Parent Layer: Movement Information

Name: Red throated loon, fall migration, utilization distribution

Display Field: cnt_lvl

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: These datasets represent some of the results of a study to determine fine-scale use and movement patterns over the course of five years (2012-2016) of over 400 individuals of three species of diving marine birds, Red-throated Loon (Gavia stellata), Surf Scoter (Melanitta perspicillata), and Northern Gannet (Morus bassanus), in Federal waters of the mid-Atlantic U.S. during migration and winter. These species are each found in relatively large numbers and represent a cross-section of marine birds within mid-Atlantic U.S. waters during this time period. They are all considered species of conservation concern, and also exhibit traits that may make them vulnerable to the adverse effects of offshore wind development. Tracking data were analyzed using dynamic Brownian bridge movement models to develop spatial utilization distributions (UDs) for each species. The UD represents the probability that an animal will occur in space at a specified time. The mean UD surface was contoured to represent different levels of habitat use. The 95% UD is called the "Mean home range" and the 50% UDs represent "Core use areas". The study also developed maps of the full UD for each species and season, and examined factors influencing occurrence. For more information, see <a href="https://www.northeastoceandata.org/wp-content/uploads/2019/11/Determining-Fine-scale-Use-and-Movement-Patterns-of-Diving-Bird-Species-in-Federal-Waters-of-the-Mid-Atlantic-United-States-Using-Satellite-Telemetry.pdf"target="_blank"> the BOEM report</a> <br/> <br/> These data products and their underlying data differ from other marine life data available on the Portal, and users are urged to interpret the data with these differences in mind. For more information on how these layers can be used together or separately from modeled distribution (MDAT) bird data, see sections 7.2.3 and 7.5.2.1 in OCS Study BOEM 2017-069.

Definition Expression: N/A

Copyright Text: Bureau of Ocean Energy Management, Environmental Studies Program: Spiegel et al. 2017. Determining fine-scale use and movement patterns of diving bird species in Federal waters of the Mid-Atlantic United States using satellite telemetry. OCS Study BOEM 2017-069.

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, AMF, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Extent:

XMin: -1.29418953371E7
YMin: 4169738.8184999973
XMax: -6169394.740900001
YMax: 1.21073223556E7
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: cnt_lvl
Field 2: null
Field 3: null
Field Delimiter: ,
Default Symbol:
N/A
Default Label: null
UniqueValueInfos:
• Value: 0.5
  Label: 50% - Core use areas
  Description:
  Symbol:
  Style: esriSFSSolid
  Color: [205, 102, 102, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 0, 0, 0]
  Width: 1
• Value: 0.75
  Label: 75%
  Description:
  Symbol:
  Style: esriSFSSolid
  Color: [245, 202, 122, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 0, 0, 0]
  Width: 1
• Value: 0.95
  Label: 95% - Mean home range
  Description:
  Symbol:
  Style: esriSFSSolid
  Color: [68, 79, 137, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 0, 0, 0]
  Width: 1
Transparency: 30
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true

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 )
• cnt_lvl ( type: esriFieldTypeDouble , alias: cnt_lvl )
• Shape_Length ( type: esriFieldTypeDouble , alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble , alias: Shape_Area )

Supported Operations:   Query   Generate Renderer   Return Updates