01844401-30f8-42c9-a870-82495a479f62 eng dataset Digital and Data Solutions, JNCC data@jncc.gov.uk pointOfContact 2018-05-17 Species point records from 1988-89 NRA Orwell Estuary sublittoral survey 2001-08-29 2001-08-29 01844401-30f8-42c9-a870-82495a479f62 The main objective of this study was to assess the impact of the major discharge, Cliff Quay Sewage Treatment works on the benthic fauna of the Orwell Estuary. One Day Grab sample was taken at each of twenty eight sites. Sub samples of the sediment were taken for particle-size analysis and organic carbon content determination. The remainder of each sample was put through a 500 micron sieve and stored for later analysis. The results obtained indicated a gradual improvement of the subtidal fauna in a seaward direction. Four species assemblages were identified correlating with the distance down stream from the Orwell Bridge, the combined percentages of silt and clay and the percentage of organic carbon content. Sites in the upper estuary had low diversity, dominated by Tubificoides pseudogaster, Tubificoides swirencoides and Tharyx sp.. A faunistically impoverished area was observed around the Woolverstone Marina (sites 7-10), whereas an area of relatively high diversity was detected down stream of Collimer Point (sites 19-28). Digital and Data Solutions, JNCC data@jncc.gov.uk custodian Marine Marine Recorder JNCCMNCR10000328 MNCR Species Open Government Licence v3.0 otherRestrictions no limitations eng oceans 1.160733018 1.28769197 51.96097324 52.02903522 1989-04-24 1989-04-26 Baxter (1989) Survey of the subtidal and intertidal benthic fauna in the Orwell estuary. Autumn 1988/Spring 1989 Fisher, Emblow, Bolt Ed: Fisher (1990) An environmental atlas of the Irish Sea Comma Separated Values Unknown http://data.jncc.gov.uk/data/01844401-30f8-42c9-a870-82495a479f62-1988-89-NRA-Orwell-Estuary-sublittoral-survey.csv 1988-89-NRA-Orwell-Estuary-sublittoral-survey.csv This survey was extracted from a Marine Recorder snapshot.