Unraveling the interactive effects of climate change and oil contamination on laboratory‐simulated estuarine benthic communities

微观世界 底栖区 环境化学 环境科学 污染 沉积物 污染物 生态系统 河口 污染 作文(语言) 生态学 化学 生物 语言学 哲学 古生物学
作者
Francisco J. R. C. Coelho,Daniel F. R. Cleary,Rui J. M. Rocha,Ricardo Calado,J. M. Castanheira,Sı́lvia M. Rocha,Artur M. S. Silva,Mário M.Q. Simões,Vanessa Oliveira,Ana I. Lillebø,Adelaide Almeida,Ângela Cunha,Isabel Lopes,Rui Ribeiro,Matilde Moreira‐Santos,Catarina R. Marques,Rodrigo Costa,Ruth Pereira,Newton C. M. Gomes
出处
期刊:Global Change Biology [Wiley]
卷期号:21 (5): 1871-1886 被引量:31
标识
DOI:10.1111/gcb.12801
摘要

Abstract There is growing concern that modifications to the global environment such as ocean acidification and increased ultraviolet radiation may interact with anthropogenic pollutants to adversely affect the future marine environment. Despite this, little is known about the nature of the potential risks posed by such interactions. Here, we performed a multifactorial microcosm experiment to assess the impact of ocean acidification, ultraviolet B (UV‐B) radiation and oil hydrocarbon contamination on sediment chemistry, the microbial community (composition and function) and biochemical marker response of selected indicator species. We found that increased ocean acidification and oil contamination in the absence of UV‐B will significantly alter bacterial composition by, among other things, greatly reducing the relative abundance of Desulfobacterales , known to be important oil hydrocarbon degraders. Along with changes in bacterial composition, we identified concomitant shifts in the composition of oil hydrocarbons in the sediment and an increase in oxidative stress effects on our indicator species. Interestingly, our study identifies UV‐B as a critical component in the interaction between these factors, as its presence alleviates harmful effects caused by the combination of reduced pH and oil pollution. The model system used here shows that the interactive effect of reduced pH and oil contamination can adversely affect the structure and functioning of sediment benthic communities, with the potential to exacerbate the toxicity of oil hydrocarbons in marine ecosystems.

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