Intertidal Monitoring of Sediment Flats in Menai Strait and Conwy Bay Special Area of Conservation (SAC) in 2008

Menai Strait and Conwy Bay Special Area of Conservation (SAC) is designated for five Annex 1 habitats: Sandbanks which are slightly covered by sea water all the time, Mudflats and sandflats not covered by seawater at low tide, Reefs, Large shallow inlets and bays and Submerged or partially submerged sea caves. Of these mudflats, sandflats and reefs are the main habitats of interest within intertidal areas of Menai Strait and Conwy Bay SAC. Conservation objectives for these habitats are given in the Regulation 33 advice for the SAC. The overriding objective of the survey was to establish the reference condition for the Menai Strait and Conwy Bay SAC and develop monitoring stations for recording the level of natural change. This would enable the development of conservation objectives for the appropriate management of the features of the SAC.

Dynodydd: NRW_DS112290

Teitl Amgen

2008 CCW / ASML Menai Strait and Conwy Bay SAC Foryd Bay survey MRCCW16300000019
Gwaith monitro rhynglanwol ar wastadeddau gwaddodion yn ACA Y Fenai a Bae Conwy yn 2008

Laith Metadata: English

Datganiad: The Grid Maker tool in the MapInfo GIS package was used to create a grid of 47 stations across the defined survey area, with a north-south distance of 200 m between points and an east-west distance of 330 m. This gave the most appropriate coverage of the flats to enable sampling of the range of biotopes on the Phase 1 map with the manpower available. On site, each survey pair was allocated a section of the grid to survey and GPS units were used to navigate to each station in turn. Where possible, a single 0.01 m2 core sample was taken at each survey station. If the station happened to lie on a rocky outcrop, in a drainage channel or in a pool greater than ~5 cm deep, then a core sample was not taken. The core sample was sieved using a 0.5 mm mesh sieve in a nearby pool. The contents of the sieve were then inspected closely, with the aid of a magnifying glass. All visible animals were identified and counted, to the extent achievable, by the most experienced surveyor in the pair. Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC between 1999 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Considerable historical data exists on the intertidal habitats and communities present at many sites in the SAC, including Y Foryd, Traeth Lafan and the tide-swept boulder shores of the Menai Strait. Methodological trials and surveys, designed for the purposes of SAC monitoring, have been carried out in recent years. Of particular relevance to this report are the surveys of tide-swept boulder biotopes at sites on the Menai Strait (Boyes and Allen 2004, Mazik et al. 2005) and a report of boulder monitoring stations established by ASML/CCW in 2007 (Moore 2008), and a survey of the Zostera noltii bed in Y Foryd (Boyes, Proctor and Mitchell 2004). All survey completed by professional and experienced marine field surveyors. Data quality and confidence considered high.

Dyddiad cyfeirnod y set ddata (Cyhoeddiad): 2010-06-30

Ystod amser

Dyddiad cychwyn: 2008-06-02

Dyddiad gorffen: 2008-06-06

Categori pwnc

Biota

Perchennog

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Cychwynnwr

CCW Marine Monitoring Team

Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Cychwynnwr

Aquatic Survey and Monitoring Ltd (ASML)

Whitfield Brow, Bollihope, Frosterley, Weardale, Co. Durham, DL13 2SZ, England

http://www.marineseen.com/aquatic_survey_and_monitoring.htm

Rhychwant

Hyd: SIR YNYS MON - ISLE OF ANGLESEY

Map representing the geographic extent of the dataset

Maint Fertigol

Maint allweddair MEDIN: benthic boundary layer

Fformat - Math a Disgrifiad

Documents Documents ()

Math

[A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] Excel spreadsheets of data - MS and CB 2008 Foryd Bay Data V2.xls. Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats [C] Marine Recorder file. [D] A series of MapInfo GIS layers in MapInfo Native format (Tables) MS and CB 2008 Core Sample Details.Tab and MS and CB 2008 Foryd Bay Data V2.Tab [E] Photographs of the site, stations and core contents.

