Phytoplankton Sampling Begins

Dena Seidel reports that despite the weather, Oscar Schofield and Grace Saba, both of IMCS and of the LTER phytoplankton group, keep sampling.

In the photo below, you can see Oscar (brown coat) and Grace (black coat) on deck in 50 knot winds collecting water that has been incubating to test their phytoplankton and chlorophyll levels.  Phytoplankton a very small photosynthetic organisms that use chlorophyll to capture energy from sunlight for photosynthesis.

Phytoplankton sampling on the deck of the Gould. Jan 2013 (Photo: Chris Linder)


So what are phytoplankton and why are they so important?

Phytoplankton are photosynthesizing microscopic organisms that live near the surface of the water.  Phytoplankton use sun light to take up and convert atmospheric carbon dioxide into biomass (cellular components of each cell) and oxygen. Because they are able to use the sun’s energy to create biomass, they are called primary producers.  Despite being limited by sunlight for half of the year, Antarctic phytoplankton (especially along the western Antarctic Peninsula) are among the most prodigious primary producers in the ocean. Furthermore, their role as primary producers of biomass makes their abundance or decline critical to the health and well being of Antarctic ecosystems.

In addition to their role at the base of the Antarctic marine ecosystem, the fate of phytoplankton biomass is crucial to understanding climate change feedback loops. By conducting experiments to study phytoplankton physiology and working with other components of the LTER (such as ecologists studying microbes and zooplankton), we are also trying to develop a clear picture of the fate of phytoplankton biomass once it enters the Antarctic ecosystem. Whether this phytoplankton biomass is recycled by bacteria, grazed by krill, or merely settles to the sea floor has significant consequences for not only the Antarctic food web, but also for global biogeochemistry and our understanding of climate change dynamics.

For more information on the LTER phytoplankton research, see:


Meet the Adélie Penguins

Dear all,

We spent today (January 3) filming Donna Fraser and her team tagging Adélie penguins (Pygoscelis adeliae) on Humble Island, a small island off of Palmer station. This population of Antarctic penguins is rapidly declining due to retreating sea ice. They are dependent on the sea ice, and the accompanying krill, for their survival. The penguins had many chicks that they were shading from the hot sun.  Here are three photos taken from the film footage.

Scientist Donna Fraser with the Adélie penguins on Humble Island (Photo: Dena Seidel)


Adélie penguin research involves measurements such as this one. Humble Island, January 2013. (Photo: Dena Seidel)


Penguin Hill on Humble Island, January 2013. (Photo: Dena Seidel)


We are now at Palmer station until Saturday morning when we begin the month long science cruise. This is all quite amazing and our students will learn a great deal from working this project.

Dena Seidel

For more on information on Adélie penguins (for a general audience including kids) see:


For penguin and conservation enthusiasts, see: