NRW_DS109983 eng dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T14:57:59 MEDIN 3.1.2 wel eng utf8 British National Grid (EPSG::27700) Water Turbidity Data and Macroalgal Depth Distributions on a Transect in the Menai Strait Water Turbidity Data and Macroalgal Depth Distributions on a Transect in the Menai Strait Data am gymylogrwydd dwr a dosbarthiadau dyfnder macroalgaidd ar drawslun yn afon Menai 2001-06-30 publication 4f4c4942-4343-5764-6473-313039393833 Presentation of data and analysis of patterns of water turbidity in the Menai Strait between 1961 and 1999 as well as depth distribution patterns of macroalgae (Telegraph Cable transect) at intervals from 1956 to 1999. Analysis of any relationship between the depth distribution of macroalgae and water turbidity patterns. The purpose of this data capture was to ascertain changes in turbidity and depth distribution patterns of macroalgae. Presentation of data and analysis of patterns of water turbidity in the Menai Strait between 1961 and 1999 as well as depth distribution patterns of macroalgae (Telegraph Cable transect) at intervals from 1956 to 1999. Analysis of any relationship between the depth distribution of macroalgae and water turbidity patterns. The purpose of this data capture was to ascertain changes in turbidity and depth distribution patterns of macroalgae. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en owner Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en custodian Nature Conservancy Council (NCC) c/o Natural Resources Wales, Maes Y Ffynnon, Penrhosgarnedd, Bangor, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresourceswales.gov.uk/splash?orig=/ originator 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=/ originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor notPlanned Environmental monitoring facilities theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme turbidity algal community composition unionidae macroalgae meteorology (see also weather) (see also climate) marine and freshwater inventory turbidity changes mussels critical light levels distribution patterns algal depth distribution Menai Strait marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments) theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Macroalgae generic abundance in water bodies theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations otherRestrictions © 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. vector eng utf8 environment oceans biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision benthic boundary layer NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -4.39612168 -4.0594318 53.06413221 53.29041941 1956-01-01 2001-12-31 0.02 14.39 Documents [A] Report (MS Word) [B] Data (MS Excel), Data summaries (MS Word) [C] Tide table (Menaibr.txt) dataset 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 publication This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Water Turbidity - Secchi disc readings were taken at Menai Bridge Pier by staff of the Marine Science Laboratories UCNW between 1961 and 1977. The Marine Science Laboratories UCNW recommenced measurements in February 1983.Water clarity (turbidity) measurements were recorded between January 1961 and early 1978. Recordings were resumed in January 1983, with a hiatus from late 1990 until mid 1992 and relatively sparse data from then on. No Secchi disc measurements were made between 1979 and 1982. Algal Depth Distribution - Transects along a disused telegraph cable. Knight-Jones and Nelson-Smith (1956) Hoare and Peattie (1979) and annually since 1983 (NCC). Macroalgal depth distributions were established from the results of a series of surveys of the 'Telegraph Cable' transect line across the Menai Strait. Surveys on the northern shore of the Strait were made in 1956 (3 stations); 1976 (12 stations); 1983 (12 stations); 1984 (60 stations); 1985-90; 1992; 1996; 1999 (72 stations); although since 1990 data has not been collected systematically from the near shore half of the transect (30 - 40 stations). Calculation of Critical Light Level Depths Z-values calculated Series of surveys carried out across the Menai Strait. Review of original surveys and annual NCC surveys to analyse changes in algal depth distribution and turbidity. Water Turbidity - Secchi disc readings were taken at Menai Bridge Pier by staff of the Marine Science Laboratories UCNW between 1961 and 1977. The Marine Science Laboratories UCNW recommenced measurements in February 1983.Water clarity (turbidity) measurements were recorded between January 1961 and early 1978. Recordings were resumed in January 1983, with a hiatus from late 1990 until mid 1992 and relatively sparse data from then on. No Secchi disc measurements were made between 1979 and 1982. Algal Depth Distribution - Transects along a disused telegraph cable. Knight-Jones and Nelson-Smith (1956) Hoare and Peattie (1979) and annually since 1983 (NCC). Macroalgal depth distributions were established from the results of a series of surveys of the 'Telegraph Cable' transect line across the Menai Strait. Surveys on the northern shore of the Strait were made in 1956 (3 stations); 1976 (12 stations); 1983 (12 stations); 1984 (60 stations); 1985-90; 1992; 1996; 1999 (72 stations); although since 1990 data has not been collected systematically from the near shore half of the transect (30 - 40 stations). Calculation of Critical Light Level Depths Z-values calculated Series of surveys carried out across the Menai Strait. Review of original surveys and annual NCC surveys to analyse changes in algal depth distribution and turbidity.