4f4c4942-4343-5764-6473-313133343435
eng
dataset
Natural Resources Wales (NRW)
0300 065 3000
Maes-y-Ffynnon
LL57 2DW
enquiries@naturalresourceswales.gov.uk
pointOfContact
2021-09-15
MEDIN Discovery Metadata Standard
Version 2.3.8
urn:ogc:def:crs:EPSG::BNG
OGP
Modelling the Predicted Spread of a Carpet Sea Squirt ( Didemnum vexillum ) around the Welsh Coast (2011)
Modelu lledaeniad disgwyliedig Didemnum vexillum o amgylch arfordir Cymru 2011
2011-01-28
publication
2011-01-28
revision
113445
https://naturalresources.wales
Didemnum vexillum is an invasive sea squirt that is not native to UK shores. It was first detected in Europe in 1991 and has since spread to several countries (including France, Ireland and the UK). The species has been located in Wales, Scotland and England and there is concern D. vexillum may have negative impacts on biodiversity and shellfish interests. Predicting the spread of an invasive species is crucial when assessing possible management actions. The potential impacts of the species on both biodiversity and commercial interests need to be studied and a cost-benefit approach taken to decide on the best course of management for that species. Predicting the spread of an invasive species is crucial when assessing possible management actions. The potential impacts of the species
on both biodiversity and commercial interests need to be studied and a cost-benefit approach taken to decide on the best course of management for that species. Geographic Information System (GIS) offers a fast, efficient way to map this predicted spread. The results of this mapping can then be used to focus on areas where D. vexillum may conflict with conservation and commercial interests.
Natural Resources Wales (NRW)
0300 065 3000
Maes-y-Ffynnon
LL57 2DW
enquiries@naturalresourceswales.gov.uk
custodian
Countryside Council for Wales (CCW)
0300 065 3000
Countryside Council for Wales
Maes y Ffynnon
LL57 2DW
enquiries@naturalresourceswales.gov.uk
originator
SeaZone
0870 013 0607
OX10 8BA
info@SeaZone.com
originator
Natural England
0300 060 2745
Foundry House
S3 8NH
enquiries@naturalengland.org.uk
originator
notPlanned
Geographic Information System
Species distribution
GEMET - INSPIRE themes, version 1.0
2022-02-05
publication
Temperature of the water column
Salinity of the water column
SeaDataNet Parameter Discovery Vocabulary
2011-03-25
publication
Marine Environmental Data and Information Network
© CNC/NRW 2011 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.
otherRestrictions
There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
eng
environment
biota
ISO3166 Countries
2022-02-05
publication
Wales (WLS)
ISO3166 Countries
2022-02-05
publication
United Kingdom (UKM)
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
publication
upper epipelagic water column
-5.63882180
-2.48898781
51.10318921
53.55513005
2009-01-01
2011-01-28
-30
0
Natural Resources Wales (NRW)
0300 065 3000
Maes-y-Ffynnon
LL57 2DW
enquiries@naturalresourceswales.gov.uk
distributor
dataset
Countryside Council for Wales (CCW) has been investigating and controlling the spread of D. vexillum in Holyhead Marina since 2009. For this project, all the GIS spatial processing was carried out in ArcMAP 9.3 and used the ArcMAP toolbox along with Hawth's Tools and ET Geowizzards toolboxes. Data was used from 2009 - 2011 and a predictability model used which may have some limitations. In order to predict the potential spread of D. vexillum a simple modelling approach can be used, which uses the species biological limits and current known populations to estimate the positions of future colonies. Whilst this approach quickly produces results, it is limited as the model is not quantitative and can not be adequately tested.