Intertidal Monitoring of the Mawddach Estuary Biotopes in Pen Llyn a'r Sarnau Special Area of Conservation (SAC) 2004
Monitro Rhynglanwol: Biotopau Aber Mawddach yn ACA Pen Llyn a'r Sarnau 2004

  • English
  • wel
  • All

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. The Afon Mawddach (Mawddach estuary) is a small, drying, bar-built estuary, and it is one of the best examples of its type in the UK. With its mountainous catchment area, it has some of the lowest nutrient inputs of any estuary in Wales. For this reason, the Mawddach estuary has been included in the Pen Llyn a'r Sarnau marine Special Area of Conservation (SAC). The Mawddach estuary is predominantly a sandy/sandy mud estuary and contains communities characteristic of these conditions. The Institute of Estuarine and Coastal Studies (IECS) as part of the 2004 intertidal monitoring programme undertook a Phase 1 biotope survey of the Mawddach estuary following previous monitoring at the site. Specific aims of the survey included to carry out a Phase 1 biotope survey along predefined transects noting infaunal species and sediment characteristics, to digitally record photographic evidence along each transect and to assign biotopes to each of the sampling locations. This in turn would allow information to be provided on conservation objectives of the Pen Llyn a'r Sarnau SAC estuary feature.

Identification

Dynodydd
Identifier
NRW_DS102009
Teitl Amgen
Alternative Title
  • 2004 CCW / IECS Pen Llyn a'r Sarnau SAC Afon Mawddach biotope transects (MRCCW3020000000A)
Laith Metadata
Metadata Language
English
Lineage

Four transects positioned in the central section of the estuary were resurveyed. The transects were placed, two on each side of the river channel from the saltmarsh at the back of the shore to the river channel and thus traversing the fullest range and zonation of biotopes (from mud to muddy sand to sand). The original stakes, as previously used in the 1999 study, were located and the start position of each transect was noted. Survey techniques used by Wyn and Brazier, 2001 were implemented. This survey work builds on the CCW phase 1 survey of 1997 and initial trials using the same transects in 1999, as part of a LIFE project to evaluate monitoring methods (Sanderson et al. 2001).
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2008-12-31

Temporal Extent

Begin date
2004-07-08
End date
2004-07-08
 
Categori pwnc
Topic category
  • Biota
    Biota
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Countryside Council for Wales (CCW) -
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
Cychwynnwr
Originator
  Hull University. Institute Of Estuarine And Coastal Studies -
The University of Hull, Cottingham Road, Hull, HU6 7RX
http://www.hull.ac.uk/iecs/
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
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 ( Marine Recorder Online - Version 2.09.02 )

    Specification

    Marine Recorder

 

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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

Four transects positioned in the central section of the estuary were resurveyed. The transects were placed, two on each side of the river channel from the saltmarsh at the back of the shore to the river channel and thus traversing the fullest range and zonation of biotopes (from mud to muddy sand to sand). The original stakes, as previously used in the 1999 study, were located and the start position of each transect was noted. Survey techniques used by Wyn and Brazier, 2001 were implemented. This survey work builds on the CCW phase 1 survey of 1997 and initial trials using the same transects in 1999, as part of a LIFE project to evaluate monitoring methods (Sanderson et al. 2001).
 

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
  • Pen Llyn a'r Sarnau SAC
  • Mudflats and sandflats
  • Marine Recorder
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-10-19
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
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

NRW Related Title

Intertidal monitoring of the Mawddach Estuary : Pen Llyn a'r Sarnau SAC : 2004
 

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 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.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313032303039 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Across Wales Intertidal Monitoring Survey

NRW_DS109834
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-10-20T12:18:33.878Z
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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