Volatile organic compound emission in tundra shrubs – Dependence on species characteristics and the near-surface environment

Simin, Tihomir; Tang, Jing; Holst, Thomas; Rinnan, Riikka

doi:10.1016/j.envexpbot.2021.104387

Cited by 20 publications

(22 citation statements)

References 86 publications

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“…The isoprene emission increased exponentially with temperature but it is hard to state if the optimum temperature was reached in our study. In a subarctic Salix myrsinites, isoprene emission increased exponentially across the temperature range of 10-38 • C without reaching a maximum [71]. According to Niinemets et al [72], the optimum often occurs around 40 • C, suggesting that this could be the same for the varieties in this study.…”

Section: Isoprene Emissions Net Assimilation and Water Use Efficiencysupporting

confidence: 59%

Leaf-Scale Study of Biogenic Volatile Organic Compound Emissions from Willow (Salix spp.) Short Rotation Coppices Covering Two Growing Seasons

et al. 2021

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In Europe, willow (Salix spp.) trees have been used commercially since the 1980s at a large scale to produce renewable energy. While reducing fossil fuel needs, growing short rotation coppices (SRCs), such as poplar or willow, may have a high impact on local air quality as these species are known to produce high amounts of isoprene, which can lead to the production of tropospheric ozone (O3). Here, we present a long-term leaf-scale study of biogenic volatile organic compound (BVOC) emissions from a Swedish managed willow site with the aim of providing information on the seasonal variability in BVOC emissions during two growing seasons, 2015–2016. Total BVOC emissions during these two seasons were dominated by isoprene (>96% by mass) and the monoterpene (MT) ocimene. The average standardized (STD, temperature of 30 °C and photosynthetically active radiation of 1000 µmol m−2 s−1) emission rate for isoprene was 45.2 (±42.9, standard deviation (SD)) μg gdw−1 h−1. Isoprene varied through the season, mainly depending on the prevailing temperature and light, where the measured emissions peaked in July 2015 and August 2016. The average STD emission for MTs was 0.301 (±0.201) μg gdw−1 h−1 and the MT emissions decreased from spring to autumn. The average STD emission for sesquiterpenes (SQTs) was 0.103 (±0.249) μg gdw−1 h−1, where caryophyllene was the most abundant SQT. The measured emissions of SQTs peaked in August both in 2015 and 2016. Non-terpenoid compounds were grouped as other VOCs (0.751 ± 0.159 μg gdw−1 h−1), containing alkanes, aldehydes, ketones, and other compounds. Emissions from all the BVOC groups decreased towards the end of the growing season. The more sun-adapted leaves in the upper part of the plantation canopy emitted higher rates of isoprene, MTs, and SQTs compared with more shade-adapted leaves in the lower canopy. On the other hand, emissions of other VOCs were lower from the upper part of the canopy compared with the lower part. Light response curves showed that ocimene and α-farnesene increased with light but only for the sun-adapted leaves, since the shade-adapted leaves did not emit ocimene and α-farnesene. An infestation with Melampsora spp. likely induced high emissions of, e.g., hexanal and nonanal in August 2015. The results from this study imply that upscaling BVOC emissions with model approaches should account for seasonality and also include the canopy position of leaves as a parameter to allow for better estimates for the regional and global budgets of ecosystem emissions.

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Section: Isoprene Emissions Net Assimilation and Water Use Efficiencysupporting

confidence: 59%

Leaf-Scale Study of Biogenic Volatile Organic Compound Emissions from Willow (Salix spp.) Short Rotation Coppices Covering Two Growing Seasons

et al. 2021

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“…We ran MEGAN for our tundra sites using the PPFD measured by us in situ. Given the short stature of the tundra vegetation and the great disparity between air and vegetation temperatures found in Arctic ecosystems (16,48,49,54), we forced the model to set the leaf temperature equal to our measured vegetation surface temperature, instead of using leaf temperatures calculated with its leaf energy balance model. In addition, MEGAN's light and temperature activity factors account for the past conditions (using the moving average of the last 24 h and the last 10 d) to model the response to light and temperature.…”

