Fleeting dead zones can muck with seafloor life for decades
Effects of low-oxygen conditions could offset some human-caused warming, but at a price
![Black Sea](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/02/091017_TS_low-oxygen_main-free.jpg?fit=860%2C460&ssl=1)
SUFFOCATING SEA The effects of low-oxygen conditions on seafloor communities linger even when oxygen returns, suggests a new study comparing oxygen and ecological activity in the Black Sea (shown).
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