Intertidal Monitoring of Sediment Transects in Carmarthen Bay and Estuaries Special Area of Conservation (SAC) 2007
The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. Between 1999 and 2001, the Countryside Council for Wales (CCW) undertook a Phase 1 biotope mapping survey of the intertidal areas of the Carmarthen Bay and Estuaries Special Area of Conservation (SAC). This dataset includes the results of surveys of the biotopes present along eight transects around Carmarthen Bay. Thirteen transects had been surveyed with a very similar methodology in 2005. This survey repeated one of those transects and established seven new transects. The purpose of this data capture was to provide sufficient information to identify the biotopes present and describe the composition of the communities; and to establish sites for long-term monitoring and collect baseline/reference data using appropriate methods.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS111181
- Alternative Title
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- Gwaith monitro rhynglanwol ar drawsluniau gwaddodion yn ACA Bae Caerfyrddin ac Aberoedd yn 2007
- 2007 CCW/ASML Carmarthen Bay and Estuaries SAC transect monitoring MRCCW16300000007
- Metadata Language
- English
- Lineage
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A modified version of standard Marine Nature Conservation Review (MNCR) Phase 2 methodology was utilised. 20 transects (13 surveyed initially in 2005 and seven surveyed for the first time in 2007) were pre-selected by CCW to represent the variety of sediment biotopes present. Using handheld GPS the surveyors walked down the transect lines making notes on substrata/habitats and deciding how many biotopes were present. A GPS fix was taken at a station position within each of those biotopes which was considered to best represent the biotope. One or more (max 3) of the sediment stations were selected for quantitative core sampling (usually biotopes most vulnerable to change from anthropogenic activity and which represented a significant portion of the transect). Five core samples were taken from each of the selected sampling stations for macrofauna and granulometry analyses and a site description and photograph were taken at each station. Two in-situ bivalve count methodologies were also trialled opportunistically during the surveys of 4 transects- an estimation of the numbers of Scrobicularia plana and an estimate of the densities of Cerastoderma edule, Macoma balthica and Angulus tenuis. Between 1999 and 2001, the Countryside Council for Wales (CCW) undertook a Phase 1 biotope mapping survey (Wyn et al. 2006) of the intertidal areas of the Carmarthen Bay and Estuaries Special Area of Conservation (SAC).
- Dataset Reference Date (Publication)
- 2009-03-31
Temporal Extent
- Begin date
- 2007-06-11
- End date
- 2007-06-15
- Topic category
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- Oceans
- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
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benthic boundary layer
Distribution
- Format Type and Description
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Documents
Documents
()
- Specification
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[A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] Excel Spreadsheets of data: CarmarthenBayData_forMarineRecorder_v6.xls [C] Marine Recorder file: MRCCW16300000007 [D] A series of MapInfo GIS layers in MapInfo Native format (Tables). Translations from the MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [E] Photos
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Documents
Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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A modified version of standard Marine Nature Conservation Review (MNCR) Phase 2 methodology was utilised. 20 transects (13 surveyed initially in 2005 and seven surveyed for the first time in 2007) were pre-selected by CCW to represent the variety of sediment biotopes present. Using handheld GPS the surveyors walked down the transect lines making notes on substrata/habitats and deciding how many biotopes were present. A GPS fix was taken at a station position within each of those biotopes which was considered to best represent the biotope. One or more (max 3) of the sediment stations were selected for quantitative core sampling (usually biotopes most vulnerable to change from anthropogenic activity and which represented a significant portion of the transect). Five core samples were taken from each of the selected sampling stations for macrofauna and granulometry analyses and a site description and photograph were taken at each station. Two in-situ bivalve count methodologies were also trialled opportunistically during the surveys of 4 transects- an estimation of the numbers of Scrobicularia plana and an estimate of the densities of Cerastoderma edule, Macoma balthica and Angulus tenuis. Between 1999 and 2001, the Countryside Council for Wales (CCW) undertook a Phase 1 biotope mapping survey (Wyn et al. 2006) of the intertidal areas of the Carmarthen Bay and Estuaries Special Area of Conservation (SAC).
Keywords
Keywords
Keywords
- NRW Thesaurus
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- Carmarthen Bay
- Carmarthen Bay and Estuaries SAC
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- Special Areas of Conservation (SAC) - SAC monitoring
- intertidal
- sediments
- transect (transects) (transect profile) (transect profiles)
- cerastoderma edule (previously known as cardium edule)
- cockles
- peppery furrow shell
- scrobicularia plana
- baltic tellin
- macoma balthica
- thin tellin
- angulus tenuis
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Zoobenthos generic abundance
- Zoobenthos taxonomic abundance
- Habitat characterisation
- 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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Intertidal SAC monitoring Carmarthen Bay and Estuaries SAC June 2007
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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The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions).
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW and © Crown copyright 2009. All rights reserved. Natural Resources Wales, AC0000849444 Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination in any format or medium but only for non-commercial purposes, according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313131313831 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
- 2024-05-31T09:40:11.081Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0