4f4c4942-4343-5764-6473-313136353138 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2024-05-31T09:40:21.748Z NRW 1.0 wel British National Grid (EPSG::27700) Intertidal Special Area of Conservation (SAC) Monitoring Menai Strait and Conwy Bay (2012): Evaluating Intertidal Seagrass Beds – Field Survey Versus Remote Sensing Intertidal Special Area of Conservation (SAC) Monitoring Menai Strait and Conwy Bay (2012): Evaluating Intertidal Seagrass Beds – Field Survey Versus Remote Sensing Ardal Cadwraeth Arbennig (ACA) rynglanwol yn monitro Afon Menai a Bae Conwy (2012): Gwerthuso gwelyau o wellt-y-gamlas rhynglanwol – arolwg maes yn erbyn synhwyro o bell Evaluating intertidal seagrass Zostera noltii beds – field survey vs remote sensing 2013-12-31 NRW_DS116518 Seagrass beds are of special interest in Wales as features under the Wildlife and Countryside Act 1981 (as amended), a Section 42 habitat under the NERC Act (2006), a subfeature of Special Areas of Conservation under the Habitats Regulations and is a biological quality element (marine angiosperms) under the Water Framework Directive. As such, it is crucial that a reliable method of evaluating the quality (extent, density and species richness) of the seagrass beds is used. Traditionally, field observations are made, and records of the presence and extent derived from mapping using a GPS. Until recent years, the resolution of aerial photographs, taken from aircraft, has not been high enough to differentiate seagrass beds, unless they are particularly dense, with clearly defined edges. Many of the intertidal seagrass beds in Wales are patchy and of low density (5-50% cover) and cannot be identified reliably from 1:5,000 aerial photographs. This study uses an unmanned aerial vehicle to take higher resolution images, by flying lower, along with GPS positions, allowing for the many images to be stitched together and be orthorectified. The two methods are compared, each one proving to have certain benefits and short-comings. Seagrass beds are of special interest in Wales as features under the Wildlife and Countryside Act 1981 (as amended), a Section 42 habitat under the NERC Act (2006), a subfeature of Special Areas of Conservation under the Habitats Regulations and is a biological quality element (marine angiosperms) under the Water Framework Directive. As such, it is crucial that a reliable method of evaluating the quality (extent, density and species richness) of the seagrass beds is used. Traditionally, field observations are made, and records of the presence and extent derived from mapping using a GPS. Until recent years, the resolution of aerial photographs, taken from aircraft, has not been high enough to differentiate seagrass beds, unless they are particularly dense, with clearly defined edges. Many of the intertidal seagrass beds in Wales are patchy and of low density (5-50% cover) and cannot be identified reliably from 1:5,000 aerial photographs. This study uses an unmanned aerial vehicle to take higher resolution images, by flying lower, along with GPS positions, allowing for the many images to be stitched together and be orthorectified. The two methods are compared, each one proving to have certain benefits and short-comings. 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 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 sd">Species distribution Orthoimagery Environmental monitoring facilities Habitats and biotopes Habitats and biotopes Species distribution GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Traeth Lafan (Traeth Lavan) zostera noltii aerial surveys aerial photography (air photography) (aerial photographs) Menai Strait and Conwy Bay cSAC NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Macroalgae and seagrass taxonomy-related counts 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 . 5.0 English biota imageryBaseMapsEarthCover SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer; water column boundary layer Wales (WLS) -4.066666 -4.008333 53.221666 53.25 2012-10-05 2012-11-27 2 7 Brazier, D. P. 2013. Evaluating intertidal seagrass Zostera noltii beds –field survey vs remote sensing. CCW Marine Monitoring Report No: 103, pp 16 + v, Countryside Council for Wales, Bangor. Documents [A] Report Citation: Brazier, D. P. 2013. Evaluating intertidal seagrass Zostera noltii beds –field survey vs remote sensing. CCW Marine Monitoring Report No: 103, pp 16 + v, Countryside Council for Wales, Bangor. [B] GIS Data: TLafan 2012 Zos relocated.TAB and associated layers [C] Flight images in MapInfo and ArcMap and derived layers. [D] Images of the Zostera bed in the field. 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 These data are part of an annual program of monitoring of these particular seagrass beds from 2008 to 2012. These data are part of an annual program of monitoring of these particular seagrass beds from 2008 to 2012.