Bureau of Ocean Energy ManagementAreas that would be opened to seismic testing for oil and gas deposits off the Atlantic coast.
As a federal decision draws near, environmental and commercial
fishing groups are marshaling their forces to protest a plan by the
Obama administration to allow seismic airgun testing for oil and gas
exploration off the Atlantic coast.
The
Interior Department
has signaled that it would reach a final decision early next year on
whether to approve a draft environmental assessment that would help lay
the groundwork for such testing along the coasts of seven states, from
the northern tip of Delaware to central Florida.
The environmental and fishing groups argue that noise from the
seismic blasts could disrupt the lives of marine animals that rely on
sound to travel, feed, mate, and communicate and could lead to the
beachings and deaths of whales.
So far the department’s
Bureau of Ocean Energy Management
has received more than 29,000 public comments related to petitions
opposing the seismic tests. “If they receive an environmental impact
statement that says ‘go for it,’ they could start in 2013,” warned
Matthew Huelsenbeck, a marine scientist for the environmental organization
Oceana. “This is coming down to the wire.”
In its draft environmental assessment, the federal bureau predicts that
seismic testing would result in some “harassments” of marine animals
that could result in injuries or in a few cases, deaths. Still, in
accordance with the
Endangered Species Act and
Marine Mammal Protection Act,
the government’s plan calls for mitigation efforts like barring
testing in certain areas during critical feeding and breeding periods of
the endangered
north Atlantic right whale.
Over all, the bureau’s assessment projects that impacts on marine life from the testing would be moderate.
Still, the agency has said that if it determines that the risks to
wildlife are too great, the testing will not be carried out. “Protecting
the environment is also what we do here, while safeguarding the
development of America’s offshore energy,” said John Filostrat, a bureau
spokesman.
The testing by geophysical companies would end a moratorium of more
than two decades on oil exploration along the Eastern seaboard that
President Obama decided to lift in 2010.
The tests are to be performed by a vessel that trails evenly spaced
hydrophones
in its wake as compressed air is blasted downward by the vessel’s
airgun. The resulting sound waves, as high as 250 decibels, are far
greater than the sound emitted by a jet engine upon takeoff, Oceana
notes.
Once the sound waves hit the ocean floor, the hydrophones register
echoes that reflect the densities of materials like gas and oil within
the seabed.
In an e-mail, a representative of the
Bureau of Ocean Energy Management
said that surveying techniques had improved considerably in recent
decades. The technology will allow the agency to update and refine its
body of scientific information on the geology of the mid-and South
Atlantic regions, informing its decision-making on oil and gas leasing,
the agency spokesman said.
Environmentalists and commercial and recreational fishermen are
nonetheless concerned about the intensity and frequency of the airgun
blasts: they will be fired every few seconds around the clock and can
continue for several weeks. The waves “reverberate around the ocean, and
they create this massive acoustic footprint” – loud enough to travel
thousands of square miles, said Mr. Huelsenbeck of Oceana.
The intensity and reach of the noise will not only drive some marine
animals away and disrupt their feeding patterns, Oceana argues, but
could damage or destroy their hearing. This is particularly worrisome
for whales, which do not have sharp eyesight and
depend heavily on their hearing. Without it, “they can’t navigate, they
can’t function,” Mr. Huelsenbeck said. “They keep contact with others
based on their calls.”
Animals like whales decline slowly once their hearing is gone, making
it difficult to link a death directly with the seismic tests, he
added.
Oceana also points to seismic testing conducted in 2001 off Sakhalin
Island in Russia that was associated with the departure of endangered
gray whales from a primary feeding area.
In other cases, the connection between seismic testing and effects on
animals is less certain, as with the mass beaching of 900 long-beaked
common dolphins and porpoises
in Peru this year.
The government ruled out the sound waves as a cause, but a marine
veterinarian and conservationist who examined many of the corpses
found bleeding and fractures in the middle ear — the type of trauma that could result from intense noise.
Beyond environmental concerns, the ocean expanse also supports an
annual $11.8 billion dollar fishing industry. Oceana has helped to
mobilize
opposition
from fishing associations that worry that the sonic blasts could
displace commercially valuable fish stocks or damage eggs and larvae.