Matrix of taxon (columns) by sample (rows) for substrates collected using HOV Alvin on R/V Atlantis cruise AT37-13 in the Pacific Ocean off Costa Rica from May to June 2017

Website: https://www.bco-dmo.org/dataset/747699
Data Type: Cruise Results
Version: 1
Version Date: 2020-01-09

Project
» Collaborative research: Quantifying the biological, chemical, and physical linkages between chemosynthetic communities and the surrounding deep sea (Costa Rica Seeps)
ContributorsAffiliationRole
Levin, Lisa AUniversity of California-San Diego (UCSD-SIO)Principal Investigator, Contact
Rouse, GregoryUniversity of California-San Diego (UCSD-SIO)Co-Principal Investigator
Rauch, ShannonWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager
Soenen, KarenWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager

Abstract
Matrix of taxon (columns) by sample (rows) for substrates collected using HOV Alvin on R/V Atlantis cruise AT37-13 in the Pacific Ocean off Costa Rica from May to June 2017


Coverage

Temporal Extent: 2017-05-21 - 2017-06-07

Dataset Description

Matrix of taxon (columns) by sample (rows) for substrates collected during AT 37-13. Samples were collected with HOV Alvin.


Acquisition Description

In situ carbonate rocks, and carbonate rocks, woods, and bones deployed for 7 years were collected across seepage gradients at Mound 12 using HOV Alvin, and washed in miliQ water onboard. Before preserving, the sample was kept cold and animals were picked to sample tissue for isotope analysis (see datasets "AT 37-13 Colonization experiment isotopes" and "AT37-13 Carbonate rocks isotopes" for isotopic data). The remaining washed sample was sieved through 0.3 mm mesh, separating the sample in two fractions (a fine fraction with the meiofauna, and a coarser one with the macrofauna), both preserved in 96% Ethanol. In the laboratory, the samples were washed in distilled water and sorted, and the animals were identified to major taxa, counted and preserved in 96% Ethanol.


Processing Description

BCO-DMO Processing: 

  • modified parameter names.

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Parameters

ParameterDescriptionUnits
SampleSubstrate type and substrate number unitless
Alvin_DiveNumber of the Alivn dive from which the sample was collected unitless
HabitatSeepage activity (active or inactive) unitless
AcariNumber of individuals identified from taxon Acari unitless
AmphipodaNumber of individuals identified from taxon Amphipoda unitless
AnomuraNumber of individuals identified from taxon Anomura unitless
BrachyuraNumber of individuals identified from taxon Brachyura unitless
CumaceaNumber of individuals identified from taxon Cumacea unitless
IsopodaNumber of individuals identified from taxon Isopoda unitless
OstracodaNumber of individuals identified from taxon Ostracoda unitless
ShrimpNumber of individuals identified from taxon Shrimp unitless
TanaidaceaNumber of individuals identified from taxon Tanaidacea unitless
AnthozoaNumber of individuals identified from taxon Anthozoa unitless
AsteroideaNumber of individuals identified from taxon Asteroidea unitless
OphiuroideaNumber of individuals identified from taxon Ophiuroidea unitless
AplacophoraNumber of individuals identified from taxon Aplacophora unitless
PlathelminthesNumber of individuals identified from taxon Plathelminthes unitless
BivalviaNumber of individuals identified from taxon Bivalvia unitless
GastropodaNumber of individuals identified from taxon Gastropoda unitless
PolyplacophoraNumber of individuals identified from taxon Polyplacophora unitless
PolychaetaNumber of individuals identified from taxon Polychaeta unitless
HydrozoaNumber of individuals identified from taxon Hydrozoa unitless
SipunculaNumber of individuals identified from taxon Sipincula unitless
CruiseCruise ID: AT37-13 or AT42-03 unitless

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Deployments

AT37-13

Website
Platform
R/V Atlantis
Start Date
2017-05-20
End Date
2017-06-11
Description
More cruise information is available from Rolling Deck to Repository (R2R): https://www.rvdata.us/search/cruise/AT37-13

AT37-13_Alvin_Dives

Website
Platform
Alvin
Start Date
2017-05-21
End Date
2017-06-08
Description
Collections of seep organisms in sediments and on rocks.


