Hearing loss is amongst the most extreme and immediate form of physiological harm to marine mammals from exposure to seismic blasting.
(Photo: Wikimedia Common)
Aug 24, 2015
A new report urges "extreme caution" in using seismic airguns to explore for fossil fuels underwater, saying it is "indisputable" that the practice has adverse impacts on Arctic marine life, especially whales.
Seismic testing involves a vessel towing an array of airguns that continuously blast loud, low-frequency sound waves down through the water column and into the seabed at intervals as short as ten seconds. Depending on the size of the area designated for the survey, the operations can last for weeks on end.
"This new study shows how destructive seismic blasting can be for whales yet they continue with their pursuit for oil with no regard for environmental impacts and Inuit rights."
--Jerry Natanine, Clyde River mayor
"It is clear that noise from seismic activity has an impact on whales as it can damage their hearing, ability to communicate and also displace animals, affecting diving behavior, feeding, and migration patterns," said report author Oliver Boisseau, senior research scientist at Marine Conservation Research, which conducted the study (pdf) for Greenpeace Nordic.
"There are increasing indications that this could cause serious injury," he said, "and may also disrupt reproductive success and increase the risk of strandings and ice entrapments."
The report states that narwhals, in particular, tend to "freeze and sink" rather than flee the area in response to a threat such as noise. This means narwhals—an at-risk species shown to be one of the most vulnerable Arctic marine mammals to climate change—are more susceptible to damage from airgun blasts as they are not inclined to avoid regions impacted by noise. In turn, they experience increased stress hormones and entrapments due to disrupted migration patterns.
The report acknowledges a "massive research gap in this field," yet as Ethan Cox writes for Ricochet, it is sure to have implications in Canada, where the Inuit community of Clyde River has gone to court to prevent seismic blasting up and down the length of Baffin Island in the Davis Strait.
Last week, Canada's Federal Court of Appeal denied the hamlet's request for a judicial review of a testing permit issued by the National Energy Board. Clyde River Mayor Jerry Natanine immediately vowed to appeal the ruling to the Supreme Court. On Monday, he told Ricochet that the Greenpeace study only supported Clyde River's case.
"One would hope for a limit on the greed of oil companies," Natanine said. "This new study shows how destructive seismic blasting can be for whales, yet they continue with their pursuit of oil with no regard for environmental impacts and Inuit rights."
Indeed, added Boisseau: "It is alarming to consider the vast amount of seismic activity being planned and conducted in the High Arctic, given the fragile nature of the ecosystem and the potential for disturbance and harm to whales. It seems justified to urge for extreme caution given both the lack of data and the limited understanding of the short and long-term impact of seismic noise on sensitive Arctic species, especially the narwhal."
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Deirdre Fulton
Deirdre Fulton is a former Common Dreams senior editor and staff writer. Previously she worked as an editor and writer for the Portland Phoenix and the Boston Phoenix, where she was honored by the New England Press Association and the Association of Alternative Newsweeklies. A Boston University graduate, Deirdre is a co-founder of the Maine-based Lorem Ipsum Theater Collective and the PortFringe theater festival. She writes young adult fiction in her spare time.
big oilbiodiversityclimate changeconservationfossil fuelsnoise pollutionoceansseismic airgunssupreme courtwhales
A new report urges "extreme caution" in using seismic airguns to explore for fossil fuels underwater, saying it is "indisputable" that the practice has adverse impacts on Arctic marine life, especially whales.
Seismic testing involves a vessel towing an array of airguns that continuously blast loud, low-frequency sound waves down through the water column and into the seabed at intervals as short as ten seconds. Depending on the size of the area designated for the survey, the operations can last for weeks on end.
"This new study shows how destructive seismic blasting can be for whales yet they continue with their pursuit for oil with no regard for environmental impacts and Inuit rights."
--Jerry Natanine, Clyde River mayor
"It is clear that noise from seismic activity has an impact on whales as it can damage their hearing, ability to communicate and also displace animals, affecting diving behavior, feeding, and migration patterns," said report author Oliver Boisseau, senior research scientist at Marine Conservation Research, which conducted the study (pdf) for Greenpeace Nordic.
"There are increasing indications that this could cause serious injury," he said, "and may also disrupt reproductive success and increase the risk of strandings and ice entrapments."
