Name: SBA coraux et des éponges 2016

Display Field: Label_Name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Significant Benthic Areas are defined in DFO's Ecological Risk Assesment Framework (ERAF) as “significant areas of cold-water corals and sponge dominated communities”, where significance is determined “through guidance provided by DFO-lead processes based on current knowledge of such species, communities and ecosystems”. Here we provide maps of the location of significant concentrations of corals and sponges on the east coast of Canada produced through quantitative analyses of research vessel trawl survey data, supplemented with other data sources where available. We have conducted those analyses following a bio-regionalization approach in order to facilitate modeling of similar species, given that many of the multispecies surveys do not record coral and sponge catch at species level resolution. The taxa analyzed are sponges (Porifera), large and small gorgonian corals (Alcyonacea), and sea pens (Pennatulacea). We applied kernel density estimation (KDE) to create a modelled biomass surface for each of those taxa, and applied an aerial expansion method to identify significant concentrations, following an approach first applied in 2010 to this region. We compared our results to those obtained previously. KDE uses only geo-referenced biomass data to identify “hot spots”. The borders of the areas so identified can be refined using knowledge of null catches and species distribution models that predict species presence-absence and/or biomass, both incorporating environmental data.Wepresent such predictive models produced using a random forest machine-learning technique, and in one region compare the biomass random forest models for sea pens to those produced by generalized additive models (GAMs). Together, these distribution maps can be used to identify significant concentrations of corals and sponges in eastern Canada; an essential first step in the identification of Sensitive Benthic Areas.

Service Item Id: 67c899d1a4584a868be5ef773162ba05

Copyright Text: Fisheries and Oceans Canada, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, NS, Canada B2Y 4A2

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

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: -79.14501518740093
YMin: 41.130872245357864
XMax: -47.73201172875821
YMax: 75.68959481414942
Spatial Reference: 4326  (4326)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: Label_Name
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: Large Gorgonian Coral Significant Benthic Areas
  Label: Grandes gorgones
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [230, 0, 0, 255]
  Width: 1
• Value: Large Gorgonian Coral Significant Benthic Areas from KDE analyses
  Label: Grandes gorgones
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [230, 0, 0, 255]
  Width: 1
• Value: Large Gorgonian Coral Significant Benthic Areas from the random forest presence-absence SDM
  Label: Grandes gorgones
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [230, 0, 0, 255]
  Width: 1
• Value: Sea Pen Significant Benthic Areas from KDE analyses
  Label: Plumes de mer
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [255, 255, 0, 255]
  Width: 1
• Value: Sea Pen Significant Benthic Areas from the random forest presence-absence SDM
  Label: Plumes de mer
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [255, 255, 0, 255]
  Width: 1
• Value: Small Gorgonian Coral Significant Benthic Areas from KDE analyses
  Label: Petites gorgones
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [38, 115, 0, 255]
  Width: 1
• Value: Small Gorgonian Coral Significant Benthic Areas from the random forest presence-absence SDM
  Label: Petites gorgones
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [38, 115, 0, 255]
  Width: 1
• Value: Sponge Significant Benthic Areas from KDE analyses
  Label: Éponges
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 0, 0, 0]
  Outline:
  Style: esriSLSSolid
  Color: [0, 0, 0, 255]
  Width: 1
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: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )
• Area_km2 ( type: esriFieldTypeDouble, alias: Area_km2 )
• BioGeo_Reg ( type: esriFieldTypeString, alias: BioGeo_Reg, length: 50 )
• Label_Name ( type: esriFieldTypeString, alias: Label_Name, length: 100 )
• Map_Ref ( type: esriFieldTypeString, alias: Map_Ref, length: 50 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata