文章基本信息

标题：Migratory behavior of free-living marine nematodes surrounded by sediments experimentally contaminated by mixtures of polycyclic aromatic hydrocarbons
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作者：Mohamed Allouche ; Ahmed Nasri ; Abdel Halim Harrath 等
期刊名称：Journal of King Saud University - Science
印刷版ISSN：1018-3647
出版年度：2020
卷号：32
期号：2
页码：1339-1345
DOI：10.1016/j.jksus.2019.11.025
语种：English
出版社：Elsevier
摘要：AbstractAn experiment was conducted using microcosms with connected sedimentary compartments to assess the effects of three polycyclic aromatic hydrocarbons (PAHs) on free-living marine nematodes from Bizerte Bay (northeastern Tunisia). Over 30 days, the nematofauna were exposed to four treatment sediments, including one with chrysene (150 ppb), chrysene (150 ppb) plus fluoranthene (75 ppb), chrysene (150 ppb) and phenanthrene (15 ppb), and an uncontaminated reference. Numerical and qualitative community simplifications occurred in contaminated sediments relative to the reference. The diversity of nematodes differed based on hydrocarbon combinations. Multivariate analyses revealed communities in contaminated compartments differed from those in the initial natural sediment and reference. Differences in sensitivities of nematodes to hydrocarbons and in migratory abilities occurred.Rhabditissp.,Calamicrolaimus honestus, andOncholaimus campylocercoideswere in all compartments and classified as tolerant to PAHs. Nematodes observed only in control compartments, includingParasphaerolaimus paradoxus, Encheliidae (sp.),Trichotheristus mirabilis, andTheristus pertenuiswere considered sensitive.
关键词：Microcosm;Free-living marine nematodes;Polycyclic aromatic hydrocarbons;Migration;Abundance;Species diversity