Underestimated PAH accumulation potential of blue carbon vegetation: Evidence from sedimentary records of saltmarsh and mangrove in Yueqing Bay, China

Runqiu Huang, Chunfang Zhang, Xiangrong Xu, Runjie Jin, Dan Li, George Christakos, Xi Xiao, Junyu He, Susana Agusti, Carlos M. Duarte, Jiaping Wu

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Web of Science)

    Abstract

    Sediments of blue carbon vegetation are becoming a sink of natural and anthropogenic pollutants, such as polycyclic aromatic hydrocarbons (PAHs). However, the extent to which PAHs are accumulated and varied in blue carbon sediments, and the impact of blue carbon vegetation on the accumulation and retention capacity of PAHs, have been poorly explored. This study examines the sedimentary records of PAHs in profiles from mangrove plantation, saltmarsh, and mudflat in Ximen Island and Maoyan Island of Yueqing Bay, China. The existence of blue carbon vegetation provides a sheltered environment for the accelerated burial of sediment and OC. Decadal PAH sedimentation records show staged changes characterized by the emission of PAHs and colonization of blue carbon vegetation, reflecting the accelerated burial of PAHs in sediments by blue carbon vegetation colonization. In addition, the colonization of blue carbon vegetation contributes to the shift of PAH compositions in sediments. This study provides new insights into the underestimated PAH accumulation potential and retention capacity of blue carbon vegetation and the corresponding underlying sediments, supporting the environmental benefits of blue carbon vegetation.

    Original languageEnglish
    Article number152887
    Number of pages9
    JournalScience of the Total Environment
    Volume817
    DOIs
    Publication statusPublished - 15 Apr 2022

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