About My Science

In the open ocean, the majority of a food web is at the microscopic level, and plant nutrients are scarce.  Consider a cup of tea; the teabag contains particles, specific discrete objects. Phytoplankton cells are also particles.  The tea itself is made up of various compounds dissolved in water.  Likewise, some phytoplankton photosynthesis goes to particle growth (the teabag) and some becomes dissolved compounds (the tea).  We can certainly drink tea, but many ocean organisms can’t use dissolved material.  So the dissolved stuff produced by phytoplankton is available only to bacteria. How much of that is usually produced? 

In my work with the Hawaii Ocean Time-series, I try to measure how much dissolved material is produced by phytoplankton photosynthesis, what percent of the total photosynthetic production that is, and how fast the bacteria are growing.  I want to know if these production rates change seasonally, or with light, or with CO2 concentration, or with the amount of nutrients present.

When not thinking about community metabolism and carbon flow, I enjoy soccer, camping, hiking, running, cooking, looking at fish underwater, and falling off my surfboard.  

Contact information:
Donn A. Viviani   
C-More Hale 201
Oceanography Department
University of Hawai'i at Manoa
1950 East West Road
Honolulu, HI 96822 USA
Phone: (808) 956-0577

Operating the winch on the R/V Kilo Moana