Kelp Persistence - R7 - CDFW [ds3151]

Identification Information:
Citation:
Citation Information:
Publication Date: 20240202
Title: Kelp Persistence - R7 - CDFW [ds3151]
Geospatial Data Presentation Form: raster digital data
Online Linkage: https://wildlife.ca.gov/Data/BIOS
Online Linkage: https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/3100_3199/ds3151.zip
Online Linkage: https://filelib.wildlife.ca.gov/Public/R7_MR/BIOLOGICAL/Kelp/
Description:
Abstract: Yearly California kelp canopy surveys from 2002 - 2006, 2008 - 2010, and 2013 - 2016 were each rasterized at a 5m cell size using a Boolean raster with presence/absence values (e.g. 1 or 0). The resulting raster grids were added together using a raster calculator resulting in a raster with counts (value) of how many yearly instances where kelp was present in that cell over the period of all the surveys. An additional attribute indicating administrative kelp bed number was added. Source kelp canopy input data are retrieved from CDFW at this location: https://filelib.wildlife.ca.gov/Public/R7_MR/BIOLOGICAL/Kelp/.
Purpose: To show the persistence of Kelp Canopy from year to year as detected in 13 annual surveys conducted by the California Department of Fish and Wildlife between 2002 and 2016.
Supplemental Information: 11/16/16 Updates to regions listed below were appended to the original shapefile and then merged when sources were the same. Update of Tomales Bay with data from CDFW aerial imagery (2010,2013). Photographs were taken on 6/29/2010 on the incoming tide following a -0.5 ft. low at 08:25. Photographs were georeferenced 5/6-5/8/2013. Ground-truthing took place 5/13/2013-7/25/2013 This feature was finalized on 7/26/2013. This data replaced the already existing 2010,2013 Tomales Bay data in the shapefile, although they did appear to be identical datasets. Update of Estero American with data from CDFW staff (2014) and (2016). Bed areas in the Estero Americano were surveyed between June and September 2014, and again in July 2016, by CDFW staff using global positioning system (GPS) technology, observation, and field notes. Polygon features were digitized from the survey data with the aid of 2012 and 2014 National Agriculture Imagery Program (NAIP) imagery. The new 2014 data and already existing 2014 data appeared to be identical. The new 2014 data replaced the 2014 data already in the shapefile. Update of Albion River estuary with data from CDFW staff (2014,2015). Bed areas in the Albion River estuary were initially surveyed on 10/3/2014 by CDFW staff using GPS, observations, and field notes, with a follow-up survey on 5/21/2015. Polygon features were digitized from the survey data with the aid of 2012 NAIP imagery. This data replaced the already existing 2014,2015 Albion River estuary data in the shapefile, although they did appear to be identical datasets. Update of Big River estuary and Smith River estuary data with data from CDFW staff (2015). Bed areas in the Big River estuary were surveyed on 9/21/2015 by CDFW staff using GPS, observations, and field notes. Polygon features were digitized from the survey data with the aid of 2012 NAIP imagery. This data replaced the already existing 2015 Big River estuary data in the shapefile, although they did appear to be identical datasets. Bed areas in the Smith River estuary were surveyed on 7/05/2015 by CDFW staff using GPS, observations, and field notes. Polygon features were initially digitized to .kml file using Google Earth and were later converted to .shp for inclusion in this dataset. Update of Estero de San Antonio with data from CDFW staff (2016). Bed areas in the Estero de San Antonio were surveyed in August 2016 by CDFW staff using GPS, observation, and field notes. Polygon features were digitized from the survey data with the aid of 2014 NAIP. Update of Ten Mile River estuary with data from CDFW staff (2016). Bed areas in the Ten Mile River Estuary were surveyed in July 2016 by CDFW staff using GPS, observation, and filed notes. Polygon features were digitized from the survey data with the aid of 2014 NAIP imagery. The NOAA ESI (2002) data for this location was removed and replaced by this update. 