http://lod.bco-dmo.org/id/dataset/956590
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2025-03-19
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Size fractionated mesozooplankton biomass, elemental and stable isotope measurements derived from plankton net tows conducted on R/V Roger Revelle cruise RR2201 (BLOOFINZ-IO) in the Argo Basin region off NW Australia during January-March 2022
2025-03-28
publication
2025-03-28
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2025-03-28
publication
https://doi.org/10.26008/1912/bco-dmo.956590.1
Michael R. Landry
University of California-San Diego Scripps
principalInvestigator
Moira Decima
University of California-San Diego Scripps
principalInvestigator
Rasmus Swalethorp
University of California-San Diego Scripps
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Swalethorp, R., Decima, M., Landry, M. R., Cawley, G., Traboni, C., Kim, L. (2025) Size fractionated mesozooplankton biomass, elemental and stable isotope measurements derived from plankton net tows conducted on R/V Roger Revelle cruise RR2201 (BLOOFINZ-IO) in the Argo Basin region off NW Australia during January-March 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-03-28 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.956590.1 [access date]
BLOOFINZ-IO Mesozooplankton biomass and isotopes Dataset Description: Methods and Sampling: <p>This dataset is derived from mesozooplankton net tows in the Indian Ocean Argo Basin off Northwestern Australia carried out from the R/V Roger Revelle cruise in January to March 2022, which were part of an NSF-OCE project (aka: BLOOFINZ-IO) led by Prof. Michael R. Landry to investigate the epipelagic marine nitrogen cycle, plankton dynamics, and impacts on growth and survival of larval Southern Bluefin Tuna (SBT). The cruise report can be found at <a href="http://hdl.handle.net/1834/43464" target="_blank">http://hdl.handle.net/1834/43464</a>. These data are meant to be used in inter-species, interregional comparisons to data from the BLOOFIN-GoM study of larval Atlantic Bluefin Tuna (ABT) in the Gulf of Mexico spawning region.</p>
<p>Oblique net tows were taken to obtain estimates of mesozooplankton standing stocks and grazing over the depth range of the upper mixed layer and the full euphotic zone. Generally, we sampled during midday (1000-1200 h) and midnight (2100-0300 h) hours repeatedly over 3-4 days following a drogued drifter (termed "Cycles"), allowing estimates of diel vertical migrant biomass by difference within the same water parcel. Additional transect stations were also sampled at variable times of the day. We used a 1-meter (m) diameter ring net with a 202-micrometer (µm) mesh size to sample the full euphotic zone, and a 60-centimeter (cm) diameter Bongo (aka: Bongo-60) net with one net having a 202-µm mesh size and the other a 50-µm mesh size to sample the upper mixed layer. All nets were Nitex mesh and fitted with General Oceanics flow meters in the center of the opening to measure volume filtered. Depth of tow was controlled by a depth sensor on the hydrowire and exact depths recorded by a depth logger fitted to the net frames. Net tow contents from the Ring net and Bongo-60 202-µm mesh sized nets were anesthetized with ice-cold carbonated water and split with a Folsom splitter, with half preserved in 4% buffered formalin and half further split into two quarters. Each quarter was size-fractionated using nested sieves into five size classes: 0.2-0.5, 0.5-1, 1-2, 2-5, and &gt;5 millimeters (mm). In the quarter dedicated for measuring biomass, each size fraction was concentrated on a preweighed 202-µm Nitex filter, rinsed with isotonic ammonium formate to remove sea salt, dried at 60 degrees Celsius (°C), and stored dry in sealed containers with desiccant. The other quarter was dedicated to measuring gut pigments for estimating mesozooplankton grazing. Net content from the Bongo-60 50-µm mesh sized net was treated similarly except that half was preserved in formalin, and half split into 0.05-0.1, 0.1-0.2, and &gt;0.2 mm size fractions using nested sieves and dried for measuring biomass.</p>
<p>In the laboratory, dry filters were weighed on an analytical balance and filter preweights subtracted to calculate zooplankton dry weight for each size fraction. Zooplankton dry weight in milligrams per square meter (mg m-2) was calculated from the measured volume, depth of tow, and fraction of sample analyzed. The dried sample was subsequently scraped off the filter, ground to a powder with a mortar and pestle, and subsampled by weight for carbon (C), nitrogen (N), and stable isotope (13C and 15N) analyses.</p>
