Utilizing Eutrophication Assessment Directives From Transitional to Marine Systems in the Thames Estuary and Liverpool Bay, UK

Greenwood, Naomi; Devlin, Michelle; Best, Mike; Fronkova, Lenka; Graves, Carolyn A.; Milligan, Alex. Wm.; Barry, Jon; Leeuwen, Sonja M. van

doi:10.3389/fmars.2019.00116

Cited by 24 publications

(36 citation statements)

References 57 publications

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“…Each 40 mL microcosm (excluding seawater only) contained 20 mL of seawater which was supplemented with nutrients (final concentrations of 300 µM NH 4 Cl and 20 µM K 2 HPO 4 ); this allowed us to control for nutrient limitation and evaluate microbial response to oil/dispersants in the early phase. The sampling site is subjected to large annual inputs of dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorous (DIP) from the river Thames [44] and the nutrient loadings are representative of background nitrogen and phosphorous concentrations recorded at the sampling site at other times [45]. The oil (0.1% v/v final concentration) was a Norwegian Geochemical Standard, North Sea Oil (NSO-1; Norwegian Petroleum Directorate, Stavanger, Norway), that had previously been weathered (distilled at 69 • C, which is the boiling point of hexane and thus removes the most volatile components of crude oil).…”

Section: Microcosm Design and Samplingmentioning

confidence: 99%

“…After only 24 h, there was a clear selection for hydrocarbon-degrading bacteria (HCB) in all treatments where dispersants or biosurfactants had significantly reduced the interfacial surface tension between oil and water, which was coupled with significant reductions in the concentration of alkanes (21-42%). The significantly enhanced rate of alkane biodegradation occurred under high nutrient concentrations (during the first 24 h), including both ammonium and nitrate, typical of eutrophic marine estuarine environments such as the Thames Estuary and Liverpool Bay [44,79], which continually receive riverine ammonium and nitrate. Similar rapid alkane biodegradation may not be observed in environments with significantly lower total N or in nitrate-dominant systems, such as many open water environments.…”

Section: To What Extent Do Different Dispersants and Biosurfactants Enhance The Growth Of Hydrocarbon-degrading Bacteria And Accelerate Hmentioning

confidence: 99%

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Effects of Dispersants and Biosurfactants on Crude-Oil Biodegradation and Bacterial Community Succession

et al. 2021

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This study evaluated the effects of three commercial dispersants (Finasol OSR 52, Slickgone NS, Superdispersant 25) and three biosurfactants (rhamnolipid, trehalolipid, sophorolipid) in crude-oil seawater microcosms. We analysed the crucial early bacterial response (1 and 3 days). In contrast, most analyses miss this key period and instead focus on later time points after oil and dispersant addition. By focusing on the early stage, we show that dispersants and biosurfactants, which reduce the interfacial surface tension of oil and water, significantly increase the abundance of hydrocarbon-degrading bacteria, and the rate of hydrocarbon biodegradation, within 24 h. A succession of obligate hydrocarbonoclastic bacteria (OHCB), driven by metabolite niche partitioning, is demonstrated. Importantly, this succession has revealed how the OHCB Oleispira, hitherto considered to be a psychrophile, can dominate in the early stages of oil-spill response (1 and 3 days), outcompeting all other OHCB, at the relatively high temperature of 16 °C. Additionally, we demonstrate how some dispersants or biosurfactants can select for specific bacterial genera, especially the biosurfactant rhamnolipid, which appears to provide an advantageous compatibility with Pseudomonas, a genus in which some species synthesize rhamnolipid in the presence of hydrocarbons.

