A team of 17 scientists with the National Oceanic and Atmospheric Administration collected nearly 55 tons of marine debris which threatens monk seals, sea turtles and other marine life at the Papahanaumokuakea Marine National Monument.
NOAA has conducted annual removal missions of marine debris in the Northwestern Hawaiian Islands since 1996 as part of a coral restoration effort.
The scientists arrived in Honolulu on Saturday after a month at Papahanaumokuakea.
"What surprises us is that after many years of marine debris removal in Papahanaumokuakea and more than 700 metric tons of debris later, we are still collecting a significant amount of derelict fishing gear from the shallow coral reefs and shorelines," said Kyle Koyanagi, marine debris operations manager at NOAA Fisheries' Pacific Islands Fisheries Science Center and chief scientist for the mission. "The ship was at maximum capacity and we did not have any space for more debris."
This year, marine debris was collected from waters and shorelines around northern most islands and atolls -- Kure Atoll, Midway Atoll, Pearl and Hermes Atoll, Lisianski Island and Laysan Island.
Approximately half of the debris was comprised of derelict fishing gear and plastics from Midway Atoll's shallow coral reef environments, where the team also completed a 27-day land-based mission prior to loading debris on the 224-ft. NOAA Ship Oscar Elton Sette.
As part of this year’s mission, the NOAA team did look for debris from the 2011 tsunami in Japan. However, no debris with an explicit connection to the tsunami was found.
Scientists monitored marine debris for radiation in partnership with the Hawaii Department of Health out of abundance of caution and to gather baseline data from the Northwestern Hawaiian Islands.
"While we did not find debris with an obvious connection to last year’s tsunami, this mission was a great opportunity to leverage activities that had already been planned and see what we might find," said Carey Morishige, Pacific Islands regional coordinator for NOAA’s Marine Debris Program. "It’s also an important reminder that marine debris is an everyday problem, especially here in the Pacific."
A portion of the funding for this year’s marine debris removal activities was provided as part of the legal settlement collected by NOAA’s Damage Assessment, Remediation and Restoration Program from a July 2005 ship grounding at Pearl and Hermes Atoll in the Monument.