Impacts of bait collection on Welsh Marine Protected Areas (MPAs): Boulder Turning

Survey to assess the impacts of three bait collection methods on Welsh MPAs - bait digging (Sites : Angle Bay, Four Mile Bridge, Penmon - Beaumaris), boulder turning (Penmon-Beaumaris, West of Great Orme), crab shelters (Deganwy, Bangor Pier). Samples taken from control and impact sites. Infaunal cores, sediment cores, benthic megafauna (i.e. razor clam, cockle) quadrat, worm cast count, seagrass coverage, boulder epifauna, boulder turning classification.

This metadata covers the results of boulder turning monitoring at Penmon-Beaumaris and West of Great Orme.

Dynodydd: NRW_DS161480

Teitl Amgen

2024 NRW North Wales boulder turning survey (ef12b4e8-dae9-403a-9fcf-2cfde55f7e26)

Laith Metadata: English

Datganiad: Boulder turning monitoring was carried out at Penmon-Beaumaris and west of Great Orme between 10th and 13th March 2024. Survey methods used a comparative sampling strategy between areas that are exposed to boulder turning activities (i.e. impact) and areas that experience no boulder turning activities (i.e. control).

Suitable control areas were defined by minimal evidence of bait collection activities, comparable habitat types (e.g. sediments and algal coverage on boulders) and comparable shore heights (mid-low).

A transect sampling method was used to qualitatively assess the intensity and extent of boulder turning at each site. Four transects were placed horizontally (using a tape measure) across the mid (defined by the presence of Fucus vesiculosus) and low shore (defined by the presence of Fucus serratus), within each impact and control area at each site. Transects were 20 m in length and were spaced at least 20-50 m from each other. Along each transect the number of ‘suitable’ turned vs un-turned boulders (those that fitted through a 0.5 x 0.5 m quadrat and were not embedded in sediment), was counted and each boulder was assigned a classification (Very Recently Turned, Recently Turned, Historically Turned or Not Turned). In addition, five boulders per transect (within both control and impact areas) were analysed in-situ with 5 minutes assigned per boulder.

The information gathered included GPS location and boulder size; photographs of each boulder surface and faunal organisms observed on either surface.

Gwybodaeth ychwanegol: Gihwala, K.N., West, V.A., Frost, N.J, Robbins, K. 2024. Impacts of bait collection on Welsh Marine Protected Areas: Year two survey report. NRW Evidence Report, Report No: 862, 266pp, ABPmer, Southampton

Dyddiad cyfeirnod y set ddata (Creu): 2025-03-06

Dyddiad cyfeirnod y set ddata (Cyhoeddiad): 2026-01-15

Ystod amser

Dyddiad cychwyn: 2024-03-10

Dyddiad gorffen: 2024-03-13

Categori pwnc

Biota

Cychwynnwr

ABP Marine Environmental Research Ltd -

Suite B, Waterside House, Town Quay, Southampton, SO14 2AQ, England

http://www.abpmer.co.uk/

Perchennog

Natural Resources Wales (NRW) -

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

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

Rhychwant

Hyd: Wales (WLS)

Map representing the geographic extent of the dataset

Maint Fertigol

Maint allweddair MEDIN: littoral

Dosbarthiad

Fformat - Math a Disgrifiad

Database ( Unknown )

Math

Raw Survey Data
Documents ( Unknown )

Math

NRW Evidence Report in word or pdf format.

Lleolwr Adnoddau: Download and view data ( WWW:LINK-1.0-http--link )

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: Boulder turning monitoring was carried out at Penmon-Beaumaris and west of Great Orme between 10th and 13th March 2024. Survey methods used a comparative sampling strategy between areas that are exposed to boulder turning activities (i.e. impact) and areas that experience no boulder turning activities (i.e. control).

Suitable control areas were defined by minimal evidence of bait collection activities, comparable habitat types (e.g. sediments and algal coverage on boulders) and comparable shore heights (mid-low).

A transect sampling method was used to qualitatively assess the intensity and extent of boulder turning at each site. Four transects were placed horizontally (using a tape measure) across the mid (defined by the presence of Fucus vesiculosus) and low shore (defined by the presence of Fucus serratus), within each impact and control area at each site. Transects were 20 m in length and were spaced at least 20-50 m from each other. Along each transect the number of ‘suitable’ turned vs un-turned boulders (those that fitted through a 0.5 x 0.5 m quadrat and were not embedded in sediment), was counted and each boulder was assigned a classification (Very Recently Turned, Recently Turned, Historically Turned or Not Turned). In addition, five boulders per transect (within both control and impact areas) were analysed in-situ with 5 minutes assigned per boulder.

The information gathered included GPS location and boulder size; photographs of each boulder surface and faunal organisms observed on either surface.

Allweddair

GEMET - INSPIRE themes, version 1.0

Habitats and biotopes

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2008-06-01

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

Allweddair

NRW Thesaurus

marine protected areas(marine consultation areas)(sensitive marine areas)seealso marine conservation&marine nature reserve
boulders

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2025-01-08

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

Allweddair

SeaDataNet Parameter Discovery Vocabulary

Zoobenthos taxonomic abundance

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2024-06-19

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

Cod: WGS 84 (EPSG:4326)

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Math o Gyfyngiad: Other restrictions

Cyfarwyddeb Cyfyngiadau Mynediad

Cyfyngiadau: noLimitations

Testun cyfyngiadau mynediad

Cyfyngiadau eraill: There are no access restrictions on 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

Math o Drwydded

Cyfyngiadau eraill: Open Government Licence

Metadata

Dynodydd Ffeil: 4f4c4942-4343-5764-6473-313631343830 XML

Laith Metadata: English

Dynodydd Rhiant: Impacts of bait collection on Welsh Marine Protected Areas (MPAs)
NRW_DS161478

Math o adnodd: Dataset

Dyddiad Metadata: 2026-01-15T14:31:26.216Z

Enw Safonol Metadata: NRW

Fersiwn Metadata: 1.0

Pwynt Cyswllt

Natural Resources Wales -

Maes y Ffynnon , Bangor , LL57 2DW , Wales

Corff Cyhoeddi

Mynediad i'r Porth

Mynediad llawn i'r porth a'r metadata.

Impacts of bait collection on Welsh Marine Protected Areas (MPAs): Boulder Turning

Dull adnabod

Ystod amser

Rhychwant

Rhychwant

Maint Fertigol

Dosbarthiad

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

Datganiad Priodoli

Math o Drwydded

Metadata

Metadata

Corff Cyhoeddi