Question

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Which bacterial taxa were overabundant before partial capture of oil began? Which two taxa
returned to normal abundance soonest? Why do you think their abundances decreased when
they did?
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What does the dashed line on June 3 represent? How do you think this action by humans
changed the microbial community?
What does the solid line on July 15 represent? How do you think this action by humans changed
the microbial community?
If bacteria like Oceanospirillales and Pseudomonas were not naturally present in the Gulf of
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Answer 1

What is the source of complex organic matter that fueled the enrichment of bacteria after the well was shut-in?

What do you think was the source of complex organic matter that fueled the enrichment of bacteria after the well was shut-in? The hydrocarbon-degrading bacteria in this study have existed naturally in the ocean for millions of years, long before humans began drilling for oil.

Answer 2

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