5/4/2016 Update of San Francisco Bay with data from Merkel & Associates (2014). This data should approximate previous data from ERMA, (see below) however, some topological differences were noted and previous features were replaced in favor of these records directly from Merkel and Associates. Features are aggregated with attributes dropped. See original source data for additional detail. Digital maps of the distribution of eelgrass throughout San Francisco Bay were created from interferometric side-scan survey data. Following completion of the surveys, sonar traces were downloaded and processed into rectified mosaic images in a GeoTiff format using Chesapeake Technologies, Inc. Sonar Wiz. Eelgrass was mapped by manually digitizing from registered sidescan mosaics and aerial photographs using ESRI ArcGIS software. Update of Estero Americano with data from Andrew Weltz, CDFW (2014). Bed areas in the Estero Americano were surveyed between June and September 2014 by CDFW staff using global positioning system (GPS) technology, observation, and field notes. Polygon features were digitized from the survey data with the aid of 2012 National Agriculture Imagery Program (NAIP) imagery. Update of Big River Estuary with data from Andrew Weltz, CDFW (2015). Bed areas in the Big River estuary were surveyed on 9/21/2015 by CDFW staff using global positioning system (GPS) technology, observations, and field notes. Polygon features were digitized from the survey data with the aid of 2012 NAIP imagery. Update of Albion River Estuary with data from Andrew Weltz, CDFW (2014, 2015). Bed areas in the Albion River estuary were initially surveyed on 10/3/2014 by CDFW staff using GPS, observations, and field notes, with a follow-up survey on 5/21/2015. Polygon features were digitized from the survey data with the aid of 2012 NAIP imagery. Update of Bodega Bay harbor and Drakes Estero with data from Ocean Imaging (2010). This vector dataset was developed for the Sea Grant MPA Baseline Program as part of the project “High Resolution Nearshore Substrate Mapping and Persistence with Multispectral Aerial Imagery” (#R/MPA17 09-015). The study region is the California North Central Coast (NCC). The imagery used for this habitat classification were collected by Ocean Imaging (OI) and Fugro EarthData. OI acquired this imagery on 03/26/2010 using the Digital Multispectral Camera (DMSC). Details on this system and the data processing are below in the Lineage section of this document. Fugro EarthData acquired the imagery used for this project between 09/22/2010 – 09/23/2010 and delivered fully georeferenced and orthorectified, 12-bit imagery with a spatial resolution of 0.30 meters to OI in 2011. Details on this system and the data processing are also below in the Lineage section of this document. Individual DMSC and ADS40 scenes were mosaicked into sections based on the USGS orthoquads for the California North Central Coast in order to generate the multispectral imagery required to produce the habitat classification thematic maps of the California North Central Coast’s intertidal region and kelp beds from Pigeon Point up to Point Arena, including select bays and river mouths designated as MPAs. 9/9/2014 Update of San Francisco Bay and southern California regions (including Channel Islands) with sources available from NOAA's Environmental Response Management Application (ERMA - https://www.erma.unh.edu). See source features for specific survey data. 7/29/2013 Update area of Tomales Bay based on data recieved by Andrew Weltz, California Department of Fish and Wildlife. Source metadata: Abstract: Bed extents were digitized based on 2010 aerial imagery and 2013 ground-truthing surveys. Description: Zostera marina bed extents were digitized from 2010 CDFW aerial imagery. Photographs were taken on 6/29/2010 on the incoming tide following a -0.5 ft. low at 08:25. Photographs were georeferenced 5/6-5/8/2013. This shapefile was created 5/8/2013 - 7/26/2013. Credits: Shapefile digitized by Andrew Weltz of CDFW's Aquaculture and Bay Management Project from aerial photographs taken by Ron VanBenthuysen of CDFW and georeferenced by Andrew Weltz. 11/15/2009 Updated areas around Humboldt Bay with data provided by John Mello, CDFG. Those data derived from year 2000 IR imagery. Metadata abastract below: The areal distribution of Humboldt Bay (Humboldt County) California eelgrass was examined from aerial photographs taken in 18 September 2000 and on-ground observations. In ArcView 3.2® Geographic Information Systems (GIS) software the polygon drawing tool was used to delineate the extent of eelgrass coverage in the bay (Shull and Bulthuis 2002). Polygons were converted to shape files using ArcView 3.2 to calculate the areal distribution of eelgrass in hectares. The photomosaic was used to calculate eelgrass distribution. The lower intertidal limits