Dataset: Ecological monitoring Natividad 2006-2021: Algae

Name: Ecological monitoring of algae on Isla Natividad from 2006 to 2021
Published: 2023-08-29
Keywords: ecological monitoring, Baja California Sur, algae, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.907321.1

Spatial Extent: N:27.89524 E:-115.04858 S:27.50333 W:-115.20503

Temporal Extent: 2006-08-14 - 2021-09-24

Project:

Collaborative Research: Evaluating how abalone populations in the California Current are structured by the interplay of large-scale oceanographic forcing and nearshore variability (Abalone Safe Places)

Principal Investigator:

Fiorenza Micheli (Stanford University)

Co-Principal Investigator:

Clifton Brock Woodson (University of Georgia, UGA)

Scientist:

Arturo Hernández-Velasco (Comunidad y Biodiversidad, A.C., COBI)

Carolina Olguín Jacobson (Stanford University)

Jorge Torre (Comunidad y Biodiversidad, A.C., COBI)

Technician:

Alfonso Romero (Comunidad y Biodiversidad, A.C., COBI)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2023-08-29

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Ecological monitoring of algae on Isla Natividad from 2006 to 2021

Abstract:

This dataset encompasses information about algae transects between 2006 to 2021 in Isla Natividad, Baja California Sur, Mexico. Abundances of algae and the number of stipes of each individual algae can be found in the data set. Also, the dates when the transects were done, the site, the name of the diver, the depth the transect was laid, if the site was a marine reserve or not, if the site is inside a marine protected area or not, the latitude and longitude of the sites, the temperature of the water, the number of transect from where the information was counted, and the species name of algae counted. Ecological monitoring is important to collect data of species that inhabit an specific ecosystem. For this data set, we present all the data form 2006 to 2021 on algae, marine invertebrates, fish and uniform point contact at six different sites in Isla Natividad off the coast of Baja California Sur, Mexico. Data was collected once a year by trained divers as a collaborative effort from Stanford University, non-governmental organizations, and fishing cooperative federations. These data provides the abundaces of algae, invertebrates, fish and substrate of Isla Natividad over the spam of 15 years and may be use to assess changes in the ecosystems after shocks such as hypoxic events or marine heatwaves.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2023-08-29	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.907321.1	2023-11-16

Methods & Sampling

Ecological monitoring was conducted once a year from 2006-2021 at six different sites in Isla Natividad, Baja California Sur, Mexico. Using SCUBA, trained divers laid 30 x 2 meters belt transects to collect in situ algae, marine invertebrates, fish and uniform point contact (UPC) found along the transect. For algae, divers counted each algae and counted the number of stipes in the organism.

For data access and methodology details for marine invertebrates, fish, and uniform point contact (UPC) data, see the "Related Datasets" section. These four datasets related to each other in the way that the information from algae, invertebrates, fish and UPC was taken from the same site, on the same date, done by the same person.

These four related datasets were collected following the same methodology. Each year from 2006 to 2021, certified divers will lay several 30m transects along kelp forest in different sites in Isla Natividad, Baja California Sur, Mexico. Along the transects, the divers will collect information of algae, invertebrates, fish and UPC (Uniform Point Contact). Each transect was done in one single dive, collecting all the information already mentioned. At the end of the collecting season, the data was checked and transferred to the main dataset.

Instruments:
SCUBA equipment
30m transects
Diving slates

Data Processing Description

All the data collected during the ecological monitoring was then transferred to excel files, where it was double checked for typos and errors. Every year since 2006, the data has been collected in one excel file.

BCO-DMO Processing

* File "COBI_Mexico_Algae_IslaNatividad_2006-2021_EnglishVersion.csv" imported into the BCO-DMO data system with missing data identifiers "NA" and "ND."
** Missing data values are displayed differently based on the file format you download. They are blank in csv files, "NaN" in MatLab files, etc.
* Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number
* Taxonomic names in this dataset were matched to known identifiers using the World Register of Marine Species (WoRMS) taxa match tool on 2023-09-05. A supplemental species list was added to this dataset containing the name used in the dataset, taxon name match information, and the associated LifeSciences Identifier (LSID) for the currently accepted name as of 2023-09-05.
* ISO_DateTime_UTC_Start column added in ISO 8601 format for UTC time zone using the supplied year, month, day, START_TIME (using "Mexico/BajaSur" UTC-7:00/-6:00). Time zone confirmed by submitter.
* There was an additional time issue where ID:"5 8 2013 Babencho 10" had start time as "32" and final "38"
and ID: "2 8 2014 Punta Prieta 18" had start time as "35" and final "43". Issue discussed with the submitter and the strategy agreed on to leave the rows in dataset but the "times" were replaced with null blank values.
* Two final times had additional :00 in the time. Since the rest of the column only reported HH:MM these were change from HH:MM:SS to HH:MM so the column could be typed correctly.
ID: "2 8 2020 La Guanera 16" final time "12:24:00" changed to "12:24"
ID: "24 9 2021 Babencho 3" final time 12:57:00 changed to "12:57"

