Scots pine provenance affects the emission rate and chemical composition of volatile organic compounds of forest floor

• Main Authors: Kivimäenpää, Minna, Markkanen, Juha-Matti, Ghimire, Rajendra Prasad, Holopainen, Toini, Vuorinen, Martti, Holopainen, Jarmo
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: NRC Research Press (a division of Canadian Science Publishing) 2018
• Subjects: Muonio; Suo
• Online Access: http://hdl.handle.net/1807/90808; http://www.nrcresearchpress.com/doi/abs/10.1139/cjfr-2018-0049

Scots pine (Pinus sylvestris L.) is an important source of biogenic volatile organic compounds (BVOCs) in the boreal zone. BVOC emission rate and profile affect air quality, climate forcing, plant stress tolerance, and thus the growing conditions of forests. BVOC emission profile of shoots and forest floor, and emission rates from forest floor, were studied in a latitudinal provenance experiment with 19-year-old Scots pine common garden in Central Finland. The provenances studied were Saaremaa (SAA 58°22´), Korpilahti (KOR 62°0´), Suomussalmi (SUO 65°10´) and Muonio (MUO 67°56´). A chemotype with high proportion of Δ-3-carene, terpinolene, sabinene, γ-terpinene and α-terpinene was significantly more common for the southern SAA than the northern SUO and MUO provenances. A chemotype with high proportion of α-pinene, β-pinene, limonene and myrcene was more common in the three northernmost provenances. The main compounds emitted by forest floor were α-pinene, Δ-3-carene and camphene. Similarly to shoot emissions, forest floor emissions from SAA had highest proportion of Δ-3-carene. Average total VOC emission rate from forest floor was 50 µg m-2 h-1 at the end of August. Total emission rates were 65 % higher in KOR than in MUO. High emission rates were explained by the high amount of decomposing needle litter and low moss coverage. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author.