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Metadata: Water Turbidity Data and Macroalgal Depth Distributions on a Transect in the Menai Strait
Abstract:
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.
Data holder:
Natural Resources Wales (NRW)
Click on the red button for resource contact details:
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8632 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Water Turbidity Data and Macroalgal Depth Distributions on a Transect in the Menai Strait |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | NRW_DS109983 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313039393833 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 1956-01-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2001-12-31 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | 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. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | 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. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Environmental monitoring facilities |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | turbidity | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | algal community composition | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | unionidae | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | macroalgae | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | meteorology (see also weather) (see also climate) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | marine and freshwater inventory | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | turbidity changes | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | mussels | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | critical light levels | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | distribution patterns | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | algal depth distribution | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Menai Strait | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Macroalgae generic abundance in water bodies | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.29041941 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.0594318 |
| South | The southern-most limit of the data resource in decimal degrees | 53.06413221 |
| West | The western-most limit of the data resource in decimal degrees | -4.39612168 |
| Regional sea | benthic boundary layer | |
| Wales (WLS) | ||
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Nature Conservancy Council (NCC) | |
| Delivery point | c/o Natural Resources Wales, Maes Y Ffynnon, Penrhosgarnedd, Bangor, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresourceswales.gov.uk/splash?orig=/ | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Countryside Council for Wales (CCW) | |
| Delivery point | Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresourceswales.gov.uk/splash?orig=/ | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | This states any limitations on access to the data. Multiple occurences are allowed here. One entry shall be from the INSPIRE Metadata registry and the other free text should be part of the resource `Have specific limitations`. | There are no access restrictions on this data. NRW may release, publish or disseminate it freely. |
| no limitations | ||
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | © 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. |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Documents |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2001-06-30 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-03 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |