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Pages and Posts Tagged ‘diatoms’


Video Tour of the JR

ABOARD THE JOIDES RESOLUTION, ON THE BERING SEA-- Drilling is going very smoothly on site U1343. We are almost done with hole C at this site. If things continue... {Read More »}



Experiments with Phytoplankton Growing Close to Icebergs

ABOARD THE RVIB N. B. PALMER, ON THE SOUTHERN OCEAN– We are experimenting with iron additions to phytoplankton populations to see possible effects of icebergs as a source of iron... {Read More »}



A Trip to the Ice Edge

ABOARD THE RVIB N. B. PALMER, ON THE SOUTHERN OCEAN– After a four day trek looking for other icebergs we might want to study, we came back to continue studying iceberg C18A... {Read More »}



Reproduction in Antarctic Diatoms

ABOARD THE RVIB N. B. PALMER, ON THE SOUTHERN OCEAN– As most unicellular phytoplankton algae, diatoms usually reproduce by division. One cell becomes two after mitosis; the two new algae are called “daughter cells”. Once in a long while diatoms go through sexual reproduction. What brings this phenomenon? {Read More »}



Diatoms Can Be Toxic

ABOARD THE RVIB N. B. PALMER, ON THE SOUTHERN OCEAN– Phytoplankton cells can become toxic under certain conditions. Still a mystery to scientists why they produce toxins, there has been a proliferation of large concentrations of toxic cells, or blooms, also called red tides, during the last 20 years... {Read More »}



Our First Iceberg

ABOARD THE RVIB N. B. PALMER, ON THE SOUTHERN OCEAN-- C18A is a large iceberg, rectangular, shaped almost like a surf board, 18 km long and 6 km wide. It takes us about 4 hours at 11 knots to navigate around it... {Read More »}



All Kinds of Diatoms

ABOARD THE RVIB N. B. PALMER, ON THE SOUTHERN OCEAN-- After 4 days in transit we arrived at Clarence Island near the South Shetlands. It is too windy to test our new instruments here. So we turn northeast and after 8 more hours we arrive at the C18A iceberg... {Read More »}



Adios Punta Arenas

ABOARD THE RVIB N. B. PALMER, ON THE SOUTHERN OCEAN-- Adios Punta Arenas, Chile. Hello Research Vessel and Ice Breaker, Nathaniel B. Palmer. We, the crew, support staff and scientists of the NBP Iceberg Cruise III, left port in Punta Arenas on March 6th to begin our 40-day cruise... {Read More »}



Macronutrients Around the Iceberg

ICEBERG A43K, SOUTHERN OCEAN-- Phytoplankton need dissolved nutrients, such as silicate, phosphate, and nitrate to grow in seawater. Open waters in Antarctica are rich in those nutrients, particularly in winter when plant growth is limited… {Read More »}



Floating Communities

SOUTHERN OCEAN-- The main research pursuit behind our group of scientists' travel aboard the N.B. Palmer this month is to see how icebergs influence surrounding organisms. This influence could come directly to the organisms themselves… {Read More »}