Section: Methodsmentioning

confidence: 99%

Strong isoprene emission response to temperature in tundra vegetation

Seco

Holst

Davie‐Martin

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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Emissions of biogenic volatile organic compounds (BVOCs) are a crucial component of biosphere–atmosphere interactions. In northern latitudes, climate change is amplified by feedback processes in which BVOCs have a recognized, yet poorly quantified role, mainly due to a lack of measurements and concomitant modeling gaps. Hence, current Earth system models mostly rely on temperature responses measured on vegetation from lower latitudes, rendering their predictions highly uncertain. Here, we show how tundra isoprene emissions respond vigorously to temperature increases, compared to model results. Our unique dataset of direct eddy covariance ecosystem-level isoprene measurements in two contrasting ecosystems exhibited Q 10 (the factor by which the emission rate increases with a 10 °C rise in temperature) temperature coefficients of up to 20.8, that is, 3.5 times the Q 10 of 5.9 derived from the equivalent model calculations. Crude estimates using the observed temperature responses indicate that tundra vegetation could enhance their isoprene emissions by up to 41% (87%)—that is, 46% (55%) more than estimated by models—with a 2 °C (4 °C) warming. Our results demonstrate that tundra vegetation possesses the potential to substantially boost its isoprene emissions in response to future rising temperatures, at rates that exceed the current Earth system model predictions.

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“…Now we are pleased to report there has been an upswing in the number of studies on primate olfaction and increasing appreciation of its importance 28,46,47 . These studies have been facilitated in part by improvements in the technology for sampling, storing, and analyzing volatile organic compounds (VOCs) under field conditions 48–50 …”

Section: Overview Of Current Knowledgementioning

confidence: 99%

“…28,46,47 These studies have been facilitated in part by improvements in the technology for sampling, storing, and analyzing volatile organic compounds (VOCs) under field conditions. [48][49][50] For example, Dominy et al reported anecdotal evidence and a personal communication that marmosets scent-mark feeding sites. Recent studies provide direct behavioral evidence of this behavior and report the VOC composition of marmoset scent marks deposited at feeding sites and of dietary exudates.…”

Section: Comparative Sensory Ecologymentioning

confidence: 99%

The sensory ecology of primate food perception, revisited

Veilleux

Dominy

Melin

2022

Evolutionary Anthropology

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Twenty years ago, Dominy and colleagues published “The sensory ecology of primate food perception,” an impactful review that brought new perspectives to understanding primate foraging adaptations. Their review synthesized information on primate senses and explored how senses informed feeding behavior. Research on primate sensory ecology has seen explosive growth in the last two decades. Here, we revisit this important topic, focusing on the numerous new discoveries and lines of innovative research. We begin by reviewing each of the five traditionally recognized senses involved in foraging: audition, olfaction, vision, touch, and taste. For each sense, we provide an overview of sensory function and comparative ecology, comment on the state of knowledge at the time of the original review, and highlight advancements and lingering gaps in knowledge. Next, we provide an outline for creative, multidisciplinary, and innovative future research programs that we anticipate will generate exciting new discoveries in the next two decades.

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Volatile organic compound emission in tundra shrubs – Dependence on species characteristics and the near-surface environment

Cited by 20 publications

References 86 publications

Leaf-Scale Study of Biogenic Volatile Organic Compound Emissions from Willow (Salix spp.) Short Rotation Coppices Covering Two Growing Seasons

Leaf-Scale Study of Biogenic Volatile Organic Compound Emissions from Willow (Salix spp.) Short Rotation Coppices Covering Two Growing Seasons

Strong isoprene emission response to temperature in tundra vegetation

The sensory ecology of primate food perception, revisited

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