Dataset: Macroalgal growth and loss: understory blade growth

Name: Kelp understory blade growth data from macroalgal surveys in Sitka Sound, Alaska kelp beds from 2018 to 2019
Published: 2022-10-10
Keywords: macroalgae, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.882043.1

Spatial Extent: N:57.039 E:-135.278 S:56.9875 W:-135.357

Temporal Extent: 2018-07-20 - 2019-07-22

Project:

CAREER: Energy fluxes and community stability in a dynamic, high-latitude kelp ecosystem (High latitude kelp dynamics)

Principal Investigator:

Kristy J. Kroeker (University of California-Santa Cruz, UCSC)

Student:

Lauren E. Bell (University of California-Santa Cruz, UCSC)

Contact:

Lauren E. Bell (University of California-Santa Cruz, UCSC)

BCO-DMO Data Manager:

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

Version:

Version Date:

2022-10-10

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Kelp understory blade growth data from macroalgal surveys in Sitka Sound, Alaska kelp beds from 2018 to 2019

Abstract:

Kelp understory blade growth data from macroalgal surveys in Sitka Sound, Alaska kelp beds from 2018 to 2019.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2022-10-10	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.882043.1	2022-10-17

Methods & Sampling

We monitored monthly growth and loss of dominant kelp species in Sitka Sound from January 2017 - February 2018 at Breast Is. and Harris Is. (M. pyrifera only), and from July 2018 - July 2019 at Harris Is., Breast Is., and Samsing Pinnacle (M. pyrifera, N. fimbriatum, H. nigripes). At each site, we identified 12 - 15 “adult” individuals of each species (M. pyrifera: at least one frond reaching the surface; N. fimbriatum and H. nigripes: maximum blade length > 20 cm) along a 5 - 6 m depth (MLLW) contour with numbered tags. Each month, we re-surveyed tagged M. pyrifera plants for frond density, with zip ties loosely bound around new fronds exceeding 1 m in height to distinguish new growth. For tagged N. fimbriatum and H. nigripes plants, each month we punched a new hole through the thallus at 10 cm from the intercalary meristem (Parke 1948), and we measured blade morphometrics (maximum blade length and width) and distance from meristem to the previous month’s punched hole. When previously tagged individuals were not re-sighted after two consecutive months, we assumed they had been physically removed from the substrate, either through grazing or abiotic factors.

Additional Funding Details:
In addition to primary funding from the NSF award OCE-1752600 additional funding was provided from The David and Lucile Packard Foundation and the North Pacific Research Board’s Graduate Student Research Award (1748-01) to Lauren Bell, PhD University of California Santa Cruz, Award title: "Fish Habitat, Fishes and Invertebrates, Lower Trophic Level Productivity Effect of substrate on herring roe response to global change."

Data Processing Description

BCO-DMO Data Manager Processing Notes:
* File “HNIG.NFIM_blade.growth.csv” imported into the BCO-DMO data system.
* Date format changed to ISO format
* Species list with codes and scientific names extracted from parameter information. Matched to known taxon ids using WoRMS taxa match (2022-09-06). The spelling of "Laminaria setchelii" changed to "Laminaria setchellii" with two Ls after confirming the change with the data submitter. Species list along with identifiers attached as a supplemental data table.
* Latitude and Longitude added to main data table from the provided site list.

Data Files

File
blade_growth.csv (Comma Separated Values (.csv), 36.55 KB) MD5:c509e473841189a2ff63d1fbbde873f6 Primary data file for dataset ID 882043

Supplemental Files

File

Sitka macroalgal survey site list
filename: site_list.csv

(Comma Separated Values (.csv), 259 bytes)
MD5:785b37ebc9f99bea71257234529ad278

Site list for macroalgal surveys conducted in Sitka, Alaska between 2017 to 2020.

Parameters (column name, description, units):

Site, Site name,unitless

Latitude, latitude of site, decimal degrees 

Longitude,longitude of site, decimal degrees

Sitka macroalgal survey species list
filename: species_list.csv

(Comma Separated Values (.csv), 490 bytes)
MD5:983f490f673acb204083528f4f11e380

Species list for macroalgal surveys conducted in Sitka, Alaska between 2017 to 2020.

Parameters (column name, description, units):

Sp, species code used in related datasets (e.g. MPYR),unitless

ScientificName,The accepted scientific name for the species (as of 2022-09),unitless

AphiaID,Taxonomic identifier AphiaID for the species (see World Register of Marine Species),unitless

LSID,Life Sciences Identifier (LSID) for the species,unitless

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1752600

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
Site	Name of rocky reef location in Sitka Sound where survey occurred.	unitless	site
Latitude	Site latitude	decimal degrees	lat
Longitude	Site longitude	decimal degrees	lon
Transect	Identity of recurring 30 x 2 m transect in which surveyed plants were located (C-D)	unitless	transect
plant_ID	Alpha-numeric identifier for each tagged alga. Unique by site.	unitless	individual
date_T0	Date of survey period start (T0) in ISO 8601 format (YYYY-MM-DD) Format: %Y-%m-%d	unitless	date
date_T1	Date of survey period end (T1) in ISO 8601 format (YYYY-MM-DD) Format: %Y-%m-%d	unitless	date
dataquality_flag	Data quality identifier. [G = Good = Punched hole resighted without issue. F = fair = some grazing or deterioration of blade, but still trust growth data. P = poor = difficult to make out hole, data in question. Where hole enlarged by grazing and diver noted a possible range of where it could be, used conservative estimate (minimum growth), and noted as F]	unitless	q_flag
Sp	Species of understory macroalgae surveyed (NFIM = Neoagarum fimbriatum, HNIG = Hedophyllum nigripes)	unitless	taxon_code
maxlength_T0	Maximum blade length at survey period start (T0). Detection limit: 1cm	centimeters (cm)	length
maxwidth_T0	Maximum blade width at survey period start (T0). Detection limit: 1cm	centimeters (cm)	length
stipetohole_T0	Distance from intercalary meristem to punched hole at survey period start (T0). Detection limit: 0.1cm	centimeters (cm)	length
maxlength_T1	Maximum blade length at survey period end (T1). Detection limit: 1cm	centimeters (cm)	length
maxwidth_T1	Maximum blade width at survey period end (T1). Detection limit: 1cm	centimeters (cm)	length
stipetohole_T1	Distance from intercalary meristem to punched hole at survey period end (T1). Detection limit: 0.1cm	centimeters (cm)	length
Interval_days	Number of days elapsed between T0 and T1. Detection limit: 1 day	days	time_elapsed
holepastend_flag	Data quality identifier. Was punched hole missing at end of survey period (due to grazing or erosion of blade)? Y = yes, N = no	unitless	q_flag

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Dataset: Macroalgal growth and loss: understory blade growth