Dataset: Zooplankton bulk isotopes

Name: Bulk stable isotopes (d13C, d15N) of size-fractionated zooplankton collected near the Chatham Rise on the R/V Tangaroa SalpPOOP (TAN1810) cruise in Oct. and Nov. of 2018
Published: 2023-09-15
Keywords: zooplankton, Crustaceans, stable isotopes, Carbon, nitrogen, oceans

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Cite This Dataset

Spatial Extent: N:-42.6597 E:-179.843 S:-45.5498 W:179.853

Temporal Extent: 2018-10-23 - 2018-11-18

Project:

Collaborative Research: Quantifying trophic roles and food web ecology of salp blooms of the Chatham Rise (Salp Food Web Ecology)

Principal Investigator:

Michael R. Stukel (Florida State University, FSU)

Scientist:

Moira Decima (New Zealand National Institute of Water and Atmospheric Research, NIWA)

BCO-DMO Data Manager:

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

Version:

Version Date:

2023-09-15

Restricted:

Validated:

Current State:

Data not available

Bulk stable isotopes (d13C, d15N) of size-fractionated zooplankton collected near the Chatham Rise on the R/V Tangaroa SalpPOOP (TAN1810) cruise in Oct. and Nov. of 2018

Abstract:

This dataset presents bulk stable isotopes (13-carbon and 15-nitrogen) of size-fractionated zooplankton collected near the Chatham Rise on the SalpPOOP (TAN1810) cruise. The cruise focus was on studying the impact of salp blooms and marine biogeochemistry and food webs. Stable isotopes were measured to investigate trophic positions of zooplankton. Samples were collected by bongo tows and size-fractionated through nested sieves (4-mm, 2-mm, 1-mm, 0.5-mm, and 0.2-mm). Samples were then analyzed for bulk stable isotopes at the UC Davis stable isotope facility.

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Methods & Sampling

We conducted double oblique zooplankton net tows from 200 m water depth to the sea-surface using a 0.7 m-diameter Bongo frame with paired 200-µm mesh nets, equipped with two General Oceanics flow meters to measure the filtered volume and a temperature-depth recorder. A fraction of each tow was size-fractionated through nested sieves (4-mm, 2-mm, 1-mm, 0.5-mm, 0.2-mm), rinsed with isotonic ammonium formate, and stored for isotopic analyses. Samples were then dried, fumed with HCl (to remove calcium carbonate), packed in pre-combusted tins and analyzed for stable isotopes by isotope ratio mass spectrometer at the U.C. Davis Stable Isotope Facility.

Instruments:
Elementar Vario EL Cube or Micro Cube elemental analyzer (Elementar Analysensysteme GmbH, Hanau, Germany) interfaced to either an Isoprime VisION IRMS (Elementar UK Ltd, Cheadle, UK) or a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK)

BCO-DMO Processing

BCO-DMO Data Manager Processing Notes:
* Sheet 1 of file "SalpPOOP Size-fractionated Zooplankton Bulk Isotopes.xlsx" was imported into the BCO-DMO data system.
* Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number]
* lat lon columns added to the data table using locations provided in the "Zooplankton CSIA-AA" dataset (bcodmo dataset 908476 version 1). A join was performed using the Bongo_Tow,Station columns in both dataset to add the lat lon columns. Bongo_Tow 1 Station 4 was not present in the "Zooplankton CSIA-AA" so there are no lat lons values for that location in this dataset are null values in the data table.
* ISO_DateTime_UTC column added to the data from date and time columns provided as "NZST" which is UTC+12
* lat lons rounded to 5 decimal places.
* d13C and d15N columns rounded from 12 to 4 decimal places

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1756610
NSF Division of Ocean Sciences	OCE-1756465

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TAN1810	SalpPOOP	2018-10-23	R/V Tangaroa	Moira Decima (Chief Scientist)	data info

Instruments

Bongo Net

Supplied Name:

Supplied Description:

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

Elemental Analyzer

Supplied Name: Elementar Vario EL Cube or Micro Cube elemental analyzer (Elementar Analysensysteme GmbH, Hanau, Germany)

Supplied Description:

Elementar Vario EL Cube or Micro Cube elemental analyzer (Elementar Analysensysteme GmbH, Hanau, Germany) interfaced to either an Isoprime VisION IRMS (Elementar UK Ltd, Cheadle, UK) or a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK)

Instrument Type

Generic Name: Elemental Analyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB01/

Generic Description:

Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.

Mass Spectrometer

Supplied Name: PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK)

Supplied Description:

Instrument Type

Generic Name: Mass Spectrometer

Acronym: Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Bongo_Tow	Cruise Tow Identification Number	unitless	tow
Station	Cruise Station Identification Number	unitless	station
Cycle	Cruise Lagrangian Experiment Number	unitless	sample_descrip
Day	Day of Respective Lagrangian Experiment	Day	time_elapsed
Date	Date (NZST) Format: %Y-%m-%d	unitless	date_local
Time_In	Time of net deployment (NZST) Format: %H%M	unitless	time_local
ISO_DateTime_UTC	Net deployment timestamp in ISO 8601 format (UTC time) Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
Size_Fraction	Zooplankton Size Fraction	millimeters (mm)	samp_fraction
d13C	delta 13C	permil relative to PDVB (0/00 relative to PDVB)	d13C
d15N	delta 15N	permil relative to air (0/00 relative to air)	d15N
Latitude	Tow latitude	decimal degrees	lat
Longitude	Tow longitude	decimal degrees	lon

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Dataset: Zooplankton bulk isotopes