Toxicity of dispersant Corexit 9500A and crude oil to marine microzooplankton

Almeda, Rodrigo; Hyatt, Cammie; Buskey, Edward J.

doi:10.1016/j.ecoenv.2014.04.028

Cited by 134 publications

(72 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Patches of oil and foam from chemical dispersants were evident during that sampling day. Ciliates are more sensitive than other planktonic organisms to hydrocarbons and chemical dispersants (Almeda et al, 2014) and could, therefore, have been negatively affected by those substances.…”

Section: Population Dynamicsmentioning

confidence: 99%

Effects of eutrophication on the planktonic food web dynamics of marine coastal ecosystems: The case study of two tropical inlets

Schmoker¹,

Russo²,

Drillet³

et al. 2016

Marine Environmental Research

View full text Add to dashboard Cite

We studied the plankton dynamics of two semi-enclosed marine coastal inlets of the north of Jurong Island separated by a causeway (SW Singapore; May 2012-April 2013). The west side of the causeway (west station) has residence times of ca. one year and is markedly eutrophic. The east side (east station) has residence times of one month and presents lower nutrient concentrations throughout the year. The higher nutrient concentrations at the west station did not translate into significantly higher concentrations of chlorophyll a, with the exception of some peaks at the end of the South West Monsoon. Microzooplankton were more abundant at the west station. The west station exhibited more variable abundances of copepods during the year than did the east station, which showed a more stable pattern and higher diversity. Despite the higher nutrient concentrations at the west station (never limiting phytoplankton growth), the instantaneous phytoplankton growth rates there were generally lower than at the east station. The phytoplankton communities at the west station were top-down controlled, largely by microzooplankton grazing, whereas those of the east station alternated between top-down and bottom-up control, with mesozooplankton being the major grazers. Overall, the trophic transfer efficiency from nutrients to mesozooplankton in the eutrophic west station was less efficient than in the east station, but this was mostly because a poor use of inorganic nutrients by phytoplankton rather than an inefficient trophic transfer of carbon. Some hypotheses explaining this result are discussed.

show abstract

Section: Population Dynamicsmentioning

confidence: 99%

Effects of eutrophication on the planktonic food web dynamics of marine coastal ecosystems: The case study of two tropical inlets

Schmoker¹,

Russo²,

Drillet³

et al. 2016

Marine Environmental Research

View full text Add to dashboard Cite

show abstract

“…While dispersants are generally assumed to be less toxic than oil (National Research Council, 2005), the increased oil-in-water solubility could make chemically dispersed oil more toxic to aquatic organisms (George-Ares and Clark, 2000;National Research Council, 2005), including algae (Lewis and Pryor, 2013), micro-zooplankton (Almeda et al, 2014) and fish (Ramachandran et al, 2004). Dispersants can also affect microbial degradation of oil-derived hydrocarbons (Lindstrom and Braddock, 2002).…”

Section: Introductionmentioning

confidence: 98%

Biodegradation of crude oil and dispersants in deep seawater from the Gulf of Mexico: Insights from ultra-high resolution mass spectrometry

Seidel

Kleindienst

Dittmar

et al. 2016

Deep Sea Research Part II: Topical Studies in Oceanography

View full text Add to dashboard Cite

“…On average, the CEWAF treatments in the present study had a 27-fold greater tPAH concentration than those of the equivalent WAF dilutions. Other studies also report enhanced tPAH concentrations in dispersed oil treatments (Baklien et al 1986;Couillard et al 2004;Ramachandran et al 2004;Anderson et al 2009;Schein et al 2009;Wu et al 2012;Almeda et al 2014a). This is likely to relate to greater dissolution of PAHs in chemically dispersed oil due to the formation of micro-droplets.…”

Section: Discussionmentioning

confidence: 88%

“…At present, there is little research into the effects of oil and fuel derivatives on native New Zealand marine species. It is clear, however, from studies conducted elsewhere that oil contamination affects a range of marine taxa (Taban et al 2004;Aarab et al 2011;Almeda et al 2014aAlmeda et al , 2014bCohen et al 2014). In addition, the chemical dispersants often used to remove oil from surface waters may increase chemical toxicity in the surrounding media (Couillard et al 2004;Ramachandran et al 2004;Anderson et al 2009Anderson et al , 2014Schein et al 2009;Zhang et al 2013).…”

Section: Introductionmentioning

confidence: 95%

“…From a spill response perspective, this may reduce oil wash up on coastal fringes as well as preventing the smothering of larger marine organisms such as seabirds and mammals. However, many lab studies have shown that the chemically enhanced (dispersed) water-accommodated fraction (CEWAF), resulting from oil dispersion, is associated with increased PAH concentrations (Baklien et al 1986;Couillard et al 2004;Ramachandran et al 2004;Anderson et al 2009Anderson et al , 2014Schein et al 2009;Almeda et al 2014a). The use of dispersant can therefore increase the relative toxicity of the oil to marine organisms exposed to the CEWAF in surface waters.…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Effects of MVRenaheavy fuel oil and dispersed oil on yellowtail kingfish early life stages

Muncaster

Jacobson

Taiarui

et al. 2016

New Zealand Journal of Marine and Freshwater Research

View full text Add to dashboard Cite

The grounding of the MV Rena has highlighted the lack of information concerning the effects of oil-related compounds on New Zealand marine life. Yellowtail kingfish (YTK), Seriola lalandi, embryos were exposed in static incubations to the wateraccommodated fraction (WAF) of Rena heavy fuel oil as well as a similar preparation treated with the commercial dispersant Corexit 9500. Mortality in WAF treatments generally increased in association with total polycyclic aromatic hydrocarbon (tPAH) concentration over a 24-h period. Physical abnormalities were observed in some of the larvae exposed to WAF for 48 h. There was no survival in dispersed oil treatments after 24 h of exposure. These treatments had greater tPAH concentrations (2-53 µgL −1 ) than equivalent WAF dilutions (0.2-1.5 µgL −1 tPAH). Indications are that significant morbidity is induced in YTK at ecologically relevant tPAH concentrations. This highlights the need for further research into oil and dispersant toxicity in New Zealand marine species. ARTICLE HISTORY

show abstract

Toxicity of dispersant Corexit 9500A and crude oil to marine microzooplankton

Cited by 134 publications

References 65 publications

Effects of eutrophication on the planktonic food web dynamics of marine coastal ecosystems: The case study of two tropical inlets

Effects of eutrophication on the planktonic food web dynamics of marine coastal ecosystems: The case study of two tropical inlets

Biodegradation of crude oil and dispersants in deep seawater from the Gulf of Mexico: Insights from ultra-high resolution mass spectrometry

Effects of MVRenaheavy fuel oil and dispersed oil on yellowtail kingfish early life stages

Contact Info

Product

Resources

About