of eelgrass beds were delineated using Humboldt Bay channels verified by visual observation during minus tides. Tidal elevation delineates the upper intertidal perimeter of the eelgrass beds adjacent to the shore. The upper intertidal perimeter of eelgrass beds was confirmed by walking to these areas at low tide or using a small boat at high tide and recording positions of bed perimeters with a handheld GPS. The GPS positions were compared with the delineation of the beds from the 2000 photo-mosaic. Only large continuous beds were measured. Pools and depressions in mid to high intertidal mudflats containing eelgrass were not included in the survey nor were eelgrass patches in sloughs around the bay. Seventeen eelgrass beds were defined, but only nine were used in the study (Fig. 1). Four eelgrass beds were in North Bay (beds 1, 4, 5, 6,), two in Central Bay (beds 9, 10) and three in South Bay (beds 12, 13, 15). Deep-water channels define the entire perimeter of bed 5 and the lower tidal elevation of beds 1, 4, 6, 9, 10,12, 13, and 15. Sample sites were located outside of shellfish culture operations. Large continuous eelgrass beds in North and South bays and narrow fringing beds in Central Bay cover 1890 ha. 6/27/05 Loaded additional areas for Elkhorn Slough eelgrass beds defined by Eric VanDyke. No additional attributes or metadata provided. Transmittal posted here: from: Eric VanDyke Chad, Here’s the Sherry Palacios/Dick Zimmerman seagrass shapefile (UTM zone 10, WGS84) collected from a boat using differential GPS on April 4, 2000. I’m not all that impressed, but it’s what we’ve got. I’ve also attached the shapefile over an April 2001 color infrared image, for comparison. cheers, -eric
Status:
Progress: Complete
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -124.988937
East Bounding Coordinate: -116.751610
North Bounding Coordinate: 42.076389
South Bounding Coordinate: 32.455290
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: MarineBIOS, CDFW, Kelp, Canopy, Macrocystis Pyrifera, Nerocystic Luetkeana, Giant Kelp, Bull Kelp
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: biota
Theme Keyword: oceans
Place:
Place Keyword Thesaurus: None
Place Keyword: California
Access Constraints: None
Use Constraints: License: This work is licensed under Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). Using the citation standards recommended for BIOS datasets (https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS) satisfies the attribution requirements of this license. Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: California Department of Fish and Wildlife
Contact Person: Marine Region GIS
Contact Address:
Address Type: mailing and physical
Address: 20 Lower Ragsdale Drive, Suite 100
City: Monterey
State or Province: CA
Postal Code: 93953
Country: US
Contact Voice Telephone: (831) 649-7143
Contact Electronic Mail Address: r7mrgis@wildlife.ca.gov
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: California Department of Fish and Wildlife
Contact Person: Marine Region GIS
Contact Address:
Address Type: mailing and physical
Address: 20 Lower Ragsdale Drive, Suite 100
City: Monterey
State or Province: CA
Postal Code: 93953
Country: US
Contact Voice Telephone: (831) 649-7143
Contact Electronic Mail Address: r7mrgis@wildlife.ca.gov
Data Set Credit: _ Marine Region GIS; ; California Department of Fish and Wildlife (CDFW); Region 7 - Marine; ; (831) 649-7143; ; ; r7mrgis@wildlife.ca.gov;
Native Data Set Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270
Spatial Data Organization Information:
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Grid Cell
Row Count: 269841
Column Count: 183395
Entity and Attribute Information:
Detailed Description:
Entity Type:
Entity Type Label: ds3151
Attribute:
Attribute Label: Rowid
Attribute Definition: Internal feature number.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute Label: VALUE
Attribute:
Attribute Label: COUNT
Attribute:
Attribute Label: Persistence
Attribute:
Attribute Label: Bed
Metadata Reference Information:
Metadata Date: 20240214
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: California Department of Fish and Wildlife
Contact Person: Marine Region GIS
Contact Address:
Address Type: mailing and physical
Address: 20 Lower Ragsdale Drive, Suite 100
City: Monterey
State or Province: CA
Postal Code: 93953
Country: US
Contact Voice Telephone: (831) 649-7143
Contact Electronic Mail Address: r7mrgis@wildlife.ca.gov
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time