Dataset: Zooplankton Densities
Deployment: CB979

Zooplankton densities by species and life stage in a seasonally hypoxic fjord.

Principal Investigator:

Julie E. Keister (University of Washington, UW)

Co-Principal Investigator:

Timothy Essington (University of Washington, UW)

John K. Horne (University of Washington, UW)

Sandra Parker-Stetter (Northwest Fisheries Science Center - Seattle, NOAA NWFSC)

Contact:

Julie E. Keister (University of Washington, UW)

BCO-DMO Data Manager:

Hannah Ake (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Consequences of hypoxia on food web linkages in a pelagic marine ecosystem (PelagicHypoxia)

Current State:

Final no updates expected

Version:

Final

Version Date:

2017-02-08

Data URL:

https://www.bco-dmo.org/dataset-deployment/682085/data

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Description

Depth-stratified zooplankton net sampling in Hood Canal June to October, 2012-2013.

Methods & Sampling

Dataset acquisition description

We conducted day/night paired zooplankton sampling in Hood Canal in June-October, 2012 and 2013. Sampling stations included Dabob, Union, Hoodsport, Duckabush, and Twanoh. A Hydrobios MultiNet (five-net capacity) was used to collect depth-stratified and full water column samples. Net mouth area was 0.25 m2; 200- and 335-um mesh nets were used to sample different size zooplankton. Nets were towed obliquely at 1-2.5 knots (slower tows for smaller mesh size), with inner and outer flow meters to measure water volume sampled. For the depth-stratified sampling, depth layers were based on the dissolved oxygen profiles from CTD casts.

In the laboratory, zooplankton were quantitatively subsampled and microscopically counted. All individuals were identified to species or larger taxonomic grouping, and by life stages for some species, within each sample.

Data Processing Description

Dataset Processing Description

Densities (#/m3) were calculated by species and life stage from each net.

BCO-DMO Data Processing Notes:
-Replaced spaces with underscores.
-Added ISO_DateTime_UTC column.
-Filled blank cells with "nd"
-Reformatted time to 24 hour time.
-Replaced commas with semicolons.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1154648	NSF Division of Ocean Sciences

Instruments

MultiNet

Supplied Name: Hydrobios MultiNet (five-net capacity)

Supplied Description:

Used to collect water column samples

Instrument Type

Generic Name: MultiNet

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0099/

Generic Description:

The MultiNet© Multiple Plankton Sampler is designed as a sampling system for horizontal and vertical collections in successive water layers. Equipped with 5 or 9 net bags, the MultiNet© can be delivered in 3 sizes (apertures) : Mini (0.125 m2), Midi (0.25 m2) and Maxi (0.5 m2). The system consists of a shipboard Deck Command Unit and a stainless steel frame to which 5 (or 9) net bags are attached by means of zippers to canvas. The net bags are opened and closed by means of an arrangement of levers that are triggered by a battery powered Motor Unit. The commands for actuation of the net bags are given via single or multi-conductor cable between the Underwater Unit and the Deck Command Unit. Although horizontal collections typically use a mesh size of 300 microns, mesh sizes from 100 to 500 may also be used. Vertical collections are also common. The shipboard Deck Command Unit displays all relevant system data, including the actual operating depth of the net system.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE 43

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor

Acronym: SBE-43 DO

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/

Generic Description:

The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
sample_code	PI issued sample ID; sampling date + Station + D (day ) or N (night) + Net code (e.g. m1) _mesh	unitless	sample
date	Date sample was collected; Local time (PDT); YYYYMMDD	unitless	date
time_start	Start time of sampling; HH:MM	unitless	time_start
station	Station code where sampling occurred; DB=Dabob; UN=Union; HP=Hoodsport; DU=Duckabush; TW=Twanoh.	unitless	station
day_night	Indication of whether sampling occurred at day or night.	unitless	no_bcodmo_term
mesh_size	Size of mesh used in sampling.	microns	filter_size
depth_max	Maximum depth sampled.	meters	depth_max
depth_min	Minimum depth sampled.	meters	depth_min
FWC_DS	Full whole column (FWC) sampling or depth-stratified (DS) sampling	unitless	no_bcodmo_term
species	Species sampled	unitless	species
life_history_stage	Description of life history stage at which sample was found	unitless	stage
density	Density of species sampled	count per meter cubed	density
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted	yyyy-MM-dd'T'HH:mm:ss	ISO_DateTime_UTC
lat	Latitude; N is positive	decimal degrees	lat
lon	Longitude; S is positive	decimal degrees	lon

Database

Contribute Data

Dataset: Zooplankton Densities
Deployment: CB979

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Zooplankton DensitiesDeployment: CB979

Dataset acquisition description

Dataset Processing Description

Dataset: Zooplankton Densities
Deployment: CB979