Intertidal Monitoring of Rocky Reefs in Pembrokeshire Marine Special Area of Conservation (SAC) 2007
Pembrokeshire Marine Special Area of Conservation (SAC) is considered to be one of the best areas in the UK for marine reef habitats, a category within annex 1 of the Habitats Directive. This dataset comprises of the results of re-surveys of the six Milford Haven rocky intertidal transects first established in 2005, and the additional establishment of a similar transect at Nolton Haven in the north of Pembrokeshire. The purpose of this data capture was to repeat a set of six permanent monitoring sites representative of the rocky shore intertidal habitats within the Haven Waterway and last surveyed in 2005 and to present data on the current status of the sites. This data was also used to establish another site outside the Haven to the north at Nolton Haven.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS111176
- Alternative Title
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- Gwaith monitro rhynglanwol ar riffiau creigiog yn ACA Sir Benfro Forol yn 2007
- 2007 CCW/ASML Pembrokeshire SAC rocky reef monitoring MRCCW1630000000C
- Metadata Language
- English
- Lineage
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Fieldwork was carried out during five days of spring tides during 2007. A number of techniques used within the survey follow the same methodology as currently used within the MarClim monitoring programme and therefore are comparable to data from other sites around the Welsh coastline. The main surveys conducted were as follows: - Permanent quadrat recording: Relocated the six monitoring sites. At each site records were taken from upper, middle and lower shore heights, with four 1m x 1m quadrats relocated in each zone. Cell counts were made for conspicuous species. - Limpet counts and monitoring: Limpet abundance was recorded from 5 random cells within each quadrat. Up to 200 limpets were systematically selected within the middle zone at each site and the longest basal shell length of each was measured to construct population profiles. - Barnacle abundance: Percentage cover of barnacles was recorded from 5 random cells within each quadrat - Ascophyllum nodosum population structure: 50 Ascophyllum plants were randomly selected from the mid shore zone at Lawrenny Quay. The number of vesicles on the longest unbroken frond of each plant was recorded to provide an estimate of the average age of the plants on the shore.
- Dataset Reference Date (Publication)
- 2009-02-28
Temporal Extent
- Begin date
- 2007-08-13
- End date
- 2007-08-17
- Topic category
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- Oceans
- Biota
Extent
Extent
- Geographic Extent
- SIR BENFRO - PEMBROKESHIRE
Vertical Extent
- Medin Extent Keyword
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benthic boundary layer
Distribution
- Format Type and Description
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Database
Database
()
- 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: - Pemb Quadrat Data 2007 V2.xls [C] Marine Recorder file: MRCCW1630000000C [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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Database
Database
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Fieldwork was carried out during five days of spring tides during 2007. A number of techniques used within the survey follow the same methodology as currently used within the MarClim monitoring programme and therefore are comparable to data from other sites around the Welsh coastline. The main surveys conducted were as follows: - Permanent quadrat recording: Relocated the six monitoring sites. At each site records were taken from upper, middle and lower shore heights, with four 1m x 1m quadrats relocated in each zone. Cell counts were made for conspicuous species. - Limpet counts and monitoring: Limpet abundance was recorded from 5 random cells within each quadrat. Up to 200 limpets were systematically selected within the middle zone at each site and the longest basal shell length of each was measured to construct population profiles. - Barnacle abundance: Percentage cover of barnacles was recorded from 5 random cells within each quadrat - Ascophyllum nodosum population structure: 50 Ascophyllum plants were randomly selected from the mid shore zone at Lawrenny Quay. The number of vesicles on the longest unbroken frond of each plant was recorded to provide an estimate of the average age of the plants on the shore.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- Pembrokeshire Marine SAC
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- knotted wrack
- Special Areas of Conservation (SAC) - SAC monitoring
- intertidal
- Milford Haven
- reef
- bedrock
- rocky reef
- ascophyllum nodosum
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Habitat characterisation
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
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 2009 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
- 4f4c4942-4343-5764-6473-313131313736 XML
- Metadata Language
- English
- Parent Identifier
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Intertidal Monitoring of Rocky Reefs in Pembrokeshire Marine Special Area of Conservation (SAC) 2007-2010
NRW_DS115409
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:27:20.057Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0