For thousands of years, the depths of the ocean were unreachable by
humankind – either a dark abyss or tropical seascape, which only
seaman’s tales described. Though more recently humans have made
considerable achievements in underwater research, our knowledge of the
oceans remains quite minimal in relation to its vastness. Like on land,
noise is a common phenomenon underwater and a most integral one. Marine
animals’ dependence on noise for communication forces us to recognize a
serious and substantial human impact on the underwater community: noise
pollution.
Increasing industrial and military interest in the ocean has spurred
human penetration into the depths like never before, leaving significant
destruction in its wake. In waters surrounding the United States and
around the globe, the existence of anthropogenic noise pollution in
marine habitats has already displayed severe consequences and is of
growing concern. The source of this pollution varies, but is largely the
result of shipping industries, oil drilling industries and
specifically, U.S. military testing. Despite significant evidence that
noise pollution has harmful, even deadly effects on marine life, the
industries mentioned above continue to act with utter disregard for the
effects of their marine noise emissions.
Noise is a common occurrence below the ocean surface as a product of
meteorological forces, marine communication and marine animal mating.
Sound travels swiftly over vast expanses of underwater terrain, making
it an integral means of marine mammal communication. This sound emission
is crucial to the survival of marine mammals and other species for the
purposes of mating, locating food sources, and communicating threats.
Anthropogenic noise, or ‘acoustic pollution,’ directly interferes with
this system of communication and death and destruction can result.
Depending on the origins and degree of acoustic pollution, consequences
vary from disorientation to fleeing of habitat, physical bodily harm and
even death.
The primary causes of noise pollution include sound emissions from
shipping industry boats and reflection seismology, utilized in mapping
the ocean floor for both oil drilling purposes and extensive SONAR
testing initiatives to detect submarine threats, run by the United
States Navy. Shipping noise emission serves as a chronic source of
pollution, and while not as acutely severe, can often interfere with
marine life habitat when high-traffic shipping passages and migratory
paths overlap, resulting in constant disorientation of marine creatures.
Reflection seismology and Navy SONAR use is drastically more intensive,
as is the impact on animal life.
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