4f4c4942-4343-5764-6473-313135383938 English NRW_DS123035 Data Services Team Natural Resources Wales (NRW), Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ 2026-10-01T14:51:37.642Z NRW 1.0 wel utf8 British National Grid (EPSG::27700) Macrophyte Survey of Welsh Lakes 2014 Macrophyte Survey of Welsh Lakes 2014 Arolwg o Facroffytau Llynnoedd Cymru 2014 Macrophyte Survey of Welsh Lakes for Habitats Directive and Water Framework Directive Monitoring, 2014 Arolwg o Facroffytau Llynnoedd Cymru ar gyfer gwaith monitro’r Gyfarwyddeb Cynefinoedd a’r Gyfarwyddeb Fframwaith Dŵr (2014) 2015-03-31 NRW_DS115898 http://naturalresources.wales/ Natural Resources Wales (NRW) commissioned ECUS Ltd to collect and present ecological data from 25 lakes across eight local authority areas in Wales. The data were required to support NRW's integrated monitoring programme for the Water Framework Directive (WFD), protected sites including Special Areas of Conservation (SACs), Special Protection Areas (SPAs), and Sites of Special Scientific Interest (SSSIs), as well as other legislative and policy requirements. The lakes were selected for survey for a number of reasons: SAC: Monitoring of a Special Area of Conservation feature (Natura 2000 site). SSSI: Monitoring of a Site of Special Scientific Interest feature. WFD: Water Framework Directive surveillance network site. ND: Nitrates Directive monitoring site. Two notable species were recorded during the surveys. Floating water-plantain (Luronium natans), a European Protected Species, was recorded at seven lakes: Llyn Egnant, Llyn Gynon, Llyn Teifi, Llyn Cerrigllwydion Isaf, Gwnllyn, Llyn Padarn, and Llyn Tegid. All of these are known locations for the species. Starry stonewort (Nitellopsis obtusa), listed as Vulnerable on the UK Red List (JNCC, 2014), was recorded at Llangorse Lake. This represents only the second known record for Wales and a new record for this well-studied lake. Natural Resources Wales (NRW) commissioned ECUS Ltd to collect and present ecological data from 25 lakes across eight local authority areas in Wales. The data were required to support NRW's integrated monitoring programme for the Water Framework Directive (WFD), protected sites including Special Areas of Conservation (SACs), Special Protection Areas (SPAs), and Sites of Special Scientific Interest (SSSIs), as well as other legislative and policy requirements. The lakes were selected for survey for a number of reasons: SAC: Monitoring of a Special Area of Conservation feature (Natura 2000 site). SSSI: Monitoring of a Site of Special Scientific Interest feature. WFD: Water Framework Directive surveillance network site. ND: Nitrates Directive monitoring site. Two notable species were recorded during the surveys. Floating water-plantain (Luronium natans), a European Protected Species, was recorded at seven lakes: Llyn Egnant, Llyn Gynon, Llyn Teifi, Llyn Cerrigllwydion Isaf, Gwnllyn, Llyn Padarn, and Llyn Tegid. All of these are known locations for the species. Starry stonewort (Nitellopsis obtusa), listed as Vulnerable on the UK Red List (JNCC, 2014), was recorded at Llangorse Lake. This represents only the second known record for Wales and a new record for this well-studied lake. 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 Ecus Ltd Brook Holt, 3 Blackburn Road, Sheffield, South Yorkshire, S61 2DW contactus@ecusltd.co.uk http://www.ecusltd.co.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Hydrography Protected sites GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Llyn Conwy Llyn Gynon Llangorse Lake (llyn Safadden) Water Framework Directive (WFD) Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC) Llyn Idwal Llyn Idwal Llyn Maelog Llyn Tegid Llyn Padarn SSSI (Sites of Special Scientific Interest) NRW Thesaurus 2026-08-27 geonetwork.thesaurus.local.theme.converted_nrw-keywords There are no access restrictions to this data. NRW may release, publish or disseminate it freely no limitations © CNC/NRW, 2015. 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. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Open Government Licence English biota elevation environment SeaVoX Vertical Co-ordinate Coverages 2021-01-06 POWYS - POWYS SIR CEREDIGION - CEREDIGION CONWY - CONWY WRECSAM - WREXHAM GWYNEDD - GWYNEDD SIR YNYS MON - ISLE OF ANGLESEY -4.77004143 -2.65584056 51.73096158 53.45631467 2014-09-08 2014-11-21 Baxter, E, and Stewart, N. (2015), Macrophyte Survey of Welsh Lakes for Habitats Directive and Water Framework Directive Monitoring, 2014, Natural Resources Wales, NRW Evidence Report No: 52, 78pp. Binary Unknown Excel spreadsheet containing grid references; LEAFPACS spreadsheets in Excel format; Excel spreadsheet containing water quality depth profiles; Confidential spreadsheet containing landowner information Documents Unknown Maps in PDF format; Bathymetry maps in PDF format; Final report in Word and PDF formats Image Unknown JPEG images and accompanying Excel catalogue Geographic Information System Unknown GIS layers used to create bathymetry maps 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 Aquatic macrophyte surveys were undertaken at all 25 lakes using the JNCC Common Standards Monitoring Guidance and the WFD LEAFPACS2 survey methodology. LEAFPACS metrics were calculated from the survey data. Depth profiles of temperature and dissolved oxygen were collected at a single location within each lake, and observations of pressures and impacts affecting the lakes were recorded. Bathymetric surveys were completed for seven previously unsurveyed lakes, and the resulting data were analysed using GIS software. Aquatic macrophyte surveys were undertaken at all 25 lakes using the JNCC Common Standards Monitoring Guidance and the WFD LEAFPACS2 survey methodology. LEAFPACS metrics were calculated from the survey data. Depth profiles of temperature and dissolved oxygen were collected at a single location within each lake, and observations of pressures and impacts affecting the lakes were recorded. Bathymetric surveys were completed for seven previously unsurveyed lakes, and the resulting data were analysed using GIS software.