Results of a Study into the Use of Transects to Identify the Broad-Scale Attributes of the Mawddach Estuary. (1999 CCW Marine Monitoring Trials)
The purpose of this data capture was to investigate the feasibility of using a transect based methodology to determine the proportion of muddy communities and the zonation of muddy communities from upper to lower shore. The Mawddach is one of the best examples of a small, drying, bar-built estuary in Britain and, with its mountainous catchment area it has some of the lowest nutrient inputs in Wales. In order to be able to report on the condition of the estuary a number of attributes have been identified which require monitoring. The aims of this project was to investigate the feasibility of using a transect based methodology to determine the proportion of muddy communities and the zonation of muddy communities from upper to lower shore.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS111144
- Alternative Title
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- The potential use of transects to provide an index of the borad-scale attributes of the Mawddach Estuary
- 1999 CCW Mawddach estuary littoral monitoring trial JNCCMNCR40000795
- Canlyniadau astudiaeth ar ddefnyddio trawsluniau i nodi priodoleddau aber Mawddach
- Metadata Language
- English
- Lineage
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Four transects were established to cover the majority of saltmarsh and intertidal biotopes present. Groups of core samples were collected at 25 m intervals along the transect. At each sample point sediment surface features and profile were described and photographed and the conspicuous species and morphological characteristics noted. The eight cores collected from each sample station were pooled and the infauna subsequently processed. The fauna present, identified to species level, were recorded on a spreadsheet as were the results of analysis of particle size characteristics of the granulomatric sample. The infaunal and granulometric data were then processed to identify the biotopes.
- Additional Information
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Senior Marine Monitoring Ecologist, Marine and Freshwater Science Group, NRW. This trialling work is a precursor to the intertidal monitoring carried out on the estuary in 2004 (see separate metadata entry) and is part of the LIFE trials, section 3.4.3 of the Monitoring Report. Sanderson, WG., Holt, RHF., Kay, L., yn, G., McMath, AJ. 2001. The establishment of a programme of surveillance and monitoring for judging the condition of the features of Pen Llyn a’r Sarnau cSAC: 1. Progress to March 2001. Countryside Council for Wales Science Report 380. Bangor.
- Dataset Reference Date (Publication)
- 2001-04-30
Temporal Extent
- Begin date
- 1999-09-25
- End date
- 1999-09-29
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
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Database
()
- Specification
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[A] Species data is held within Marine Recorder. [B] MNCR forms are held in hardcopy format. [C] The results are also presented in a hardcopy report format.
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Database
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Four transects were established to cover the majority of saltmarsh and intertidal biotopes present. Groups of core samples were collected at 25 m intervals along the transect. At each sample point sediment surface features and profile were described and photographed and the conspicuous species and morphological characteristics noted. The eight cores collected from each sample station were pooled and the infauna subsequently processed. The fauna present, identified to species level, were recorded on a spreadsheet as were the results of analysis of particle size characteristics of the granulomatric sample. The infaunal and granulometric data were then processed to identify the biotopes.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- Pen Llyn a'r Sarnau SAC
- Mawddach Estuary
- monitoring (see specific types of monitoring eg. woodland monitoring)
- transect (transects) (transect profile) (transect profiles)
- mud
- biotopes
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- Habitat extent
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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The establishment of a programme of surveillance and monitoring for judging the condition of the features of Pen Llyn a'r Sarnau cSAC : 1. Progress to March 2001
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW 2001 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.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313131313434 XML
- Metadata Language
- English
- Parent Identifier
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Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T12:39:28.447Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0