Researchers say the dead zone in the Gulf
of Mexico could be the largest on record and
continue to threaten the over half billion dollar gulf coast seafood industry.
Scientists
are predicting the area could measure between 7,200 and 8,500 square miles, or
an area roughly the size of The largest hypoxic zone measured to date occurred in 2002 and encompassed more than 8,400 square miles.
The Gulf dead zone forms each spring and
summer off the Louisiana
and Texas
coast when oxygen levels drop too low to support most life in bottom and
near-bottom waters.
The zone is caused by nitrates and
nitrogen from fertilizer and urban runoff flowing down the Mississippi
River .
The amount of nitrogen entering the Gulf
of Mexico each spring has increased by about 300 percent
since the 1960s, mainly due to increased agricultural runoff.
Heavy
flooding in the midwest this year is expected to make the problem worse.The dockside value of commercial fisheries in the Gulf is estimated at $629 million.
Nearly three million recreational fishermen add more than $1 billion dollars to the
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