4f4c4942-4343-5764-6473-313232353930 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2024-05-31T09:22:35.654Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Survey of Invasive Non-Native Species (INNS) at Welsh dredge disposal sites: Milford Haven and the Severn Estuary 2018 Survey of Invasive Non-Native Species (INNS) at Welsh dredge disposal sites: Milford Haven and the Severn Estuary 2018 NRW_INNS_dredge_disposal_survey_2018 2018-09-05 NRW_DS122590 Natural Resources Wales (NRW) contracted Marine Ecological Solutions Ltd. (Marine EcoSol) to analyse species and habitats surveyed in several dredge disposal sites around Wales (Milford Haven, the Severn Estuary, Swansea Bay Outer and Holyhead Deed), and undertake a data and literature review to discuss the potential for marine Invasive Non-Native Species (INNS) transfer via dredge disposal pathways. The purpose of the surveys was to obtain information to inform decision making to minimise further spread of non-native species from dredge disposal. Natural Resources Wales (NRW) contracted Marine Ecological Solutions Ltd. (Marine EcoSol) to analyse species and habitats surveyed in several dredge disposal sites around Wales (Milford Haven, the Severn Estuary, Swansea Bay Outer and Holyhead Deed), and undertake a data and literature review to discuss the potential for marine Invasive Non-Native Species (INNS) transfer via dredge disposal pathways. The purpose of the surveys was to obtain information to inform decision making to minimise further spread of non-native species from dredge disposal. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Marine Ecological Solutions Ltd Marine Ecological Solutions Ltd, 41 High Street, Menai Bridge, Ynys Mon, LL59 5EF, Wales info@marine-ecosol.com http://www.marine-ecosol.co.uk Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Marine Ecological Solutions Ltd Marine Ecological Solutions Ltd, 41 High Street, Menai Bridge, Ynys Mon, LL59 5EF, Wales info@marine-ecosol.com http://www.marine-ecosol.co.uk 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 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme dredging slipper limpet crepidula fornicata NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation Seabed photography Zoobenthos taxonomic abundance SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Attribution statement: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. English biota environment oceans SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 circalittoral Bridgwater Bay Celtic Sea Bristol Channel Severn Estuary -5.78 -2.79 51.25 51.64 2018-07-03 2018-09-05 10.5 76 urn:ogc:def:datum:EPSG::5100 Sea Level depth is unadjusted and does not take into account tidal height See Baldock, L., Moore, A., Wray, B., Evans, S. and E. Morris-Webb. 2019. Survey of Invasive Non-Native Species (INNS) at Welsh dredge disposal sites: Milford Haven and the Severn Estuary 2018. NRW Report. Database Database 2018 NRW INNS Dredge Disposal Survey MRCCW325 NBNData.mdb Documents Baldock et al 2018 Dredge disposal Invasive Non-Native Species (INNS) monitoring report.docx 2018 Dredge Disposal INNS proforma R2.xlsx 2018 INNS Grab & Trawl Survey proforma_R1.xlsx Image Photographs and still images of the seabed 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 false Towed underwater imagery was collected from dredge disposal sites Milford Haven 2 and 3 comprising video and stills. Grab and trawl samples were collected from Merkur Bouy, Cardiff Grounds and Newport. Marine EcoSol was contracted to analyse towed underwater imagery from the Milford Haven surveys. Video and stills imagery from Milford Haven were analysed for substrates and species (including any INNS), and their habitats classified using the JNCC Marine Habitat Classification system. Photographs of the epibenthic species collected from the Severn Estuary surveys were also re-checked for INNS. All data were entered Marine Recorder v5.4 under the survey name '2018 NRW INNS Dredge Disposal Survey'. Imagery was of varying quality, and small epibenthic trawks and grabs possibly insufficient to pick up the presence of INNS within dredge disposal sites. Methodological limitations are discussed within the associated report, Baldock et al. (2019). Towed underwater imagery was collected from dredge disposal sites Milford Haven 2 and 3 comprising video and stills. Grab and trawl samples were collected from Merkur Bouy, Cardiff Grounds and Newport. Marine EcoSol was contracted to analyse towed underwater imagery from the Milford Haven surveys. Video and stills imagery from Milford Haven were analysed for substrates and species (including any INNS), and their habitats classified using the JNCC Marine Habitat Classification system. Photographs of the epibenthic species collected from the Severn Estuary surveys were also re-checked for INNS. All data were entered Marine Recorder v5.4 under the survey name '2018 NRW INNS Dredge Disposal Survey'. Imagery was of varying quality, and small epibenthic trawks and grabs possibly insufficient to pick up the presence of INNS within dredge disposal sites. Methodological limitations are discussed within the associated report, Baldock et al. (2019).