48181b90-21a7-137f-97d7-d50fe2dd2bf4 eng utf8 dataset custodian NIWA National Institute of Water and Atmospheric Research +64 4 386 0300 voice +64 4 386 0574 facsimile 301 Evans Bay Parade Hataitai Wellington 6021 New Zealand curator@niwa.co.nz http://www.niwa.co.nz Website of the National Institute of Water and Atmospheric Research, New Zealand - experts in environmental science Data curator 2015-06-12T11:51:41 creation ISO 19115-3 urn:ogc:def:crs:EPSG::4326 OGP NZST/NZDT Transmission Gully Marine Benthic Monitoring: Report on Baseline 2 Sampling creation revision This report describes the winter 2013 (Baseline 2) marine benthic monitoring, conducted in early July, and presents a brief description of the benthic invertebrate communities, habitats, sediment types, and sediment contaminant concentrations found at each site. All samples collected were surface samples from either intertidal or subtidal locations. Sampling was conducted at 10 subtidal and 10 intertidal monitoring sites in Porirua Harbour, to quantify and describe benthic communities, sediment characteristics and sediment contaminant levels. Specifically, at the subtidal sites, eight 10 cm diam. x 15 cm deep cores were collected using divers, for macroinvertebrate identification and enumeration and three composite core samples were collected for sediment contaminant and grain size analysis. The surface sediment (0-3 cm) was removed from 5 or 6 smaller cores (7 cm diameter) and these fractions were pooled to produce a composite core sample for contaminant and grain size analysis. One core (13 cm diameter x 15 cm deep) was collected from each intertidal site at low tide from within one 5 m x 5 m grid to determine community composition. A 0.25 m² quadrat was also photographed adjacent to each macroinvertebrate core for later assessment of epifaunal invertebrate community and macroalgal cover. Three samples of surface sediment (0-2 cm) were collected from each site for sediment contaminant and grain size analyses. Three composite samples were prepared, by combining samples from grids A, B, C, D, E (sample 1), from grids F, G, H, I, J (Sample 2), and from grids K, L, M, N, O (Sample 3). All sediment contaminant samples were collected using clean HDPE plastic trowels and trays. Samples were sealed in double zip-lock bags and stored on ice until shipped to the laboratory for processing. As part of the planned Transmission Gully roading development, MWH commissioned NIWA to carry out the winter 2013 (Baseline 2) monitoring of marine benthic habitats in Porirua Harbour. Vonda Cummings, Greg Olsen, Jane Halliday, Peter Marriott, Mark Fenwick, Kelly Carter (NIWA). completed pointOfContact NIWA Vonda.Cummings@niwa.co.nz Vonda Cummings Marine Ecologist author NIWA Greg.Olsen@niwa.co.nz Greg Olsen Principal Technician author NIWA Jane Halliday Marine ecology Technician author NIWA Peter Marriott Principal Technician-Marine Biology author NIWA Mark Fenwick Marine Ecology Technician author NIWA Kelly Carter Marine ecology Technician vector transportation Wellington Region-Porirua Harbour 176.564062,-40.811110 176.211252,-40.659210 175.268221,-40.768713 174.851416,-40.628590 174.603476,-40.895861 174.412973,-41.469383 175.424440,-41.795172 176.054712,-41.493254 176.564062,-40.811110 174.412973 176.564062 -41.795172 -40.628590 Transmission Gully Porirua Harbour sediment contaminants grain size marine benthic monitoring PAHs heavy metals bioavailable metals MWH14301 theme NIWA Project Codes 2012-01-01 publication NIWA_ProjectCode Commercial report. Data collection and analysis commissioned by MWH for New Zealand Transport Agency (NZTA). Permission required from NZTA to use Data. Data collection and analysis commissioned by MWH for NZTA. Permissions required to use data. via Point of contact confidential eng https://dc.niwa.co.nz/niwa_dc/srv/metadata/48181b90-21a7-137f-97d7-d50fe2dd2bf4 WWW:LINK-1.0-http--metadata-URL Point of truth URL of this metadata record Contaminant data generated by Hill Laboratories. Grain size and benthic data generated by NIWA. dataset Data Commissioned by MWH for NZTA. Permissions required to use data. restricted