Water Turbidity Data and Macroalgal Depth Distributions on a Transect in the Menai Strait
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.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS109983
- Metadata Language
- English
- Lineage
-
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.
- Dataset Reference Date (Publication)
- 2001-06-30
Temporal Extent
- Begin date
- 1956-01-01
- End date
- 2001-12-31
- Topic category
-
- Environment
- Oceans
- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
-
benthic boundary layer
Vertical Extent
- Minimum value (metres)
- 0.02
- Maximum value (metres)
- 14.39
- Vertical CRS
Distribution
- Format Type and Description
-
-
Documents
(
)
- Specification
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[A] Report (MS Word) [B] Data (MS Excel), Data summaries (MS Word) [C] Tide table (Menaibr.txt)
-
Documents
(
)
Quality
Data quality
- Quality Scope
- Dataset
- Conformity
- 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
- Explanation
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
-
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.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
-
NRW Thesaurus
-
- meteorology (see also weather) (see also climate)
- marine and freshwater inventory
- marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments)
- turbidity
- algal depth distribution
- mussels
- algal community composition
- distribution patterns
- macroalgae
- Menai Strait
- critical light levels
- turbidity changes
- unionidae
- Type
- Theme
Citation
- Date (Publication)
- 2026-08-27
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
Analysis of water turbidity data and microalgal depth distributions on a transect in the Menai Strait
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© 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.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313039393833 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2026-09-28T11:41:37.593Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0