Data Files

File
Ecological monitoring of algae on Isla Natividad from 2006 to 2021 filename: 907321_v1_isla_natividad_algae.csv (Comma Separated Values (.csv), 6.99 MB) MD5:a5be0302848530b8efb0442162387f84 Primary data file for dataset ID 907321, version 1

Supplemental Files

File

Algae Species List
filename: algae_species_list.csv

(Comma Separated Values (.csv), 852 bytes)
MD5:ac4ca57c08e589fd9aa93cd9a9a49f98

Species list for identifications in the algae transect data.  Includes columns:
ScientificName, Taxonomic name used in the dataset
AphiaID, The World Register of Marine Species (WoRMS) taxonomic identifier for the name in the dataset
Taxon_status, Status of the name in the dataset as of 2023-09-05. Indicates if the name is the currently accepted name or an unaccepted synonym
ScientificName_accepted, The accepted name (differs from ScientificName column if unaccepted synonym used there)
LSID_accepted_name, The Life Sciences Identifier (LSID) for the accepted name

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1736830

Deployments

None available yet

Instruments

None available yet

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
ID	identification number	unitless	individual
DAY	day when monitoring was conducted	unitless	day
MONTH	month when monitoring was conducted	unitless	month
YEAR	year when monitoring was conducted	unitless	year
STATE	State in Mexico: Baja California Sur	unitless	site_descrip
COMMUNITY	The community were the monitoring was done	unitless	site_descrip
SITE	The specific sites were monitoring was done	unitless	site
LAT	latitute	decimal degrees	lat
LONG	longitude	decimal degrees	lon
HABITAT	type of ecosystem where monitoring was conducted	unitless	site_descrip
ZONE	If it was a marine reserve or not: Control (not reserve), Reserve (marine reserve)	unitless	site_descrip
PROTECTION	If the site had any type of protection: none, community reserve, fishing refuge zone	unitless	site_descrip
MPA	If there is any type of marine protected area on a national level	unitless	site_descrip
DIVER	The person that did the monitoring	unitless	person
START_TIME	initial time of monitoring (HH:MM or HH) in Pacific Time Zone (UTC-8/-7)	unitless	time_local
FINAL_TIME	final time of monitoring (HH:MM or HH) in Pacific Time Zone (UTC-8/-7)	unitless	time_local
ISO_DateTime_UTC_Start	initial timestamp of monitoring in UTC time zone (ISO 8601 format) Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
START_DEPTH	initial depth	meters (m)	depth
FINAL_DEPTH	final depth	meters (m)	depth
TEMPERATURE	water temperature	degrees Celcius	temp
VISIBILITY	visibility description	meters (m)	site_descrip
CURRENT	current descritpion	unitless	site_descrip
TRANSECT	the number of transect of the monitoring	meters (m)	transect
GENUS	the genus of the species found along the transect on the monitoring	unitless	taxon
SPECIES	the species found along the transect on the monitoring	unitless	taxon
ABUNDANCE	quantity of each species counted along the transect on the monitoring (see DISTANCE column for transect length).	unitless	abundance
NUMBER_STIPES	number of stipes of algae counted in the transect (see DISTANCE for transect length)	unitless	count
DISTANCE	the length of the transect	meters (m)	len_track
EXTRAPOLATION	Extrapolated value of the ABUNDANCE of each species for a 30m transect. Values were calculated to correspond with a 30m sample distance using the formula ABUNDANCE*(DISTANCE/30) .	unitless	abundance
EXTRAPOLATION_GUIDES	Extrapolated value of the number of stipes of algae for a 30m transect. Values were calculated to correspond with a 30m sample distance using the formula NUMBER_STIPES*(DISTANCE/30) .	unitless	count

Database

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Dataset: Ecological monitoring Natividad 2006-2021: Algae