Monitro'r anemoni clystyrog melyn Parazoanthus axinellae ar Ynys Enlli
Yellow trumpet anemone Parazoanthus axinellae is primarily a south-western species, found at Bardsey Island and is close to the northern boundary of its known distribution at this location. This species has been selected as an attribute for monitoring the condition of reefs in the Special Area of Conservation (SACs). In 1999 an assessment of appropriate methods was made to look at monitoring the abundance and population structure of Parazoanthus axinellae and the erect branching sponge Axinella dissimilis. The trials focused on comparing different techniques to find the one that was most repeatable and therefore sensitive to population change. Trials took place at Pen Cristen, on Bardsey Island. Subsequent monitoring of the Parazoanthus axinellae assemblage has occurred annually at this location when weather conditions allow. The purpose of this data capture was to monitor the numerical abundance, percentage cover and distribution of individuals within the dominant Parazoanthus axinellae assemblage using a quantitative photographic approach. This will contribute to condition assessment of the reef feature in the Pen Llyn a'r Sarnau SAC.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS110689
- Teitl Amgen
-
- An Assessment of appropriate methods for monitoring a population of colonial anemone at Bardsey Island
- Laith Metadata
- English
- Datganiad
-
The initial data was collected as part of the LIFE monitoring trials. Initial trials compared recording of quadrats by video and by still photography at one station at Pen Cristen. It was concluded that using still photography produced better, more repeatable results. Further details can be found in Marine Monitoring Report 2.The following standard procedure is now followed for data capture at Pen Cristen. 3 permanent stations have been set up, Notch face, Wrinkle face and Long face. These are marked with ring bolts around the perimeter. Divers string tape measures between the bolts in order to position a quadrat along the edge of the tape measure. A picture is taken of the sessile community within the quadrat. The quadrat is then moved to a position along the tape that overlaps the first quadrat by 100mm. The process is repeated to form a continuous photographic 'belt'. Further details can be found in Marine Monitoring report 25b, SOP 06. Images from each quadrat are analysed and the area covered by Parazoanthus recorded along with the number of polyps.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2011-12-31
Ystod amser
- Dyddiad cychwyn
- 1999-08-19
- Dyddiad gorffen
- 2011-12-31
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- Irish Sea
- Hyd
- Menai Strait
- Hyd
- Cardigan Bay
- Hyd
- Tremadog Bay
- Hyd
- GWYNEDD - GWYNEDD
))
Maint Fertigol
- Maint allweddair MEDIN
-
benthic boundary layer
Maint Fertigol
- Gwerth lleiaf
- 0
- Gwerth uchaf
- -20
- System Gyfeirio Cydlynu Fertigol
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Documents
(
)
- Math
-
[A] Reports in word and pdf format. [B] Raw data as Excel spreadsheets, [C] Videos as avi. Files, [D] Images files are held as jpgs and in some cases NEF format is also available.
-
Documents
(
)
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
-
The initial data was collected as part of the LIFE monitoring trials. Initial trials compared recording of quadrats by video and by still photography at one station at Pen Cristen. It was concluded that using still photography produced better, more repeatable results. Further details can be found in Marine Monitoring Report 2.The following standard procedure is now followed for data capture at Pen Cristen. 3 permanent stations have been set up, Notch face, Wrinkle face and Long face. These are marked with ring bolts around the perimeter. Divers string tape measures between the bolts in order to position a quadrat along the edge of the tape measure. A picture is taken of the sessile community within the quadrat. The quadrat is then moved to a position along the tape that overlaps the first quadrat by 100mm. The process is repeated to form a continuous photographic 'belt'. Further details can be found in Marine Monitoring report 25b, SOP 06. Images from each quadrat are analysed and the area covered by Parazoanthus recorded along with the number of polyps.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- marine monitoring (see also marine surveys)
- yellow trumpet anemone
- Pen Llyn a'r Sarnau SAC
- parazoanthus axinellae
- Special Area of Conservation Monitoring
- Bardsey Island (Ynys Enlli)
- 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
-
An assessment of appropriate methods for monitoring a population of colonial anemone at Bardsey Island (Ynys Enlli) Wales, UK
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 2011 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
- 4f4c4942-4343-5764-6473-313130363839 XML
- Laith Metadata
- English
- Dynodydd Rhiant
-
Across Wales Diving Monitoring Project (2004)
NRW_DS109743
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2026-09-28T14:06:37.734Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0