Researchers analyzed the combined effects of photooxidation and biodegradation on sand patties associated with the Deepwater Horizon incident. The scientists found that irradiation contributed to increased concentrations of dissolved organic carbon, which leached from sand patties penetrated by seawater.
A Louisiana State University researcher conducted laboratory experiments to learn how estuarine fish behave around sediments containing varying concentrations of weathered and fresh oil. He observed that fish exhibited a stronger avoidance response to medium and high concentrations of fresh oil compared to low concentrations and observed no significant avoidance of any weathered oil concentrations.
Scientists conducted passive acoustic monitoring (PAM) of whales in the northern Gulf of Mexico using two autonomous surface vehicles (ASVs) capable of recording marine mammal sounds.
An interdisciplinary panel of 23 experts in oceanography, ecology, physics, and geospatial-mapping combined their knowledge of pelagic faunal distribution patterns to create a biogeographic map of the world’s deep oceans. The panel identified 33 distinct mesopelagic (200-1000 meters depth) ecoregions that reflect regional variation of biodiversity and function.
Scientists used data collected during the Deepwater Horizon spill to validate a model simulation of the physical and chemical behavior of oil and gas rising from the wellhead to the ocean surface.
Scientists analyzed model simulations of tracer dispersion in a Gulf of Mexico eddy to find out if small-scale flows surrounding the eddy influenced where the tracer went.
Researchers conducted laboratory experiments to assess the lethal and sublethal impacts of weathered and non-weathered crude oil exposure on red drum larvae. The scientists observed a 70% reduction in cardiac output in oil-exposed larvae, even at low oil concentrations.
Scientists conducted laboratory experiments with a simulated oil plume to assess how chemical dispersants affect a crude oil jet as it transitions into a plume under crossflow conditions.
Researchers combined laboratory experiments and molecular simulations to examine how two Corexit surfactants – DOSS (dioctyl sulfosuccinate) and Span 80 – individually affect oil aerosolization.
Researchers analyzed bacterial communities exposed to Deepwater Horizon oil and identified taxa and genes associated with oil degradation and assimilation. The scientists found that Marinobacter and Alcanivorax dominated alkane-degrading communities, while Alteromonadales, Oceanospirillales, and Rhodospirillales dominated polycyclic aromatic hydrocarbon (PAH)-degrading communities.