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Orca whale swimming by a large ice mass in the Southern Ocean.

Orca whale swimming by a large ice mass in the Southern Ocean.
Orca whale swimming by a large ice mass in the Southern Ocean.
Orca whale swimming by a large ice mass in the Southern Ocean.
Orca whale swimming by a large ice mass in the Southern Ocean.
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Bundy, Randelle
Orca whale swimming by a large ice mass in the Southern Ocean.
Still Image
09/29/2016
graphics-R_Bundy-P9290150_crop.jpg
Southern Ocean cruise, around the western Antarctic Peninsula. The cruise was on board the R/V/I/B Nathaniel B. Palmer, Cruise ID: NBP1608, Chief Scientist: Bethany Jenkins from the University of Rhode Island.
The overall goal of the cruise was to explore iron limitation to Southern Ocean diatom communities. I was on the cruise to specifically look at particular organic molecules that we hypothesize are produced by the bacteria associated with diatoms in order to help alleviate iron limitation (these molecules are called siderophores). It was a collaborative cruise with many biologists and chemists looking at iron cycling in the Southern Ocean, and as a postdoc I was representing Dan Repeta's lab on the cruise.
Image Of the Day caption:
Tomorrow is World Whale Day. WHOI post-doctoral researcher Randelle Bundy took this photo of an orca during a cruise off the coast of Antarctica to look at something on the other end of the size scalediatomsthat, despite their size are an important part of the Southern Ocean ecosystem. Bundy was on the ship as part of her work to understand the relationship between diatoms and bacteria. These bacteria produce a group of organic molecules that Bundy and others think might help diatoms obtain the iron they need to live and, ultimately, to support a food web that includes whales.
Photo by Randelle Bundy
© Woods Hole Oceanographic Institution
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