Dataset: 2018 Ross Sea Zooplankton Abundance: Ring net
Deployment: NBP1801

2018 Ross Sea Zooplankton Abundance: ring net

Principal Investigator:

Grace Saba (Rutgers University)

BCO-DMO Data Manager:

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

Project:

Using Bio-acoustics on an Autonomous Surveying Platform for the Examination of Phytoplankton-zooplankton and Fish Interactions in the Western Ross Sea (bio-acoustic plankton surveys)

Deployment Synonyms:

CICLOPS, Cobalamin and Iron Co-Limitation Of Phytoplankton Specie

Data URL:

https://www.bco-dmo.org/dataset-deployment/789437/data

Expand/Collapse All

Description

Net tows were conducted during the R/V Nathaniel B. Palmer cruise NBP18-01 in Jan-Feb 2018. These data represent the zooplankton species and abundance analysis resulting from these sample collections. A companion dataset of mid-water trawls abundances is also available.

Methods & Sampling

Dataset acquisition description

Sample collection: Net tows and mid-water trawls were conducted in the western Ross Sea, Antarctica on board the R/V Nathaniel B. Palmer in January-February 2018 (cruise number 18-01). Both the ring net (1 m diameter, 333 um mesh, non-filtering cod end) and the Issacs-Kidd Midwater Trawl (IKMT, 1.8 m frame, 500 um mesh, non-filtering cod end) were fitted with a calibrated General Oceanics flow meter. Contents of each tow were concentrated and preserved with buffered formaldehyde (4% final concentration) in 500 ml wide-mouth glass jars. Samples were sent back to the home laboratory (Rutgers University) for analysis.

Analyses: Contents of each tow (or a subsample if the density of zooplankton or fish was high) were sorted by taxa and, in some cases, developmental stage. Measurements for abundance were conducted using a dissecting microscope (Zeiss Discovery.V8).

Volume of water (cubic meter) that passed through the net/trawl during each tow was calculated using flowmeter rotor constant, flowmeter start and end values, and the area of net opening.

Abundance per cubic meter per tow/trawl was then calculated for each species and, in some cases, developmental stage, by dividing the number of individuals for each species/developmental stage by the volume of water.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Notes:
version 1:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- in Method column, replaced commas with semicolons
- two columns were named 'Latitude end'; renamed second one 'Longitude end' as it's clearly a longitude.
- converted latitudes and longitudes to decimal degrees
- reformated date and times to ISO-format (from m/d/yy to yyyy-mm-ddTHH:MM:SSZ)
- corrected mis-spelled taxa:

Oithoha similis -> Oithona similis
Calanus simulus -> Calanus simillimus
Pareuchaeta antarctica -> Paraeuchaeta antarctica
Gaidus tenuispinus -> Gaidius tenuispinus
Heterohabdum -> Heterorhabdus
Pelagchia longicirrata -> Pelagobia longicirrata
Schyphomedusa -> Scyphomedusa

version 2:
- corrected ISO_DateTime_UTC by removing an extra ":00" at end of the string (eg. 2018-01-10T02:04:00:00Z)

More information about this dataset deployment

Funding

Award Number	Funding Source
OPP-1743035	NSF Office of Polar Programs (formerly NSF PLR)

Instruments

Isaacs-Kidd Midwater Trawl

Supplied Name: Isaacs-Kid Midwater Trawl

Supplied Description:

Rectangle framed net (1.75 m x 1.44 m) with 500 um mesh and a non-filtering cod end. Used to collected zooplankton during the Ross Sea cruise.

Instrument Type

Generic Name: Isaacs-Kidd Midwater Trawl

Acronym: IKMT

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0071/

Generic Description:

A trawl with a pentagonal mouth opening and a dihedral depressor vane as part of the mouth opening. IKMTs come in various dimensions (refer to individual dataset documentation).

The original IKMTs were 10 foot (304 cm) and 15 foot (457 cm) at the mouth. The 10 foot IKMT net was 31 feet (9.45 m) in length (Wiebe and Benfield 2003).

Microscope - Optical

Supplied Name: Zeiss Discovery V8 Dissecting microscope

Supplied Description:

Optical microscope with magnification for observation of the Ross Sea cruise tow/trawl samples. Used to taxonomically identify and count collected zooplankton during the Ross Sea cruise.

Instrument Type

Generic Name: Microscope - Optical

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB05/

Generic Description:

Instruments that generate enlarged images of samples using the phenomena of reflection and absorption of visible light. Includes conventional and inverted instruments. Also called a "light microscope".

Ring Net

Supplied Name: ring net

Supplied Description:

Plankton net with 1 m diameter, 333 um mesh, non-filtering cod end. Used to collected zooplankton during the Ross Sea cruise.

