96b0ea99-01ad-4350-8646-b4878e2d4f12 eng dataset Digital and Data Solutions, JNCC data@jncc.gov.uk pointOfContact 2018-05-17 Habitat point records from 1982 WWA Cardiff sewerage outfalls survey 2001-08-29 2001-08-29 96b0ea99-01ad-4350-8646-b4878e2d4f12 The benthic macroinvertebrate fauna and the physico-chemical properties of the sediments were described from 66 sites in the vicinities of the Rhymney Valley, Ystradyfodwg and Pontypridd (Y & P) and Cardiff East outfalls discharging to the Severn Estuary. Except in an area close to the Y & P outfall, where redox potential was relatively low (<100 mV at 4 cm depth), the discharges had no perceptible effect on local sediment characteristics. Carbon concentrations were similar (50 mg g-1) to those found generally in this area of the Severn Estuary. A total of 26 taxa were identified and total invertebrate density ranged from 110 to 46,000 m-2. Except for an area close to the Y & P outfall, there was no evidence that the effulent discharges affected the distribution of the benthic macroinvertebrate assemblages around the outfalls were similar to those found generally in this area of the Severn Estuary. Classification analysis suggested that shore height was the environmental feature most closely associated with the distribution of the fauna. Digital and Data Solutions, JNCC data@jncc.gov.uk custodian Marine Marine Recorder JNCCMNCR10000491 Habitat MNCR Open Government Licence v3.0 otherRestrictions no limitations eng oceans -3.151978134 -3.010163902 51.42334141 51.51456903 1982-03-24 1982-04-20 Welsh Water Authority (1984) Influence of the Rhymney valley, Ystradyfodwg and Pontypridd and Cardiff East trunk sewer outfalls on the benthic macroinvertebrate fauna of the Severn estuary Welsh Office (1974) Report of the working party on possible pollution in Swansea Bay Comma Separated Values Unknown http://data.jncc.gov.uk/data/96b0ea99-01ad-4350-8646-b4878e2d4f12-1982-WWA-Cardiff-sewerage-outfalls-survey.csv 1982-WWA-Cardiff-sewerage-outfalls-survey.csv This survey was extracted from a Marine Recorder snapshot.