Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters ...

• Main Authors: Dlugosch, L., Billerbeck, S., Winkler, H., Milke, F., Wolterink, M., Wienhausen, G., Voss, D., Giebel, H.-A., Wietz, M., Arnosti, C., Balmonte, J.P., Bakenhus, I., Badewien, T.H., Simon, M., Meyerjürgens, J., Kuerzel, B., Henkel, R.
• Format: Text
• Language: English
• Published: Frontiers Media S.A. 2021
• Subjects: Pacific; Subarctic
• Online Access: https://dx.doi.org/10.17615/qapg-4305; https://cdr.lib.unc.edu/concern/articles/k0698k27r

The Pacific Ocean constitutes about half of the global oceans and thus microbial processes in this ocean have a large impact on global elemental cycles. Despite several intensely studied regions large areas are still greatly understudied regarding microbial activities, organic matter cycling and biogeography. Refined information about these features is most important to better understand the significance of this ocean for global biogeochemical and elemental cycles. Therefore we investigated a suite of microbial and geochemical variables along a transect from the subantarctic to the subarctic Pacific in the upper 200 m of the water column. The aim was to quantify rates of organic matter processing, identify potential controlling factors and prokaryotic key players. The assessed variables included abundance of heterotrophic prokaryotes and cyanobacteria, heterotrophic prokaryotic production (HPP), turnover rate constants of amino acids, glucose, and acetate, leucine aminopeptidase and β-glucosidase activities, ...