http://lod.bco-dmo.org/id/dataset/930172 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 2024-06-21 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Fish larvae abundances across the Eastern Tropical North Pacific Oxygen Minimum Zone determined from MOCNESS sampling conducted on R/V Sally Ride cruise SR2114 from December 2021 to January 2022 2024-09-25 publication 2024-09-25 revision BCO-DMO Linked Data URI 2024-09-25 creation http://lod.bco-dmo.org/id/dataset/930172 Juan Gerardo Gutiérrez-Bravo University of Massachusetts Dartmouth SMAST 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: Gutiérrez-Bravo, J. G. (2024) Fish larvae abundances across the Eastern Tropical North Pacific Oxygen Minimum Zone determined from MOCNESS sampling conducted on R/V Sally Ride cruise SR2114 from December 2021 to January 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-09-25 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/930172 [access date] SR2114 Fish larvae abundances by development stages Dataset Description: Methods and Sampling: &lt;p&gt;Data were collected on R/V Sally Ride cruise SR2114 in the Eastern Tropical North Pacific from December 2021 to January 2022.&lt;/p&gt; &lt;p&gt;The MOCNESS was equipped with 10 nets of 1 square meter (m^2) mouth opening and 333 micrometer (µm) mesh size, a SeaBird SBE9+ CTD, a SeaBird SBE 43 dissolved oxygen (DO) sensor, and flow meter and angle sensors. The MOCNESS tows were performed at 1.5-2 knots net speed and at a 40-50° net angle. A horizontal net tow strategy was followed to sample selected DO concentrations (oxypleths) in five sampling levels: 1) the oxic level (~200 micromoles per kilogram (μmol/kg), near surface), 2) the hypoxic (~100 μmol/kg) and 3) suboxic (~10 μmol/kg) levels in the upper core boundary, 4) the anoxic core level (&amp;lt;1 μmol/kg, at the center of the anoxic core), and 5) the deep level (~10 μmol/kg in the lower boundary below the anoxic core). The remaining 5 MONCESS nets were opened during transitions between target depths and were not used for this study. This horizontal sampling protocol allows for discrete, punctual sampling events, but cannot provide continuous, vertically-integrated abundances as oblique tows would (Wiebe et al. 2015).&lt;/p&gt; &lt;p&gt;Fish larvae and juveniles were separated and counted under a stereoscope using metal tweezers. Fish larvae were identified to the most specific taxonomic level possible using a specialized bibliography. The larval stages (preflexion, flexion, postflexion, and transformation) were defined according to Moser (1996). Preflexion and flexion larvae were considered &quot;early larval stages&quot;&amp;nbsp;as they both lack fully-developed fins. Larval abundances were standardized to larvae per 1000&amp;nbsp;cubic meters and were considered absolute abundances. Juveniles and adults were separated, counted, and identified to family level, except for the &lt;em&gt;Gonostomatidae&lt;/em&gt;, that were represented entirely by the genus &lt;em&gt;Cyclothone&lt;/em&gt;. Adult abundances were standardized to fish per 1000 cubic meters. Because the increased swimming ability of adult fish could affect fishing efficiency, abundances were considered relative, and should not be compared with the absolute abundances of fish larvae.&lt;/p&gt; Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1851361 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1851361 onGoing Juan Gerardo Gutiérrez-Bravo University of Massachusetts Dartmouth SMAST jgutierrezbravo@umassd.edu pointOfContact asNeeded Dataset Version: 1 Unknown MOCNESS, SeaBird SBE9+ CTD flow meter metal tweezers stereoscopic microscope SeaBird SBE 43 DO sensor theme None, User defined CTD MOCNESS Flow Meter Manual Biota Sampler Microscope - Optical Sea-Bird SBE 43 Dissolved Oxygen Sensor instrument BCO-DMO Standard Instruments SR2114 service Deployment Activity Eastern Tropical Pacific from Costa Rica to San Diego, CA, USA 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. Collaborative Research: Multiyear autonomous measurement of N-loss in the ETNP ODZ https://osprey.bco-dmo.org/project/925430 Collaborative Research: Multiyear autonomous measurement of N-loss in the ETNP ODZ <p><em>NSF Award Abstract:</em><br /> Several regions of the deep ocean naturally contain almost no oxygen. Because of this lack