Scientists have revealed that levels of contaminants including copper and polyaromocatic hydrocarbons (PAHs) were elevated in samples of sediment near Otaiti (Astrolabe Reef). The chemicals originiated from the Rena and its cargo and can have major impacts, for example PAHs are carcinogenic and can build up through the marine food chain into fish.
The group of scientists, including University of Waikato Chair of Coastal Science, Professor Chris Battershill, said that more monitoring is needed particularly to clarify the impact of these contaminants on marine life and more research must be done on how to address the impacts.
Access to the reef for research has been expanded recently following the success of salvage operations that had previously hindered access for scientists.
Professor Battershill said that although information is somewhat limited, "early indications are that the contamination is localised."
According to Dr Jim Miller, Bay of Plenty Medical Officer of Health, these results will not alter current advice which states that there is no significant food safety risk from the disaster.
