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The major integrated science objective for the 2015 expeditions are to
investigate biological variability over diel timescales in a coherent body of water. More
specifically we will be measuring production and loss processes over the day-night cycle
related to productivity/respiration, growth/grazing, and more. These rate measurements
will be related to community composition, microorganism physiology, and also microbe-microbe
interaction via production and exchange of metabolites. The shipboard work will be in the
stable, low-variable oligotrophic open ocean at Stn ALOHA to connect this expedition with
the long-term times-series monitoring program. The sampling strategy will pursue a Lagrangian
approach whereby the research vessel will deploy and track a drifter during the period of
diel-orientated measurements.
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