of oxygen, microbes living in these regions live in ways that differ from those in oxygenated waters consuming nitrate ions instead of oxygen for respiration. Use of nitrate for microbial respiration results in the production of nitrogen gas which is called denitrification. The resulting removal of nitrate has consequences for the whole ocean as nitrogen is an important nutrient controlling plant growth; however, whereas plants can use nitrogen in the form of nitrate, they cannot, with a few exceptions, use nitrogen gas. There remains a number of uncertainties regarding how much denitrification occurs in the ocean, what controls it, and how it varies in time and space. Traditional studies of ocean denitrification have been limited by the time ships can be at sea and the relatively small proportion of the ocean they can observe. Our project plans to remedy this problem by using vehicles called floats that can operate autonomously in the ocean for three years or more as they drift with currents over hundreds of kilometers. We will outfit ten floats with sensors to measure oxygen and nitrogen gas which will be placed throughout the oxygen-depleted region of the Pacific Ocean to the west of Mexico. This is the largest such region in the ocean from which we have two years of results from a prototype float which validated our approach. This study may well transform our understanding of ocean denitrification and ultimately benefit society as a whole through greater confidence in predictions of the ocean's nitrogen cycle and capacity to fix carbon dioxide under current and future conditions. Application and further development of float systems using commercially available technology will directly benefit successor studies, and more broadly showcase the use of water-following platforms to tackle difficult oceanographic problems. Advances from this study are expected to carry over to other disciplines including ocean biogeochemical modeling. Outreach activities, support for an early career scientist, and student training are included in the project. For the outreach activities, the investigators plan to tie into well-established after-school programs serving underrepresented populations in Massachusetts and established opportunities for public presentations using float related display materials at the University of Washington.</p> <p>Oxygen deficient zones (ODZs), despite constituting a small fraction of total oceanic volume, play important roles in regulating global ocean carbon and nitrogen cycles including hosting 30 to 50% of the global loss of fixed nitrogen. Unfortunately, current uncertainty in ODZ nitrogen loss derives from substantial temporal and spatial variability in rates that remain under-sampled by ship-based measurements. While local regulation of nitrogen loss by oxygen and organic matter availability are well accepted, temporal/spatial variability in the nitrogen flux is likely a result of the influence of physical forcings such as remote ventilation, seasonal variability, and mesoscale eddies. Understanding how the impact of physical forcings on nitrogen loss as mediated through oxygen and organic flux will be required to fully understand the causes and consequences of any future ODZ expansion. To improve our understanding of ODZ nitrogen loss, we will carry out a multiyear, autonomous float-based observational program to address outstanding questions regarding bioavailable nitrogen loss in ODZs. As the largest ODZ and region of our pilot deployments, our operation area will be the Eastern Tropical N. Pacific (ETNP) where our study will determine over a multi-year period, in-situ nM-level oxygen and biogenic nitrogen on float profiles spanning geographic gradients in oxygen and surface productivity. For the first time, our study will also determine in situ nitrogen loss rates from changes in nitrogen concentration during 1 to 2 week Lagrangian float drifts along a constant density surface. A pilot 2 yr float deployment in the ETNP documents our ability to do so. Critically, our float-based approach more closely matches the frequency and distribution of observations to the expected variability in biogenic nitrogen production as compared to prior work and will dramatically increase the data density for this region by acquiring &gt;500 profiles/drifts for nitrogen and &gt;1000 profiles for nM oxygen.