4f4c4942-4343-5764-6473-313130303938 English NRW_DS24328 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-05T10:24:59.541Z NRW 1.0 wel British National Grid (EPSG::27700) Appraisal of Environmental Impact and Recovery Using Laminaria Holdfast Faunas Appraisal of Environmental Impact and Recovery Using Laminaria Holdfast Faunas Arfarnu'r effaith ar yr amgylchedd ac ymadferiad yr amgylchedd gan ddefnyddio ffawna gludafaelion Laminaria 1996 Warwick PMSA -Appraisal of environmental impact and recovery using Laminaria holdfasts [MRCCW10000000093] 1999-01-31 NRW_DS110098 The Sea Empress spill provided an opportunity to test the applicability of Laminaria holdfast faunal communities for detecting the pollution effects of a putative oil contamination gradient, and to assess the immediate response and consequent recovery of components of the holdfast fauna to oil pollution. Data captured to test the applicability of Laminaria holdfast faunal communities for detecting the pollution effects of a putative oil contamination gradient, and to assess the immediate response and consequent recovery of components of the holdfast fauna to oil pollution. The Sea Empress spill provided an opportunity to test the applicability of Laminaria holdfast faunal communities for detecting the pollution effects of a putative oil contamination gradient, and to assess the immediate response and consequent recovery of components of the holdfast fauna to oil pollution. Data captured to test the applicability of Laminaria holdfast faunal communities for detecting the pollution effects of a putative oil contamination gradient, and to assess the immediate response and consequent recovery of components of the holdfast fauna to oil pollution. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Plymouth Marine Laboratory Prospect Place, The Hoe, Plymouth, PL1 3DH forinfo@pml.ac.uk http://www.pml.ac.uk/ Countryside Council for Wales (CCW) Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme environmental impact pollution (see also specific types of pollution eg. oil pollution) marine and freshwater inventory Laminaria digitata holdfasts Sea Empress environmental recovery laminaria hyperborea kelp holdfast communities oil pollution Celtic Sea oil developments macrofauna meiofauna NRW Thesaurus 2026-03-04 geonetwork.thesaurus.local.theme.converted_nrw-keywords Macroalgae and seagrass taxonomy-related counts SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml Oil spillage IPSV Subjects List 2020-11-18 geonetwork.thesaurus.external.theme.subjects There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW 1999.There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source English environment England (ENG) Wales (WLS) -5.40713544 -2.19702215 50.95032425 52.09771244 SeaVoX Vertical Co-ordinate Coverages 2013-02-05 creation infralittoral 1996-03-01 1998-04-30 Appraisal of environmental impact and recovery using Laminaria holdfast faunas Documents [A] Report (MS Word) Delimited [B] Data in spreadsheet format (MS Excel) Database MS Access [C] Marine Recorder Survey MRCCW10000000093 Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Four sites were chosen to reflect potentially differing levels of impact from the oil spill. The maximum length (L), breadth (nearest 0.1 cm) of every holdfast was being measured, in order to calculate the volume of each holdfast using the formula of Jones (1971). Holdfasts were broken up and sieved to collect and identify macrofauna and meiofauna. The amount of oil in the Laminaria stipes was quantified ( g oil per g algae) fluorometrically using a sycnhronous scanning (23 nm interval) technique, with yellow fuel oil as a standard Warwick and Clarke (1995). Univariate 'biodiversity' measures, termed taxonomic diversity and taxonomic distinctness used to describe community composition and structure. The Welsh and North Devon coastal sites include: West Angle, East Angle, Dale Fort, West Blockhouse, Gateholm, Martin's Haven, Musselwick, St. Brides, Abereiddy, Porth Gain, Aber Draw, Abercastle, Hartland Quay, Welcombe Mouth, Morwenstow, Duckpool. Monitoring and impact assessment following the Sea Empress oil spill. This dataset contributed to the Pembrokeshire Marine Species Atlas, see separate metadata entry. Four sites were chosen to reflect potentially differing levels of impact from the oil spill. The maximum length (L), breadth (nearest 0.1 cm) of every holdfast was being measured, in order to calculate the volume of each holdfast using the formula of Jones (1971). Holdfasts were broken up and sieved to collect and identify macrofauna and meiofauna. The amount of oil in the Laminaria stipes was quantified ( g oil per g algae) fluorometrically using a sycnhronous scanning (23 nm interval) technique, with yellow fuel oil as a standard Warwick and Clarke (1995). Univariate 'biodiversity' measures, termed taxonomic diversity and taxonomic distinctness used to describe community composition and structure. The Welsh and North Devon coastal sites include: West Angle, East Angle, Dale Fort, West Blockhouse, Gateholm, Martin's Haven, Musselwick, St. Brides, Abereiddy, Porth Gain, Aber Draw, Abercastle, Hartland Quay, Welcombe Mouth, Morwenstow, Duckpool. Monitoring and impact assessment following the Sea Empress oil spill. This dataset contributed to the Pembrokeshire Marine Species Atlas, see separate metadata entry.