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
Method	Collection method specified; either a 1-m diameter ring net with 333um mesh or an Isaacs Kidd Midwater Trawl with a 1.8-m frame	unitless	instrument
Tow_Trawl_number	Tow/Trawl number provided in chronological order during the cruise	unitless	tow
ISO_DateTime_UTC_start	Time the tow/trawl started	unitless	time_start
ISO_DateTime_UTC_end	Time the tow/trawl ended	unitless	time_end
lat_start_decdeg	Latitude/Location where the tow/trawl started	decimal degrees	lat_start
lon_start_decdeg	Longitude/Location where the tow/trawl started	decimal degrees	lon_start
lat_end_decdeg	Latitude/Location where the tow/trawl ended	decimal degrees	lat_end
lon_end_decdeg	Longitude/Location where the tow/trawl ended	decimal degrees	lon_end
Net_depth_m	Water depth the ring net or trawl were towed	meters	depth
Bottom_depth_m	Water depth at location of tow/trawl	meters	depth_w
SST_deg_C	Sea Surface Temperature at time and location of tow/trawl	Degrees Celsius	SST
Flowmeter_start	Calibrated General Oceanics flowmeter reading at start of tow/trawl; used in calculations for water volume that passed through the net/trawl	unitless	flow
Flowmeter__end	Calibrated General Oceanics flowmeter reading at end of tow/trawl; used in calculations for water volume that passed through the net/trawl	unitless	flow
Volume_m3	Volume of water that passed through the net/trawl; calculated using flowmeter data and area of net opening	cubic meters	vol_filt
Copepods_Calanoides_acutus	Abundance of Calanoides acutus	number/meter^3	abundance
C_acutus_CIII_to_V	Abundance of Calanoides acutus stages CIII to V	number/meter^3	abundance
Metridia_gerlachei	Abundance of Metridia gerlachei	number/meter^3	abundance
Oithona_similis	Abundance of Oithona similis	number/meter^3	abundance
Calanus_simillimus	Abundance of Calanus simillimus	number/meter^3	abundance
Paraeuchaeta_antarctica	Abundance of Paraeuchaeta antarctica	number/meter^3	abundance
Oncaea_sp	Abundance of Oncaea sp.	number/meter^3	abundance
Gaidius_tenuispinus	Abundance of Gaidius tenuispinus	number/meter^3	abundance
Heterorhabdus_sp	Abundance of Heterorhabdus sp.	number/meter^3	abundance
Unspecified_Nauplii	Abundance of unspecified nauplii	number/meter^3	abundance
Euphausiids_Euphausia_crystallorophias	Abundance of Euphausia crystallorophias	number/meter^3	abundance
Thysanoessa_macrura	Abundance of Thysanoessa macrura	number/meter^3	abundance
Decapods_Notocrangon_antarcticus	Abundance of Notocrangon antarcticus	number/meter^3	abundance
Amphipods_Themisto_gaudichaudii	Abundance of Themisto gaudichaudii	number/meter^3	abundance
Hyperoche_sp	Abundance of Hyperoche sp.	number/meter^3	abundance
Vibilia_stebbingi	Abundance of Vibilia stebbingi	number/meter^3	abundance
Pteropods_Limacina_rangii	Abundance of Limacina rangii	number/meter^3	abundance
Clione_limacina_antarctica	Abundance of Clione limacina antarctica	number/meter^3	abundance
Polychaeta_Pelagobia_longicirrata	Abundance of Pelagobia longicirrata	number/meter^3	abundance
Polychaete_larvae	Abundance of polychaete larvae	number/meter^3	abundance
Fish_Pleuragramma_antarctica_larvae	Abundance of Pleuragramma antarctica larvae	number/meter^3	abundance
Pleuragramma_antarctica_juvenile	Abundance of Pleuragramma antarctica juveniles	number/meter^3	abundance
Channichthyidae	Abundance of Channichthyidae	number/meter^3	abundance
Artedidraconidae	Abundance of Artedidraconidae	number/meter^3	abundance
Other_Ostracods	Abundance of other ostracods	number/meter^3	abundance
Chaetognatha	Abundance of Chaetognatha	number/meter^3	abundance
Ctenophora	Abundance of Ctenophora	number/meter^3	abundance
Scyphozoa	Abundance of Scyphomedusa	number/meter^3	abundance
Siphonophore	Abundance of Siphonophora	number/meter^3	abundance
Salpidae	Abundance of Salpa	number/meter^3	abundance

Database

Contribute Data

Dataset: 2018 Ross Sea Zooplankton Abundance: Ring net
Deployment: NBP1801

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: 2018 Ross Sea Zooplankton Abundance: Ring netDeployment: NBP1801

Dataset acquisition description

Dataset Processing Description

Dataset: 2018 Ross Sea Zooplankton Abundance: Ring net
Deployment: NBP1801