Te Awarua-o-Porirua Harbour subtidal sediment quality monitoring: Results from the 2010 survey
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This report presents the results of the fourth survey of sediment
quality and benthic community health at five subtidal sites in
Te Awarua-o-Porirua Harbour. These sites were sampled in November and
December 2010. Consistent with the results of the 2004, 2005 and 2008 surveys,
concentrations of total copper, lead and zinc are above 'early
warning' sediment quality guidelines in the subtidal
sediments of the Onepoto Arm of Porirua Harbour.
Our analyses indicate that the combination of higher heavy metal,
mud and organic content is influencing the structure or health of the
benthic invertebrate communities at some sites within the harbour.
quality and benthic community health at five subtidal sites in
Te Awarua-o-Porirua Harbour. These sites were sampled in November and
December 2010. Consistent with the results of the 2004, 2005 and 2008 surveys,
concentrations of total copper, lead and zinc are above 'early
warning' sediment quality guidelines in the subtidal
sediments of the Onepoto Arm of Porirua Harbour.
Our analyses indicate that the combination of higher heavy metal,
mud and organic content is influencing the structure or health of the
benthic invertebrate communities at some sites within the harbour.