Dataset: DWH_micronekton

Name: Mesopelagic micronekton abundances from the Deepwater Horizon Oil Spill area, collected from the R/V Weatherbird II WB1105, WB1205 cruises in the Gulf of Mexico, from 2010-2011 (DWH Micronekton project)
Published: 2012-08-30
Keywords: oceans

Cite This Dataset

Spatial Extent: N:28.6365 E:-86 S:27 W:-87.8685

Temporal Extent: 2010-09-03 - 2011-09-17

Project:

RAPID Deepwater Horizon Oil Spill: Impact of sub-surface oil plumes on mesopelagic micronekton (DWH Micronekton)

Chief Scientist:

Dr Joseph J. Torres (University of South Florida, USF)

BCO-DMO Data Manager:

Danie Kinkade (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

2012-08-30

Version Date:

2012-08-30

Restricted:

Validated:

Current State:

Final with updates expected

Mesopelagic micronekton abundances from the Deepwater Horizon Oil Spill area, collected from the R/V Weatherbird II WB1105, WB1205 cruises in the Gulf of Mexico, from 2010-2011 (DWH Micronekton project)

Expand/Collapse All

Description

This dataset is part of an investigation of the impact of the BP oil spill on the northern Gulf of Mexico ecosystem, focusing on the mesopelagic fauna. These observations and measurements were obtained during two R/V Weatherbird cruises in the specific regions one year apart. They will be compared to many other cruises preceding to assess mesopelagic communities at both reference and within-plume stations with respect to:
- abundance and distribution
- species composition

Methods & Sampling

WB1105:

Sampling at each of the general sampling sites will consist of two types of midwater tows interspersed with CTD casts. Tows will be at the most comfortable heading and will remain within 20 NM of each general station location.

Day tows will used the MOC-4 exclusively and will be in the upper 1000m of the water column. The winch will be in constant use during all tows, either paying out or taking up. Night tows will initially use the MOC-4, then the net will be switched to the 9 m2 Tucker tow for repetitive tows in the upper 400 m for the purpose of maximizing catch of target species.

WB1205:

Sampling will consist of one type of midwater tow (Tucker trawls) interspersed with CTD casts. Tows will be at the most comfortable heading and will remain within 20 NM of DSH-09. CTD casts will take place morning and evening.

Day and night tows will use the 9 m2 Tucker trawl exclusively and will be in the upper 1000m of the water column. The winch will be in constant use during all tows, either paying out or taking up. Night tows will include, but not be limited to repetitive tows in the upper 500 m for the purpose of maximizing catch of target species.

Data Processing Description

BCO-DMO Processing Notes:

- Data table was extracted from the submitted dataset metadata form.
- Data was transposed from horizontal to vertical orientation.
- Parameter names were edited to conform to BCO-DMO convention.
- Columns for lat/lon were added for each station using proposed position
information included in the dataset information form.
- Version line was added

Data Files

File
DWH_micronekton.csv (Comma Separated Values (.csv), 58.90 KB) MD5:c4ecdbe99ab976420edcf2deea6bfa1e Primary data file for dataset ID 3705

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1047693

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
WB1105	RAPID_I	2010-09-03	R/V Weatherbird II	Dr Joseph J. Torres (Chief Scientist)	data info
WB1205	RAPID_II	2011-09-12	R/V Weatherbird II	Dr Joseph J. Torres (Chief Scientist)	data info

Instruments

MOCNESS

Supplied Description:

Day tows will use the MOC-4 exclusively and will be in the upper 1000m of the water column.

Instrument Type

Generic Name: MOCNESS

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0097/

Generic Description:

The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. There are currently 8 different sizes of MOCNESS in existence which are designed for capture of different size ranges of zooplankton and micro-nekton Each system is designated according to the size of the net mouth opening and in two cases, the number of nets it carries. The original MOCNESS (Wiebe et al, 1976) was a redesigned and improved version of a system described by Frost and McCrone (1974).(from MOCNESS manual) This designation is used when the specific type of MOCNESS (number and size of nets) was not specified by the contributing investigator.

Tucker Trawl

Supplied Description:

A 9m2 Tucker trawl (for deep tows where up to three replicate nets can be sequentially operated) for either day and/or night tows will be used within the upper 1000m of the water column.

Instrument Type

Generic Name: Tucker Trawl

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/NETT0161/

Generic Description:

The original Tucker Trawl, a net with a rectangular mouth opening first built in 1951 by G.H. Tucker, was not an opening/closing system, but shortly thereafter it was modified so that it could be opened and closed. The original had a 183 cm by 183 cm flexible rectangular mouth opening 914 cm long net with 1.8 cm stretched mesh for the first 457 cm and 1.3 cm mesh for last 457 cm. 152 cm of coarse plankton or muslin netting lined the end of the net. Tucker designed the net to collect animals associated with the deep scattering layers, principally euphausiids, siphonophores, and midwater fish. (from Wiebe and Benfield, 2003). Currently used Tucker Trawls usually have 1-m2 openings and can have a single net or multiple nets on the frame.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
cruiseid	Unique cruise identifier, extracted from metadata	dimensionless	cruiseid
year	Year in YYYY format, obtained from metadata.	dimensionless	year
station_prop	Proprosed station identifier.	dimensionless	station
lat_prop	Nominal or proposed latitude of station locations, obtained from metadata.	degrees, decimal minutes	lat
lon_prop	Nominal or proposed longitude of station locations, obtained from metadata.	degrees, decimal minutes	lon
depth_w_prop	Nominal or estimated water depth, obtained from metadata.	meters	depth_w
taxon	Taxon of sample individual. Most of the time, this taxon level was Order.	dimensionless	taxon
species	Species name of sample individual.	dimensionless	species
count	Total number of individuals counted, originally reported as 'number'.	dimensionless	count
weight	Total weight for each species and each order, units unknown.	unknown	weight

Status message

Database

Contribute Data

Dataset: DWH_micronekton