The report states that narwhals, in particular, tend to "freeze and sink" rather than flee the area in response to a threat such as noise. This means narwhals—an at-risk species shown to be one of the most vulnerable Arctic marine mammals to climate change—are more susceptible to damage from airgun blasts as they are not inclined to avoid regions impacted by noise. In turn, they experience increased stress hormones and entrapments due to disrupted migration patterns.
The report acknowledges a "massive research gap in this field," yet as Ethan Cox writes for Ricochet, it is sure to have implications in Canada, where the Inuit community of Clyde River has gone to court to prevent seismic blasting up and down the length of Baffin Island in the Davis Strait.
Last week, Canada's Federal Court of Appeal denied the hamlet's request for a judicial review of a testing permit issued by the National Energy Board. Clyde River Mayor Jerry Natanine immediately vowed to appeal the ruling to the Supreme Court. On Monday, he told Ricochet that the Greenpeace study only supported Clyde River's case.
"One would hope for a limit on the greed of oil companies," Natanine said. "This new study shows how destructive seismic blasting can be for whales, yet they continue with their pursuit of oil with no regard for environmental impacts and Inuit rights."
Indeed, added Boisseau: "It is alarming to consider the vast amount of seismic activity being planned and conducted in the High Arctic, given the fragile nature of the ecosystem and the potential for disturbance and harm to whales. It seems justified to urge for extreme caution given both the lack of data and the limited understanding of the short and long-term impact of seismic noise on sensitive Arctic species, especially the narwhal."
Deirdre Fulton
Deirdre Fulton is a former Common Dreams senior editor and staff writer. Previously she worked as an editor and writer for the Portland Phoenix and the Boston Phoenix, where she was honored by the New England Press Association and the Association of Alternative Newsweeklies. A Boston University graduate, Deirdre is a co-founder of the Maine-based Lorem Ipsum Theater Collective and the PortFringe theater festival. She writes young adult fiction in her spare time.
A new report urges "extreme caution" in using seismic airguns to explore for fossil fuels underwater, saying it is "indisputable" that the practice has adverse impacts on Arctic marine life, especially whales.
Seismic testing involves a vessel towing an array of airguns that continuously blast loud, low-frequency sound waves down through the water column and into the seabed at intervals as short as ten seconds. Depending on the size of the area designated for the survey, the operations can last for weeks on end.
"This new study shows how destructive seismic blasting can be for whales yet they continue with their pursuit for oil with no regard for environmental impacts and Inuit rights."
--Jerry Natanine, Clyde River mayor
"It is clear that noise from seismic activity has an impact on whales as it can damage their hearing, ability to communicate and also displace animals, affecting diving behavior, feeding, and migration patterns," said report author Oliver Boisseau, senior research scientist at Marine Conservation Research, which conducted the study (pdf) for Greenpeace Nordic.
"There are increasing indications that this could cause serious injury," he said, "and may also disrupt reproductive success and increase the risk of strandings and ice entrapments."
The report states that narwhals, in particular, tend to "freeze and sink" rather than flee the area in response to a threat such as noise. This means narwhals—an at-risk species shown to be one of the most vulnerable Arctic marine mammals to climate change—are more susceptible to damage from airgun blasts as they are not inclined to avoid regions impacted by noise. In turn, they experience increased stress hormones and entrapments due to disrupted migration patterns.
The report acknowledges a "massive research gap in this field," yet as Ethan Cox writes for Ricochet, it is sure to have implications in Canada, where the Inuit community of Clyde River has gone to court to prevent seismic blasting up and down the length of Baffin Island in the Davis Strait.
Last week, Canada's Federal Court of Appeal denied the hamlet's request for a judicial review of a testing permit issued by the National Energy Board. Clyde River Mayor Jerry Natanine immediately vowed to appeal the ruling to the Supreme Court. On Monday, he told Ricochet that the Greenpeace study only supported Clyde River's case.
"One would hope for a limit on the greed of oil companies," Natanine said. "This new study shows how destructive seismic blasting can be for whales, yet they continue with their pursuit of oil with no regard for environmental impacts and Inuit rights."
Indeed, added Boisseau: "It is alarming to consider the vast amount of seismic activity being planned and conducted in the High Arctic, given the fragile nature of the ecosystem and the potential for disturbance and harm to whales. It seems justified to urge for extreme caution given both the lack of data and the limited understanding of the short and long-term impact of seismic noise on sensitive Arctic species, especially the narwhal."
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