Saturday, May 28News That Matters
Shadow

Tag: zooplankton

Seismic surveys responsible for high zooplankton mortality rates

Seismic surveys responsible for high zooplankton mortality rates

Science
June 23 (UPI) -- Seismic surveys carried out by the oil and gas industry are causing high mortality rates among zooplankton, according to new research out of Australia.Seismic air guns are frequently used on marine petroleum expeditions. New research found the air blasts dramatically increase mortality rates among target zooplankton species. Testing also showed the air gun's negative impact extends well beyond previous range estimates.Testing revealed air gun pulses yielded between an 18 and 60 percent increase in zooplankton mortality rates. The seismic blasts also killed al zooplankton larva. These effects extended across nearly 4,000 feet. It was previously believed the negative impact of seismic air guns was limited to roughly 30 feet.The findings -- detailed in a study published Thurs...