A second report by a multiagency team of government and academic scientists, working on five research vessels between 19 May and 19 June finds the distribution of the plumes largely unchanged from the first analysis, released last month. "The report indicates that subsurface oil concentrations are highest near the wellhead and become more diffuse farther away from the source," says a press release.
But in 200 sets of samples, those concentrations were found to be only a few parts per million in the water, and only as far as 52 km from the wellhead. The big question, though, is what impacts that oil may be having on ecosystems. On that score, the report says explicitly that no ecological data was taken—they don't know yet what the undersea plume is doing to organisms or food webs. But the report offers one bit of hope.
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