<p>CN subsamples were weighed in small tin boats, packed into pellets, and analyzed by a standard elemental analyzer, isotope ratio mass spectrometry (EA-IRMS) at the Stable Isotope Facility at University of California, Davis (<a href="https://stableisotopefacility.ucdavis.edu/" target="_blank">https://stableisotopefacility.ucdavis.edu/</a>). The system consists of a PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). Acetanilide, USGS41, and facility internal standards was used for instrument stability and corrections for both elemental and isotopic measurements on every run. C and N biomass estimates (mg m-2) were computed for each size fraction from C:DW and N:DW ratios. Stable isotope values are reported in standard delta (‰) notation relative to atmospheric N2 and Vienna Pee Dee Belemnite for carbon.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1851558 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1851558
completed
Michael R. Landry
University of California-San Diego Scripps
858-534-4702
9500 Gilman Drive Mail Code: 0227
La Jolla
CA
92093-0227
USA
mlandry@ucsd.edu
pointOfContact
Moira Decima
University of California-San Diego Scripps
858-246-4710
9500 Gilman Dr #0218
La Jolla
CA
92093-0218
USA
mdecima@ucsd.edu
pointOfContact
Rasmus Swalethorp
University of California-San Diego Scripps
858-951-7360
9500 Gilman Drive #0206
La Jolla
CA
92093-0206
USA
rswalethorp@ucsd.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Cruise
Tow_ID
Haul
Station
Cycle
ISO_DateTime_UTC
ISO_DateTime_Local
Time_of_day
Lat
Long
Net_type
Mesh_size
Depth
Tow_Duration
Vol
DW_0d05_0d1_mm
DW_0d1_0d2_mm
DW_0d2_0d5_mm
DW_0d5_1_mm
DW_1_2_mm
DW_2_5_mm
DW_gt_5_mm
DW_gt_0d2_mm_TOTAL
DW_TOTAL
C_0d05_0d1_mm
C_0d1_0d2_mm
C_0d2_0d5_mm
C_0d5_1_mm
C_1_2_mm
C_2_5_mm
C_gt_5_mm
C_TOTAL
N_0d05_0d1_mm
N_0d1_0d2_mm
N_0d2_0d5_mm
N_0d5_1_mm
N_1_2_mm
N_2_5_mm
N_gt_5_mm
N_TOTAL
pcntC_0d05_0d1_mm
pcntC_0d1_0d2_mm
pcntC_0d2_0d5_mm
pcntC_0d5_1_mm
pcntC_1_2_mm
pcntC_2_5_mm
pcntC_gt_5_mm
pcntC_TOTAL
pcntN_0d05_0d1_mm
pcntN_0d1_0d2_mm
pcntN_0d2_0d5_mm
pcntN_0d5_1_mm
pcntN_1_2_mm
pcntN_2_5_mm
pcntN_gt_5_mm
pcntN_TOTAL
C_N_0d05_0d1_mm
C_N_0d1_0d2_mm
C_N_0d2_0d5_mm
C_N_0d5_1_mm
C_N_1_2_mm
C_N_2_5_mm
C_N_gt_5_mm
C_N_TOTAL
d13C_0d05_0d1_mm
d13C_0d1_0d2_mm
d13C_0d2_0d5_mm
d13C_0d5_1_mm
d13C_1_2_mm
d13C_2_5_mm
d13C_gt_5_mm
d13C_TOTAL
d15N_0d05_0d1_mm
d15N_0d1_0d2_mm
d15N_0d2_0d5_mm
d15N_0d5_1_mm
d15N_1_2_mm
d15N_2_5_mm
d15N_gt_5_mm
d15N_TOTAL
Bongo-60
General Oceanics flow meter
Folsom splitter
PDZ Europa 20-20 IRMS
PDZ Europa ANCA-GSL CHN analyzer
1-m ring net
theme
None, User defined
Cruise identfier
tow
haul_id
station
sample description
ISO_DateTime_UTC
ISO_DateTime_Local
time_of_day
latitude
longitude
net
net mesh size
depth
time_elapsed
volume
weight
biomass_C
biomass_N
Elemental carbon (C)
Nitrogen
ratio
d13C measured in biota
d15N measured in biota
featureType
BCO-DMO Standard Parameters
Bongo Net
Flow Meter
Folsom Plankton Splitter
PDZ Europa 20-20 isotope ratio mass spectrometer
PDZ Europa ANCA-GSL elemental analyzer
Ring Net
instrument
BCO-DMO Standard Instruments
RR2201
service
Deployment Activity
Eastern Indian Ocean (Argo Basin)
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Second International Indian Ocean Expedition
https://web.whoi.edu/iioe2/
Second International Indian Ocean Expedition
Description from the program website:
The Second International Indian Ocean Expedition (IIOE-2) is a major global scientific program which will engage the international scientific community in collaborative oceanographic and atmospheric research from coastal environments to the deep sea over the period 2015-2020, revealing new information on the Indian Ocean (i.e. its currents, its influence upon the climate, its marine ecosystems) which is fundamental for future sustainable development and expansion of the Indian Ocean's blue economy. A large number of scientists from research institutions from around the Indian Ocean and beyond are planning their involvement in IIOE-2 in accordance with the overarching six scientific themes of the program. Already some large collaborative research projects are under development, and it is anticipated that by the time these projects are underway, many more will be in planning or about to commence as the scope and global engagement in IIOE-2 grows.