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Section: Microcosm Design and Samplingmentioning

confidence: 99%

Section: To What Extent Do Different Dispersants and Biosurfactants Enhance The Growth Of Hydrocarbon-degrading Bacteria And Accelerate Hmentioning

confidence: 99%

Effects of Dispersants and Biosurfactants on Crude-Oil Biodegradation and Bacterial Community Succession

et al. 2021

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“…These groups include species which have the potential for negative impacts on human health and provision of ecosystem services for people as well as other higher trophic levels of the system (Hallegraeff et al, 2021;Wells et al, 2020).…”

Section: Potentially Toxic or Nuisance Diatomsmentioning

confidence: 99%

The Plankton Lifeform Extraction Tool: A digital tool to increase the discoverability and usability of plankton time-series data

Ostle

Paxman

Graves

et al. 2021

Preprint

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Abstract. Plankton form the base of the marine food web and are sensitive indicators of environmental change. Plankton time-series are therefore an essential part of monitoring progress towards global biodiversity goals, such as the Convention on Biological Diversity Aichi Targets, and for informing ecosystem-based policy, such as the EU Marine Strategy Framework Directive. Multiple plankton monitoring programmes exist in Europe, but differences in sampling and analysis methods prevent the integration of their data, constraining their utility over large spatio-temporal scales. The Plankton Lifeform Extraction Tool brings together disparate European plankton datasets into a central database from which it extracts abundance time-series of plankton functional groups, called ‘lifeforms’, according to shared biological traits. This tool has been designed to make complex plankton datasets accessible and meaningful for policy, public interest, and scientificdiscovery. It allows examination of large-scale shifts in lifeform abundance or distribution (for example, holoplankton being partially replaced by meroplankton), providing clues to how the marine environment is changing. The lifeform method enables datasets with different plankton sampling and taxonomic analysis methodologies to be used together to provide insights into the response to multiple stressors and robust policy evidence for decision making. Lifeform time-series generated with the Plankton Lifeform Extraction Tool currently inform plankton and food web indicators for the UK’s Marine Strategy, the EU’s Marine Strategy Framework Directive, and for the Convention for the Protection of the Marine Environment of the North- East Atlantic (OSPAR) biodiversity assessments. The Plankton Lifeform Extraction Tool currently integrates 155,000 samples, containing over 44 million plankton records, from 9 different plankton datasets within UK and European Seas, collected between 1924 and 2017. Additional datasets can be added, and time-series updated. The Plankton Lifeform Extraction Tool is hosted by The Archive for Marine Species and Habitats Data (DASSH) at https://www.dassh.ac.uk/lifeforms/. The lifeform outputs are linked to specific, doi-ed, versions of the Plankton Lifeform Traits Master List and each underlying dataset.

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“…The role of these microbes in organismal function, performance, interaction and ecological context is grossly underappreciated and hence poorly understood; (S7) Assessing cumulative effects to guide management, since such assessments are increasingly used to inform environmental policy and guide ecosystem-based management but are inherently complex and seldom linked to management processes (Stelzenmüller et al, 2018). There is a need for developing best practices for the operationalization of cumulative effects assessments in a management context (Greenwood et al, 2019;Stelzenmüller et al, 2020); and (S8) Investigating emerging pollutants (e.g., plastics and additives, pharmaceuticals), artificial light at night, noise and toxin effects on coastal and marine species, habitats and ecosystems (Chae and An, 2017;Rako-Gospić and Picciulin, 2019), including monitoring and assessment.…”

Section: Secondary Challengesmentioning

confidence: 99%

Past and Future Grand Challenges in Marine Ecosystem Ecology

Borja

Andersen²,

Arvanitidis

et al. 2020

Front. Mar. Sci.

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Utilizing Eutrophication Assessment Directives From Transitional to Marine Systems in the Thames Estuary and Liverpool Bay, UK

Cited by 24 publications

References 57 publications

Effects of Dispersants and Biosurfactants on Crude-Oil Biodegradation and Bacterial Community Succession

Effects of Dispersants and Biosurfactants on Crude-Oil Biodegradation and Bacterial Community Succession

The Plankton Lifeform Extraction Tool: A digital tool to increase the discoverability and usability of plankton time-series data

Past and Future Grand Challenges in Marine Ecosystem Ecology

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