageEnglish (US)
Pages (from-to)1147-1159
Number of pages13
JournalEcological Applications
Volume9
Issue number4
StatePublished - Nov 1999
Externally publishedYes

Fingerprint

monoterpene
coniferous forest
herbivore
herbivory
damage
ozone
foliage
isoprene
photooxidation
photochemistry
defoliation
hydroxyl radical
nitrogen oxides
mixing ratio
coniferous tree
perturbation
canopy
nitrate
fold
atmosphere

Keywords

  • Biogenic hydrocarbons
  • Coniferous forests
  • Douglas-fir
  • Herbivory
  • Herbivory in coniferous forests
  • Hydrocarbons
  • Monoterpene emissions
  • Non-methane
  • Oxidative capacity of the troposphere
  • Photochemical model
  • Ponderosa pine
  • Simulated
  • Tropospheric ozone production

ASJC Scopus subject areas

  • Ecology

Cite this

Herbivore-induced monoterpene emissions from coniferous forests : Potential impact on local tropospheric chemistry. / Litvak, Marcy E.; Madronich, Sasha; Monson, Russell.

In: Ecological Applications, Vol. 9, No. 4, 11.1999, p. 1147-1159.

Research output: Contribution to journalArticle

@article{dd1041207c5542469d88b89590e4d713,
title = "Herbivore-induced monoterpene emissions from coniferous forests: Potential impact on local tropospheric chemistry",
abstract = "Herbivory results in an immediate increase in the rate of monoterpene emission from conifer tissues to the atmosphere. The current study uses simulated herbivory and a zero-dimensional photochemistry model with detailed treatment of monoterpene photooxidation to explore the potential impact of these herbivore-induced monoterpene emissions on local tropospheric chemistry dynamics. Measured monoterpene emission rates from undamaged current-year and year-old needles and wounded current-year needles of ponderosa pine and Douglas-fir trees were used to calculate whole-canopy fluxes expected from both a ponderosa pine and a Douglas-fir forest with 0{\%}, 10{\%}, and 25{\%} damage to current-year needles. Fluxes from ponderosa pine forests with 10{\%}- and 25{\%}-damaged foliage are potentially 2- and 3.6-fold higher, respectively, than fluxes from forests with no herbivory. Douglas-fir forests experiencing 10{\%} and 25{\%} foliar damage can emit 1.6 and 2.5 times higher fluxes, respectively, than forests with no damaged foliage. The model simulations suggest that the fluxes resulting from even low-level herbivore damage (10{\%} foliar damage) are large enough to increase local tropospheric production of ozone and organic nitrates and to suppress hydroxyl radical (OH) concentrations. In both Douglas-fir and ponderosa pine forests, the predicted magnitude of the perturbations to each of these chemical species increases linearly with the extent of foliar damage and is critically dependent on local mixing ratios of nitrogen oxides (NO(x)). Ozone production is most sensitive to herbivore-induced emissions at NOx concentrations between 0.3 and 7 nmol/mol. The presence of isoprene in coniferous-forest air diminishes the role herbivory plays in generating local ozone production. The results suggest that defoliation events should be considered to represent an important potential control over local oxidative tropospheric chemistry and to play an important role in perturbing local ozone dynamics in many rural coniferous forests throughout the United States.",
keywords = "Biogenic hydrocarbons, Coniferous forests, Douglas-fir, Herbivory, Herbivory in coniferous forests, Hydrocarbons, Monoterpene emissions, Non-methane, Oxidative capacity of the troposphere, Photochemical model, Ponderosa pine, Simulated, Tropospheric ozone production",
author = "Litvak, {Marcy E.} and Sasha Madronich and Russell Monson",
year = "1999",
month = "11",
language = "English (US)",
volume = "9",
pages = "1147--1159",
journal = "Ecological Appplications",
issn = "1051-0761",
publisher = "Ecological Society of America",
number = "4",

}

TY - JOUR

T1 - Herbivore-induced monoterpene emissions from coniferous forests

T2 - Potential impact on local tropospheric chemistry

AU - Litvak, Marcy E.

