Short Citation:
National Centers for Coastal Ocean Science, 2021: Kelp distribution off California, https://www.fisheries.noaa.gov/inport/item/39359.

Item Identification

Title: Kelp distribution off California
Short Name: kelp_ca.shp
Status: Completed
Publication Date: 2004
Abstract:

This data set delineates kelp beds (Nereocystis leutkeana and Macrocystis spp.) along the Pacific Coast of California. Multiple years of kelp mapping data for the state have been compiled into a single coastwide data set. Due to variability in oceanographic and climatic conditions, kelp bed abundance and distribution is extremely variable from year to year. Therefore kelp bed locations and extent in a particular year may not reflect current or past conditions. In addition, the methods for mapping kelp in California have changed over time. Despite these caveats, this multi-year kelp coverage can be used to identify areas that have been known to support kelp growth, and investigate general patterns of kelp distribution on a coastwide scale.California has three coastal kelp surveys. The first survey, 1989, was a coastwide survey using the same contractor and method as Washington State. Kelp canopy data from the second survey, 1999, was created from digital image processing of scanned aerial photographs. The 2002 survey was performed with a Digital Multispectral Video (DMSV) sensor and kelp beds were delineated by digital image processing techniques.

Purpose:

These data were developed for Pacific States Marine Fisheries Commission in cooperation with the National Marine Fisheries Service Northwest Region and the Pacific Fishery Management Council in support of an Environmental Impact Statement (EIS) to consider the designation and conservation of Essential Fish Habitat (EFH) for Pacific Coast Groundfish. These data were consolidated and integrated in a GIS format to support spatially explicit groundfish habitat modelling and impacts assessment on a coastwide scale.

Notes:

281

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/NOS/NCCOS > National Centers for Coastal Ocean Science, National Ocean Service, NOAA, U.S. Department of Commerce
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biological Classification > Plants > Macroalgae (Seaweeds) > Brown Algae
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecological Dynamics > Community Dynamics > Community Structure
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecological Dynamics > Ecosystem Functions
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecological Dynamics > Species/Population Interactions > Use/Feeding Habitats
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Benthic
Global Change Master Directory (GCMD) Science Keywords Earth Science > Biosphere > Ecosystems > Marine Ecosystems > Pelagic
Global Change Master Directory (GCMD) Science Keywords Earth Science > Human Dimensions > Environmental Governance/Management > Environmental Assessments
Global Change Master Directory (GCMD) Science Keywords Earth Science Services > Models > Dynamic Vegetation/Ecosystem Models
ISO 19115 Topic Category environment
ISO 19115 Topic Category oceans
NOS Data Explorer Topic Category Environmental Monitoring
None coastal
None essential fish habitat (EFH)
None kelp
None Macrocysits
None marine plant
None Nereocystis

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords Continent > North America > United States Of America > California
None California
None Channel Islands National Marine Sanctuary
None Northwest Pacific Ocean

Physical Location

Organization: National Centers for Coastal Ocean Science
City: Silver Spring
State/Province: MD

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: Unknown
Data Presentation Form: vector digital data
Distribution Liability:

Unknown

Data Set Credit: Cooperators and funders who contributed to development of these data, include Pacific States Marine Fisheries Commission, and National Marine Fisheries Service, Northwest Fisheries Science Center, Southwest Fisheries Science Center, Northwest Region, and Southwest Region.

Support Roles

Data Steward

CC ID: 467153
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Distributor

CC ID: 467155
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Metadata Contact

CC ID: 467156
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Point of Contact

CC ID: 467154
Date Effective From: 2004
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Principal Investigator

CC ID: 467157
Date Effective From: 2004
Date Effective To:
Contact (Person): Clark, Randy
Address: 1021 Balch Blvd
Stennis Space Center, MS 39529
Email Address: randy.clark@noaa.gov
Phone: 228-688-3732

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 467160
W° Bound: -124.397359
E° Bound: -116.826846
N° Bound: 40.475111
S° Bound: 32.520358

Extent Group 1 / Time Frame 1

CC ID: 467159
Time Frame Type: Range
Start: 1989
End: 2002

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Vector Representation 1

CC ID: 584503
Complex Object Present?: Yes
Complex Object Count: 269271

Access Information

Security Class: Unclassified
Data Access Constraints:

None

Data Use Constraints:

None

Distribution Information

Distribution 1

CC ID: 467161
Download URL: http://coastalscience.noaa.gov/datasets/ccma/biogeo/cinms/Chap_2_Data/kelp_ca.zip
Distributor:
Description:

Downloadable Data

File Type: ESRI Shape File
File Size: 81
Compression: Uncompressed

URLs

URL 2

CC ID: 467150
URL: http://ccma.nos.noaa.gov/products/biogeography/cinms/data/
URL Type:
Online Resource

URL 3

CC ID: 467151
URL: http://ccma.nos.noaa.gov/ecosystems/sanctuaries/chanisl_nms/
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 467175
Activity Date/Time: 2014-09-03
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 467174
Activity Date/Time: 2017-04-05
Description:

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 584501
Activity Date/Time: 2017-09-13
Description:

Partial upload of Spatial Info section only.

Activity Log 4

CC ID: 601078
Activity Date/Time: 2017-11-01
Description:

Replaced entire Lineage section to populate new Source Contribution field.

Activity Log 5

CC ID: 716651
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Technical Environment

Description:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535

Data Quality

Accuracy:

Final habitat codes were reviewed for conformance to the list of all potential species codes. The absolute accuracy of species identification is dependent upon the source data and was not validated for this multi-year data compilation.

Horizontal Positional Accuracy:

Horizontal accuracy was not assessed, so the positional accuracy is unknown.

Completeness Report:

Data are generally comprehensive for the marine nearshore area off the California Coast of the United States. West Coast estuaries (including San Francisco Bay and smaller coastal estuaries) are not included. The 1989 kelp survey in California was comprehensive, but the surveys in 1999 and 2002 did not cover the entire coastline.

Conceptual Consistency:

Kelp bed distribution and abundance are highly variable between years. Therefore, kelp bed locations and extent in a particular year may not reflect current or past conditions. The use of various techniques means that the delineation of a kelp bed is not necessarily consistent over time. These variations include: the level of generalization of kelp bed boundaries, the inclusion or omission of water polygons entirely contained within a kelp polygon, and the minimum kelp bed detected and delineated (i.e., minimum mapping unit). In addition, surveys were not comprehensive for all years mapped.

Lineage

Sources

California Coastal Kelp Resources Survey, 1989, 1999, 2002

CC ID: 601079
Contact Name: California Department of Fish and Game, Marine Region GIS Lab
Publish Date: 2002-01-01
Extent Type: Discrete
Extent Start Date/Time: 1989
Citation URL: http://www.dfg.ca.gov/
Source Contribution:

Provide delineation of kelp polygons for areas off California. | Source Geospatial Form: vector digital data | Type of Source Media: digital files provided by ftp

Process Steps

Process Step 1

CC ID: 601080
Description:

California Kelp Data Processing:1989 and 2002 data were provided as a single shape file for each year. Processing of these two shape files included conversion to ArcInfo coverage format, projecting to West Coast Albers projection, dropping extraneous items, and adding an item for species code. Species code for all polygons was set to unspecified because species was not identified in California kelp surveys. (Macrocystis pyrifera is the predominant species, but there is some Nereocystis as well).1999 coastwide data were provided as 72 separate shape files. Processing for each shape file included, conversion to ArcInfo coverage format, projecting to West Coast Albers projection, dropping extraneous items, adding species code and setting it to unspecified or none (based on source file grid-code attribute), and dissolving all polygons on species code.After individual year processing, all three annual coverages were combined into one multi-year coverage using ArcInfo UNION command. Added item for data source and set it to 'CDFG'.

Process Date/Time: 2003-01-01 00:00:00
Source: California Coastal Kelp Resources Survey, 1989, 1999, 2002

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) kelp_ca

Catalog Details

Catalog Item ID: 39359
Metadata Record Created By: Tyler Christensen
Metadata Record Created: 2017-04-05 12:52+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-06-04 13:14+0000
Metadata Record Published: 2018-07-12
Owner Org: NCCOS
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-07-13