Dataset: GoM WBTS 2012-2013 Zooplankton abundance Columnar View
Deployment: GC_GoM_2012-2013

Zooplankton species abundance from ring nets at two times series stations in the Gulf of Maine - 2012-2013

Principal Investigator:

Contact:

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

RAPID: Effect of a Very Low NAO Event on the Abundance of the Lipid-Rich Planktonic Copepod, Calanus finmarchicus, in the Gulf of Maine (GoM_Calanus_2012-2013)

Current State:

Preliminary and in progress

Version:

working

Version Date:

2015-02-24

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/551943/data

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Description

Abundance of zooplankton species caught in 200 micron vertically-towed ring nets at two time series stations in the Gulf of Maine (2012-2013).

These data are presented in two views: This one has species abundance as columns with each species as its own column header. This one is levelized with the species as rows.

Incorporated into the species names in both cases are the life stages according to this scheme:
CI: Copepodid stage 1
CII: Copepodid stage 2
CIII: Copepodid stage 3
CIV: Copepodid stage 4
CV: Copepodid stage 5
F: Adult Female
M: Adult Male
N: Nauplii
C: Copepodids
LA: Larvae
BalanusC = Cyprid
VEL: Veliger
AD: Adult
EGG: Egg
FU: Furcilia
CA: Calyptopsis
Z: Zoea
MN: Metanauplius

DMO Notes:
Latitude and longitude of stations added
Spaces and periods (not allowed in column headers) fixed.
Added column for yrday_local to expand visualization possibilities.

Access Restrictions:

Users are requested to consult with Jeffrey Runge prior to preparation of any manuscripts or reports, either written or online, that make use of zooplankton and hydrographic data originating from this study. . The data are freely available without need for consultation with Dr. Runge after October, 2017.

Methods & Sampling

Dataset acquisition description

Sampling and Analytical Methodology:

These deployments followed the AZMP protocols (Mitchell et al. 2002) as a guideline. Using a 0.75 meter diameter SEA-GEAR Model 9600 twin ring, 200µm mesh net, two vertical casts were made to within 5 meters of the bottom at each station. Two replicate samples from separate casts were preserved in a 4% seawater-buffered formaldehyde solution. In the laboratory, all formalin preserved zooplankton samples were split in half using a Folsom Plankton Splitter. Half of the sample was archived for identification and enumeration of zooplankton, and the other half was processed for biomass determination. To estimate abundances the archival split was diluted and sub-sampled with a 5 mL Stempel pipette. Depending on abundance in the sample, multiple subsamples were taken until a target number of 75-150 C. finmarchicus copepodids were enumerated and staged and in addition at least 200 specimens in total were counted and identified to the lowest possible taxa.

Mitchell, M. R., G. Harrison, K. Pauley, A. Gagné, G. Maillet, and P. Strain. (2002) Atlantic Zonal Monitoring Program Sampling Protocol. Canadian Technical Report of Hydrography and Ocean Sciences 223.

Data Processing Description

Dataset Processing Description

Data Processing:

The counts were normalized to abundance (number m^-2), taking into account the subsample dilution, the split, and volume sampled by the net at the station. Because of unreliable flowmeter readings we calculated volume filtered by the net from net area and net depth. The filtered volume calculated geometrically, as we have done here, is closely related to the flowmeter volume when flowmeters were working properly.

Volume = Net Depth * Net Area

Abundance (number m^-2) = ( (count*Dilution Factor / Archival split) / Volume) *Station Depth

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1235920	NSF Division of Ocean Sciences

Instruments

Ring Net

Supplied Description:

This experiment used a 0.75 meter diameter SEA-GEAR Model 9600 twin ring, 200 micron mesh.

Instrument Type

Generic Name: Ring Net

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/22/

Generic Description:

A Ring Net is a generic plankton net, made by attaching a net of any mesh size to a metal ring of any diameter. There are 1 meter, .75 meter, .25 meter and .5 meter nets that are used regularly. The most common zooplankton ring net is 1 meter in diameter and of mesh size .333mm, also known as a 'meter net' (see Meter Net).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
station	WB-5 or WB-7	text	station
latitude	latitude	decimal degrees; North is positive	lat
longitude	longitude	decimal degrees; West is negative	lon
cruise	each deployment has its own cruise ID following this format: GC for R/V Gulf Challenger; followed by the date (mmddyy)	text	cruise_id
date_local	date local time	mmddyyyy	date_local
month_local	month local time	mm	month_local
day_local	day local time	dd	day_local
year	year	yyyy	year
yrday_local	day of year local time	number	yrday_local
depth_net	depth of the ring net according to length of wire out of the winch; as read by a meter wheel	meters	depth
depth_w	water depth at the station according to depth sounder on vessel	meters	depth_w
dilution	dilution factor = (water volume the sample is diluted into/volume of water subsampled)	no units	no_bcodmo_term
species	Individual species names: genus and species binomial identification of the animal collected; includes life stage (see dataset description for explanation)	text	species
abundance	abundance in the water column	numbers per square meter	abundance

Database

Contribute Data

Dataset: GoM WBTS 2012-2013 Zooplankton abundance Columnar View
Deployment: GC_GoM_2012-2013

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: GoM WBTS 2012-2013 Zooplankton abundance Columnar ViewDeployment: GC_GoM_2012-2013

Dataset acquisition description

Dataset Processing Description

Dataset: GoM WBTS 2012-2013 Zooplankton abundance Columnar View
Deployment: GC_GoM_2012-2013