| Contributors | Affiliation | Role |
|---|---|---|
| Brodeur, Richard D | National Oceanic and Atmospheric Administration (NOAA) | Co-Principal Investigator |
| Pool, Suzan S | Oregon State University (OSU-CIMRS) | Co-Principal Investigator |
| Allison, Dicky | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
U.S. GLOBEC Northeast Pacific California Current System Mesoscale Process Studies
Neuston Data
Contacts for this data set are:
Dr. Richard Brodeur
Northwest Fisheries Science Center
National Oceanographic and Atmospheric Administration
Newport, OR 97365
Phone: 541-867-0336
Email: rick.brodeur@noaa.gov
Suzan Pool
Cooperative Institute of Marine Resources
Oregon State University
Newport, OR 97365
Phone: 541-867-0195
Email: suzan.pool@noaa.gov
During juvenile salmonid trawling cruises, additional sampling included CTD profiles, neuston net tows, and chlorophyll a water samples. At most stations, data on all parameters were collected.
Results:
Detailed analyses of the neuston community are presented in Reese et al. (2005) and Pool and Brodeur (2005).
References:
Brodeur, 1991
Pool and Brodeur, 2005
Reese et al., 2005
Schabetsberger et al., 2003
Last modified: February 24, 2004
A neuston net with a 1-m wide by 0.3-m high mouth and 0.333-mm mesh was utilized for collection of all zooplankton samples. A General Oceanics flowmeter was attached in the mouth of the net in order to estimate the volume of water filtered during each tow. The net was towed out of the ship's wake for five minutes at approximately two knots (3.7 km/h). Upon retrieval, the net was hosed down and contents of the cod end were transferred to a sample jar. Large jellyfish and flotsam were rinsed off with seawater to remove any attached plankton and discarded at sea. The sample was preserved with formalin in ambient seawater to make a 5% formalin solution.
In the laboratory, the samples were washed over a 0.320-mm mesh sieve with tap water to remove formalin, then transferred to water. Additional extraneous contents were subsequently removed. To obtain displacement volumes, samples were allowed to settle overnight in Imhoff settling cones or graduated cylinders depending on the sample volume. Biovolumes (ml per 100 m3) were calculated from displacement volumes and flowmeter readings.
Sample was transferred to a clear Pyrex dish on a white background for sorting and removing zooplankton .5 mm using a lighted magnifying glass. This size fraction was chosen based on prey size selected by juvenile coho and Chinook salmon in previous trophic analyses (Brodeur, 1991; Schabetsberger et al., 2003). Occasionally, large samples with many macrozooplankton were subsampled with a Folsom plankton splitter and the counts estimated. The macrozooplankton were enumerated and identified to the lowest practical taxon using a dissecting microscope. Life stages of the specimens were determined when possible. Completed samples were transferred to 70% ethanol. Counts were standardized into concentrations expressed as numbers per 100 m3.
| File |
|---|
neuston.csv (Comma Separated Values (.csv), 227.64 KB) MD5:691d0863294f324039cf01d99461acdb Primary data file for dataset ID 2464 |
| Parameter | Description | Units |
| year | Year. | unitless |
| cruise_id | Cruise identifier. | unitless |
| cast | Cast number within the cruise. | unitless |
| station_std | Standard station name. | unitless |
| lat | latitude (decimal degrees) | decimal degrees |
| lon | longitude (decimal degrees) | decimal degrees |
| depth_w | Bottom depth of station (meters) | meters |
| month_local | local month | unitless |
| day_local | local day | unitless |
| time_local | local time (24-hr) | unitless |
| inst | Sampling instrument. | unitless |
| gear_area_m2 | Mouth area of gear (m2) | m<sup>2</sup> |
| gear_mesh | Gear mesh size (mm). | mm |
| min_sample_depth | minimum sampling depth | not supllied |
| max_sample_depth | maximum sampling depth | not supplied |
| biovolume_ml_100m3 | Settled biovolume (ml 100 m-3). | ml 100 m<sup>-3</sup> |
| genus_species | Taxonomic category. | unitless |
| life_stage | Life stage. | unitless |
| abund_100m3 | abundance per 100 m3 | count per 100 m^3 |
| comments | comments about particular record | unitless |
| ship | Name of the ship. | unitless |
| Dataset-specific Instrument Name | Neuston |
| Generic Instrument Name | Neuston Net |
| Dataset-specific Description | A neuston net with a 1-m wide by 0.3-m high mouth and 0.333-mm mesh wasutilized for collection of all zooplankton samples. |
| Generic Instrument Description | Neuston Nets are nets that collect zooplankton that live in the top few centimeters of the sea surface (the neuston layer). This specialized net has a rectangular mouth opening usually 2 or 3 times as wide as deep, i.e. 1 meter by 1/2 meter or 60 cm by 20 cm, with sometimes hollow piping construction to aid in flotation. They are generally towed half submerged at 1-2 kts from the side of the vessel on a boom to avoid the ship's wake. |
| Website | |
| Platform | F/V Sea Eagle |
| Report | |
| Start Date | 2000-05-29 |
| End Date | 2000-06-11 |
