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Author Kuznetsova, Marina ♦ Lee, Cindy ♦ Aller, Josephine ♦ Frew, Nelson
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Amino Acid ♦ Consistent Microlayer Feature ♦ Coastal Massachusetts ♦ Sea Surface Mi-crolayer ♦ Apparent Effect ♦ Environmental Parameter ♦ Non-uniform Preferential Enrichment ♦ Total Bacteria Concentration ♦ Microlayer Water ♦ Regional Difference ♦ Sea Surface Microlayer ♦ Percent Bacteria ♦ Sargasso Sea ♦ Uniform Difference ♦ Water Mass ♦ Damaged Membrane ♦ Subsurface Water ♦ Open Ocean Site ♦ Different Technique ♦ Virus-like Particle ♦ Dissolved Amino Acid Composition ♦ Ocean Water ♦ Bulk Seawater ♦ Amino Acid Concentration
Description We investigated how regional differences in environmental parameters influenced enrichment of amino acids in the sea surface microlayer relative to underlying bulk seawater. Concentrations and compositions of dissolved free (DFAA), dissolved combined (DCAA), and particulate (PAA) amino acids were measured in the sea surface mi-crolayer and corresponding subsurface waters along a transect from coastal Massachusetts to open ocean waters of the Sargasso Sea. We also measured total bacteria concentrations, the percent bacteria with damaged membranes, and concentrations of virus-like particles. Microlayer samples taken by two different techniques—screen sampler (thickness 200–400 mm) and rotating drum (thickness 30–60 mm)—were compared. On average, concentrations of bacteria and amino acids in both subsurface and microlayer water were higher in water masses with higher fluo-rescence, lower temperature and salinity, and historically higher chlorophyll. The microlayer was enriched with amino acids and bacteria and, in most instances, virus-like particles. Consistent microlayer features, such as non-uniform preferential enrichment with DFAA and PAA and a uniform difference in dissolved amino acid composition between microlayer and subsurface water, were unrelated to environmental parameters measured. Wind, humidity, and light also had no apparent effects on amino acid concentration, composition, or enrichment in the microlayer in this study.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Institution in the North Atlantic Ocean, Limnol. Oceanogr