Focused research on the Indian Ocean has a number of benefits for all nations. The Indian Ocean is complex and drives the region's climate including extreme events (e.g. cyclones, droughts, severe rains, waves and storm surges). It is the source of important socio-economic resources (e.g. fisheries, oil and gas exploration/extraction, eco-tourism, and food and energy security) and is the background and focus of many of the region's human populations around its margins. Research and observations supported through IIOE-2 will result in an improved understanding of the ocean's physical and biological oceanography, and related air-ocean climate interactions (both in the short-term and long-term). The IIOE-2's program will complement and harmonise with other regional programs underway and collectively the outcomes of IIOE-2 will be of huge benefit to individual and regional sustainable development as the information is a critical component of improved decision making in areas such as maritime services and safety, environmental management, climate monitoring and prediction, food and energy security.
IIOE-2 activities will also include a significant focus on building the capacity of all nations around the Indian Ocean to understand and apply observational data or research outputs for their own socio-economic requirements and decisions. IIOE-2 capacity building programs will therefore be focused on the translation of the science and information outputs for societal benefit and training of relevant individuals from surrounding nations in these areas.
A Steering Committee was established to support U.S. participation in IIOE-2. More information is available on their website at https://web.whoi.edu/iioe2/.
IIOE-2
largerWorkCitation
program
Collaborative Research: Mesoscale variability in nitrogen sources and food-web dynamics supporting larval southern bluefin tuna in the eastern Indian Ocean
https://osprey.bco-dmo.org/project/819488
Collaborative Research: Mesoscale variability in nitrogen sources and food-web dynamics supporting larval southern bluefin tuna in the eastern Indian Ocean
<p><em>NSF Award Abstract:</em><br />
The small area between NW Australia and Indonesia in the eastern Indian Ocean (IO) is the only known spawning ground of Southern Bluefin Tuna (SBT), a critically endangered top marine predator. Adult SBT migrate thousands of miles each year from high latitude feeding areas to lay their eggs in these tropical waters, where food concentrations on average are below levels that can support optimal feeding and growth of their larvae. Many critical aspects of this habitat are poorly known, such as the main source of nitrogen nutrient that sustains system productivity, how the planktonic food web operates to produce the unusual types of zooplankton prey that tuna larvae prefer, and how environmental differences in habitat quality associated with ocean fronts and eddies might be utilized by adult spawning tuna to give their larvae a greater chance for rapid growth and survival success. This project investigates these questions on a 38-day expedition in early 2021, during the peak time of SBT spawning. This project is a US contribution to the 2nd International Indian Ocean Expedition (IIOE-2) that advances understanding of biogeochemical and ecological dynamics in the poorly studied eastern IO. This is the first detailed study of nitrogen and carbon cycling in the region linking Pacific and IO waters. The shared dietary preferences of SBT larvae with those of other large tuna and billfish species may also make the insights gained broadly applicable to understanding larval recruitment issues for top consumers in other marine ecosystems. New information from the study will enhance international management efforts for SBT. The shared larval dietary preferences of large tuna and billfish species may also extend the insights gained broadly to many other marine top consumers, including Atlantic bluefin tuna that spawn in US waters of the Gulf of Mexico. The end-to-end study approach, highlights connections among physical environmental variability, biogeochemistry, and plankton food webs leading to charismatic and economically valuable fish production, is the theme for developing educational tools and modules through the "scientists-in-the-schools" program of the Center for Ocean-Atmospheric Prediction Studies at Florida State University, through a program for enhancing STEM learning pathways for underrepresented students in Hawaii, and through public outreach products for display at the Birch Aquarium in San Diego. The study also aims to support an immersive field experience to introduce talented high school students to marine research, with the goal of developing a sustainable marine-related educational program for underrepresented students in rural northwestern Florida.</p>
