Deployment: AT15-44

2009-02-21 - 2009-03-08 Pacific, off Costa Rica Platform:R/V Atlantis (vessel)

Description

Cruise Objective: We will conduct research in exposed carbonate ecosystems on the Costa Rica margin (700-1,400 m), to test hypotheses about the influence of active seepage on carbonate rock animal communities and their successional phases, on microbial activity including anerobic methane oxidation and sulfide oxidation, on carbon isotopic composition of shelled organisms, and on phylogenetic affinities of animals. To test hypotheses we will sample existing authigenic carbonates from 3 levels of seepage activity: highly active, weak and inactive. Activity level will be defined by presence of /or proximity to bubbles/shimmering water, microbial mat development and megafauna, as well as previous fluid flow and composition measurements made at the Costa Rica study sites. We will sample 5 to 8 locations with each activity level in each study region, controlling for rock size and carbonate configuration when possible.

ALVIN: During 3 dives at each of 4 study sites we will conduct bottom surveys and video transects, measure S, T, O2, select 4 to 8 highly active, weakly active and inactive sites, photograph organisms and classify rocks in situ, collect rocks of varying sizes with organisms, and sample nearby sediments and biotic substrata (mussels, tube worms) for taxonomic comparisons. The remaining 2 dives at Costa Rica seeps will be used to conduct follow-up survey and sampling of the most promising locations, based on shipboard sample observations. Nighttime operations will consist of CTD casts (a minimum of one each at Mound 11, Mound 13, Jaco Scarp and Mound Quepos), multicoring (adjacent to mounds and at 400 m and 600 m sites in the OMZ), and pre-dive seabeam surveys.

Cruise information and original data are available from the NSF R2R data catalog.


DatasetLatest Version DateCurrent State
Alvin dive log from off Costa Rica from R/V Atlantis AT15-59, AT15-44 in the Pacific Ocean off Costa Rica, Pacific, off Costa Rica from 2009-2010 (Seep Carbonate Ecology CROCKS II project)2012-01-19Final with updates expected
Methane seep hard substrate species collected on RV/Atlantis AT15-44, AT15-59, AT15-68, AT18-10 in the Pacific, off Costa Rica and USA from 2009-2011 (Seep Carbonate Ecology CROCKS II project)2012-10-24Final no updates expected
Station locations for CROCKS & HROCKS projects from R/V Atlantis AT15-44, AT15-59, AT15-68, AT18-10 in the Pacific, off Costa Rica and USA from 2009-2011 (Seep Carbonate Ecology CROCKS II project)2012-10-24Final no updates expected
Cruise tracks for the CROCKS_II and HROCKS projects from R/V Atlantis AT15-44, AT15-59, AT15-68, AT18-10 in the Pacific, off Costa Rica and USA from 2009-2011 (Seep Carbonate Ecology CROCKS II project)2012-10-25Final no updates expected
C14 and N15 isotopes in rocks and animals from methane seep hard substrate ecosystems from R/V Atlantis AT15-44 in the Pacific, off Costa Rica from 2009-2009 (Seep Carbonate Ecology CROCKS II project)2012-10-25Final no updates expected
Species abundance on carbonate rocks from active and inactive sites at methane seeps from R/V Atlantis AT15-44, AT15-68 in the Pacific, off Costa Rica and USA, 2009-2010 (CROCKS II project)2012-10-30Final no updates expected
CTD station profile data from R/V Atlantis AT15-44 in the Pacific, off Costa Rica from February to March 2009 (Seep Carbonate Ecology CROCKS II project)2012-11-14Final no updates expected
16S rRNA gene and particulate monooxygenase diversity from R/V Atlantis AT15-68, AT18-10, AT15-44, AT15-59 off Costa Rica and USA, Pacific Ocean, 2009-2011 (Authigenic Carbonate Ecosystems project)2014-01-31Final no updates expected

Deployment Report


People

Chief Scientist: Lisa A. Levin
University of California-San Diego Scripps


Synonyms