Survey of Invasive Non-Native Species (INNS) at Welsh dredge disposal sites: Milford Haven and the Severn Estuary 2018
Natural Resources Wales (NRW) contracted Marine Ecological Solutions Ltd. (Marine EcoSol) to analyse species and habitats surveyed in several dredge disposal sites around Wales (Milford Haven, the Severn Estuary, Swansea Bay Outer and Holyhead Deed), and undertake a data and literature review to discuss the potential for marine Invasive Non-Native Species (INNS) transfer via dredge disposal pathways. The purpose of the surveys was to obtain information to inform decision making to minimise further spread of non-native species from dredge disposal.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS122590
- Teitl Amgen
-
- NRW_INNS_dredge_disposal_survey_2018
- Laith Metadata
- English
- Datganiad
-
Towed underwater imagery was collected from dredge disposal sites Milford Haven 2 and 3 comprising video and stills. Grab and trawl samples were collected from Merkur Bouy, Cardiff Grounds and Newport. Marine EcoSol was contracted to analyse towed underwater imagery from the Milford Haven surveys. Video and stills imagery from Milford Haven were analysed for substrates and species (including any INNS), and their habitats classified using the JNCC Marine Habitat Classification system. Photographs of the epibenthic species collected from the Severn Estuary surveys were also re-checked for INNS. All data were entered Marine Recorder v5.4 under the survey name '2018 NRW INNS Dredge Disposal Survey'. Imagery was of varying quality, and small epibenthic trawks and grabs possibly insufficient to pick up the presence of INNS within dredge disposal sites. Methodological limitations are discussed within the associated report, Baldock et al. (2019).
- Gwybodaeth ychwanegol
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See Baldock, L., Moore, A., Wray, B., Evans, S. and E. Morris-Webb. 2019. Survey of Invasive Non-Native Species (INNS) at Welsh dredge disposal sites: Milford Haven and the Severn Estuary 2018. NRW Report.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2018-09-05
Rhychwant
Rhychwant
- Hyd
- Bridgwater Bay
- Hyd
- Celtic Sea
- Hyd
- Bristol Channel
- Hyd
- Severn Estuary
))
Maint Fertigol
- Maint allweddair MEDIN
-
circalittoral
Maint Fertigol
- Gwerth lleiaf
- 10.5
- Gwerth uchaf
- 76
- System Gyfeirio Cydlynu Fertigol
- urn:ogc:def:datum:EPSG::5100 Sea Level depth is unadjusted and does not take into account tidal height
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Database
()
- Math
-
Database 2018 NRW INNS Dredge Disposal Survey MRCCW325 NBNData.mdb Documents Baldock et al 2018 Dredge disposal Invasive Non-Native Species (INNS) monitoring report.docx 2018 Dredge Disposal INNS proforma R2.xlsx 2018 INNS Grab & Trawl Survey proforma_R1.xlsx Image Photographs and still images of the seabed
-
Database
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
Towed underwater imagery was collected from dredge disposal sites Milford Haven 2 and 3 comprising video and stills. Grab and trawl samples were collected from Merkur Bouy, Cardiff Grounds and Newport. Marine EcoSol was contracted to analyse towed underwater imagery from the Milford Haven surveys. Video and stills imagery from Milford Haven were analysed for substrates and species (including any INNS), and their habitats classified using the JNCC Marine Habitat Classification system. Photographs of the epibenthic species collected from the Severn Estuary surveys were also re-checked for INNS. All data were entered Marine Recorder v5.4 under the survey name '2018 NRW INNS Dredge Disposal Survey'. Imagery was of varying quality, and small epibenthic trawks and grabs possibly insufficient to pick up the presence of INNS within dredge disposal sites. Methodological limitations are discussed within the associated report, Baldock et al. (2019).
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
-
- dredging
- slipper limpet
- crepidula fornicata
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
Allweddair
- SeaDataNet Parameter Discovery Vocabulary
-
- Habitat characterisation
- Seabed photography
- Zoobenthos taxonomic abundance
- Math
- Theme
Dyfyniad
- Dyddiad (Adolygu)
- 2021-01-06
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 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. Attribution statement: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313232353930 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:22:35.654Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0