AU - Madronich, Sasha

AU - Monson, Russell

PY - 1999/11

Y1 - 1999/11

N2 - Herbivory results in an immediate increase in the rate of monoterpene emission from conifer tissues to the atmosphere. The current study uses simulated herbivory and a zero-dimensional photochemistry model with detailed treatment of monoterpene photooxidation to explore the potential impact of these herbivore-induced monoterpene emissions on local tropospheric chemistry dynamics. Measured monoterpene emission rates from undamaged current-year and year-old needles and wounded current-year needles of ponderosa pine and Douglas-fir trees were used to calculate whole-canopy fluxes expected from both a ponderosa pine and a Douglas-fir forest with 0%, 10%, and 25% damage to current-year needles. Fluxes from ponderosa pine forests with 10%- and 25%-damaged foliage are potentially 2- and 3.6-fold higher, respectively, than fluxes from forests with no herbivory. Douglas-fir forests experiencing 10% and 25% foliar damage can emit 1.6 and 2.5 times higher fluxes, respectively, than forests with no damaged foliage. The model simulations suggest that the fluxes resulting from even low-level herbivore damage (10% foliar damage) are large enough to increase local tropospheric production of ozone and organic nitrates and to suppress hydroxyl radical (OH) concentrations. In both Douglas-fir and ponderosa pine forests, the predicted magnitude of the perturbations to each of these chemical species increases linearly with the extent of foliar damage and is critically dependent on local mixing ratios of nitrogen oxides (NO(x)). Ozone production is most sensitive to herbivore-induced emissions at NOx concentrations between 0.3 and 7 nmol/mol. The presence of isoprene in coniferous-forest air diminishes the role herbivory plays in generating local ozone production. The results suggest that defoliation events should be considered to represent an important potential control over local oxidative tropospheric chemistry and to play an important role in perturbing local ozone dynamics in many rural coniferous forests throughout the United States.

AB - Herbivory results in an immediate increase in the rate of monoterpene emission from conifer tissues to the atmosphere. The current study uses simulated herbivory and a zero-dimensional photochemistry model with detailed treatment of monoterpene photooxidation to explore the potential impact of these herbivore-induced monoterpene emissions on local tropospheric chemistry dynamics. Measured monoterpene emission rates from undamaged current-year and year-old needles and wounded current-year needles of ponderosa pine and Douglas-fir trees were used to calculate whole-canopy fluxes expected from both a ponderosa pine and a Douglas-fir forest with 0%, 10%, and 25% damage to current-year needles. Fluxes from ponderosa pine forests with 10%- and 25%-damaged foliage are potentially 2- and 3.6-fold higher, respectively, than fluxes from forests with no herbivory. Douglas-fir forests experiencing 10% and 25% foliar damage can emit 1.6 and 2.5 times higher fluxes, respectively, than forests with no damaged foliage. The model simulations suggest that the fluxes resulting from even low-level herbivore damage (10% foliar damage) are large enough to increase local tropospheric production of ozone and organic nitrates and to suppress hydroxyl radical (OH) concentrations. In both Douglas-fir and ponderosa pine forests, the predicted magnitude of the perturbations to each of these chemical species increases linearly with the extent of foliar damage and is critically dependent on local mixing ratios of nitrogen oxides (NO(x)). Ozone production is most sensitive to herbivore-induced emissions at NOx concentrations between 0.3 and 7 nmol/mol. The presence of isoprene in coniferous-forest air diminishes the role herbivory plays in generating local ozone production. The results suggest that defoliation events should be considered to represent an important potential control over local oxidative tropospheric chemistry and to play an important role in perturbing local ozone dynamics in many rural coniferous forests throughout the United States.

KW - Biogenic hydrocarbons

KW - Coniferous forests

KW - Douglas-fir

KW - Herbivory

KW - Herbivory in coniferous forests

KW - Hydrocarbons

KW - Monoterpene emissions

KW - Non-methane

KW - Oxidative capacity of the troposphere

KW - Photochemical model

KW - Ponderosa pine

KW - Simulated

KW - Tropospheric ozone production

UR - http://www.scopus.com/inward/record.url?scp=0032697930&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032697930&partnerID=8YFLogxK

M3 - Article

VL - 9

SP - 1147

EP - 1159

JO - Ecological Appplications

JF - Ecological Appplications

SN - 1051-0761

IS - 4

ER -