<p>Southern Bluefin Tuna (SBT) migrate long distances from high-latitude feeding grounds to spawn exclusively in a small oligotrophic area of the tropical eastern Indian Ocean (IO) that is rich in mesoscale structures, driven by complex currents and seasonally reversing monsoonal winds. To survive, SBT larvae must feed and grow rapidly under environmental conditions that challenge conventional understanding of food-web structure and functional relationships in poor open-ocean systems. The preferred prey of SBT larvae, cladocerans and Corycaeidae copepods, are poorly studied and have widely different implications for trophic transfer efficiencies to larvae. Differences in nitrogen sources - N fixation vs deep nitrate of Pacific origin - to sustain new production in the region also has implications for conditions that may select for prey types (notably cladocerans) that enhance transfer efficiency and growth rates of SBT larvae. The relative importance of these N sources for the IO ecosystem may affect SBT resiliency to projected increased ocean stratification. This research expedition investigates how mesoscale variability in new production, food-web structure and trophic fluxes affects feeding and growth conditions for SBT larvae. Sampling across mesoscale features tests hypothesized relationships linking variability in SBT larval feeding and prey preferences (gut contents), growth rates (otolith analyses) and trophic positions (TP) to the environmental conditions of waters selected by adult spawners. Trophic Positions of larvae and their prey are determined using Compound-Specific Isotope Analyses of Amino Acids (CSIA-AA). Lagrangian experiments investigate underlying process rates and relationships through measurements of water-column 14C productivity, N2 fixation, 15NO3- uptake and nitrification; community biomass and composition (flow cytometry, pigments, microscopy, in situ imaging, genetic analyses); and trophic fluxes through micro- and mesozooplankton grazing, remineralization and export. Biogeochemical and food web elements of the study are linked by CSIA-AA (N source, TP), 15N-constrained budgets and modeling. The project elements comprise an end-to-end coupled biogeochemistry-trophic study as has not been done previously for any pelagic ecosystem.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
BLOOFINZ-IO
largerWorkCitation
project
eng; USA
oceans
Eastern Indian Ocean (Argo Basin)
113.96
121.51
-17.19
-13.01
2022-01-31
2022-03-02
Eastern Indian Ocean, Indonesian Throughflow area, and the Gulf of Mexico
0
BCO-DMO catalogue of parameters from Size fractionated mesozooplankton biomass, elemental and stable isotope measurements derived from plankton net tows conducted on R/V Roger Revelle cruise RR2201 (BLOOFINZ-IO) in the Argo Basin region off NW Australia during January-March 2022
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/957050.rdf
Name: Cruise
Units: unitless
Description: <p>Cruise identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/957051.rdf
Name: Tow_ID
Units: unitless
Description: <p>Tow identifier, counts all ring net and Bongo-60 net deployments for formalin preservation, biomass and gut fluorescence measurements</p>
http://lod.bco-dmo.org/id/dataset-parameter/957052.rdf
Name: Haul
Units: unitless
Description: <p>Haul identifier, counts all ring net, Bongo-60 net an live net deployments</p>
http://lod.bco-dmo.org/id/dataset-parameter/957053.rdf
Name: Station
Units: unitless
Description: <p>Station number</p>
http://lod.bco-dmo.org/id/dataset-parameter/957054.rdf
Name: Cycle
Units: unitless
Description: <p>Cycle_day number; each cycle is a multi-day experiment following a satellite tracked drifter.</p>
http://lod.bco-dmo.org/id/dataset-parameter/957055.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Date and time (UTC) in ISO8601 format</p>
http://lod.bco-dmo.org/id/dataset-parameter/957056.rdf
Name: ISO_DateTime_Local
Units: unitless
Description: <p>Local date time net went in the water (Central Standard (GMT+8)) in ISO 8601 format</p>
http://lod.bco-dmo.org/id/dataset-parameter/957057.rdf
Name: Time_of_day
Units: unitless
Description: <p>Day or night indicator: 1 = day, 2 = night</p>
http://lod.bco-dmo.org/id/dataset-parameter/957058.rdf
Name: Lat
Units: degrees North
Description: <p>Latitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/957059.rdf
Name: Long
Units: degrees East
Description: <p>Longitude</p>
http://lod.bco-dmo.org/id/dataset-parameter/957060.rdf
Name: Net_type
Units: unitless
Description: <p>Net identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/957061.rdf
Name: Mesh_size
Units: micrometers (um)
Description: <p>Mesh size identifier</p>
http://lod.bco-dmo.org/id/dataset-parameter/957062.rdf
Name: Depth
Units: meters (m)
Description: <p>Depth</p>
http://lod.bco-dmo.org/id/dataset-parameter/957063.rdf
Name: Tow_Duration
Units: unitless
Description: <p>Tow duration in format: HH:MM</p>
http://lod.bco-dmo.org/id/dataset-parameter/957064.rdf
Name: Vol
Units: cubic meters
Description: <p>Sample volume</p>
http://lod.bco-dmo.org/id/dataset-parameter/957065.rdf
Name: DW_0d05_0d1_mm
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Dry weight of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957066.rdf
Name: DW_0d1_0d2_mm
