Consent requirement survey to monitor potential ecological effects on fish processing effluent from a seabed diffuser located 350 m offshore. Temporal coverage: 1980 (baseline) 2000-2011 (on-going monitoring) Number of sites: 9 sites Nelson Haven Boulder Bank, Nelson Sampling Frequency: 5 yearly Main marine environment sampled: Coastal (Boulder bank) Depth zone: Subtidal (7-8 m) Sediment type: Primarily hard Community association: Rocky reef Sampling method: Photo-quadrats, sediment cores Parameters collected: Sediment, epi-fauna (images only) Measured variables: Sediment: chemistry, particle size, organic content, TKN, HG levels; Community: epi-fauna composition (using dots on rocks (DOR) analysis from images Species/Community data: Benthic invertebrates, algae Other data collected: Unknown Collection: ongoing Quality assurance: Yes