Bioremediation of marine oil spills: when and when not--the Exxon Valdez experience.
Bottom Line: Where SSOR does remain, it is for the most part highly weathered, with 82% of 2007 samples indicating depletion of total polycyclic aromatic hydrocarbon (Total PAH) of >70% relative to EVOS oil.This SSOR is sequestered in patchy deposits under boulder/cobble armour, generally in the mid-to-upper intertidal zone.The relatively high nutrient concentrations measured at these sites, the patchy distribution and the weathering state of the SSOR suggest that it is in a form and location where bioremediation likely would be ineffective at increasing the rate of hydrocarbon removal.
Affiliation: University of Louisville, Louisville, KY 40292, USA. email@example.comShow MeSH
Mentions: Figure 7 shows further breakdown of the extent of Total PAH depletion as a function of tidal elevation [i.e. pit elevation above MLLW (mean low low water tide)]. Most samples with less than 70% Total PAH depletion are located at +2 and +3 m (middle to upper intertidal zone). Very few are located in the lower intertidal zone. This is not unexpected since SSOR at 0 and +1 m is exposed to water for much longer times.
Affiliation: University of Louisville, Louisville, KY 40292, USA. firstname.lastname@example.org