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Project Information

Collaborative research: Quantifying the biological, chemical, and physical linkages between chemosynthetic communities and the surrounding deep sea (Costa Rica Seeps)

Coverage: Costa Rica Pacific Margin


NSF abstract: If life were to disappear from the deep sea, would we notice? We only have a cursory understanding of this vast region and the connectivity among its communities and the rest of the oceans, and yet the ecosystems of the deep sea have been implicated in the larger function of the global marine ecosystems. We now rely on the deep ocean for food, energy, novel drugs and materials, and for its role in the global cycling of carbon, as well as for supporting services such as habitat creation, nutrient replenishment for shallow waters, and the maintenance of biodiversity. Cold seeps, active areas of the seafloor where methane and other chemicals are released, are key features along the continental margins worldwide. To characterize how methane seep communities interact with the surrounding ecosystems and vice versa, we will study methane seeps off the Pacific coast of Costa Rica in 2017 and 2018. It is the sphere of influence around the seep, both along the seafloor and up into the water column, that we seek to better understand. We will map the structure and the chemistry surrounding these habitats using a novel 3-dimensional framework, combining typical transects with vertical characterizations of the water column just above the seafloor. This will include measurements of methane flux into the water column and changes in the overlying carbonate chemistry and oxygen levels that are critical to our understanding of the effect of warming, oxygen loss and ocean acidification in this region. Within this framework, we will collect seep organisms in sediments and on rocks (including all sizes from microbes to large animals), and transplant some of these from within the area of seep influence to the background deep sea, and vice-versa. Together, these studies will help us to measure the size of the seep sphere of influence, and also demonstrate the role of these seeps within the deep sea and the greater, global, marine ecosystem. We will share this information with a group of teachers during a series of workshops in the San Diego area, at an exhibit at the Birch Aquarium, and through the work of an artist who has worked extensively with marine organisms in extreme environments. Chemosynthetic ecosystems are inextricably linked to the broader world-ocean biome and global biogeochemical cycles in ways that we are just beginning to understand. This research will identify the form, extent, and nature of the physical, chemical, and biological linkages between methane seeps and the surrounding deep-sea ecosystem. The proposed research builds critical understanding of the structural and functional processes that underpin the ecosystem services provided by chemosynthetic ecosystems. We target a critical continental margin, Costa Rica, where methane fates and dynamics loom large and play out in an setting that reflects many oceanographic stressors. We will use quantitative sampling and manipulative studies within a 3-dimensional oceanographic framework. We will ask what are the shapes of the diversity and density functions for organisms of different size classes and trophic position over the transition from the seep habitat through the ecotone to the background deep sea? Further, we will ask how do depth, dissolved oxygen concentrations, pH and carbonate ion availability, relative rates of fluid flux, and substrate (biogenic, authigenic carbonate, sediments) alter these linkages and interactions with the surrounding deep sea? Evidence for distinct transitional communities and biotic patterns in density and alpha and beta diversity will be quantified and placed in a global biogeographic context. All of these investigations will occur across biological size spectra: for microorganisms (archaea, bacteria, microeukaryotes), the macrofauna, and the megafauna that form biogenic habitats. Our research results will be interpreted in the context of potential effects of global ocean change in the equatorial Pacific to determine how the linkages with the surrounding deep sea will be altered as anthropogenic impacts proceed in the future.  Related publications: Levin, L.A., V.J. Orphan, G.W. Rouse, W. Ussler, A. E. Rathburn, G. S. Cook, S. Goffredi, E. Perez, A. Waren, B. Grupe, G. Chadwick, B. Strickrott. (2012). A hydrothermal seep on the Costa Rica margin: Middle ground in a continuum of reducing ecosystems. Proc. Royal Soc. B. 279: 2580-88 doi: 10.1098/rspb.2012.0205 Sahling, H., Masson, D. G., Ranero, C. R., Hühnerbach, V., Weinrebe, W., Klaucke, I., & Suess, E. (2008). Fluid seepage at the continental margin offshore Costa Rica and southern Nicaragua. Geochemistry, Geophysics, Geosystems 9: doi: 10.1029/2008GC001978


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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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