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Synechococcus microscopy counts collected from CTD casts aboard R/V ATLANTIS, from the euphotic zone of the Eastern Tropical South Pacific during 2010-02 (NCEI Accession 0069125)
This cruise provides the opportunity to expand the database we are amassing on Synechococcus diversity and distribution for our NSF project "The role of iron (Fe) in controlling in situ distributions and activities of marine Synechococcus" into an area that has not been well studied, and also provides the opportunity to test out hypotheses with controlled experimental manipulations of Fe, light, and temperature in the field. The Eastern Tropical South Pacific (ETSP) is a highly productive area where the small size (0.6-2 micron) fraction generally dominates biomass and accounts for ~40% of primary productivity (Duhamel & Moutin 2009). Synechococcus, a cosmopolitan picocyanobacterium, is a component of this fraction, and can be greater than 104 ml-1 in parts of the upwelling (Masquelier & Vaulot 2008). Despite this recent knowledge, the area is chronically under sampled and our understanding of the dynamics of picocyanobacteria in this region are lacking.
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Temperature, salinity, microplankton abundance and other data from three cruises of R/V Cape Hatteras in the NW Atlantic to study bacterial activity, 2001-08 to 2002-03 (NCEI Accession 0001675)
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This data is from three cruises on R/V Cape Hatteras taken in Aug and October 2001, and March 2002 from Boothbay Harbor Maine to the Sargasso Sea. The purpose of these cruises was to study single-cell bacterial activity using the CTC assay (Sieracki et al. 1999) in context with other microplankton parameters. Onboard flow cytometry (B-D FACScan instrument) was used to count pico- and nanoplankton, including total bacteria and CTC-active bacteria. Pico- and nanophytoplankton were measured live (no sample preservation). CTD data is reported here along with the pico- and nanoplankton abundances. The CTD data is from the bottle trip depths only. The SeaBird CTD was provided by the ship. At stations a drifting drogue, marking the water at 15m, was deployed and the CTD vertical profiles were taken at the drogue.
Nutrient and physical profile data from four Microbial Exchanges and Coupling in Coastal Atlantic Systems (MECCAS) cruises collected aboard the R/V Gyre at the mouth of the Chesapeake Bay and northern Atlantic Ocean from February 17, 1985 to September 7, 1986 (NCEI Accession 8800324)
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Microbial Exchanges and Coupling in Coastal Atlantic Systems (MECCAS) cruise data collected aboard the R/V Gyre at the mouth of the Chesapeake Bay and northern Atlantic Ocean. Each of four MECCAS cruise data sets is divided into 3 files. File 1 contains underway surface mapping data. For this study 12 parameters were measured, including location, temperature, salinity, ammonium, nitrate, nitrite, phosphate, and silicate at +/- 0.03-0.1 um. File 2 contains vertical profiles at stations along mapping routes; the 12 parameters measured were the same as those for surface mapping data as described above. File 3 contains vertical profiles at drogue stations; 96 parameters were measured. Parameters include CTD data, zooplankton data (biomass, heterotrophic and autotrophic grazing rates, and production rate estimates), bacteria data (cell count, estimated volume, nutrient assimilation, and production rate estimates), and nanoplankton data (abundance of pigmented and non-pigmented eukaryotes and estimates of bacterial removal rates). Nutrient data contained in file 3 includes dissolved free amino acids (carbon content in free serine, glycine, and alanine in nanograms/liter.
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