Monitro Cymuned Graean Lleidiog (IMX.VsenMtru) rhynglanwol yn ACA Pen Llyn a'r Sarnau yn 2004
The results of monitoring the extent and species richness of a distinct area of mixed sediment that lies east of Llanbedrog beach. The muddy gravel community is - IMX.VsenMtru (Venerupis senegalensis and Mya truncata in lower shore or infralittoral muddy gravel), and has a high biodiversity of epifauna, flora and infauna, due to the admixture of cobbles, pebbles, gravel, sand and mud. This provides many different habitat niches. The habitat is located within the Pen Llyn a'r Sarnau Special Area of Conservation (SAC) on the lower shore at Llanbedrog. In fully marine conditions on the lower shore, this habitat can be particularly species rich due to the complex nature of the substratum supporting a high diversity of infauna and epifauna, however many factors affect the habitat, physical disturbance, bait digging, organic enrichment, introduction of non-native species etc. The purpose of this data capture was to map the current extent of muddy gravel, define the character of the muddy gravel for in situ recognition, identify current known species composition and identify location for representative core sampling and Particle Size Analysis.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS102011
- Teitl Amgen
-
- 2004 CCW / IECS Pen Llyn a'r Sarnau SAC muddy gravel community (IMX.VsenMtru) monitoring (MRCCW3030000000B)
- Laith Metadata
- English
- Datganiad
-
Survey conducted on foot, working 2 hours either side of low water. The survey team identified and recorded species in situ where possible, samples were taken of any species that could not be immediately identified in the field for further analysis by experienced IECS benthic staff. Representative photos of the habitat were taken throughout the survey. A suitable location (representative of the overall nature of the biotope) was identified, and the position recorded for comparability of future surveys. At this five replicate core samples, each 10 cm diameter (0.0078 m2), and one sample for PSA were taken to establish infaunal biomass and sediment characteristics (January 2005). Distribution of IMX.VsenMtru previously mapped in the area during Phase 1 survey carried out by CCW in 1996.The extent of muddy gravel was mapped by walking around the biotope perimeter recording the boundary position with a portable dGPS. Notes were recorded in situ with respect to sediment characteristics and features of the biotope. Infaunal sample does not coincide with epibiota records. Epibiota recording of moderate confidence. Positional accuaracy of 1-5 m.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2008-12-31
Ystod amser
- Dyddiad cychwyn
- 2004-07-07
- Dyddiad gorffen
- 2005-01-31
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
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
-
Survey conducted on foot, working 2 hours either side of low water. The survey team identified and recorded species in situ where possible, samples were taken of any species that could not be immediately identified in the field for further analysis by experienced IECS benthic staff. Representative photos of the habitat were taken throughout the survey. A suitable location (representative of the overall nature of the biotope) was identified, and the position recorded for comparability of future surveys. At this five replicate core samples, each 10 cm diameter (0.0078 m2), and one sample for PSA were taken to establish infaunal biomass and sediment characteristics (January 2005). Distribution of IMX.VsenMtru previously mapped in the area during Phase 1 survey carried out by CCW in 1996.The extent of muddy gravel was mapped by walking around the biotope perimeter recording the boundary position with a portable dGPS. Notes were recorded in situ with respect to sediment characteristics and features of the biotope. Infaunal sample does not coincide with epibiota records. Epibiota recording of moderate confidence. Positional accuaracy of 1-5 m.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- Pen Llyn a'r Sarnau SAC
- Marine Recorder
- NI biotope Muddy gravel
- 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 monitoring of a muddy gravel community (VsenMtru) in Pen Llyn a'r Sarnau in 2004
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 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.
Datganiad Priodoli
- Cyfyngiadau eraill
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Math o Drwydded
- Cyfyngiadau eraill
- Open Government Licence
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313032303131 XML
- Laith Metadata
- English
- Dynodydd Rhiant
-
Across Wales Intertidal Monitoring Survey
NRW_DS109834
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2026-10-19T14:36:55.965Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0