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
Gradd: false

Datganiad: The Grid Maker tool in the MapInfo GIS package was used to create a grid of 47 stations across the defined survey area, with a north-south distance of 200 m between points and an east-west distance of 330 m. This gave the most appropriate coverage of the flats to enable sampling of the range of biotopes on the Phase 1 map with the manpower available. On site, each survey pair was allocated a section of the grid to survey and GPS units were used to navigate to each station in turn. Where possible, a single 0.01 m2 core sample was taken at each survey station. If the station happened to lie on a rocky outcrop, in a drainage channel or in a pool greater than ~5 cm deep, then a core sample was not taken. The core sample was sieved using a 0.5 mm mesh sieve in a nearby pool. The contents of the sieve were then inspected closely, with the aid of a magnifying glass. All visible animals were identified and counted, to the extent achievable, by the most experienced surveyor in the pair. Phase 1 surveys of intertidal habitats in the SAC were carried out in the SAC between 1999 and 2003 (Brazier et al. 2007), providing detailed mapping of the intertidal biotopes with some information on characterizing species. Considerable historical data exists on the intertidal habitats and communities present at many sites in the SAC, including Y Foryd, Traeth Lafan and the tide-swept boulder shores of the Menai Strait. Methodological trials and surveys, designed for the purposes of SAC monitoring, have been carried out in recent years. Of particular relevance to this report are the surveys of tide-swept boulder biotopes at sites on the Menai Strait (Boyes and Allen 2004, Mazik et al. 2005) and a report of boulder monitoring stations established by ASML/CCW in 2007 (Moore 2008), and a survey of the Zostera noltii bed in Y Foryd (Boyes, Proctor and Mitchell 2004). All survey completed by professional and experienced marine field surveyors. Data quality and confidence considered high.

Allweddair

GEMET - INSPIRE themes, version 1.0

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2008-06-01

Cod: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair

NRW Thesaurus

intertidal
sediment flats
eelgrass
zostera marina
zostera angustifolia
zostera
seagrasses (see also potamogetonaceae and hydrocharitaceae)
Infauna

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2023-12-31

Cod: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair

SeaDataNet Parameter Discovery Vocabulary

Zoobenthos generic abundance
Zoobenthos taxonomy-related counts
Habitat extent

Math: Theme

Dyfyniad

Dyddiad (Adolygu): 2021-01-06

Cod: geonetwork.thesaurus.external.theme.rdf+xml

Cod: British National Grid (EPSG::27700)

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Teitlau cysylltiedig CNC: Intertidal SAC monitoring Menai Strait and Conwy Bay SAC : June 2009

Teitlau cysylltiedig CNC: Intertidal SAC monitoring Menai Strait and Conwy Bay SAC June 2008

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.

Metadata

Dynodydd Ffeil: 4f4c4942-4343-5764-6473-313132323930 XML

Laith Metadata: English

Dynodydd Rhiant: Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501

Math o adnodd: Dataset

Dyddiad Metadata: 2024-05-31T09:40:25.046Z

Enw Safonol Metadata: NRW

Fersiwn Metadata: 1.0

Pwynt Cyswllt

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Corff Cyhoeddi

Mynediad i'r Porth

Mynediad llawn i'r porth a'r metadata.

Intertidal Monitoring of Sediment Flats in Menai Strait and Conwy Bay Special Area of Conservation (SAC) in 2008

Dull adnabod

Ystod amser

Rhychwant

Rhychwant

Maint Fertigol

Dosbarthiad

Ansawdd

Ansawdd Data

Allweddeiriau

Allweddair

Dyfyniad

Allweddair

Dyfyniad

Allweddair

Dyfyniad

System Cyfeirio Gofodol

Cynnwys

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Cyfyngiadau

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Cyfarwyddeb Cyfyngiadau Mynediad

Testun cyfyngiadau mynediad

Defnyddiwch gyfyngiadau

Metadata

Metadata

Corff Cyhoeddi