Intertidal Survey Mapping (phase 1) from Pen-ychain to Criccieth, Pen Llyn a'r Sarnau Special Areas of Conservation (SAC) 2010

  • 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 purpose of this data capture was to conduct a habitat survey of the intertidal area from Pen-ychain to Criccieth Castle on the south coast of the Llyn Peninsula. This work supported the detailed SAC monitoring program by providing a more up to date baseline survey of the intertidal area. It provided CCW with information to help deal with current and future casework in relation to coastal defence, and reporting particularly regarding BAP habitats and species of conservation concern. One such Biodiversity Action Plan (BAP) habitat are the Sabellaria alveolata reefs which are formed by the honeycomb worm Sabellaria alveolata, a polychaete which constructs tubes in tightly packed masses with a distinctive honeycomb-like appearance. These reefs can be up to 30 or even 50 cm thick and take the form of hummocks, sheets or more massive formations. Reefs are mainly found on the bottom third of the shore, but may reach mean high water of neap tides and extend into the shallow subtidal in places. The current report aims to fill these knowledge gaps for the survey area. The purpose of this data capture is to update previous intertidal mapping in the area and to specifically provide an updated extent of honeycomb worm reef Sabellaria alveolata. The specific project aims were to identify natural temporal changes that have been witnessed since the original Phase 1 Intertidal Mapping Project in 1996-1997.

Identification

Dynodydd
Identifier
NRW_DS113087
Teitl Amgen
Alternative Title
  • Yr arolwg o'r ardal rynglanwol o Ben-ychain i Gastell Cricieth ar arfordir deheuol Pen Llyn
Laith Metadata
Metadata Language
English
Lineage

The fieldwork phase was completed in October 2010; dates chosen due to suitably timed Low Water on spring tides. The survey was conducted by staff from Marine Ecological Solutions Ltd. and support provided by the Intertidal Ecologist at CCW. Intertidal habitat mapping methodologies were used as described in Wyn et al (2006) and using the 2004 biotope classification described in Conner et al (2004). The area was first mapped in July 1996 as part of the 10 year long CCW Phase 1 Intertidal project, that mapped Intertidal habitats for the entire coastline of Wales.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2011-01-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Marine Ecological Solutions Ltd
Marine Ecological Solutions Ltd, 41 High Street, Menai Bridge, Ynys Mon, LL59 5EF, Wales
http://www.marine-ecosol.co.uk
 

Extent

Extent

Hyd
Geographic Extent
GWYNEDD - GWYNEDD
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
  • Geographic Information System ()

    Specification

    [A] Reports are held as pdf documents. [B] GIS data is held as MapInfo layers. [C] Photos are held as jpgs with accompanying photo log as excel spreadsheet. [D] Arcmap Feature Class

 

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

The fieldwork phase was completed in October 2010; dates chosen due to suitably timed Low Water on spring tides. The survey was conducted by staff from Marine Ecological Solutions Ltd. and support provided by the Intertidal Ecologist at CCW. Intertidal habitat mapping methodologies were used as described in Wyn et al (2006) and using the 2004 biotope classification described in Conner et al (2004). The area was first mapped in July 1996 as part of the 10 year long CCW Phase 1 Intertidal project, that mapped Intertidal habitats for the entire coastline of Wales.
 

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
  • intertidal
  • Phase 1 Habitat Survey
  • biotopes
  • Pen Llyn a'r Sarnau cSAC
  • sabellaria alveolata
  • polychaete worms
  • honeycomb worm
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
  • Habitat extent
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Intertidal survey mapping (phase 1) from Pen-ychain to Criccieth, Pen Llyn a'r Sarnau SAC
 

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

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

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW and © Crown copyright 2011. 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

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313133303837 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-12-09T12:37:33.57Z
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

Access the portal