Multicore log for Atlantis-15-59/Alvin cruise off Costa Rica in the Pacific Ocean from January 2010 (Seep Carbonate Ecology CROCKS II project)

Website: https://www.bco-dmo.org/dataset/3616
Version:
Version Date: 2012-01-30

Project
» Short-term colonization processes at Costa Rica methane seeps (Seep Carbonate Ecology CROCKS II)
ContributorsAffiliationRole
Levin, Lisa A.University of California-San Diego (UCSD-SIO)Chief Scientist
Orphan, Victoria J.California Institute of Technology (Caltech)Co-Chief Scientist
Rathburn, Anthony EIndiana State University (ISU)Co-Chief Scientist
Rouse, GregoryUniversity of California-San Diego (UCSD-SIO)Co-Chief Scientist
Copley, NancyWoods Hole Oceanographic Institution (WHOI)BCO-DMO Data Manager


Dataset Description

Atlantis/Alvin cruise off Costa Rica

The primary goal of the cruise was to recover biological experiments deployed at active and inactive seep areas during Feb./March 2009. We successfully recovered 23/24 experimental units deployed on Mound 12, Costa Rica. One was simply missing on the sea floor. By using a gear elevator each day to maximize sample collection (and reserve ALVIN basket space for experiments) we were able to recover our experiments rapidly. This left us time for exploration of unusual biological communities at Jaco Scar.


Methods & Sampling

Equipment used: standard Alvin tubecores; Ocean Instruments multicorer; Seabird CTD with O2 sensor.

Where indicated, sediment samples from tube cores were sectioned vertically and preserved in buffered formaldehyde (standard procedures) or frozen at -80ºC.

Colonization substrates had macrofauna (>0.3 mm) and meiofauna (>0.42 microns) removed and preserved.  Representative individuals were frozen for subsequent stable isotope analyses.


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Data Files

File
multicore_log.csv
(Comma Separated Values (.csv), 1.26 KB)
MD5:32a9919bea17930c3f83ccc5366bb48b
Primary data file for dataset ID 3616

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Parameters

ParameterDescriptionUnits
lat

latitude; North is positive

decimal degrees
lon

longitude; East is positive

decimal degrees
depth_w

water depth

meters
treatment

type of sample

text
replicate

replicate information

text
multicore_id

multicore sample number

text
yrday_gmt

GMT day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon). In the case of drifter data, year day may be continuous over a multi year period. No time in this dataset so no decimal is added to the yearday.

1 to 365
year

year of sampling.

yyyy
month

month, GMT time.

1 to 12
day

day of sampling, GMT

1 to 31
time

time of day in GMT defined as HHMM



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Instruments

Dataset-specific Instrument Name
Multi Corer
Generic Instrument Name
Multi Corer
Dataset-specific Description
Ocean Instruments multicorer
Generic Instrument 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.


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Deployments

AT15-59

Website
Platform
R/V Atlantis
Start Date
2010-01-06
End Date
2010-01-13
Description
Costa Rica seafloor methane seeps 8 deg 55 N 84 depth 990m. Included Alvin dives 4586-4591. The primary goal of the cruise was to recover biological experiments deployed at active and inactive seep areas during Feb./March 2009. We successfully recovered 23/24 experimental units deployed on Mound 12, Costa Rica. One was simply missing on the sea floor. By using a gear elevator each day to maximize sample collection (and reserve ALVIN basket space for experiments) we were able to recover our experiments rapidly. This left us time for exploration of unusual biological communities at Jaco Scar. Cruise information and original data are available from the NSF R2R data catalog. Cruise dates changed Feb 2015 to match WHOI ship schedule and R2R.


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Project Information

Short-term colonization processes at Costa Rica methane seeps (Seep Carbonate Ecology CROCKS II)

Coverage: Costa Rica seafloor methane seeps 8 deg 55 N 84 deg 18 W depth 990m


This RAPID project will conduct 5 submersible or ROV dives to collect a series of colonization experiments deployed in March 2009 on Mound 12 off Costa Rica (997 m). These experiments were deployed opportunistically, and to optimize the information that could be obtained, the PIs needed to recover them within a 12 month time frame. Early colonization of rock, wood, shell and tube substrates will be studied. The microbes, foraminiferans and metazoans present after 6-12 mo will be compared to those colonizing similar experiments to be deployed at Hydrate Ridge, where seeps occur within an oxygen minimum zone. The overall project goal is to integrate physical, geological, chemical and biological data to develop a holistic view of the influence of seep-generated carbonate hard-ground ecosystems on margins.

The objectives of the research are to (a) Compare colonizers at seeps off Costa Rica and Hydrate Ridge to assess the importance of different oxygen regimes in the development of anaerobic methane oxidation, sulfide oxiders and other microbial metabolisms on hard substrates, and to evaluate their roles in driving protozoan and metazoan succession at methane seeps. (b) Deploy a suite of biotic and abiotic substrates to distinguish the specific roles of carbonate substrate from those of other hard substrates (wood, clam and mussel shells, worm tubes) available. (c) Explore the similarity of vent and seep colonization processes by comparing colonization at the Costa Rica seeps, where vent species are common, to the Hydrate Ridge seeps, where they are not. (d) Determine whether there are diagnosable biogeographic isotope or other biomarker signatures from newly recruited Costa Rica microbial, foraminiferal and animal populations at active vs. inactive seeps, and whether these differ from those at Hydrate Ridge.

This research will involve international participation from Costa Rican scientists at the Univ. of Costa Rica.



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Funding

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

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