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Oregon Coast NWRC: Surface Nesting Seabirds - Aerial Photographic Colony Surveys - 2012 GIS Raw Count Databases

Metadata Updated: December 12, 2023

This reference archives metadata about the collection of geospatial data which may be stored in a variety of file formats (e.g. shapefile, geodatabase) for the Oregon Coast NWRC: Surface Nesting Seabirds - Aerial Photographic Colony Surveys survey (PRIMR ID: FF01RORG00-002 and FF01RTAR00-002). Starting in 2012 photographs were taken using digital photography (hand-held camera). Counts (from photographs) were initially started in 2012 but were not completed until 2020.

These geospatial files represent the raw count of seabirds from non-georeferenced images. These raw point counts are not registered to any geospatial coordinates. They only line up with the image from which they were derived, no geospatial coordinates are attached to the raw images. Results of the counts are put through a secondary check and then numbers are entered into the complete Seabird Colony Count Catalog (Database) which can be downloaded from , which is the authoritative source for bird count data collected by the U.S. Fish and Wildlife Service (USFWS).

Oregon Coast National Wildlife Refuge Complex manages an Imagery Program for collecting refuge-wide aerial imagery datasets that are used to monitor nesting seabirds on offshore islands. Aerial flights are generally conducted annually to monitor population status and trends, but the imagery is used for other resource monitoring purposes.

Aerial photography has served as the primary means for monitoring populations of nesting seabirds (Census years include 1988, 1994, 2006, and 2014), and the subsequent analysis of long-term seabird colony legacy data in the Pacific Northwest as a regional baseline. The 2012 set of photographs have been used to complete a refuge-wide colony subsample count for 2012, where each photograph in the subsample has a digital point file (hand count) of nesting seabirds stored in a geodatabase format.

We counted a subsample of Oregon coast colonies using a size- and geographical-based stratified random sampling approach for all other survey years. The subsample was selected based on common murre populations, therefore no inferences can be drawn about Brandt’s cormorants without additional colony subsampling. The subsampling approach was informed by recommendations from bio-statistical experts based on colony size and location. We subsampled 45 colonies, which were counted over time. Including census year counts, our subsample years were 1988, 1994, 1997, 2000, 2003, 2006, 2009, 2012, and 2014.

A power analysis for the sampling design recommended for the Protocol Framework indicated that a minimum of 16 common murre within each region needed to be counted each year in order detect an average decline of 3.35% per year over a 15-year period (cumulative 40% decline) with 80% probability. With guidance from two statisticians, we randomly selected 6 small and 9 medium/large colonies per region for a total of 45 colonies to be counted each year to detect changes across the Oregon Coast.

For more information about the long-term monitoring of seabirds along the Oregon Coast, go to The Service Catalog (ServCat) at the following link: https://ecos.fws.gov/ServCat/Reference/Profile/125347

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

References

https://ecos.fws.gov/ServCat/Reference/Profile/128450

Dates

Metadata Created Date May 31, 2023
Metadata Updated Date December 12, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date May 31, 2023
Metadata Updated Date December 12, 2023
Publisher U.S. Fish and Wildlife Service
Maintainer
@Id http://datainventory.doi.gov/id/dataset/556ff8519544a8cef9d7fa262f17fa45
Identifier FWS_ServCat_128450
Data First Published 2020-01-01T12:00:00Z
Data Last Modified 2020-01-01
Category geospatial
Public Access Level public
Bureau Code 010:18
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://datainventory.doi.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Data Quality True
Harvest Object Id dbe5f450-2c28-4a57-99ea-a5ba2ee288e0
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Homepage URL https://ecos.fws.gov/ServCat/Reference/Profile/128450
Metadata Type geospatial
Old Spatial -124.703819,41.9984856,-123.927681,46.25652
Program Code 010:028, 010:094
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Fish and Wildlife Service
Related Documents https://ecos.fws.gov/ServCat/Reference/Profile/128450
Source Datajson Identifier True
Source Hash 4253b322d35077beea0951014a643a83c0517c3c914c751169a95a7bb56b90d1
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -124.703819, 41.9984856, -124.703819, 46.25652, -123.927681, 46.25652, -123.927681, 41.9984856, -124.703819, 41.9984856}
Temporal 2012-01-01T12:00:00Z/2012-01-01T12:00:00Z

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