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     data   graph     files  public [Algal Habitat Coverage] - Percent cover of algal habitat types on a by-transect and/or
subsample basis recorded during emergent and rapid emergent surveys conducted in the subtidal
zone of northern California, Sonoma and Mendocino counties, from 1999 to 2023 (Collaborative
Research: The effects of marine heatwaves on reproduction, larval transport and recruitment in
sea urchin metapopulations)
   ?   F   I   M   background (external link) RSS Subscribe BCO-DMO bcodmo_dataset_929546_v1

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.929546.1
attribute NC_GLOBAL Easternmost_Easting double -123.0715
attribute NC_GLOBAL geospatial_lat_max double 39.42859
attribute NC_GLOBAL geospatial_lat_min double 38.31536
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -123.0715
attribute NC_GLOBAL geospatial_lon_min double -123.829
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/929546 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
attribute NC_GLOBAL Northernmost_Northing double 39.42859
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 38.31536
attribute NC_GLOBAL summary String The Kelp Forest Monitoring data record span surveys across 24 years from 1999 through 2023 at 20 locations on the Sonoma-Mendocino Coast, Northern California. Years without data, inclusive: 2002, 2020, 2021. These surveys are ongoing and are conducted by the California Department of Fish and Wildlife dive team with participation from dive program partners at UC Davis, UC Santa Cruz, Cal Poly Humboldt, Sonoma State and other dive programs and volunteers. Not all sites were surveyed in all years. Surveys prior to 2003 were not conducted by the same teams or with the same methods except that all surveys were done using Scuba along 30 x 2m transects randomly placed in the subtidal zone in rocky habitats dominated by bull kelp, Nereocystis luetkeana, forests. These randomly placed band transects surveys were stratified by depth (A=0-15, B=16-30, C=31-45, D=46-60 ft) as we know sea urchin and abalone populations differ by depth.

Data collected for algal habitat coverage from 17 years of those surveys (1999-2016) include quantification by percent coverage of six substrate/algal types: bare rock, canopy, encrusting, foliose, subcanopy, and turf. These data provide a baseline of algal coverage in the kelp forest before, during and after the major marine heatwave of 2014-2016 in northern California, Sonoma and Mendocino counties.

Algal composition in the subtidal has changed dramatically from the time before 2014 to post marine heatwave and sea urchin population explosion. The substrate is now dominated by encrusting algae including crustose coralline algae, Ralfsia, Hildenbrandia, and other fleshy crusts.
attribute NC_GLOBAL title String [Algal Habitat Coverage] - Percent cover of algal habitat types on a by-transect and/or subsample basis recorded during emergent and rapid emergent surveys conducted in the subtidal zone of northern California, Sonoma and Mendocino counties, from 1999 to 2023 (Collaborative Research: The effects of marine heatwaves on reproduction, larval transport and recruitment in sea urchin metapopulations)
attribute NC_GLOBAL Westernmost_Easting double -123.829
variable Survey_Num   String  
attribute Survey_Num long_name String Survey_num
attribute Survey_Num units String unitless
variable DFW_short_code   String  
attribute DFW_short_code long_name String Dfw_short_code
attribute DFW_short_code units String unitless
variable SiteName   String  
attribute SiteName long_name String Sitename
attribute SiteName units String unitless
variable latitude   float  
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range float 38.31536, 39.42859
attribute latitude axis String Y
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   float  
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range float -123.829, -123.0715
attribute longitude axis String X
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable SurveyType   String  
attribute SurveyType long_name String Surveytype
attribute SurveyType units String unitless
variable SurveyDate   String  
attribute SurveyDate long_name String Surveydate
attribute SurveyDate units String unitless
variable Year   int  
attribute Year actual_range int 1999, 2016
attribute Year long_name String Year
attribute Year units String unitless
variable Month   int  
attribute Month actual_range int 1, 12
attribute Month long_name String Month
attribute Month units String unitless
variable Day   int  
attribute Day actual_range int 1, 31
attribute Day long_name String Day
attribute Day units String unitless
variable Timezone   String  
attribute Timezone long_name String Timezone
attribute Timezone units String unitless
variable Subsample   String  
attribute Subsample long_name String Subsample
attribute Subsample units String unitless
variable HabitatID   String  
attribute HabitatID long_name String Habitatid
attribute HabitatID units String unitless
variable Habitat   String  
attribute Habitat long_name String Habitat
attribute Habitat units String unitless
variable PercentCover   float  
attribute PercentCover actual_range float 0.0, 140.0
attribute PercentCover long_name String Percentcover
attribute PercentCover units String unitless (percent)
variable HabitatDefinition   String  
attribute HabitatDefinition long_name String Habitatdefinition
attribute HabitatDefinition units String unitless
variable Comments   String  
attribute Comments long_name String Comments
attribute Comments units String unitless
variable ProtectionStatus   String  
attribute ProtectionStatus long_name String Protectionstatus
attribute ProtectionStatus units String unitless
variable depth_f   float  
attribute depth_f actual_range float 5.0, 67.5
attribute depth_f long_name String Averagedepth
attribute depth_f units String feet
variable MinimumDepth   int  
attribute MinimumDepth actual_range int 2, 63
attribute MinimumDepth long_name String Minimumdepth
attribute MinimumDepth units String feet
variable MaximumDepth   int  
attribute MaximumDepth actual_range int 6, 80
attribute MaximumDepth long_name String Maximumdepth
attribute MaximumDepth units String feet

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.


 
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