Gwaith monitro rhynglanwol ar riff Sabellaria yn ACA Bae Ceredigion yn 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) was therefore required to report on a regular basis on whether features are in favourable conservation status.
Honeycomb reef worm Sabellaria alveolata is a sedentary, tube-dwelling polychaete most commonly found on rocky substrata in the lower shore and shallow subtidal zones of marine and estuarine areas. The honeycomb reef worm is a UK BAP Priority Habitat (BAP habitats are now Habitats of Principal Importance/Priority Habitats).
Cardigan SAC is designated for a number of features, including Bottlenosed dolphins, Sandbanks, Reefs and Sea Caves, and some intertidal features including areas of bedrock and boulder/cobble habitats and many areas are characterised by biogenic reef formed by the honeycomb reef worm Sabellaria alveolata.
This dataset includes the results of a survey of the biogenic reef formed by the honeycomb reef worm Sabellaria alveolata at two sites within Cardigan Bay SAC. The purpose of this data capture was to establish sites for long term monitoring and collect baseline/reference data using appropriate methods. This is a high quality survey carried out by an experienced team of marine biologists.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS111178
- Teitl Amgen
-
- 2007 CCW/ASML Cardigan Bay SAC Sabellaria reef monitoring (MRCCW16300000002)
- Laith Metadata
- English
- Datganiad
-
Methodology used was a modified version of the transect survey methodology developed for Pen Llyn a'r Sarnau SAC (2008).
Existing maps of Sabellaria extent were used to define the survey area within which a series of 11 transects were drawn at 50 m intervals approximately perpendicular to the coastline.
Along each transect notes were made on habitat, community and condition/age of Sabellaria reef. Photographs were also taken to illustrate habitat and condition of the reef.
1 or 2 stations were used per transect for quadrat surveys. At each survey station a gridded 0.25m2 quadrat was placed randomly 15 times within a radius of 10m.
Digital photographs were taken of each quadrat and a full survey was carried out on the first 5 quadrats to record % cover of standing water, total Sabellaria and live Sabellaria, key species/taxa, other typical fauna and flora. The other 10 quadrats were used to carry out additional recording of Sabellaria cover.
The extent of the reef was mapped using the track function of handheld GPS units.
Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC in 1996 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Surveys of Sabellaria reefs in the SAC were carried out for CCW in 2004 (Boyes et al. 2008). Additional mapping of Sabellaria reef extent at Aberaeron was carried out by CMACS Ltd. (sub-contracted by Atkins Ltd.) in August 2006 as part of an Environmental Assessment for proposed Aberaeron North Beach Coastal Defence Work (unpublished data provided by Atkins Ltd.).
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2025-06-10
Ystod amser
- Dyddiad cychwyn
- 2007-05-14
- Dyddiad gorffen
- 2007-05-18
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- SIR CEREDIGION - CEREDIGION
))
Maint Fertigol
- Maint allweddair MEDIN
-
benthic boundary layer
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Database
(
Marine Recorder Online - Version 2.09.02
)
- Math
-
Marine Recorder
-
Database
(
Marine Recorder Online - Version 2.09.02
)
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Cydymffurfiad
- 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
- Eglurhad
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
Methodology used was a modified version of the transect survey methodology developed for Pen Llyn a'r Sarnau SAC (2008).
Existing maps of Sabellaria extent were used to define the survey area within which a series of 11 transects were drawn at 50 m intervals approximately perpendicular to the coastline.
Along each transect notes were made on habitat, community and condition/age of Sabellaria reef. Photographs were also taken to illustrate habitat and condition of the reef.
1 or 2 stations were used per transect for quadrat surveys. At each survey station a gridded 0.25m2 quadrat was placed randomly 15 times within a radius of 10m.
Digital photographs were taken of each quadrat and a full survey was carried out on the first 5 quadrats to record % cover of standing water, total Sabellaria and live Sabellaria, key species/taxa, other typical fauna and flora. The other 10 quadrats were used to carry out additional recording of Sabellaria cover.
The extent of the reef was mapped using the track function of handheld GPS units.
Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC in 1996 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Surveys of Sabellaria reefs in the SAC were carried out for CCW in 2004 (Boyes et al. 2008). Additional mapping of Sabellaria reef extent at Aberaeron was carried out by CMACS Ltd. (sub-contracted by Atkins Ltd.) in August 2006 as part of an Environmental Assessment for proposed Aberaeron North Beach Coastal Defence Work (unpublished data provided by Atkins Ltd.).
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- Cardigan Bay SAC
- Sabellaria reef detail
- Sabellaria reef wide scale
- Marine Recorder
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2026-08-27
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2024-06-19
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
-
Intertidal SAC monitoring Cardigan Bay SAC May 2007
- Teitlau cysylltiedig CNC
-
Intertidal SAC monitoring Cardigan Bay SAC May 2008
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© 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.
Datganiad Priodoli
- Cyfyngiadau eraill
-
© 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.
Math o Drwydded
- Cyfyngiadau eraill
- Open Government Licence
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313131313738 XML
- Laith Metadata
- English
- Dynodydd Rhiant
-
Across Wales Intertidal Monitoring Survey
NRW_DS109834
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2026-10-19T09:05:35.052Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0