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Dry weight of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957067.rdf
Name: DW_0d2_0d5_mm
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Dry weight of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957068.rdf
Name: DW_0d5_1_mm
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Dry weight of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957069.rdf
Name: DW_1_2_mm
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Dry weight of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957070.rdf
Name: DW_2_5_mm
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Dry weight of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957071.rdf
Name: DW_gt_5_mm
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Dry weight of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957072.rdf
Name: DW_gt_0d2_mm_TOTAL
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Total dry weight of the >0.2mm size classes</p>
http://lod.bco-dmo.org/id/dataset-parameter/957073.rdf
Name: DW_TOTAL
Units: milligrams dry weight per square meter (mg DW m-2)
Description: <p>Total dry weight</p>
http://lod.bco-dmo.org/id/dataset-parameter/957074.rdf
Name: C_0d05_0d1_mm
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Carbon biomass of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957075.rdf
Name: C_0d1_0d2_mm
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Carbon biomass of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957076.rdf
Name: C_0d2_0d5_mm
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Carbon biomass of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957077.rdf
Name: C_0d5_1_mm
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Carbon biomass of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957078.rdf
Name: C_1_2_mm
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Carbon biomass of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957079.rdf
Name: C_2_5_mm
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Carbon biomass of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957080.rdf
Name: C_gt_5_mm
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Carbon biomass of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957081.rdf
Name: C_TOTAL
Units: milligrams carbon per square meter (mg C m-2)
Description: <p>Total Carbon biomass</p>
http://lod.bco-dmo.org/id/dataset-parameter/957082.rdf
Name: N_0d05_0d1_mm
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Nitrogen biomass of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957083.rdf
Name: N_0d1_0d2_mm
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Nitrogen biomass of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957084.rdf
Name: N_0d2_0d5_mm
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Nitrogen biomass of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957085.rdf
Name: N_0d5_1_mm
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Nitrogen biomass of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957086.rdf
Name: N_1_2_mm
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Nitrogen biomass of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957087.rdf
Name: N_2_5_mm
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Nitrogen biomass of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957088.rdf
Name: N_gt_5_mm
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Nitrogen biomass of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957089.rdf
Name: N_TOTAL
Units: milligrams nitrogen per square meter (mg N m-2)
Description: <p>Total Nitrogen biomass</p>
http://lod.bco-dmo.org/id/dataset-parameter/957090.rdf
Name: pcntC_0d05_0d1_mm
Units: percentage (%)
Description: <p>Carbon percentage (%) of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957091.rdf
Name: pcntC_0d1_0d2_mm
Units: percentage (%)
Description: <p>Carbon percentage (%) of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957092.rdf
Name: pcntC_0d2_0d5_mm
Units: percentage (%)
Description: <p>Carbon percentage (%) of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957093.rdf
Name: pcntC_0d5_1_mm
Units: percentage (%)
Description: <p>Carbon percentage (%) of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957094.rdf
Name: pcntC_1_2_mm
Units: percentage (%)
Description: <p>Carbon percentage (%) of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957095.rdf
Name: pcntC_2_5_mm
Units: percentage (%)
Description: <p>Carbon percentage (%) of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957096.rdf
Name: pcntC_gt_5_mm
Units: percentage (%)
Description: <p>Carbon percentage (%) of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957097.rdf
Name: pcntC_TOTAL
Units: percentage (%)
Description: <p>Total sample percentage (%) of carbon</p>
http://lod.bco-dmo.org/id/dataset-parameter/957098.rdf
Name: pcntN_0d05_0d1_mm
Units: percentage (%)
Description: <p>Nitrogen percentage (%) of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957099.rdf
Name: pcntN_0d1_0d2_mm
Units: percentage (%)
Description: <p>Nitrogen percentage (%) of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957100.rdf
