Dataset: Deep-sea benthos
Deployment: PS0819

Deep-sea benthos counts from cores (>300 micron), Pacific US continental rise

Principal Investigator:

Dr David Thistle (Florida State University, FSU - EOAS)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Do sediment-dwelling species have large ranges along a continental slope? (Species ranges)

Current State:

Final no updates expected

Version Date:

2013-08-30

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/456095/data

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Description

This dataset contains counts of the following benthic taxonomic groups: Desmoscolecid nematodes, non-Desmoscolecidae, nauplii, copepods, kinorhynchs, and ostracods. Station data includes location, depth, distance between stations(km), depth difference between stations (m), distance between lowerings (km), oxygen, temperature, and salinity.

Methods & Sampling

Dataset acquisition description

Benthic cores were taken along a transect of the Pacific US continental rise from southern Oregon to San Diego. We sampled with an Ocean Instruments (San Diego, CA) MC 800 multiple corer. The multiple corer had eight 10-cm (inner diameter) core tubes. The team processed each core from a lowering in a predetermined, random order. The team imaged the sediment through the side of the transparent core tube, noted any unusual features, collected the water overlying the sediment, imaged the sediment surface, and collected the top 1 cm of sediment. The water and sediment samples were combined, preserved with cold, 95% ethyl alcohol, and stored at -20ºC.

Salinity, temperature, and oxygen data were collected at about 50 meters above the bottom at each station.

Data Processing Description

Dataset Processing Description

In the laboratory, we randomly selected a station, a lowering within that station, and an apparently undisturbed core from that lowering. We repeated this procedure three times, yielding 24 samples, which were processed in this order. For each sample, we measured its volume and separated the 300-µm fraction from the 30-µm fraction. After staining with rose bengal, one person sorted both fractions from each sample under a stereomicroscope at 25×. The sorter removed and counted nematodes, nauplii, benthic copepods, kinorhynchs, and ostracods and noted which nematodes belonged to the family Desmoscolecidae. A second person sorted each sample a second time to ensure accuracy. We included the specimens of these groups retained by the 300-µm sieve in our counts.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0727243	NSF Division of Ocean Sciences

Instruments

CTD Sea-Bird 911

Supplied Description:

Sea Bird 911+CTD/Rosette (12 position) with standard sensor suite. These include the following: redundant temperature and conductivity sensors, Beckman-type oxygen sensor, transmissometer, fluorometer, PAR(scaler) sensor and altimeter. Standard Niskin bottle size is 10 liter. All sensors rated to 6000m except PAR sensor (1000m).

Instrument Type

Generic Name: CTD Sea-Bird 911

Acronym: CTD SBE 911

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0035/

Generic Description:

The Sea-Bird SBE 911 is a type of CTD instrument package. The SBE 911 includes the SBE 9 Underwater Unit and the SBE 11 Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). More information from Sea-Bird Electronics.

Multi Corer

Supplied Description:

Ocean Instruments (San Diego, CA) MC 800 multiple corer with eight 10-cm (inner diameter) core tubes.

Instrument Type

Generic Name: Multi Corer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/51/

Generic Description:

The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408.

Sea-Bird SBE 43 Dissolved Oxygen Sensor

Supplied Name: SBE 43 Dissolved Oxygen Sensor

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 43 Dissolved Oxygen Sensor

Acronym: SBE-43 DO

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0036/

Generic 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

Sea-Bird SBE-3 Temperature Sensor

Supplied Description:

Dual SBE 3Plus Temperature Sensor provided by the ship.

Instrument Type

Generic Name: Sea-Bird SBE-3 Temperature Sensor

Acronym: SBE-3 Temperature

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

The SBE-3 is a slow response, frequency output temperature sensor manufactured by Sea-Bird Electronics, Inc. (Bellevue, Washington, USA). It has an initial accuracy of +/- 0.001 degrees Celsius with a stability of +/- 0.002 degrees Celsius per year and measures seawater temperature in the range of -5.0 to +35 degrees Celsius. more information from Sea-Bird Electronics

Sea-Bird SBE-4 Conductivity Sensor

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE-4 Conductivity Sensor

Acronym: SBE-4 Conductivity

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0417/

Generic Description:

The Sea-Bird SBE-4 conductivity sensor is a modular, self-contained instrument that measures conductivity from 0 to 7 Siemens/meter. The sensors (Version 2; S/N 2000 and higher) have electrically isolated power circuits and optically coupled outputs to eliminate any possibility of noise and corrosion caused by ground loops. The sensing element is a cylindrical, flow-through, borosilicate glass cell with three internal platinum electrodes. Because the outer electrodes are connected together, electric fields are confined inside the cell, making the measured resistance (and instrument calibration) independent of calibration bath size or proximity to protective cages or other objects.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise identification	unitless	cruise_id
date_local	date, local time	YYYYMMDD	date_local
sta	station number	unitless	sta
lat	latititude; East is positive	decimal degrees	lat
lon	longitude; North is positive	decimal degrees	lon
depth	depth of core sample	meters	depth
dist_bet_sta	distance between stations	kilometers	no_bcodmo_term
depth_diff_sta	depth difference between stations	meters	no_bcodmo_term
dist_bet_cores_km	distance between lowerings	kilometers	no_bcodmo_term
O2	dissolved oxygen concentration at about 50 meters above the bottom	nd	O2
temp	temperature at about 50 meters above the bottom	degrees Celsius	temp
sal	salinity at about 50 meters above the bottom	PSU	sal
sample	sample number	unitless	sample
taxon	taxonomic group	unitless	taxon
count	number of animals in sample	unitless	count

Database

Contribute Data

Dataset: Deep-sea benthos
Deployment: PS0819

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Deep-sea benthosDeployment: PS0819

Dataset acquisition description

Dataset Processing Description

Dataset: Deep-sea benthos
Deployment: PS0819