Guaymas Basin vent field MOCNESS tow station list from R/V Atlantis II AII-112-28 in the Guaymas Basin from 1985-1985 (Vent Benthos project)

Website: https://www.bco-dmo.org/dataset/473767
Version: 2013-12-31

Project
» Benthic Ecology of Soft Sediments Associated with Hydrothermal Vents (Vent Benthos)
ContributorsAffiliationRole
Wiebe, Peter H.Woods Hole Oceanographic Institution (WHOI)Principal Investigator
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

Zooplankton from the Guaymas Basin deep-sea vent field were collected with a 1 m^2 MOCNESS to examine the distribution of total standing stock, taxonomic composition, size-frequency distribution of zooplankton, and the species composition of calanoid copepods. Low altitude ( similar to 100 m above the bottom) horizontal tows along and across the axis of the basin's southern trough, and oblique tows from the bottom of the basin ( similar to 2000 m) to the surface were made. Total biomass in near-bottom samples (range: 13-46 cc/1000 m^3) was only about a factor of 10 lower than in the upper 100 m. Of the 67 species of copepods identified in two samples taken on low altitude tows, only 15 occurred in both samples. Many of the species in this relatively diverse community remain to be described. Larval and post-larval forms of benthic clams, gastropods, polychaetes, and crustaceans associated with the vents were collected 100-200 m above the southern trough, indicating the post-larvae may play an active role in dispersal of hydrothermal vent species.


Methods & Sampling

Relevant References:

Drawings and descriptions of some deep-sea copepods living above the Guaymas Basin hydrothermal vent field.
Copley, N J; Wiebe, PH; Woods Hole Oceanographic Inst., MA (USA).  Technical Rpt. WHOI-90-15.

Deep-water zooplankton of the Guaymas Basin hydrothermal vent field.
Wiebe, PH; Copley, N; Van Dover, C; Tamse, A; Manrique, F. Deep-Sea Research35.6A (1988): 985-1013. 


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Data Files

File
moc_list.csv
(Comma Separated Values (.csv), 933 bytes)
MD5:55fd5c3b73d648ee8afb4341c62259a5
Primary data file for dataset ID 473767

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Parameters

ParameterDescriptionUnits
tow

MOCNESS tow id

alphanumeric
year

year

YYYY
month

month; local time

text
day

day of month; local time

integer
time_start_local

time tow began; local time

HHMM
time_end_local

time tow ended; local time

HHMM
lat_start

starting latitude; north is positive

decimal degrees
lon_start

starting longitude; east is positive

decimal degrees
lat_end

ending latitude; north is positive

decimal degrees
lon_end

ending longitude; east is positive

decimal degrees
depth_interval

depth interval of tow

meters
tow_type

how tow was drawn through the water

text
num_samples

number of successful samples in the tow

integer


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Instruments

Dataset-specific Instrument Name
MOC1
Generic Instrument Name
MOCNESS1
Dataset-specific Description
333 micron mesh, 9 nets
Generic Instrument Description
The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. The MOCNESS-1 carries nine 1-m2 nets usually of 335 micrometer mesh and is intended for use with the macrozooplankton. All nets are black to reduce contrast with the background. A motor/toggle release assembly is mounted on the top portion of the frame and stainless steel cables with swaged fittings are used to attach the net bar to the toggle release. A stepping motor in a pressure compensated case filled with oil turns the escapement crankshaft of the toggle release which sequentially releases the nets to an open then closed position on command from the surface. -- from the MOCNESS Operations Manual (1999 + 2003).


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Deployments

AII-112-28

Website
Platform
R/V Atlantis II
Report
Start Date
1985-07-24
End Date
1985-08-03
Description
Zooplankton from the Guaymas Basin deep-sea vent field were collected with a 1 m^2 MOCNESS to examine the distribution of total standing stock, taxonomic composition, size-frequency distribution of zooplankton, and the species composition of calanoid copepods.


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Project Information

Benthic Ecology of Soft Sediments Associated with Hydrothermal Vents (Vent Benthos)

Coverage: Guaymas Basin


Description not available.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)

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