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Dry weight biomass measurements of net-collected mesozooplankton. Samples collected in the CCE-LTER region on Process Cruises from 2006 to the present. Summaries for each Lagrangian Cycle.

General Information
Data Package:
Local Identifier:edi.900.1
Title:Dry weight biomass measurements of net-collected mesozooplankton. Samples collected in the CCE-LTER region on Process Cruises from 2006 to the present. Summaries for each Lagrangian Cycle.
Alternate Identifier:DOI PLACE HOLDER
Abstract:
Mesozooplankton are collected with plankton nets (typically a 71-cm diameter, 202-um mesh Bongo net) and samples flash frozen at sea in liquid N2 for subsequent shore-based measurements of dry weight biomass. Measurements are made by weighing pre-tared Nitex mesh on an analytical balance, for mesozooplankton size-fractionated into 5 different categories (> 0.2 mm, 0.5 mm, 1.0 mm, 2.0 mm, 5.0 mm). Biomass is expressed as dry mass of zooplankton per m3 of water filtered, or when multiplied by the maximum depth of the tow, as integrated dry mass of zooplankton per m2 of sea surface. Samples for dry weight biomass have been collected on CCE-LTER Process Cruises since 2006 and these collections are ongoing.
Publication Date:2022-04-21
For more information:
Visit: DOI PLACE HOLDER

Time Period
Begin:
2006-05-01
End:
2017-06-30

People and Organizations
Contact:CCE LTER Information Manager (California Current Ecosystem LTER) [  email ]
Organization:California Current Ecosystem LTER
Creator:Ohman, Mark (SIO)

Data Entities
Data Table Name:
process_cruise_dry_weight_biomass
Description:
Dry weight biomass measurements of net-collected mesozooplankton. Samples collected in the CCE-LTER region on Process Cruises from 2006 to the present. Summaries for each Lagrangian Cycle.
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/900/1/bae5f69ae85cb7c8fe711fdb8c34fce3
Name:process_cruise_dry_weight_biomass
Description:Dry weight biomass measurements of net-collected mesozooplankton. Samples collected in the CCE-LTER region on Process Cruises from 2006 to the present. Summaries for each Lagrangian Cycle.
Number of Records:666
Number of Columns:13

Table Structure
Object Name:table_322.csv
Size:47123 byte
Authentication:ae0f1a90887abb967460da04f63bfa32
Character Encoding:ASCII
Text Format:
Number of Header Lines:1
Number of Foot Lines:0
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"
Literal Character:\

Table Column Descriptions
 
Column Name:studyName  
cruise  
cycle  
size_fraction  
day_night  
biomass_mean  
biomass_std  
biomass_n  
biomass_95cl  
int_biomass_mean  
int_biomass_std  
int_biomass_n  
int_biomass_95cl  
Definition:Sampling expedition from which data were collected, generated, etc.Cruise designations are "P" for Process Cruise, followed by a 2-digit year and 2-digit month. For example, P0605 is the Process Cruise that took place primarily in May 2006.Sequential Lagrangian CyclesSize Fraction of zooplankton sample considered (0.2-0.5 mm, 0.5-1.0 mm, 1.0-2.0 mm, 2.0-5.0 mm, > 5.0 mm, or Total [=all size fractions combined])Indication of whether samples are daytime (centered on 1000), nighttime (centered on 2200), or the average of day and night samplesMean zooplankton biomass per m3 for each Lagrangian Cycle, as dry massStandard deviation of zooplankton biomass per m3 for each Lagrangian Cycle, as dry massSample size of zooplankton biomass per m3 for each Lagrangian Cycle95% Confidence limit for zooplankton biomass per m3 for each Lagrangian Cycle, as dry massMean zooplankton biomass vertically integrated from the surface to the deepest sampling depth for each Lagrangian Cycle, as dry massStandard deviation of zooplankton biomass vertically integrated from the surface to the deepest sampling depth for each Lagrangian Cycle, as dry massSample size of zooplankton biomass vertically integrated from the surface to the deepest sampling depth for each Lagrangian Cycle95% Confidence limit of zooplankton biomass vertically integrated from the surface to the deepest sampling depth for each Lagrangian Cycle, as dry mass
Storage Type:string  
string  
integer  
string  
string  
float  
float  
integer  
integer  
float  
float  
integer  
float  
Measurement Type:nominalnominalnominalnominalnominalratiorationominalratioratiorationominalratio
Measurement Values Domain:
DefinitionSampling expedition from which data were collected, generated, etc.
DefinitionCruise designations are "P" for Process Cruise, followed by a 2-digit year and 2-digit month. For example, P0605 is the Process Cruise that took place primarily in May 2006.
DefinitionSequential Lagrangian Cycles
DefinitionSize Fraction of zooplankton sample considered (0.2-0.5 mm, 0.5-1.0 mm, 1.0-2.0 mm, 2.0-5.0 mm, > 5.0 mm, or Total [=all size fractions combined])
DefinitionIndication of whether samples are daytime (centered on 1000), nighttime (centered on 2200), or the average of day and night samples
UnitmilligramPerMeterCubed
Typereal
UnitmilligramsPerCubicMeter
Typereal
DefinitionSample size of zooplankton biomass per m3 for each Lagrangian Cycle
UnitmilligramPerMeterCubed
Typereal
UnitmilligramPerMeterSquared
Typereal
UnitmilligramPerMeterSquared
Typereal
DefinitionSample size of zooplankton biomass vertically integrated from the surface to the deepest sampling depth for each Lagrangian Cycle
UnitmilligramPerMeterSquared
Typereal
Missing Value Code:  
CodeNULL
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ExplNo data available
Accuracy Report:                          
Accuracy Assessment:                          
Coverage:                          
Methods:                          