</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> N-loss in the ETNP ODZ largerWorkCitation project eng; USA oceans Eastern Tropical Pacific from Costa Rica to San Diego, CA, USA -102.43 -93.98 8.587 11.14 2021-12-26 2022-01-17 0 BCO-DMO catalogue of parameters from Fish larvae abundances across the Eastern Tropical North Pacific Oxygen Minimum Zone determined from MOCNESS sampling conducted on R/V Sally Ride cruise SR2114 from December 2021 to January 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 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 https://osprey.bco-dmo.org/dataset/930172/data/download download onLine dataset &lt;p&gt;Data were collected on R/V Sally Ride cruise SR2114 in the Eastern Tropical North Pacific from December 2021 to January 2022.&lt;/p&gt; &lt;p&gt;The MOCNESS was equipped with 10 nets of 1 square meter (m^2) mouth opening and 333 micrometer (µm) mesh size, a SeaBird SBE9+ CTD, a SeaBird SBE 43 dissolved oxygen (DO) sensor, and flow meter and angle sensors. The MOCNESS tows were performed at 1.5-2 knots net speed and at a 40-50° net angle. A horizontal net tow strategy was followed to sample selected DO concentrations (oxypleths) in five sampling levels: 1) the oxic level (~200 micromoles per kilogram (μmol/kg), near surface), 2) the hypoxic (~100 μmol/kg) and 3) suboxic (~10 μmol/kg) levels in the upper core boundary, 4) the anoxic core level (&amp;lt;1 μmol/kg, at the center of the anoxic core), and 5) the deep level (~10 μmol/kg in the lower boundary below the anoxic core). The remaining 5 MONCESS nets were opened during transitions between target depths and were not used for this study. This horizontal sampling protocol allows for discrete, punctual sampling events, but cannot provide continuous, vertically-integrated abundances as oblique tows would (Wiebe et al. 2015).&lt;/p&gt; &lt;p&gt;Fish larvae and juveniles were separated and counted under a stereoscope using metal tweezers. Fish larvae were identified to the most specific taxonomic level possible using a specialized bibliography. The larval stages (preflexion, flexion, postflexion, and transformation) were defined according to Moser (1996). Preflexion and flexion larvae were considered &quot;early larval stages&quot;&amp;nbsp;as they both lack fully-developed fins. Larval abundances were standardized to larvae per 1000&amp;nbsp;cubic meters and were considered absolute abundances. Juveniles and adults were separated, counted, and identified to family level, except for the &lt;em&gt;Gonostomatidae&lt;/em&gt;, that were represented entirely by the genus &lt;em&gt;Cyclothone&lt;/em&gt;. Adult abundances were standardized to fish per 1000 cubic meters. Because the increased swimming ability of adult fish could affect fishing efficiency, abundances were considered relative, and should not be compared with the absolute abundances of fish larvae.&lt;/p&gt; Specified by the Principal Investigator(s) &lt;p&gt;Using manufacturer software (SBE Data Processing), CTD data were filtered and aligned. CTD-rosette data were binned to 1 meter depth and MOCNESS data were binned to 10 seconds. Conservative Temperature and Absolute Salinity were calculated. CTD-rosette data were used to construct hydrographic sections, while MOCNESS sensor data was used to describe the environmental conditions of zooplankton samples.&lt;/p&gt; &lt;p&gt;Zooplankton biovolume was measured by the displacement method (Steedman 1976) and standardized to milliliters per 1000 cubic meters (mL/1000 m^3) by dividing the zooplankton displacement volume (mL) by the volume of water filtered by the net (m^3).&lt;/p&gt; &lt;p&gt;Larval abundances were standardized to larvae per 1000 cubic meters (larvae/1000 m^3) and were considered absolute abundances.&lt;/p&gt; &lt;p&gt;Adult abundances were standardized to fish per 1000 cubic meters (fish/1000 m^3). Because the increased swimming ability of adult fish could affect fishing efficiency, abundances were considered relative, and should not be compared with the absolute abundances of fish larvae.