| Description | Methods & Sampling A neuston net with a 1-m wide by 0.3-m high mouth and 0.333-mm mesh was utilized for collection of all zooplankton samples. A General Oceanics flowmeter was attached in the mouth of the net in order to estimate the volume of water filtered during each tow. The net was towed out of the ship's wake for five minutes at approximately two knots (3.7 km/h). Upon retrieval, the net was hosed down and contents of the cod end were transferred to a sample jar. Large jellyfish and flotsam were rinsed off with seawater to remove any attached plankton and discarded at sea. The sample was preserved with formalin in ambient seawater to make a 5% formalin solution. Processing Description In the laboratory, the samples were washed over a 0.320-mm mesh sieve with tap water to remove formalin, then transferred to water. Additional extraneous contents were subsequently removed. To obtain displacement volumes, samples were allowed to settle overnight in Imhoff settling cones or graduated cylinders depending on the sample volume. Biovolumes (ml per 100 m3) were calculated from displacement volumes and flowmeter readings. Sample was transferred to a clear Pyrex dish on a white background for sorting and removing zooplankton .5 mm using a lighted magnifying glass. This size fraction was chosen based on prey size selected by juvenile coho and Chinook salmon in previous trophic analyses (Brodeur, 1991; Schabetsberger et al., 2003). |
| Website | |
| Platform | F/V Sea Eagle |
| Report | |
| Start Date | 2000-07-28 |
| End Date | 2000-08-12 |
| Description | Methods & Sampling A neuston net with a 1-m wide by 0.3-m high mouth and 0.333-mm mesh was utilized for collection of all zooplankton samples. A General Oceanics flowmeter was attached in the mouth of the net in order to estimate the volume of water filtered during each tow. The net was towed out of the ship's wake for five minutes at approximately two knots (3.7 km/h). Upon retrieval, the net was hosed down and contents of the cod end were transferred to a sample jar. Large jellyfish and flotsam were rinsed off with seawater to remove any attached plankton and discarded at sea. The sample was preserved with formalin in ambient seawater to make a 5% formalin solution. Processing Description In the laboratory, the samples were washed over a 0.320-mm mesh sieve with tap water to remove formalin, then transferred to water. Additional extraneous contents were subsequently removed. To obtain displacement volumes, samples were allowed to settle overnight in Imhoff settling cones or graduated cylinders depending on the sample volume. Biovolumes (ml per 100 m3) were calculated from displacement volumes and flowmeter readings. Sample was transferred to a clear Pyrex dish on a white background for sorting and removing zooplankton .5 mm using a lighted magnifying glass. This size fraction was chosen based on prey size selected by juvenile coho and Chinook salmon in previous trophic analyses (Brodeur, 1991; Schabetsberger et al., 2003). |
| Website | |
| Platform | F/V Frosti |
| Report | |
| Start Date | 2002-05-31 |
| End Date | 2002-06-08 |
| Description | Event logs provide an overall summary of the sampling activities during a cruise. A hard copy of the event log is also included in the cruise report. Further documentation about event logs is available in Chief Scientist Data Reporting Requirements. For further information contact the Data Management Office Last updated November 03, 2006; gfh
20 May 2011, dld - This cruise consisted of Leg 1 and Leg 2. Metadata is edited to reflect this information which was gleaned from the event log and the cruise report.
Leg 1 departed Astoria, OR late on 31 May and ended with a brief port stop in Newport, OR to exchange some science personnel and take on supplies on 8 June. The Chief Scientist was Robert Emmett.
Leg 2 began late in the afternoon of 8 June departing from Newport, OR and ended 18 June in Newport, OR. The Chief Scientist was Richard Brodeur. Methods & Sampling A neuston net with a 1-m wide by 0.3-m high mouth and 0.333-mm mesh was utilized for collection of all zooplankton samples. A General Oceanics flowmeter was attached in the mouth of the net in order to estimate the volume of water filtered during each tow. The net was towed out of the ship's wake for five minutes at approximately two knots (3.7 km/h). Upon retrieval, the net was hosed down and contents of the cod end were transferred to a sample jar. Large jellyfish and flotsam were rinsed off with seawater to remove any attached plankton and discarded at sea. The sample was preserved with formalin in ambient seawater to make a 5% formalin solution. Processing Description In the laboratory, the samples were washed over a 0.320-mm mesh sieve with tap water to remove formalin, then transferred to water. Additional extraneous contents were subsequently removed. To obtain displacement volumes, samples were allowed to settle overnight in Imhoff settling cones or graduated cylinders depending on the sample volume. Biovolumes (ml per 100 m3) were calculated from displacement volumes and flowmeter readings. Sample was transferred to a clear Pyrex dish on a white background for sorting and removing zooplankton .5 mm using a lighted magnifying glass. This size fraction was chosen based on prey size selected by juvenile coho and Chinook salmon in previous trophic analyses (Brodeur, 1991; Schabetsberger et al., 2003). |
| Website | |
| Platform | F/V Frosti |
| Report | |
| Start Date | 2002-08-01 |
| End Date | 2002-08-17 |
