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Differences in accu...
Differences in accumulation of polycyclic aromatic compounds (PACs) among eleven broadleaved and conifer tree species
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- Pleijel, Håkan, 1958 (author)
- University of Gothenburg,Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Klingberg, Jenny, 1978 (author)
- University of Gothenburg
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- Strandberg, B. (author)
- Lund University,Lunds universitet,Avdelningen för arbets- och miljömedicin,Institutionen för laboratoriemedicin,Medicinska fakulteten,Tillämpad masspektrometri inom miljömedicin,Forskargrupper vid Lunds universitet,LTH profilområde: Aerosoler,LTH profilområden,Lunds Tekniska Högskola,Division of Occupational and Environmental Medicine, Lund University,Department of Laboratory Medicine,Faculty of Medicine,Applied Mass Spectrometry in Environmental Medicine,Lund University Research Groups,LTH Profile Area: Aerosols,LTH Profile areas,Faculty of Engineering, LTH,Region Skåne
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- Sjöman, Henrik (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Landskapsarkitektur, planering och förvaltning,Department of Landscape Architecture, Planning and Management,University of Gothenburg
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- Tarvainen, Lasse, 1977 (author)
- University of Gothenburg,Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Wallin, Göran, 1955 (author)
- University of Gothenburg,Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,University of Oxford
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(creator_code:org_t)
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- Elsevier BV, 2022
- 2022
- English.
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In: Ecological Indicators. - : Elsevier BV. - 1470-160X .- 1872-7034. ; 145
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Abstract
Subject headings
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- PACs (polycylic aromatic compounds) are air pollutants formed in incomplete combustion, e.g., in vehicle engines. Vegetation can potentially remove substantial amounts and act as bioindicators of these pollutants. Increased knowledge of the pollutant removal efficiencies of different tree species is essential for understanding the potential benefits trees can provide urban residents. We investigated the leaf/needle content of the two PAC groups, polycyclic aromatic hydrocarbons (PAHs, 32 compounds) and dibenzothiophenes (DBTs, 6 compounds) in seven broadleaved and four conifer tree species in an arboretum of South-West Sweden. PAHs were grouped into low-molecular (L-PAHs, largely gaseous), medium-molecular (M-PAHs, both gaseous and particle-bound) and high-molecular mass (H-PAHs, largely particle-bound) PAHs. DBTs are organosulphur compounds with two benzene rings. In general, conifer needles were stronger accumulators of PACs than leaves of broadleaved trees. Comparing three-year-old and one-year-old needles showed that evergreen conifers accumulated L-PAHs, M-PAHs, H-PAHs and DBTs over several years. In deciduous trees, L-PAHs and DBTs declined from June to September, M-PAHs had no significant net change, but for H-PAHs, there was a significant net accumulation. Conifers had a similar or lower net average annual accumulation of H-PAHs than broadleaved trees, except the deciduous conifer Larix, which had the highest uptake rate of this toxicologically important PAH category. Our results suggest that L-PAH accumulation depends on leaf/needle mass or volume, while for H-PAHs leaf/needle area is more important. This explains why conifers represented a stronger sink for L-PAHs and M-PAHs. DBT accumulation in leaves/needles was similar to that of L-PAHs. An important conclusion is that tree leaves/needles accumulate substantial amounts of PAC with strong and complex contrasts between tree species and PAC groups. Another implication of our data is that conifer needles are useful as bioindicators for PAC pollution since they accumulate all PAC categories over several years.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- DBTs
- Deciduous tree
- Dibenzothiophenes
- Evergreen tree
- Gaseous
- PAHs
- Particle bound
- Polycyclic aromatic hydrocarbons
- SLA
- Specific leaf area
Publication and Content Type
- ref (subject category)
- art (subject category)
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