Name: pcntN_0d2_0d5_mm
Units: percentage (%)
Description: <p>Nitrogen percentage (%) of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957101.rdf
Name: pcntN_0d5_1_mm
Units: percentage (%)
Description: <p>Nitrogen percentage (%) of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957102.rdf
Name: pcntN_1_2_mm
Units: percentage (%)
Description: <p>Nitrogen percentage (%) of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957103.rdf
Name: pcntN_2_5_mm
Units: percentage (%)
Description: <p>Nitrogen percentage (%) of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957104.rdf
Name: pcntN_gt_5_mm
Units: percentage (%)
Description: <p>Nitrogen percentage (%) of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957105.rdf
Name: pcntN_TOTAL
Units: percentage (%)
Description: <p>Total sample percentage (%) of nitrogen</p>
http://lod.bco-dmo.org/id/dataset-parameter/957106.rdf
Name: C_N_0d05_0d1_mm
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>C:N ratio of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957107.rdf
Name: C_N_0d1_0d2_mm
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>C:N ratio of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957108.rdf
Name: C_N_0d2_0d5_mm
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>C:N ratio of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957109.rdf
Name: C_N_0d5_1_mm
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>C:N ratio of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957110.rdf
Name: C_N_1_2_mm
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>C:N ratio of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957111.rdf
Name: C_N_2_5_mm
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>C:N ratio of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957112.rdf
Name: C_N_gt_5_mm
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>C:N ratio of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957113.rdf
Name: C_N_TOTAL
Units: milligrams carbon per milligram nitrogen (mg C (mg N)-1)
Description: <p>Total C:N ratio</p>
http://lod.bco-dmo.org/id/dataset-parameter/957114.rdf
Name: d13C_0d05_0d1_mm
Units: delta 13C (‰)
Description: <p>Bulk 13C isotopic value (d13C) of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957115.rdf
Name: d13C_0d1_0d2_mm
Units: delta 13C (‰)
Description: <p>Bulk 13C isotopic value (d13C) of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957116.rdf
Name: d13C_0d2_0d5_mm
Units: delta 13C (‰)
Description: <p>Bulk 13C isotopic value (d13C) of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957117.rdf
Name: d13C_0d5_1_mm
Units: delta 13C (‰)
Description: <p>Bulk 13C isotopic value (d13C) of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957118.rdf
Name: d13C_1_2_mm
Units: delta 13C (‰)
Description: <p>Bulk 13C isotopic value (d13C) of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957119.rdf
Name: d13C_2_5_mm
Units: delta 13C (‰)
Description: <p>Bulk 13C isotopic value (d13C) ratio of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957120.rdf
Name: d13C_gt_5_mm
Units: delta 13C (‰)
Description: <p>Bulk 13C isotopic value (d13C) ratio of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957121.rdf
Name: d13C_TOTAL
Units: delta 13C (‰)
Description: <p>Total sample bulk 13C isotopic value (d13C)</p>
http://lod.bco-dmo.org/id/dataset-parameter/957122.rdf
Name: d15N_0d05_0d1_mm
Units: delta 15N (‰)
Description: <p>Bulk 15N isotopic value (d15N) of the 0.05-0.1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957123.rdf
Name: d15N_0d1_0d2_mm
Units: delta 15N (‰)
Description: <p>Bulk 15N isotopic value (d15N) of the 0.1-0.2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957124.rdf
Name: d15N_0d2_0d5_mm
Units: delta 15N (‰)
Description: <p>Bulk 15N isotopic value (d15N) of the 0.2-0.5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957125.rdf
Name: d15N_0d5_1_mm
Units: delta 15N (‰)
Description: <p>Bulk 15N isotopic value (d15N) of the 0.5-1mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957126.rdf
Name: d15N_1_2_mm
Units: delta 15N (‰)
Description: <p>Bulk 15N isotopic value (d15N) of the 1-2mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957127.rdf
Name: d15N_2_5_mm
Units: delta 15N (‰)
Description: <p>Bulk 15N isotopic value (d15N) ratio of the 2-5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957128.rdf
Name: d15N_gt_5_mm
Units: delta 15N (‰)
Description: <p>Bulk 15N isotopic value (d15N) ratio of the >5mm size class</p>
http://lod.bco-dmo.org/id/dataset-parameter/957129.rdf
Name: d15N_TOTAL
Units: delta 15N (‰)
Description: <p>Total sample bulk 15N isotopic value (d15N)</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
54547
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/272c0f4a-891c-4186-a616-c8a33cbc6126/content
download
https://doi.org/10.26008/1912/bco-dmo.956590.1
download
onLine
dataset
