A centennial record of anthropogenic impacts and extreme weather events in southwestern Taiwan: Evidence from sedimentary molecular markers in coastal margin

MARINE POLLUTION BULLETIN

卷:86

Article

Kuo, Li-Jung¹  Lee, Chon-Lin^2,3  Louchouarn, Patrick^4,5  Huh, Chih-An⁶  Liu, James T.⁷  Chen, Jian-Cheng²  Lee, Kun-Je² 

[1] Pacific NW Natl Lab, Marine Sci Lab, Sequim, WA 98382 USA

[2] Natl Sun Yat Sen Univ, Dept Marine Environm & Engn, Kaohsiung 80424, Taiwan

[3] Natl Sun Yat Sen Univ, Asia Pacific Ocean Res Ctr, Kuroshio Res Grp, Kaohsiung 80424, Taiwan

[4] Texas A&M Univ Galveston, Dept Marine Sci, Galveston, TX 77554 USA

[5] Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA

[6] Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan

[7] Natl Sun Yat Sen Univ, Dept Oceanog, Kaohsiung 80424, Taiwan

关键词: Polycyclic aromatic hydrocarbons;    Lignin;    Anthropogenic impacts;    Extreme weather;    Mountainous rivers;    Turbidite;   

DOI  :  10.1016/j.marpolbul.2014.07.010

来源: Elsevier

【 摘 要 】

A 100-year history of human and natural disturbances in southwestern Taiwan was reconstructed using a suite of molecular markers in four dated sediment cores from the upper slope region off the Gaoping River mouth. Trends in polycyclic aromatic hydrocarbons (PAHs) tracked Taiwan's industrialization/urbanization starting in the 19705, and the enactment of environmental regulatory policies thereafter. The predominant pyrogenic sources include vehicular, smelter, and coal combustion but spatial differences are observed among sub-regions of the shelf. Profiles of lignin oxidation products (LOPs) point to a significant increase in terrestrial organic matter inputs driven by land development after the 1970s. Low lignin diagenetic signature ratios [(Ad/Al)(v)] in all sediments suggest quick transport of fresh plant material from land to sea via mountainous rivers. Shifts in PAHs, LOPs, and radionuclides in recent sediments reveal the deposition of turbidites resulting from typhoon-induced floods. Multiproxy analysis illustrates the interplay between anthropogenic activities and natural processes. (C) 2014 Elsevier Ltd. All rights reserved.

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