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Author
Kelly, T.B. ; Davison, P.C. ; Goericke, R. ; Landry, M.R. ; Ohman, M.D. ; Stukel, M,R.
Title
The Importance of Mesozooplankton Diel Vertical Migration for Sustaining a Mesopelagic Food Web
Type
$loc['typeJournal Article']
Year
2019
Publication
FRONTIERS IN MARINE SCIENCE
Abbreviated Journal
Volume
6
Issue
Pages
Keywords
Abstract
We used extensive ecological and biogeochemical measurements obtained from quasi-Lagrangian experiments during two California Current Ecosystem Long-Term Ecosystem Research cruises to analyze carbon fluxes between the epipelagic and mesopelagic zones using a linear inverse ecosystem model (LIEM). Measurement constraints on the model include C-14 primary productivity, dilution-based microzooplankton grazing rates, gut pigment-based mesozooplankton grazing rates (on multiple zooplankton size classes), Th-234:U-238 disequilibrium and sediment trap measured carbon export, and metabolic requirements of micronekton, zooplankton, and bacteria. A likelihood approach (Markov Chain Monte Carlo) was used to estimate the resulting flow uncertainties from a sample of potential flux networks. Results highlight the importance of mesozooplankton active transport (i.e., diel vertical migration) in supplying the carbon demand of mesopelagic organisms and sequestering carbon dioxide from the atmosphere. In nine water parcels ranging from a coastal bloom to offshore oligotrophic conditions, mesozooplankton active transport accounted for 18-84% (median: 42%) of the total carbon transfer to the mesopelagic, with gravitational settling of POC (12-55%; median: 37%), and subduction (2-32%; median: 14%) providing the majority of the remainder. Vertically migrating zooplankton contributed to downward carbon flux through respiration and excretion at depth and via mortality losses to predatory zooplankton and mesopelagic fish (e.g., myctophids and gonostomatids). Sensitivity analyses showed that the results of the LIEM were robust to changes in nekton metabolic demand, rates of bacterial production, and mesozooplankton gross growth efficiency. This analysis suggests that prior estimates of zooplankton active transport based on conservative estimates of standard (rather than active) metabolism are likely too low.
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$loc['no']
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COAPS @ user @
Serial
1084
Permanent link to this record
Author
Coles, V.J. ; Stukel, M.R. ; Brooks, M.T. ; Burd, A. ; Crump, B.C. ; Moran, M.A. ; Paul, J.H. ; Satinsky, B.M. ; Yager, P.L. ; Zielinski, B.L. ; Hood, R.R.
Title
Ocean biogeochemistry modeled with emergent trait-based genomics
Type
$loc['typeJournal Article']
Year
2017
Publication
Science (New York, N.Y.)
Abbreviated Journal
Science
Volume
358
Issue
6367
Pages
1149-1154
Keywords
Atlantic Ocean ; Biochemical Phenomena/genetics ; Metabolic Networks and Pathways/*genetics ; Metagenome ; *Metagenomics ; Microbial Consortia/*genetics ; Models, Biological ; Seawater/*microbiology ; Transcriptome
Abstract
Marine ecosystem models have advanced to incorporate metabolic pathways discovered with genomic sequencing, but direct comparisons between models and “omics” data are lacking. We developed a model that directly simulates metagenomes and metatranscriptomes for comparison with observations. Model microbes were randomly assigned genes for specialized functions, and communities of 68 species were simulated in the Atlantic Ocean. Unfit organisms were replaced, and the model self-organized to develop community genomes and transcriptomes. Emergent communities from simulations that were initialized with different cohorts of randomly generated microbes all produced realistic vertical and horizontal ocean nutrient, genome, and transcriptome gradients. Thus, the library of gene functions available to the community, rather than the distribution of functions among specific organisms, drove community assembly and biogeochemical gradients in the model ocean.
Address
Horn Point Laboratory, University of Maryland Center for Environmental Science (UMCES), Post Office Box 775, Cambridge, MD 21613, USA
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English
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0036-8075
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strtoupper('2').strtolower('9191900')
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$loc['no']
Call Number
COAPS @ rl18 @
Serial
989
Permanent link to this record
Author
Bozec, A., Kageyama, M., Ramstein, G., Creepon, M.
Title
Impact of a Last Glacial Maximum sea-level drop on the Mediterranean Sea
Type
$loc['typeJournal Article']
Year
2008
Publication
Earth and Planetary Science Letters
Abbreviated Journal
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Issue
Pages
submitted
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$loc['no']
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COAPS @ mfield @
Serial
679
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Author
Weissman, D. E. ; Bourassa, M. A.
Title
Measurements of the Effect of Rain-induced Sea Surface Roughness on the Satellite Scatterometer Radar Cross Section
Type
$loc['typeConference Article']
Year
2008
Publication
XXIX General Assembly of the International Union of Radio Science, Union of Radio Science International
Abbreviated Journal
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4
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$loc['no']
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COAPS @ mfield @
Serial
690
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Author
Bourassa, M. A. ; O'Brien, J. J.
Title
Non-inertial flow in NSCAT observations of Tehuantepec winds
Type
$loc['typeConference Article']
Year
1998
Publication
Proceedings of the NSCAT/QuikSCAT Science Team Workshop, Kona, Hawaii, USA
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$loc['no']
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COAPS @ mfield @
Serial
753
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Author
Bourassa, M. A. ; Legler, D. M. ; O'Brien, J. J.
Title
SeaWinds on QuikSCAT validation with research vessel winds
Type
$loc['typeConference Article']
Year
1999
Publication
Proceedings from the QuikSCAT Cal/Val – Early Science Meeting, [Available from Scatterometer Projects Office, Jet Propulsion Lab., Pasadena, CA 91109], Arcadia, CA, USA
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$loc['no']
Call Number
COAPS @ mfield @
Serial
789
Permanent link to this record
Author
Bourassa, M. A. ; Pegion, P. J. ; Legler, D. M. ; O'Brien, J. J.
Title
An objective technique for global gridded daily wind fields
Type
$loc['typeConference Article']
Year
1999
Publication
Proceedings from the QuikSCAT Cal/Val – Early Science Meeting, [Available from Scatterometer Projects Office, Jet Propulsion Lab., Pasadena, CA 91109], Arcadia, CA, USA
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$loc['no']
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COAPS @ mfield @
Serial
790
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Author
O'Brien, J. J. ; Bourassa, M. A.
Title
Scatterometry at COAPS
Type
$loc['typeConference Article']
Year
2000
Publication
Proceedings of the Ocean Vector Wind Science Team Meeting, Arcadia, CA, USA
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$loc['no']
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COAPS @ mfield @
Serial
803
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Author
Bellow, J. G.
Title
El Niño-Southern Oscillation Effects and Forecasting Chill Unit Accumulation for Deciduous Fruit Crops in the Southeastern USA
Type
$loc['typeConference Article']
Year
2006
Publication
Southern Region American Society for Horticultural Science 66th Annual Meeting. Feb. 4-6, Orlando, Florida, United States
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$loc['no']
Call Number
COAPS @ mfield @
Serial
919
Permanent link to this record
Author
Henson, J. I. ; Muller-Karger, F. ; Wilson, D. ; Morey, S. L. ; Maul, G. A. ; Luther, M. ; Kranenburg, C.
Title
Strategic geographic positioning of sea level gauges to aid in early detection of tsunamis in the Intra-Americas Sea
Type
$loc['typeJournal Article']
Year
2006
Publication
Science of Tsunami Hazards
Abbreviated Journal
Volume
25
Issue
3
Pages
173-207
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COAPS @ mfield @
Serial
940
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