Looking through glass: how dynamic microbial interactions drive silicon biogeochemistry

Date: 
Monday 22 July 2019 - 10:00 to 11:00
Location: 
Other venue (see below for details).
Other Venue: 
NOC - Southampton - Node room - 064/03
Speaker: 
Kim Thamatrakoln

Looking through glass: how dynamic microbial interactions drive silicon
biogeochemistry

Marine phytoplankton are responsible for nearly half the global
net primary production, with diatoms contributing up to 40%
of total marine productivity. As the largest group of siliceous
organisms in the ocean, diatoms form the primary link between the carbon
and silicon (Si) cycles, dominating the biological pump and driving the
sequestration of atmospheric carbon into the deep sea. With an obligate
requirement for Si for cell wall formation, the availability of
dissolved Si drives, to first order, global diatom distributions and
productivity. Using a combination of field- and laboratory-based
approaches, we have been exploring the role that viral infection of
diatoms plays in mediating Si availability and cycling through host
mortality and lysis. In this talk I will present findings that
contrasting nutrient regimes alter diatom host-virus dynamics in ways
that could significantly impact both silicon cycling and carbon
export.

Kim Thamatrakoln, Associate Research Professor, Rutgers University
Seminar category: 
POETS Corner