<p>This dataset is derived from mesozooplankton net tows in the Indian Ocean Argo Basin off Northwestern Australia carried out from the R/V Roger Revelle cruise in January to March 2022, which were part of an NSF-OCE project (aka: BLOOFINZ-IO) led by Prof. Michael R. Landry to investigate the epipelagic marine nitrogen cycle, plankton dynamics, and impacts on growth and survival of larval Southern Bluefin Tuna (SBT). The cruise report can be found at <a href="http://hdl.handle.net/1834/43464" target="_blank">http://hdl.handle.net/1834/43464</a>. These data are meant to be used in inter-species, interregional comparisons to data from the BLOOFIN-GoM study of larval Atlantic Bluefin Tuna (ABT) in the Gulf of Mexico spawning region.</p>
<p>Oblique net tows were taken to obtain estimates of mesozooplankton standing stocks and grazing over the depth range of the upper mixed layer and the full euphotic zone. Generally, we sampled during midday (1000-1200 h) and midnight (2100-0300 h) hours repeatedly over 3-4 days following a drogued drifter (termed "Cycles"), allowing estimates of diel vertical migrant biomass by difference within the same water parcel. Additional transect stations were also sampled at variable times of the day. We used a 1-meter (m) diameter ring net with a 202-micrometer (µm) mesh size to sample the full euphotic zone, and a 60-centimeter (cm) diameter Bongo (aka: Bongo-60) net with one net having a 202-µm mesh size and the other a 50-µm mesh size to sample the upper mixed layer. All nets were Nitex mesh and fitted with General Oceanics flow meters in the center of the opening to measure volume filtered. Depth of tow was controlled by a depth sensor on the hydrowire and exact depths recorded by a depth logger fitted to the net frames. Net tow contents from the Ring net and Bongo-60 202-µm mesh sized nets were anesthetized with ice-cold carbonated water and split with a Folsom splitter, with half preserved in 4% buffered formalin and half further split into two quarters. Each quarter was size-fractionated using nested sieves into five size classes: 0.2-0.5, 0.5-1, 1-2, 2-5, and &gt;5 millimeters (mm). In the quarter dedicated for measuring biomass, each size fraction was concentrated on a preweighed 202-µm Nitex filter, rinsed with isotonic ammonium formate to remove sea salt, dried at 60 degrees Celsius (°C), and stored dry in sealed containers with desiccant. The other quarter was dedicated to measuring gut pigments for estimating mesozooplankton grazing. Net content from the Bongo-60 50-µm mesh sized net was treated similarly except that half was preserved in formalin, and half split into 0.05-0.1, 0.1-0.2, and &gt;0.2 mm size fractions using nested sieves and dried for measuring biomass.</p>
<p>In the laboratory, dry filters were weighed on an analytical balance and filter preweights subtracted to calculate zooplankton dry weight for each size fraction. Zooplankton dry weight in milligrams per square meter (mg m-2) was calculated from the measured volume, depth of tow, and fraction of sample analyzed. The dried sample was subsequently scraped off the filter, ground to a powder with a mortar and pestle, and subsampled by weight for carbon (C), nitrogen (N), and stable isotope (13C and 15N) analyses.</p>
<p>CN subsamples were weighed in small tin boats, packed into pellets, and analyzed by a standard elemental analyzer, isotope ratio mass spectrometry (EA-IRMS) at the Stable Isotope Facility at University of California, Davis (<a href="https://stableisotopefacility.ucdavis.edu/" target="_blank">https://stableisotopefacility.ucdavis.edu/</a>). The system consists of a PDZ Europa ANCA-GSL elemental analyzer interfaced to a PDZ Europa 20-20 isotope ratio mass spectrometer (Sercon Ltd., Cheshire, UK). Acetanilide, USGS41, and facility internal standards was used for instrument stability and corrections for both elemental and isotopic measurements on every run. C and N biomass estimates (mg m-2) were computed for each size fraction from C:DW and N:DW ratios. Stable isotope values are reported in standard delta (‰) notation relative to atmospheric N2 and Vienna Pee Dee Belemnite for carbon.</p>
Specified by the Principal Investigator(s)
<p>Data processing was carried out in Microsoft Excel and Access.</p>
<p>Sample % carbon (C), % nitrogen (N), C:N ratio, delta 13C and 15N were only measured in two night and two day net tows on Cycles, and not on any transect stations. For this reason, biomass in C and N per square meter is only calculated for Cycles. For each Cycle, averages in % C and % N were calculated for each net type, in each size fraction, and for day and night, respectively (n=2). These averages were then applied to estimate C and N per square meter from all Cycle net tows.</p>
Specified by the Principal Investigator(s)
- Imported original file "BCO_DOM_BLOOFINZ-IO_mesozooplankton_size_fractionated_biomass_data.xlsx" into the BCO-DMO system.
- Marked "nd" as a missing data value (missing data are empty/blank in the final CSV file).
- Renamed fields to comply with BCO-DMO naming conventions.
- Converted date-time fields to ISO 8601 format.
- Rounded "Depth" column to 1 decimal place and all other numeric columns to 4 deicmal places.
- Saved final file as "956590_v1_bloofinz-io_mesozooplankton_biomass_and_isotopes.csv".
