Microbial Ecology and Biogeochemistry

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H. Ducklow, PI

Microorganisms < 1 µm long form an important ecosystem component at the base of ocean foodwebs and catalyze critical biogeochemical transformations in the carbon, nitrogen and other elemental cycles. The goal of the PAL microbial component is to document the long term trends and variability of bulk bacterial and Archaeal biomass and production rates in space and time. Microbial observations have been made on the LTER sampling grid encompassing the offshore domain and in the inshore regime near Palmer Station since 2002. The goal of the biogeochemistry component is to understand how climate change and ecosystem responses impact key biogeochemical properties and processes: dissolved inorganic carbon and nutrients, net community production and particle export. The Southern Ocean is an important sink for atmospheric CO2; our studies of the metabolically active gases are aimed at clarifying the linkages among biological and physical processes affecting CO2 storage.



Datasets in Catalog


Selected Publications

Ducklow HW, MR Stukel, R. Eveleth, SC Doney, T Jickells, O Schofield, AR Baker, J Brindle, R Chance and Nicolas Cassar. 2018. Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the western Antarctic Peninsula 2012–2014. Phil. Trans. R. Soc. A 20170177. http://dx.doi.org/10.1098/rsta.2017.0177

Bowman, J. S., L. A. Amaral-Zettler, J. J Rich, C. M Luria, and H. W. Ducklow. 2017. Bacterial community segmentation facilitates the prediction of ecosystem function along the coast of the western Antarctic Peninsula. ISME J. doi: 10.1038/ismej.2016.204

Luria, C., L. Amaral-Zettler, H. Ducklow and J. Rich. Seasonal succession of bacterial communities in coastal waters of the Western Antarctic Peninsula. 2017. Front. Mar. Sci. 7:1731. doi: 10.3389/fmicb.2016.01731

Kim, H., S. C. Doney, R. A. Iannuzzi, M. P. Meredith, D. G. Martinson, and H. W. Ducklow. 2016. Climate forcing for dynamics of dissolved inorganic nutrients at Palmer Station, Antarctica: An interdecadal (1993–2013) analysis. Journal of Geophysical Research: Biogeosciences: 10.1002/2015JG003311.

Stukel, M. R., E. Asher, N. Couto, O. Schofield, S. Strebel, P. Tortell, and H. W. Ducklow (2015), The imbalance of new and export production in the western Antarctic Peninsula, a potentially “leaky” ecosystem, Global Biogeochem. Cycles, 29, 1400–1420, doi:10.1002/2015GB005211.