Data Package Usage Rights

This data package is released to the public domain under Creative Commons CC0 1.0 No Rights Reserved (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein website” in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available as is and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
LTER Controlled Vocabularybiogeochemistry, biomass, carbon flux, grazing, zooplankton
CCE LTER KeywordsMesozooplankton

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package
Description:

Mesozooplankton sampling by Bongo net

Mesozooplankton are sampled with quantitative plankton nets, usually a 0.71-m diameter Bongo net frame, using the CalCOFI sampling protocol (https://cce.lternet.edu/data/methods-manual/augmented-cruises/calbobl-net-depolyment). However, unlike CalCOFI, we use 202-um Nitex mesh nets and hard cod ends with the same size mesh. A calibrated General Oceanics flow meter is mounted in the mouth of one net. Samples are typically double oblique (from surface to 210 m to surface; depth is based on 300 mwo with a 45° wire angle) or vertical (from surface to 100 m to surface; nominal 0° wire angle). A stainless steel weight (ca. 50 kg) is mounted to the bottom of the bongo frame. Samples from one side of the bongo net are preserved in sodium borate-buffered Formalin (final concentration of 5% Formalin = 1.85% formaldehyde). Samples from the other net are used for gut fluorescence and dry mass biomass determination. The latter samples are anesthetized with soda water immediately upon retrieval to inhibit net feeding and regurgitation. Both nets are carefully washed to ensure quantitative recovery of all sampled material.

Description:

Size fractionation and flash freezing samples

The anaesthetized zooplankton sample is taken promptly into a shipboad laboratory and split on a Folsom splitter to obtain 3/8 of the sample for gut fluorescence, 3/8 of the sample for dry biomass, and 1/4 of the sample for molecular probes. Samples are kept cool while processing. The gut fluorescence and the biomass aliquots are passed separately through a nested 5-filter series of Nitex sieves resulting in 5 size fractions (0.2-0.5 mm, 0.5-1.0 mm, 1.0-2.0 mm, 2.0-5.0 mm, > 5.0 mm). Each of these samples is concentrated on a 202 um mesh filter, placed in a labelled plastic petri dish, and flash frozen in liquid N2 for analysis ashore. Samples for dry weight biomass are filtered onto pre-tared 202-um mesh filters. After filtration, biomass samples are rinsed with isotonic ammonium formate to remove residual salts.

Description:

Laboratory analysis

Frozen Nitex filters are transferred to a drying oven, dessicated at 60° C for 24 hours, then the entire filter is weighed on an analytical balance. The difference between the sample weight and the tared filter weight is the total biomass in a sample. This value is then corrected for the fraction of the sample split and the volume of seawater filtered at sea, to express dry biomass as mg dry mass per m3 of seawater.

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@environmentaldatainitiative.org
Web Address:
https://environmentaldatainitiative.org
Id:https://ror.org/0330j0z60
Creators:
Organization:California Current Ecosystem LTER
Address:
California Current Ecosystem LTER Program Office Scripps Institution of Oceanography University of California, San Diego 9500 Gilman Dr.,
La Jolla, California 92093-0218 USA
Individual: Mark Ohman
Organization:SIO
Email Address:
mohman@ucsd.edu
Contacts:
Position:CCE LTER Information Manager
Organization:California Current Ecosystem LTER
Email Address:
ccelter.im@gmail.com
Metadata Providers:
Organization:California Current Ecosystem LTER
Address:
California Current Ecosystem LTER Program Office Scripps Institution of Oceanography University of California, San Diego 9500 Gilman Dr.,
La Jolla, California 92093-0218 USA

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period
Begin:
2006-05-01
End:
2017-06-30
Geographic Region:
Description:The California Current Ecosystem (CCE) LTER site is located off the southern coast of California, extending from San Diego north to San Luis Obispo and westward over 500 km. This area comprises an ecosystem that includes the California Current, which is the eastern current of the North Pacific Gyre.
Bounding Coordinates:
Northern:  37.84743Southern:  29.84637
Western:  -126.486Eastern:  -117.394

Project

Maintenance

Maintenance:
Description:Added geographic coverage information
Frequency:
Other Metadata

Additional Metadata

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Additional Metadata

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Additional Metadata

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