Monitoring of Yellow Trumpet Anemone Parazoanthus axinellae at Pen Cristen, Bardsey Island
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
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Dull adnabod
- Dynodydd
- NRW_DS110689
- Teitl Amgen
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- Monitro'r anemoni clystyrog melyn Parazoanthus axinellae ar Ynys Enlli
- An Assessment of appropriate methods for monitoring a population of colonial anemone at Bardsey Island
- Laith Metadata
- English
- Datganiad
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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
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- 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
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Documents
()
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[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.
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Documents
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- 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
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- parazoanthus axinellae
- yellow trumpet anemone
- Bardsey Island (Ynys Enlli)
- marine monitoring (see also marine surveys)
- Special Area of Conservation Monitoring
- Pen Llyn a'r Sarnau SAC
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
Allweddair
- SeaDataNet Parameter Discovery Vocabulary
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- Zoobenthos generic abundance
- Math
- Theme
Dyfyniad
- Dyddiad (Adolygu)
- 2021-01-06
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
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An assessment of appropriate methods for monitoring a population of colonial anemone at Bardsey Island (Ynys Enlli) Wales, UK
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Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313130363839 XML
- Laith Metadata
- English
- Dynodydd Rhiant
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Across Wales Diving Monitoring Project (2004)
NRW_DS109743
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-12-09T12:33:13.753Z
- Enw Safonol Metadata
- NRW
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1.0