4f4c4942-4343-5764-6473-313130313235 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T12:40:21.783Z NRW 1.0 wel British National Grid (EPSG::27700) Sea Empress Rocky Shore Impact Assessment/Monitoring: Permanent Transects and Rock Pool Studies Sea Empress Rocky Shore Impact Assessment/Monitoring: Permanent Transects and Rock Pool Studies Asesu effaith y Sea Empress ar draethau creigiog / monitro traethau creigiog: trawsluniau parhaol ac astudiaethau o byllau glan mor 1998-12-31 NRW_DS110125 Three permanent intertidal transects in the vicinity of the Dale Fort Field Centre were established immediately following the Sea Empress oil spill. Marine communities at these sites and in rock pools at a further site were surveyed at intervals up to fourteen months post spill. Data was collected in order to assess the impact of the Sea Empress oil spill on the rocky shore. Three permanent intertidal transects in the vicinity of the Dale Fort Field Centre were established immediately following the Sea Empress oil spill. Marine communities at these sites and in rock pools at a further site were surveyed at intervals up to fourteen months post spill. Data was collected in order to assess the impact of the Sea Empress oil spill on the rocky shore. 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 Field Studies Council (FSC) Head office, Preston Montford, Montford Bridge, Shrewsbury, Shropshire, SY4 1HW, England enquiries@field-studies-council.org http://www.field-studies-council.org/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme marine and freshwater inventory rocky shore impact assessment transect (transects) (transect profile) (transect profiles) pollution (see also specific types of pollution eg. oil pollution) Dale Fort rockpools Sea Empress oil pollution monitoring (see specific types of monitoring eg. woodland monitoring) NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords Zoobenthos generic abundance Zoobenthos taxonomic abundance Habitat characterisation 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 1998. 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 biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -5.45479874 -4.42852039 51.52749037 52.06590709 1996-02-22 1997-04-08 Sea Empress rocky shore impact assessment/monitoring: Dale Fort Field Centre permanent transects and rock pool studies Documents [A] Report (MS Word, Pdf-format) Delimited [B] Data in spreadsheet format (MS Excel) 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 Transect and rock pool surveys were carried out. - Transect Studies: All transects were surveyed using 0.25m2 frame quadrats at 1m vertical height intervals. Where possible, direct counts were made of numbers of individuals of each species present within the quadrat frame. When direct counting was rendered either impossible, because of the overwhelming numbers of individuals present or inappropriate, because of the growth form of the species; two different approaches were adopted. For all algae, lichens, small barnacles and colonial animals (e.g. sponges), percentage cover within the quadrat frame was estimated. For Littorina saxatilis (agg.) (rough periwinkles) and Melarhaphe neritoides (small periwinkle) the quadrat frame was sub-divided to form a smaller quadrat 0.10% of its total area. Numbers of individuals were counted within this smaller quadrat and the total multiplied by 10 to give an estimate of numbers per 0.25m2. Transect studies: Castle Beach Bay - Transect1: Grid reference: SM 824051 / Slip-Pier Beach - Transect 2: Grid reference: SM 822053 / Monkhaven - Transect 3: Grid reference: SM 829064 - Rock-pool Studies: Where appropriate, numbers of individuals of each species were counted within each pool. Algae and colonial animals were assayed by estimating percentage cover of each species within the pool. Rockpool studies: Slip-Pier Beach near Dale Fort: Grid reference: SM 822052 Transect and rock pool surveys were carried out. - Transect Studies: All transects were surveyed using 0.25m2 frame quadrats at 1m vertical height intervals. Where possible, direct counts were made of numbers of individuals of each species present within the quadrat frame. When direct counting was rendered either impossible, because of the overwhelming numbers of individuals present or inappropriate, because of the growth form of the species; two different approaches were adopted. For all algae, lichens, small barnacles and colonial animals (e.g. sponges), percentage cover within the quadrat frame was estimated. For Littorina saxatilis (agg.) (rough periwinkles) and Melarhaphe neritoides (small periwinkle) the quadrat frame was sub-divided to form a smaller quadrat 0.10% of its total area. Numbers of individuals were counted within this smaller quadrat and the total multiplied by 10 to give an estimate of numbers per 0.25m2. Transect studies: Castle Beach Bay - Transect1: Grid reference: SM 824051 / Slip-Pier Beach - Transect 2: Grid reference: SM 822053 / Monkhaven - Transect 3: Grid reference: SM 829064 - Rock-pool Studies: Where appropriate, numbers of individuals of each species were counted within each pool. Algae and colonial animals were assayed by estimating percentage cover of each species within the pool. Rockpool studies: Slip-Pier Beach near Dale Fort: Grid reference: SM 822052