Bird density and marine mammal counts based on 7700 meter bins in southern California, 1999-2002

Metadata Updated: October 10, 2019

Tracklines and associated observations were mapped and analyzed using ArcMap (ESRI, Redlands, CA). GPS data were recorded in NAD27 map datum and projected to an USGS Albers Equal Area Conic map projection for presentation and subsequent density analyses. Concatenated GPS and observation data were then used to generate point and line coverages in ArcMap (ESRI, Redlands, CA). We designed a custom analytic tool using ArcMap Model Builder that allows for the construction and export of user-specified and effort-adjusted spatial binning of species observations along continuous trackines. For the purposes of this report, we calculated seabird density estimates and marine mammal counts along continuous 3.0-kilometer and 7.7-kilometer trackline segments (i.e., 3.0 kilometer and 7.7 kilometer bins). Therefore, marine bird densities (at 3-kilometer scale, for example) are based on a composite strip area ranging from 0.15 per kilometer squared (one observer on effort) to 0.30 per kilometer squared (two observers on effort). We made no effort to adjust densities such that they would be proportional to variations in the area of buffered transect strip bin (i.e., weighted offset variable). These data are associated with the following publication: Mason, J.W., McChesney, G.J., McIver, W.R., Carter, H.R., Takekawa, J.Y., Golightly, R.T., Ackerman, J.T., Orthmeyer, D.L., Perry, W.M., Yee, J.L. and Pierson, M.O. 2007. At-sea distribution and abundance of seabirds off southern California: a 20-Year comparison. Cooper Ornithological Society, Studies in Avian Biology Vol. 33. References- ESRI. ArcGIS Desktop: Release 10. Redlands, CA: Environmental Systems Research Institute.

Access & Use Information

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.

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Dates

Metadata Date February 23, 2017
Metadata Created Date April 30, 2019
Metadata Updated Date October 10, 2019
Reference Date(s) March 29, 2017 (publication)
Frequency Of Update notPlanned
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI CKAN Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date February 23, 2017
Metadata Created Date April 30, 2019
Metadata Updated Date October 10, 2019
Reference Date(s) March 29, 2017 (publication)
Responsible Party U.S. Geological Survey, Western Ecological Research Center (Point of Contact)
Contact Email
Access Constraints Use Constraints: The authors of these data (USGS and HSU) require that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata, and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government., Access Constraints: This is public data; no constraints to access of data.
Bbox East Long -117.117116683
Bbox North Lat 36.331635637
Bbox South Lat 31.768018215
Bbox West Long -122.08147938
Coupled Resource
Extras Rollup {"bbox-east-long": "-117.117116683", "harvest_source_id": "34ce571b-cb98-4e0b-979f-30f9ecc452c5", "resource-type": "dataset", "bbox-north-lat": "36.331635637", "coupled-resource": "[]", "guid": "", "spatial_harvester": "true", "bbox-south-lat": "31.768018215", "spatial-reference-system": "", "spatial": "{\"type\": \"Polygon\", \"coordinates\": [[[-122.08147938, 31.768018215], [-117.117116683, 31.768018215], [-117.117116683, 36.331635637], [-122.08147938, 36.331635637], [-122.08147938, 31.768018215]]]}", "progress": "completed", "access_constraints": "[\"Use Constraints: The authors of these data (USGS and HSU) require that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata, and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.\", \"Access Constraints: This is public data; no constraints to access of data.\"]", "temporal-extent-begin": "1999-05-08", "contact-email": "josh_adams@usgs.gov", "bbox-west-long": "-122.08147938", "metadata-date": "2017-02-23", "dataset-reference-date": "[{\"type\": \"publication\", \"value\": \"2017-03-29\"}]", "harvest_source_title": "DOI CKAN Harvest Source", "frequency-of-update": "notPlanned", "licence": "[\"Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.\"]", "metadata_type": "geospatial", "harvest_object_id": "23c4a491-b0aa-4e2b-8599-bd662ff45d33", "responsible-party": "[{\"name\": \"U.S. Geological Survey, Western Ecological Research Center\", \"roles\": [\"pointOfContact\"]}]", "temporal-extent-end": "2002-01-20", "spatial-data-service-type": "", "metadata-language": ""}
Frequency Of Update notPlanned
Guid
Harvest Object Id 35f6d259-8a4e-4224-83da-879d1ba1d6b1
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Licence Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 1999-05-08
Temporal Extent End 2002-01-20

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