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首页> 外文期刊>Environmental Science & Technology >Effect of Bark Beetle Infestation on Secondary Organic Aerosol Precursor Emissions
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Effect of Bark Beetle Infestation on Secondary Organic Aerosol Precursor Emissions

机译：树皮甲虫侵染对次生有机气溶胶前体排放的影响

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摘要

Bark beetles are a potentially destructive force in forest ecosystems; however, it is not known how insect attacks affect the atmosphere. The emissions of volatile organic compounds (VOCs) were sampled i.) from bark beetle infested and healthy lodgepole pine (Pinus contorta var. latifolia) trees and ii.) from sites with and without active mountain pine beetle infestation. The emissions from the trunk and the canopy were collected via sorbent traps. After collection, the sorbent traps were extracted with hexane, and the extracts were separated and detected using gas chromatography/mass spectroscopy. Canister samples were also collected and analyzed by a mulUcolumn gas chromatographic system. The samples from bark beetle infested lodgepole pine trees suggest a 5- to 20-fold enhancement in total VOCs emissions. Furthermore, increases in the β-phellandrene emissions correlated with bark beetle infestation. A shift in the type and the quantity of VOC emissions can be used to identify bark beetle infestation but, more importantly, can lead to increases in secondary organic aerosol from these forests as potent SOA precursors are produced.
机译：树皮甲虫是森林生态系统中的潜在破坏力。但是，尚不清楚昆虫的袭击如何影响大气。挥发性有机化合物（VOCs）的排放i。）是从被树皮甲虫侵害和健康的黑松树（Pinus contorta var。latifolia）树木中采集的； ii。）是从有和没有活跃的山松甲虫侵染的地方取样的。树干和树冠的排放物通过吸附剂收集器收集。收集后，用己烷萃取吸附阱，并分离萃取物，并使用气相色谱/质谱进行检测。还收集罐样品，并通过多柱气相色谱系统进行分析。树皮甲虫感染的黑松树的样本表明，总VOC排放增加了5至20倍。此外，β-水芹烯排放量的增加与树皮甲虫的侵染有关。挥发性有机化合物排放量的类型和数量的变化可用于识别树皮甲虫的侵染，但更重要的是，随着产生有效的SOA前体，这些森林中的次级有机气溶胶会增加。

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  • 来源
    《Environmental Science & Technology》 |2012年第11期|p.5696-5703|共8页
  • 作者

    Hardik Amin; P.Tyson Atkins; Rachel S.Russo; Aaron W.Brown; Barkley Sive; A.Gannet Hallar; Kara E.Huff Hartz;

  • 作者单位

    Southern Illinois University Carbondale, Carbondale, Illinois, USA;

    Desert Research Institute, Storm Peak Laboratory, Steamboat Springs, Colrrado, USA;

    Climate Change Research Center, University of New Hampshire, Durham, New Hampshire, USA,Department of Chemistry, Appalachian State University, Boone, North Carolina, USA;

    Southern Illinois University Carbondale, Carbondale, Illinois, USA;

    Department of Chemistry, Appalachian State University, Boone, North Carolina, USA,Environmental Sciences Program, Appalachian State University, Boone, North Carolina, USA;

    Desert Research Institute, Storm Peak Laboratory, Steamboat Springs, Colrrado, USA;

    Southern Illinois University Carbondale, Carbondale, Illinois, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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