Tracking the early signals of crude oil in seawater and plankton after a major oil spill in the Red Sea

Kottuparambil, Sreejith; Ashok, Ananya; Barozzi, Alan; Michoud, Grégoire; Cai, Chunzhi; Daffonchio, D.; Duarte, Carlos M.; Agustı́, Susana

doi:10.1007/s11356-023-27111-0

Cited by 16 publications

(3 citation statements)

References 83 publications

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“…3). Our results are in agreement with other studies showing proliferation of small phytoplankton after an oil spill incident (González et al 2009;Huang et al 2011;Kottuparambil et al 2023). Quigg et al (2021) argued that the dominance of small phytoplankton following an oil spill is related to their higher growth rate than that of large cells.…”

Section: Impact Of Oil On the Growth Of Size-fractioned Phytoplanktonsupporting

confidence: 94%

Field study on natural phytoplankton throughout “Bizerte City” oil spill on the south-western coast of the Mediterranean Sea

Grami,

Chkili,

Garali

et al. 2024

Preprint

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Oil spills are recurrent worldwide. Assessing the response of phytoplankton – the basis of marine food webs – at the early stages of an oil spill and throughout its evolution is crucial to improve our understanding of the impact of oil spills on the marine environment. Field data collected 1, 4, 8 and 18 days after the “Bizerte City” oil spill showed that phytoplankton responded differentially over time. In the short term (1–8 days), picophytoplankton biomass and abundance increased, possibly due to reduced grazing. In contrast, nano- and microphytoplankton biomass decreased, probably owing to inhibited growth of species sensitive to polycyclic aromatic hydrocarbons (PAHs) – the most toxic components of oil. After 18 days, the dispersal of oil and its decreasing negative effect were accompanied by outbreaks of all size fractions. Accordingly, the phytoplankton size structure shifted throughout the oil exposure level from a prevalence of microphytoplankton after a few days toward picophytoplankton dominance. Oil pollution influenced the species composition and significantly decreased diversity indexes. In the first days, nanophytoplankton was dominated by cryptophyceae (mainly Hillea fusiformis and H. marina), while microphytoplankton was mostly represented by the pennate diatoms Pseudo-nitzschia and Nitzschia, suggesting a better resistance of these genera to oil. Algal recovery after 18 days was associated with high proliferation of nano-sized Chaetoceros and micro-sized Astrionellopsis glacialis diatoms. These results improve our knowledge of the impact of oil pollution on coastal phytoplankton communities and reinforce the idea of using them as bio-indicators.

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Section: Impact Of Oil On the Growth Of Size-fractioned Phytoplanktonsupporting

confidence: 94%

Field study on natural phytoplankton throughout “Bizerte City” oil spill on the south-western coast of the Mediterranean Sea

Grami,

Chkili,

Garali

et al. 2024

Preprint

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“…A noteworthy rise in bacteria, such as Alcanivorax sp., capable of alkaline degradation, was observed. The aftermath of brief oil-spills included detrimental effects on various components of the marine ecosystem, due to imbalances in bacterial and picophytoplankton communities [38].…”

Section: Environmental Dnamentioning

confidence: 99%

Emerging Technologies for the Discovery of Novel Diversity in Cyanobacteria and Algae and the Elucidation of Their Valuable Metabolites

Zammit,

Buttigieg

2023

Diversity

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Until recently, the study of cyanobacteria and microalgae has been hampered by the need to cultivate these organisms to gain insight into their cytomorphology, life cycle and molecular biology. However, various microbial species characterized by thick sheaths of exopolymeric substances were difficult to isolate in culture due to their associated symbiotic bacteria. Other microbes evaded culture. Such challenges have now been overcome by the development of metagenomic techniques that allow direct DNA sequencing from environmental samples, as well as high resolution microscopy techniques that permit direct imaging of environmental samples. The sampling of understudied taxa from extreme environments and of toxic species has been facilitated by specialized robotic equipment. Single-cell sequencing has allowed for the proper characterization of microalgal species and their response to environmental changes. Various strains of cyanobacteria, microalgae and macroalgae have gained renewed interest for their high-value metabolites. This paper provides an overview of the emerging technologies and explains how they are being used to identify such strains and their products for industrial application. Advances in genetic engineering and CRISPR technology have facilitated the production of strains that are more amenable to culture, metabolite extraction, scale-up and application in biorefinery approaches. Emerging analytical techniques are discussed, with the advent of multiomics and its application in this field.

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“…Oil is one pollutant of water that is hard to remove and can cause devastating effects to the species living in water. The primary cause of water pollution by oil involve human practices such as petroleum refining [4], petrochemical plant wastes [5], oil runoffs [6], accidental spills [7], and drilling incidents [8].…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl alcohol nanofibrous mat impregnated with ClCNTs/Fe2O3 nanocomposite for absorption of diesel oil in water

Motlokoa,

Ngodwana,

Maboya

2024

Mater. Res. Express

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Oil contamination is one of the main sources of water pollution in the world. In this study, a sorption material that showed great promise as an absorbent for diesel oil in aqueous solution was developed. Chlorinated carbon nanotubes (CNTs) previously synthesized using a chemical vapor deposition (CVD) method were loaded with iron oxide nanoparticles via a co-precipitation method. The sorption materials were prepared by embedding ClCNTs/Fe2O3 nanocomposite into a polyvinyl alcohol (PVA) polymer matrix via electrospinning. The PVA mat containing only ClCNTs was also prepared for comparison and the maximum sorption capacity of 9.7 g g−1 was obtained. The optimum concentration of ClCNTs/Fe2O3 nanocomposite that gave uniform, and well-distributed nanofibers was 0.5 wt%. Crosslinking the PVA/ClCNTs/Fe2O3 nanofiber mat with glutaraldehyde (GA) resulted in increased absorption capacity for oil of ∼ 9.4 g g−1 in comparison with an absorption capacity of ∼ 7.6 g g−1 attained with a pure nanofiber mat. The crosslinked nanofiber mat remained stable even after 60 min of oil absorption which proves that crosslinking assisted in increasing the affinity of PVA for oil by reducing the amount of OH groups through acetal formation making PVA less soluble to water. The oil sorption capacity of the prepared materials was not maintained even after two cycles indicating poor reusability.

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Tracking the early signals of crude oil in seawater and plankton after a major oil spill in the Red Sea

Cited by 16 publications

References 83 publications

Field study on natural phytoplankton throughout “Bizerte City” oil spill on the south-western coast of the Mediterranean Sea

Field study on natural phytoplankton throughout “Bizerte City” oil spill on the south-western coast of the Mediterranean Sea

Emerging Technologies for the Discovery of Novel Diversity in Cyanobacteria and Algae and the Elucidation of Their Valuable Metabolites

Polyvinyl alcohol nanofibrous mat impregnated with ClCNTs/Fe2O3 nanocomposite for absorption of diesel oil in water

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