&lt;/p&gt; Specified by the Principal Investigator(s) - Imported original file &quot;SR2114_FishLarvae__dev stages.xlsx&quot; into the BCO-DMO system. - Loaded sheets containing the standard data (sheet numbers 2,4,7,9,11,13) (named with &quot;std&quot;; omitted the combined pre+flex sheet as instructed by the data submitter). - Concatenated all sheets into one dataset. - Renamed fields to comply with BCO-DMO naming conventions. - Converted Date column to YYYY-MM-DD format. - Replaced the following in the Gpo_Dom column to remove special characters: -- Copépodos with Copepods -- Anfípodos with Amphipods -- Eufáusidos with Euphausiids -Renamed the following species names that contained typos, identified using WoRMS taxa match tool: -- Acanthocybium solandrii changed to Acanthocybium solandri -- Ceratoscopelus townsendii changed to Ceratoscopelus townsendi -- Citarichthys platophrys changed to Citharichthys platophrys -- Evermanella ahlstromi changed to Evermannella ahlstromi -- Lampadaena urophaos changed to Lampadena urophaos -- Lepidocybium flavobrunnei changed to Lepidocybium flavobrunneum -- Muraenida sp2 changed to Muraenidae sp2 -- Ophichthus cf zophochyr changed to Ophichthus cf zophochir -- Unnamed column &quot;zzz&quot; changed to Myctophidae -- Ophichthus sp1 (zophochir?) changed to to Ophichthus cf zophochir -- Scopelogados buspinnosus changed to Scopelogadus bispinosus -- Scopelogadus buspinosus changed to Scopelogadus bispinosus - Saved the final file as &quot;930172_v1_s2r114_fish_larvae_abundances.csv&quot;. 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 MOCNESS, SeaBird SBE9+ CTD MOCNESS, SeaBird SBE9+ CTD PI Supplied Instrument Name: MOCNESS, SeaBird SBE9+ CTD PI Supplied Instrument Description:The MOCNESS was equipped with 10 nets of 1 m^2 mouth opening and 333 µm mesh size, a SeaBird SBE9+ CTD, a SeaBird SBE 43 DO sensor, and flow meter and angle sensors. Instrument Name: CTD MOCNESS Instrument Short Name:CTD MOCNESS Instrument Description: The CTD part of the MOCNESS includes 1) a pressure (depth) sensor which is a thermally isolated titanium strain gauge with a standard range of 0-5000 decibars full scale, 2) A Sea Bird temperature sensor whose frequency output is measured and sent to the surface for logging and conversion to temperature by the software in the MOCNESS computer (The system allows better than 1 milli-degree resolution at 10 Hz sampling rate), and 3) A Sea Bird conductivity sensor whose output frequency is measured and sent to the surface for logging and conversion to conductivity by the software in the computer (The system allows better than 1 micro mho/cm at 10 Hz sampling rate). The data rate depends on the speed of the computer and the quality of the cable. With a good cable, the system can operate at 2400 baud, sampling all variables at 2 times per second. One sample every 4 seconds is the default, although the hardware can operate much faster. (From The MOCNESS Manual) Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/131/ flow meter flow meter PI Supplied Instrument Name: flow meter 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/ metal tweezers metal tweezers PI Supplied Instrument Name: metal tweezers Instrument Name: Manual Biota Sampler Instrument Short Name:Manual Biota Sampler Instrument Description: "Manual Biota Sampler" indicates that a sample was collected in situ by a person, possibly using a hand-held collection device such as a jar, a net, or their hands. This term could also refer to a simple tool like a hammer, saw, or other hand-held tool. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/90/ stereoscopic microscope stereoscopic microscope PI Supplied Instrument Name: stereoscopic microscope Instrument Name: Microscope - Optical Instrument Short Name: Instrument 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". Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB05/ SeaBird SBE 43 DO sensor SeaBird SBE 43 DO sensor PI Supplied Instrument Name: SeaBird SBE 43 DO sensor Instrument Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor Instrument Short Name:SBE-43 DO Instrument Description: The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics Community Standard Description: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/ Cruise: SR2114 SR2114 R/V Sally Ride Community Standard Description International Council for the Exploration of the Sea R/V Sally Ride vessel SR2114 Mark A. Altabet University of Massachusetts Dartmouth R/V Sally Ride Community Standard Description International Council for the Exploration of the Sea R/V Sally Ride vessel