Intertidal Monitoring of Rocky Reefs in Pembrokeshire Marine Special Area of Conservation (SAC) 2007

  • English
  • wel
  • All

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

Dynodydd
Identifier
NRW_DS111176
Teitl Amgen
Alternative Title
  • Gwaith monitro rhynglanwol ar riffiau creigiog yn ACA Sir Benfro Forol yn 2007
  • 2007 CCW/ASML Pembrokeshire SAC rocky reef monitoring MRCCW1630000000C
Laith Metadata
Metadata Language
English
Lineage

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.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2009-02-28
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Aquatic Survey and Monitoring Ltd (ASML)
Whitfield Brow, Bollihope, Frosterley, Weardale, Co. Durham, DL13 2SZ, England
http://www.marineseen.com/aquatic_survey_and_monitoring.htm
 

Extent

Extent

Hyd
Geographic Extent
SIR BENFRO - PEMBROKESHIRE
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
benthic boundary layer
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Database ()

    Specification

    [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

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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
Degree
false
Lineage

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

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • 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
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Habitat characterisation
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Adolygu)
Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions to this data. NRW may release, publish or disseminate it freely
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© 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

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313131313736 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Intertidal Monitoring of Rocky Reefs in Pembrokeshire Marine Special Area of Conservation (SAC) 2007-2010

NRW_DS115409
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-12-09T12:39:18.272Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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