U.S. JGOFS: Microbial Communities in the Arabian Sea: Composition, Size, Spectra, and Growth Rates from Individual Cell Properties
U.S. JGOFS: Microbial Communities in the Arabian Sea: Composition, Size, Spectra, and Growth Rates from Individual Cell Properties
批准号:
9311113
负责人:
Robert Olson
金额:
$31.07万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1994
资助国家:
美国
项目状态:
已结题
起止时间:
1994-11-01 至 1999-04-30
中文摘要
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英文摘要
9311113 Olson A central mission of the JGOFS project in the Arabian Sea is to determine how efficiently the carbon pump operates in this region and how it responds to changes in physical forcing. To approach these problems we need to analyze the structure of the food web and determine how it varies with geographical and temporal gradients in nutrients supply and water column mixing. The juxtaposition of productive and oligotrophic oceanic systems in the Arabian Sea, and the regular oscillation between very high and low rates of nutrient supply under relatively constant conditions of solar illumination, offers opportunities for us to gain insights into food web regulation processes. In this project, Dr. Olson will (1) Characterize the distribution, abundance, and light scatter properties of the picoplankton and nanoplankton at the four intensive stations and at selected intermediate stations, using dual beam flow cytometry and DNA specific staining to distinguish heterotrophic as well as autotrophic organisms; (2) Estimate in situ growth rates of specific groups of phytoplankton, and grazing pressure on these groups, from diel patterns in cell number, light scatter properties and DNA content of individual cells from depth profiles; and (3) Test the hypothesis that the phytoplankton are physiologically N-limited during non-monsoon periods by measuring the C:N ratios of phytoplankton ( in particular, coccolithophores and picoplankton) purified by cell sorting. Relative responses of different groups of phytoplankton to N enrichment will be determined from 14C bicarbonate incubation experiments followed by cell sorting to obtain cell-specific growth rates.
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批准号:1130140
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项目类别:Continuing Grant
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资助金额:$93.43万
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财政年份:2011
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负责人:Robert Olson
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依托单位:
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批准号:1040810
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项目类别:Standard Grant
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资助金额:$3.26万
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财政年份:2010
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依托单位:
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批准号:0525700
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2005
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依托单位:
Laser-induced Breakdown Spectroscopy to Characterize Individual Marine Phytoplankton
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批准号:0350712
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2004
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负责人:Robert Olson
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依托单位:
Collaborative Research: Combining rRNA Probes and Cell Cycle Analysis to Investigate In Situ Growth Rates of Eucaryotic Phytoplankton
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批准号:0099109
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项目类别:Standard Grant
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资助金额:$45.0万
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财政年份:2001
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负责人:Robert Olson
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依托单位:
BIOCOMPLEXITY (IDEA): In Situ Measurement of Marine Microbes to Investigate Mechanisms of Community Structure Regulation
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批准号:0119915
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项目类别:Standard Grant
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资助金额:$169.1万
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财政年份:2001
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负责人:Robert Olson
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依托单位:
In Situ Flow Cytometric Analysis of Suspended Particles at a Coastal Observatory
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批准号:9907002
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项目类别:Standard Grant
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资助金额:$13.55万
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财政年份:1999
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负责人:Robert Olson
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依托单位:
Earthquake Disasters and Policy Change: A "Patterned Opportunism" Model of California Seismic Safety Innovations
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批准号:9814239
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项目类别:Continuing grant
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资助金额:$0.0万
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财政年份:1999
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负责人:Robert Olson
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依托单位:
Active Fluorescence Assays of Phytoplankton Physiological State: Population and Individual Cell Measurements
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批准号:9819206
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项目类别:Continuing Grant
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资助金额:$43.59万
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财政年份:1999
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负责人:Robert Olson
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依托单位:
Regulation of Primary Productivity in the Southern Ocean: Phytoplankton Photosynthesis Characteristics from Individual Cell Measurements
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批准号:9530718
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项目类别:Continuing Grant
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资助金额:$33.95万
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财政年份:1996
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负责人:Robert Olson
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依托单位:
An In Situ Flow Cytometer For The Optical Analysis Of Individual Particles In Seawater
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批准号:9416551
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项目类别:Continuing Grant
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资助金额:$23.0万
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财政年份:1995
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负责人:Robert Olson
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依托单位:
Hospital Evacuation in the Northridge, California Earthquake
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批准号:9416277
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1994
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负责人:Robert Olson
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依托单位:
NATO EAST EUROPE: Physiological Heterogeneity in Marine Phytoplankton Populations: Fluorescence Kinetics of Individual Cyanobacteria
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批准号:9450221
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项目类别:Standard Grant
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资助金额:$0.3万
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财政年份:1994
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负责人:Robert Olson
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依托单位:
Second National Workshop on Earthquake Casualty Estimation
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批准号:9319417
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1994
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负责人:Robert Olson
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依托单位:
Phytoplankton Populations in the Equatorial Pacific: Distributions and Growth Rates from Individual Cell Properties
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批准号:9024380
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项目类别:Continuing Grant
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资助金额:$22.0万
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财政年份:1991
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负责人:Robert Olson
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依托单位:
Collaborative: Putative Prochlorophyte Picoplankton: Ultra- structure Pigments and Molecular Systematics
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批准号:9119919
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项目类别:Continuing Grant
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资助金额:$9.93万
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财政年份:1991
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负责人:Robert Olson
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依托单位:
Time Series Analysis of Phytoplankton Population Dynamics atTwo Stations off Bermuda
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批准号:9014724
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项目类别:Continuing Grant
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资助金额:$17.11万
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财政年份:1991
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负责人:Robert Olson
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依托单位:
Elemental Analyses of Marine Phytoplankton Purified by Cell Sorting
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批准号:9012147
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项目类别:Continuing Grant
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资助金额:$34.5万
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财政年份:1990
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负责人:Robert Olson
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依托单位:
Urban Heavy Rescue Following Earthquakes
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批准号:8815527
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1989
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负责人:Robert Olson
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依托单位:
Role of Silicon and Light in Regulating Diatom Cell Cycles
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批准号:8717261
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项目类别:Standard Grant
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资助金额:$1.95万
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财政年份:1988
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负责人:Robert Olson
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依托单位:
海外基金