Seasonal and Elevational Variability in Dwarf Birch VOC Emissions in Greenlandic Tundra
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Seasonal and Elevational Variability in Dwarf Birch VOC Emissions in Greenlandic Tundra. / Rieksta, Jolanta; Li, Tao; Davie-Martin, Cleo L.; Simin, Tihomir; Brogaard Aeppli, Laurids Christian; Høye, Toke Thomas; Rasmussen, Morten Arendt; Rinnan, Riikka.
I: Journal of Geophysical Research: Biogeosciences, Bind 128, Nr. 11, e2023JG007475, 2023.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Seasonal and Elevational Variability in Dwarf Birch VOC Emissions in Greenlandic Tundra
AU - Rieksta, Jolanta
AU - Li, Tao
AU - Davie-Martin, Cleo L.
AU - Simin, Tihomir
AU - Brogaard Aeppli, Laurids Christian
AU - Høye, Toke Thomas
AU - Rasmussen, Morten Arendt
AU - Rinnan, Riikka
N1 - Publisher Copyright: © 2023. The Authors.
PY - 2023
Y1 - 2023
N2 - Rising temperatures amplify biogenic volatile organic compound (VOC) emissions from Arctic vegetation, causing feedbacks to the climate system. Changes in climate also alter plant physiology and vegetation composition, all of which can influence VOC emissions. Moreover, leaf development and biotic stresses cause highly variable emissions during the growing season. Therefore, linking VOC emissions with plant traits and tracking responses to climate change might provide better understanding of VOC emission regulation under future conditions. We measured VOC emissions and other plant traits in dwarf birch (Betula glandulosa) at two elevations in Narsarsuaq, South Greenland. The measurements were performed in warming experiments that have run since 2016. We collected VOCs using the branch enclosure method from early June until late July 2019 (n = 200). Emissions of green leaf volatiles (GLVs), oxygenated monoterpenes (oMTs), and homoterpenes followed a seasonal trend. VOC emission rates and the diversity of the VOC blend decreased at the end of the measurement period. Differences in VOC emission rates between elevations were pronounced early in the season. Majority of the traits did not explain the variation in VOC emissions. We show strong seasonal variability in VOC emissions within the growing season, which is likely driven by leaf phenology. While the diversity of VOCs was greater at the milder low-elevation site, VOC emission rates were higher or similar at the harsher high-elevation site, showing stronger VOC emission potentials than previously assumed. Seasonal variations in the emissions of VOCs are crucial for accurate predictions of current and future VOC emissions from arctic ecosystems.
AB - Rising temperatures amplify biogenic volatile organic compound (VOC) emissions from Arctic vegetation, causing feedbacks to the climate system. Changes in climate also alter plant physiology and vegetation composition, all of which can influence VOC emissions. Moreover, leaf development and biotic stresses cause highly variable emissions during the growing season. Therefore, linking VOC emissions with plant traits and tracking responses to climate change might provide better understanding of VOC emission regulation under future conditions. We measured VOC emissions and other plant traits in dwarf birch (Betula glandulosa) at two elevations in Narsarsuaq, South Greenland. The measurements were performed in warming experiments that have run since 2016. We collected VOCs using the branch enclosure method from early June until late July 2019 (n = 200). Emissions of green leaf volatiles (GLVs), oxygenated monoterpenes (oMTs), and homoterpenes followed a seasonal trend. VOC emission rates and the diversity of the VOC blend decreased at the end of the measurement period. Differences in VOC emission rates between elevations were pronounced early in the season. Majority of the traits did not explain the variation in VOC emissions. We show strong seasonal variability in VOC emissions within the growing season, which is likely driven by leaf phenology. While the diversity of VOCs was greater at the milder low-elevation site, VOC emission rates were higher or similar at the harsher high-elevation site, showing stronger VOC emission potentials than previously assumed. Seasonal variations in the emissions of VOCs are crucial for accurate predictions of current and future VOC emissions from arctic ecosystems.
KW - climate change
KW - dwarf birch
KW - plant traits
KW - seasonal variation
KW - tundra
KW - volatile organic compounds
U2 - 10.1029/2023JG007475
DO - 10.1029/2023JG007475
M3 - Journal article
AN - SCOPUS:85175873052
VL - 128
JO - Journal of Geophysical Research: Solid Earth
JF - Journal of Geophysical Research: Solid Earth
SN - 0148-0227
IS - 11
M1 - e2023JG007475
ER -
ID: 372810190