Monitro cymunedau sbwng a ysgubir gan y llanw yn Afon Menai a Sir Benfro
Sponges are an important component of benthic communities in temperate waters and can become dominant in suitable conditions.
Monitoring takes place at 2 sites within the Menai Strait; Coleg Normal and Nelson's Column and at one site in the Milford Haven (Warrior), Pembrokeshire. Sponge communities in the Menai Strait are dominated by large, relatively fast-growing species, such as Halichondria panicea, Esperiopsis fucorum and Haliclona oculata which thrive in rapid flowing turbid waters.
The purpose of this data capture was to record the abundance and 'luxuiousness' of the sponge communities to in order to give an indication of the favourable conservation status of benthic communities within the Special Areas of Conservation (SACs).
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS111134
- Teitl Amgen
-
- Monitoring of sponge communities at Warrior, Pembrokeshire
- Monitoring of sponges at Nelson's Column
- Monitoring of sponge communities at Coleg Normal
- Laith Metadata
- English
- Datganiad
-
Methods at the sites differ due to physical conditions (current and duration of slack water). Transects are marked out at both sites.
At Coleg Nomal and Warrior the depth of the sponge crust along with presence/absence of key sponge species is recorded at 0.5m intervals. Where erect sponge species are found within 150mm of the transect the species and height of the sponge is noted as well as the circumference. This is carried out within a 'deep' and 'shallow' zone.
At Nelsons Columns a diver swims the length of the transect filming the seabed and conspicuous species and communities. The video is used to describe the habitat and specify species. In addition 0.3x0.3m quadrats are placed at 2m intervals along the transect and the quadrat photographed. Photos are taken and archived as a record of the community and may be analysed in future.
Detailed methodologies and descriptions can be found in Marine Monitoring Report 25b (standard operating procedures 3 and 5). Additional monitoring is carried out at the Warrior site (please see the Pembrokeshire Marine SAC reef monitoring metadata entry).
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2010-12-31
Ystod amser
- Dyddiad cychwyn
- 2004-07-14
- Dyddiad gorffen
- 2010-12-31
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- Cardigan Bay
- Hyd
- St. Brides Bay
- Hyd
- Irish Sea
- Hyd
- Celtic Sea
- Hyd
- SIR BENFRO - PEMBROKESHIRE
- Hyd
- SIR YNYS MON - ISLE OF ANGLESEY
))
Maint Fertigol
- Maint allweddair MEDIN
-
benthic boundary layer
Maint Fertigol
- Gwerth lleiaf
- -1
- Gwerth uchaf
- -14
- System Gyfeirio Cydlynu Fertigol
Dosbarthiad
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Documents
(
Unknown
)
- Math
-
Sponge thickness and presence/absence data, and video transcriptions held in Word documents.
-
Delimited
(
Unknown
)
- Math
-
Excel spreadsheets (NRW generally uses Delimited for tabular spreadsheet data where there isn't a specific spreadsheet option).
-
Image
(
Unknown
)
- Math
-
JPG images.
-
Movie
(
Unknown
)
- Math
-
Mini DV tapes and AVI video files.
-
Documents
(
Unknown
)
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
-
Methods at the sites differ due to physical conditions (current and duration of slack water). Transects are marked out at both sites.
At Coleg Nomal and Warrior the depth of the sponge crust along with presence/absence of key sponge species is recorded at 0.5m intervals. Where erect sponge species are found within 150mm of the transect the species and height of the sponge is noted as well as the circumference. This is carried out within a 'deep' and 'shallow' zone.
At Nelsons Columns a diver swims the length of the transect filming the seabed and conspicuous species and communities. The video is used to describe the habitat and specify species. In addition 0.3x0.3m quadrats are placed at 2m intervals along the transect and the quadrat photographed. Photos are taken and archived as a record of the community and may be analysed in future.
Detailed methodologies and descriptions can be found in Marine Monitoring Report 25b (standard operating procedures 3 and 5). Additional monitoring is carried out at the Warrior site (please see the Pembrokeshire Marine SAC reef monitoring metadata entry).
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- Amphilectus fucorum
- Menai Strait and Conwy Bay SAC
- Mermaid's glove
- Nelson's Column
- marine monitoring (see also marine surveys)
- Pembrokeshire Marine SAC
- breadcrumb sponge
- Coleg Normal
- porifera
- Microciona sp.
- Halichondria panicea
- Sponge communities
- sponges
- Esperiopsis fucorum
- Haliclona oculata
- Shredded carrot sponge
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2026-08-27
Allweddair
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
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
-
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
- 4f4c4942-4343-5764-6473-313131313334 XML
- Laith Metadata
- English
- Dynodydd Rhiant
-
Across Wales Diving Monitoring Project (2004)
NRW_DS109743
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2026-09-30T09:04:59.407Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0