Name: Seagrass_Potential
Display Field: waterbody
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: DescriptionSeagrass potential areas were primarily derived from the EMODnet 2016 wave and current energy models. This data was combined with seabed digital elevation models (DEMs, sourced from EMODnet Composite 2018 DTM and the Defra Marine DEM) to determine potential seagrass habitat areas. Areas of low salinity were also screened out based on Environment Agency salinity monitoring and modelling data.Selection Criteria used habitat preferences for Zostera marinaandZ. noltei identified by the Marine Life Information Network (MarLIN) as follows:Wave = Low Energy, <11.41 Nm-2(mean of annual 90th percentile values over six years)Current = Low Energy, <130 Nm-2, (mean of annual 90th percentile values over six years)Elevation = Between -10m to 5m above sea level.Salinity = >10 (mesohaline, polyhaline)Further areas were removed, including existing saltmarsh (sourced from EA saltmarsh extent inventory) and small discrete areas <400m2. Small areas were also removed based on expert judgement and their close proximity to major ports.Finally, each polygon was assigned a water body and river basin district based on the WFD cycle2 Transitional and Coastal Water Body layer. Guidance and LimitationsThe Seagrass Potential Area layer provides a national ‘high level’ indication of where intertidal and subtidal seagrass could potentially be restored based on some key physical attributes. It should be considered as an initial aid to identifying sites. The areas identified are based on outputs from large scale models and should not always be assumed to precise at the local level.The location of significant activities (such as dredging) and marine assets (such as submarine cables), which could restrain a location’s potential, have not been factored in in the creation of this layer. The presence of such activities and structures should of course be considered at an early stage before making any local selection of suitable sites.It should not be assumed that all the areas identified meet all environmental conditions required to re-establish seagrass habitat or that seagrass beds currently only exist within these areas. Instead it aims to provide an initial attempt to identify potential areas at a national level. Furthermore, it is probable that there are some areas outside the areas identified that could be suitable for restoration.
Copyright Text: Information has been derived from data that is made available under the European Marine Observation Data Network (EMODnet) Seabed Habitats project (www.emodnet-seabedhabitats.eu), funded by the European Commission’s Directorate-General for Maritime Affairs and Fisheries (DG MARE)
Information has been derived from data that is made available under the European Marine Observation Data Network (EMODnet) Bathymetry project (www.emodnet-bathymetry.eu), funded by the European Commission’s Directorate-General for Maritime Affairs and Fisheries (DG MARE)
Information has been derived from Defra Marine Digital Elevation Model (DEM)
Default Visibility: true
MaxRecordCount: 2000
Supported Query Formats: JSON, geoJSON, PBF
Min Scale: 3000000
Max Scale: 100
Supports Advanced Queries: true
Supports Statistics: true
Has Labels: false
Can Modify Layer: true
Can Scale Symbols: false
Use Standardized Queries: true
Supports Datum Transformation: true
Extent:
XMin: 92804.92949999962
YMin: 10211.014200000092
XMax: 625849.9781
YMax: 638265.6802999992
Spatial Reference: 27700
(27700)
Drawing Info:
Renderer:
Simple Renderer:
Symbol: Style: esriSFSSolid
Color: [85, 255, 0, 255]
Outline:
Label: N/A
Description: N/A
Transparency: 0
Labeling Info:
Advanced Query Capabilities:
Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
HasZ: true
HasM: true
Has Attachments: false
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Type ID Field: null
Fields:
-
objectid
(
type: esriFieldTypeOID, alias: objectid
)
-
waterbody
(
type: esriFieldTypeString, alias: waterbody, length: 100
)
-
rbd
(
type: esriFieldTypeString, alias: rbd, length: 100
)
-
area
(
type: esriFieldTypeDouble, alias: dspdb.ea.seagrass_potential.area
)
-
unique_
(
type: esriFieldTypeInteger, alias: unique_
)
-
shape
(
type: esriFieldTypeGeometry, alias: shape
)
-
shape_Length
(
type: esriFieldTypeDouble, alias: shape_Length
)
-
shape_Area
(
type: esriFieldTypeDouble, alias: shape_Area
)
Supported Operations:
Query
Query Attachments
Query Analytic
Generate Renderer
Return Updates
Iteminfo
Thumbnail
Metadata