Specified by BCO-DMO Data Managers
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Bongo-60
Bongo-60
PI Supplied Instrument Name: Bongo-60 PI Supplied Instrument Description:We used a 60-cm diameter Bongo net with 202-µm and 50-µm Nitex mesh nets. Instrument Name: Bongo Net Instrument Short Name:Bongo Net Instrument 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 Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/NETT0009/
General Oceanics flow meter
General Oceanics flow meter
PI Supplied Instrument Name: General Oceanics flow meter PI Supplied Instrument Description:We used a 1-m diameter ring net with a 202-µm Nitex mesh and a 60 cm diameter Bongo net one side with a 202-µm mesh and the other a 50-µm mesh. General Oceanics flow meters were fitted in the center of the opening of each of the three nets to measure volume filtered. Instrument Name: Flow Meter Instrument Short Name:Flow Meter Instrument Description: General term for a sensor that quantifies the rate at which fluids (e.g. water or air) pass through sensor packages, instruments, or sampling devices. A flow meter may be mechanical, optical, electromagnetic, etc. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/388/
Folsom splitter
Folsom splitter
PI Supplied Instrument Name: Folsom splitter PI Supplied Instrument Description:Net tow contents were anesthetized with ice-cold carbonated water and split with a Folsom splitter. Instrument Name: Folsom Plankton Splitter Instrument Short Name:Folsom Splitter Instrument Description: A device for sub-sampling of plankton and ichthyoplankton samples by splitting, developed by Dr. Folsom of the Scripps Institute of Oceanography. Ideally suited for splitting plankton samples with minimal debris. A measured volume of plankton sample is placed in the undivided section of the drum. This is rotated 120 degrees to divide the stirred sample with a separating blade. Standard Methods suggests splitting until a subsample of 200-500 individuals is obtained.
PDZ Europa 20-20 IRMS
PDZ Europa 20-20 IRMS
PI Supplied Instrument Name: PDZ Europa 20-20 IRMS PI Supplied Instrument Description:The continuous flow system consisted of a PDZ Europa ANCA-GSL elemental analyzer coupled to a PDZ Europa 20-20 isotope ratio mass spectrometer. Instrument Name: PDZ Europa 20-20 isotope ratio mass spectrometer Instrument Short Name:Europa 20-20 IRMS Instrument Description: The PDZ Europa 20-20 is a dedicated continuous flow isotope ratio mass spectrometer for hyphenated stable isotope analyses able to measure 15N, 13C, 18O, and 34S in a host of applications. The analyzer has been purposely designed to measure 2H by continuous flow methodology and is also suitable to analyze the light stable isotopes in all the commonly measured gases: H2, N2, NO, N2O, O2, CO, CO2, SO, and SO2.
PDZ Europa ANCA-GSL CHN analyzer
PDZ Europa ANCA-GSL CHN analyzer
PI Supplied Instrument Name: PDZ Europa ANCA-GSL CHN analyzer PI Supplied Instrument Description:The continuous flow system consisted of a PDZ Europa ANCA-GSL elemental analyzer coupled to a PDZ Europa 20-20 isotope ratio mass spectrometer. Instrument Name: PDZ Europa ANCA-GSL elemental analyzer Instrument Short Name: Instrument Description: The ANCA-GSL module allows samples such as soil, viscous liquids, plant material, and organic compounds, to be analyzed directly by using Dumas combustion for 15N, 13C, and 34S or pyrolysis for 18O and D. It also allows isotope analysis of abundant gases from septum sealed containers. During combustion mode, a capsule containing the sample falls into the combustion tube and is converted in the presence of oxygen to CO2, N2, NOx, and H2O. An elemental copper stage reduces NOx, a MgClO4 trap removes water vapor, a switchable Carbosorb trap can be used to remove CO2 (for 15N only analyses) and a GC column separates CO2 from N2 (allowing dual isotope analysis). Modified packings, a Nafion dryer and different GC column allow 34S analysis. The sample preparation unit consists of a 66-place autosampler for unattended operation (larger options are available), 2 furnaces able to operate to 1100 deg C, and an on-board microprocessor. The analyzer is capable of dual isotope analysis of 15N and 13C. For CO (18O), H2 (2H), N2 (15N), CO2 (13C), CO2 (18O), and SO2 (34S) with precisions between 0.1 and 3 dependent on the element.
1-m ring net
1-m ring net
PI Supplied Instrument Name: 1-m ring net PI Supplied Instrument Description:We used a 1-m diameter ring net with 202-µm Nitex mesh. Instrument Name: Ring Net Instrument Short Name:Ring Net Instrument 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). Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/22/
Cruise: RR2201
RR2201
R/V Roger Revelle
Community Standard Description
International Council for the Exploration of the Sea
R/V Roger Revelle
vessel
RR2201
Michael R. Landry
University of California-San Diego Scripps
http://hdl.handle.net/1834/43464
Report describing RR2201
R/V Roger Revelle
Community Standard Description
International Council for the Exploration of the Sea
R/V Roger Revelle
vessel