Temporal patterns and potential sources of polycyclic aromatic hydrocarbons in xylem of Pinus kwangtungensis

Developmental Biology

Da–zhi Wen²  Jiong Li²  Yue Li¹  Yuan–wen Kuang² 

[1] Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P. R. China$$Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China$$;Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P. R. China$$

关键词: Pinus kwangtungensis;    polycyclic aromatic hydrocarbons;    source analysis;    temporal pattern;    xylem;   

DOI  :  10.5094/APR.2014.061

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

The temporal patterns and the possible sources of polycyclic aromatic hydrocarbons (PAHs) in the xylem formed from 1883 to 2007 of Kwangtung pine (Pinus kwangtungensis), growing in the Nanling Mountains of Southern China, were detected whether dendrochemistry was sufficient to monitor historical changes in regional airborne PAHs. The total concentrations of 17 PAHs (ΣPAHs) distributed in the xylem of P. kwangtungensis did not progressively increase over time. Temporal patterns of high molecular weight PAHs (HMW–PAHs) coincided to a certain extent with the historical–socioeconomic changes in China. Based on the compositional analysis, PAHs absorbed by and accumulated in the xylem of P. kwangtungensis in the Nanling Mountains might be of pyrogenic origin. Although the possible sources of xylem PAHs were diverse over the studied period, principal component analysis could not convincingly distinguish the main contributors to xylem PAHs. Using only xylem of P. kwangtungensis was not adequate for retrospective monitoring of airborne PAHs in the atmosphere of the Nanling Mountains. Sampling other trees along a gradient and combining other meteorological and socioeconomic index data might provide more reliable information on historical changes in regional airborne PAHs.

【 授权许可】

Unknown   

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