| Description | Methods & Sampling A neuston net with a 1-m wide by 0.3-m high mouth and 0.333-mm mesh was utilized for collection of all zooplankton samples. A General Oceanics flowmeter was attached in the mouth of the net in order to estimate the volume of water filtered during each tow. The net was towed out of the ship's wake for five minutes at approximately two knots (3.7 km/h). Upon retrieval, the net was hosed down and contents of the cod end were transferred to a sample jar. Large jellyfish and flotsam were rinsed off with seawater to remove any attached plankton and discarded at sea. The sample was preserved with formalin in ambient seawater to make a 5% formalin solution. Processing Description In the laboratory, the samples were washed over a 0.320-mm mesh sieve with tap water to remove formalin, then transferred to water. Additional extraneous contents were subsequently removed. To obtain displacement volumes, samples were allowed to settle overnight in Imhoff settling cones or graduated cylinders depending on the sample volume. Biovolumes (ml per 100 m3) were calculated from displacement volumes and flowmeter readings. Sample was transferred to a clear Pyrex dish on a white background for sorting and removing zooplankton .5 mm using a lighted magnifying glass. This size fraction was chosen based on prey size selected by juvenile coho and Chinook salmon in previous trophic analyses (Brodeur, 1991; Schabetsberger et al., 2003). |
| Website | |
| Platform | F/V Frosti |
| Report | |
| Start Date | 2002-06-08 |
| End Date | 2002-06-18 |
| Description | Event logs provide an overall summary of the sampling activities during a cruise. A hard copy of the event log is also included in the cruise report. Further documentation about event logs is available in Chief Scientist Data Reporting Requirements. For further information contact the Data Management Office Last updated November 03, 2006; gfh
20 May 2011, dld - This cruise consisted of Leg 1 and Leg 2. Metadata is edited to reflect this information which was gleaned from the event log and the cruise report.
Leg 1 departed Astoria, OR late on 31 May and ended with a brief port stop in Newport, OR to exchange some science personnel and take on supplies on 8 June. The Chief Scientist was Robert Emmett.
Leg 2 began late in the afternoon of 8 June departing from Newport, OR and ended 18 June in Newport, OR. The Chief Scientist was Richard Brodeur. Methods & Sampling A neuston net with a 1-m wide by 0.3-m high mouth and 0.333-mm mesh was utilized for collection of all zooplankton samples. A General Oceanics flowmeter was attached in the mouth of the net in order to estimate the volume of water filtered during each tow. The net was towed out of the ship's wake for five minutes at approximately two knots (3.7 km/h). Upon retrieval, the net was hosed down and contents of the cod end were transferred to a sample jar. Large jellyfish and flotsam were rinsed off with seawater to remove any attached plankton and discarded at sea. The sample was preserved with formalin in ambient seawater to make a 5% formalin solution. Processing Description In the laboratory, the samples were washed over a 0.320-mm mesh sieve with tap water to remove formalin, then transferred to water. Additional extraneous contents were subsequently removed. To obtain displacement volumes, samples were allowed to settle overnight in Imhoff settling cones or graduated cylinders depending on the sample volume. Biovolumes (ml per 100 m3) were calculated from displacement volumes and flowmeter readings. Sample was transferred to a clear Pyrex dish on a white background for sorting and removing zooplankton .5 mm using a lighted magnifying glass. This size fraction was chosen based on prey size selected by juvenile coho and Chinook salmon in previous trophic analyses (Brodeur, 1991; Schabetsberger et al., 2003). |
Program in a Nutshell
Goal: To understand the effects of climate variability and climate change on the distribution, abundance and production of marine animals (including commercially important living marine resources) in the eastern North Pacific. To embody this understanding in diagnostic and prognostic ecosystem models, capable of capturing the ecosystem response to major climatic fluctuations.
Approach: To study the effects of past and present climate variability on the population ecology and population dynamics of marine biota and living marine resources, and to use this information as a proxy for how the ecosystems of the eastern North Pacific may respond to future global climate change. The strong temporal variability in the physical and biological signals of the NEP will be used to examine the biophysical mechanisms through which zooplankton and salmon populations respond to physical forcing and biological interactions in the coastal regions of the two gyres. Annual and interannual variability will be studied directly through long-term observations and detailed process studies; variability at longer time scales will be examined through retrospective analysis of directly measured and proxy data. Coupled biophysical models of the ecosystems of these regions will be developed and tested using the process studies and data collected from the long-term observation programs, then further tested and improved by hindcasting selected retrospective data series.
U.S. GLOBEC (GLOBal ocean ECosystems dynamics) is a research program organized by oceanographers and fisheries scientists to address the question of how global climate change may affect the abundance and production of animals in the sea.
The U.S. GLOBEC Program currently had major research efforts underway in the Georges Bank / Northwest Atlantic Region, and the Northeast Pacific (with components in the California Current and in the Coastal Gulf of Alaska). U.S. GLOBEC was a major contributor to International GLOBEC efforts in the Southern Ocean and Western Antarctic Peninsula (WAP).
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) | |
| National Oceanic and Atmospheric Administration (NOAA) |