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2015 SCOPE Transect




In March, 2015 SCOPE scientists participated in a transect cruise from Portand, Oregon to Honolulu, Hawaii on the R/V Kilo Moana. The science plan centered around the measurement of the diel cycle of growth, mortality and metabolite production across a gradient from the productive coastal ocean to the oligotrophic North Pacific Subtropical Gyre. Cruise participants worked collaboratively to (1) conduct real time cell-size based measurements of Prochlorococcus growth and mortality and pair these with proxies for net productivity based on the diel cycle of particulate carbon; (2) determine the presence/abundance of Prochlorococcus phages as a causal mechanism for observed patterns of Prochlorococcus mortality, (3) measure the dawn/dusk inventory of distinct dissolved and particulate metabolites (4) carry out metaproteomic analyses and targeted peptide analysis on the microbial community. All samples were collected from the ship's underway system.