Dataset: SECM_zoop
Deployment: jc0304b

Zooplankton counts for the Southeast Alaska Coastal Monitoring

Co-Chief Scientist:

Emily A. Fergusson (National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center, NOAA-AFSC-Auke)

Joseph A Orsi (National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center, NOAA-AFSC-Auke)

Molly V. Sturdevant (National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center, NOAA-AFSC-Auke)

Lead Principal Investigator:

Joseph A Orsi (National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center, NOAA-AFSC-Auke)

Alex C. Wertheimer (National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center, NOAA-AFSC-Auke)

Data Manager:

Emily A. Fergusson (National Oceanic and Atmospheric Administration - Alaska Fisheries Science Center, NOAA-AFSC-Auke)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

U.S. GLOBEC Northeast Pacific (NEP)

Current State:

Final no updates expected

Version:

SECM_dec_2007.mdb from H. Batchelder, {date}

Version Date:

2010-05-24

Data URL:

https://www.bco-dmo.org/dataset-deployment/453358/data

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Description

Zooplankton counts from net tows taken in conjunction with juvenile salmon studies in the Gulf of Alaska from 1997-2006 by the Southeast Coastal Monitoring Project. Measurements include settling volume, displacement volume, composition of taxa.

important links:
http://www.afsc.noaa.gov/ABL/MSI/msi_secm.htm

Also see related SECM datasets:
station data
nutrients
ctd
fish catch data
fish length and stomach contents

Methods & Sampling

Dataset acquisition description

Surface (bucket) and 20-m (Niskin bottle) water samples were taken once at each station for later nutrient and chlorophyll analysis.

One shallow vertical haul (20-m) was made at each station (except three at ABM) with a 50-cm, 243-micron mesh NORPAC net. One deep vertical haul (to 200 m or within 10 m of bottom) was made at ABM and the Icy Point stations with a 57-cm, 202-micron mesh WP-2 net.

One double oblique bongo haul was made at stations along the Icy Strait and Lower Clarence Strait transects and at ABM to a depth of 200 m or within 20 m of the bottom, using a 60-cm diameter tandem frame with 505-micron and 333-micron mesh nets. A VEMCO ML-08-TDR time-depth recorder was used with the oblique bongo hauls to record the maximum sampling depth of each haul. General Oceanics model 2031 or Rigosha flow meters were placed inside the bongo and deep conical nets for calculation of filtered water volumes.

Zooplankton sampling: Zooplankton samples were concentrated and preserved in a 5% formalin-seawater solution. Zooplankton settled volumes (ZSV, ml) and total settled volumes (TSV, ml) of each 20-m vertical haul were measured after settling the samples for a 24-hr period in Imhof cones. Displacement volumes (DV, ml) of zooplankton were measured for bongo net samples (333-micron and 505-micron mesh). Samples were brought to a constant volume (500 ml) by adding water, and then were sieved through 243-micron mesh to separate the zooplankton from the liquid. The volume of decanted liquid was measured and subtracted from the sample starting volume to yield zooplankton DV.

Station Codes:

station	locality
ABM	Auke Bay Monitor
CS A-D	Cross Sound
ED A-D	Cape Edward
FPR	False Point Retreat
IP A-D	Icy Point
IS A-D	Icy Strait
LC A-D	Lower Clarence
LFC	Lower Favorite Channel
MC A-D	Middle Clarence
TK G-I	Taku Inlet transect
UC A-D	Upper Chatham Strait

Data Processing Description

Dataset Processing Description

Detailed zooplankton species composition was determined microscopically from subsamples obtained using a Folsom or Motoda splitter. Density was then estimated by multiplying the count in the subsample by the split fraction and dividing the expanded count by the volume filtered. Percent total composition was summarized by major taxa for region, habitat, and month. Species were pooled into taxonomic groups including small calanoid copepods (< 2.5 mm TL), large calanoid copepods (> 2.5 mm TL), barnacle larvae, euphausiids (principally larval and juvenile stages), oikopleurans (Larvacea), decapod (crab) larvae, amphipods (hyperiid and gammarid), gastropods (primarily pteropods), chaetognaths, and combined minor taxa.

Use constraints: User must read and fully comprehend the metadata prior to use. User must acknowledge the Originator when using the data set as a source. User must share data products developed using the source data set with the Originator. Data should not be used beyond the limits fo the source scale.

01 Oct 2012 - BCO-DMO separated original 'taxon' column into taxon, species, stage, and common_name.

More information about this dataset deployment

Funding

Award Number	Funding Source
unknown NEP NOAA	National Oceanic and Atmospheric Administration
unknown NEP NSF OCE	NSF Division of Ocean Sciences

Instruments

Bongo Net

Supplied Name: Bongo Nets

Supplied Description:

60-cm diameter tandem frame with 505-µm and 333-µm mesh nets. A VEMCO ML-08-TDR time-depth recorder was used with the oblique bongo hauls to record the maximum sampling depth of each haul. General Oceanics model 2031 or Rigosha flow meters were placed inside the bongo and deep conical nets for calculation of filtered water volumes.

Instrument Type

Generic Name: Bongo Net

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0009/

Generic Description:

A Bongo Net consists of paired plankton nets, typically with a 60 cm diameter mouth opening and varying mesh sizes, 10 to 1000 micron. The Bongo Frame was designed by the National Marine Fisheries Service for use in the MARMAP program. It consists of two cylindrical collars connected with a yoke so that replicate samples are collected at the same time. Variations in models are designed for either vertical hauls (OI-2500 = NMFS Pairovet-Style, MARMAP Bongo, CalVET) or both oblique and vertical hauls (Aquatic Research). The OI-1200 has an opening and closing mechanism that allows discrete "known-depth" sampling. This model is large enough to filter water at the rate of 47.5 m3/minute when towing at a speed of two knots. More information: Ocean Instruments, Aquatic Research, Sea-Gear

CTD Sea-Bird SEACAT 19

Supplied Name: CTD Seabird 19

Supplied Description:

The CTD data were collected with a Sea-Bird1 SBE 19 Seacat profiler to 200 m or within 10 m of the bottom.

Instrument Type

Generic Name: CTD Sea-Bird SEACAT 19

Acronym: CTD SBE 19

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0042/

Generic Description:

The Sea-Bird SBE 19 SEACAT Recorder measures conductivity, temperature, and pressure (depth). The SEACAT is self-powered and self-contained and can be deployed in profiling or moored mode. The SBE 19 SEACAT was replaced in 2001 by the 19plus. more information from Sea-Bird Electronics

Niskin bottle

Supplied Name: Niskin Bottle

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Radiometer

Supplied Description:

To quantify ambient light levels, light intensities (W* m-2) were recorded at each station with a Li-Cor Model 189 radiometer.

Instrument Type

Generic Name: Radiometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/122/

Generic Description:

Radiometer is a generic term for a range of instruments used to measure electromagnetic radiation (radiance and irradiance) in the atmosphere or the water column. For example, this instrument category includes free-fall spectral radiometer (SPMR/SMSR System, Satlantic, Inc), profiling or deck cosine PAR units (PUV-500 and 510, Biospherical Instruments, Inc). This is a generic term used when specific type, make and model were not specified.

Thermosalinograph

Supplied Description:

Surface (3-m) temperature and salinity data were collected at 1-minute intervals with an onboard thermosalinograph (Sea-Bird SBE 21).

Instrument Type

Generic Name: Thermosalinograph

Acronym: TSG

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/133/

Generic Description:

A thermosalinograph (TSG) is used to obtain a continuous record of sea surface temperature and salinity. On many research vessels the TSG is integrated into the ship's underway seawater sampling system and reported with the underway or alongtrack data.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
bottle	sample bottle number	integer	bottle
comments_sample	comments pertaining to the haul or bottle	text	no_bcodmo_term
comments_taxon	comments pertaining to the zooplankton	text	no_bcodmo_term
count	number of individuals counted in sample fraction	integer	count
day_local	day of month	integer	day_local
depth	maximum depth of net haul (off TDR if available; otherwise calculated from wire out)	meters	depth
disp_vol_zoop	displacement volume	milliliters	disp_vol
fraction	split fraction	fraction	no_bcodmo_term
fraction_dec	split fraction as decimal	decimal number	no_bcodmo_term
haul_id	haul number	integer	no_bcodmo_term
inst	zooplankton net type (NORPAC; WP-2; BONGO)	text	instrument
lat	latitude of station, North is positive.	decimal degrees	lat
lon	longitude of station; East is positive.	decimal degrees	lon
mesh	zooplankton net mesh (243; 202; 333; 505)	microns	no_bcodmo_term
month_local	month of year	1-12	month_local
station	station code	text	station
sv_phyto	phytoplankton settled volume	milliliters	no_bcodmo_term
sv_total	total settled volume of sample	milliliters	no_bcodmo_term
sv_zoop	zooplankton settled volume	milliliters	no_bcodmo_term
time_local	time of day	local time	time_local
year	year of sampling	YYYY	year
yrday_local	local day and decimal time	as 326.5 for the 326th day of the year	yrday_local
region	Northern (NSE) or Southern (SSE) Southeast Alaska.	text	region
depth_w	depth of water at this site	meters	depth_w
lat_haul	latitude at start of haul; North is positive	decimal degrees	lat
lon_haul	longitude at start of haul, W is negative	decimal degrees	lon
taxon	High-level taxonomic identification.	text	taxon
cruise_id	cruise identification: jc=John Cobb; next two numbers = year; last 2 numbers = cruise # ('x' means cruise # is not known)	text	cruise_id
species	Species name (or genus and species).	text	species
stage	Stage/sex/size.	text	stage
common_name	Common name of the organism.	text	common_name

Database

Contribute Data

Dataset: SECM_zoop
Deployment: jc0304b

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: SECM_zoopDeployment: jc0304b

Dataset acquisition description

Dataset Processing Description

Dataset: SECM_zoop
Deployment: jc0304b