[ASC-media] ECU Natural Sciences Seminar March 30: microbes in polar lakes

Nardia BORDAS n.bordas at ecu.edu.au
Mon Mar 26 06:48:03 CEST 2012


Greetings, Science Fans!
You are invited to our next SoNS (School of Natural Sciences) seminar for 2012 at 3.30pm on Friday 30th March. Our newly appointed postdoctoral research fellow Dr Christin Sawstrom will discuss field studies in the Arctic and Antarctic investigating what happens to nutrients in polar lakes.

These are not "dumbed down" talks but real research presentations so content may be quite technical at times; nevertheless all interested members of the public are welcome to join us for the seminar plus drinks and nibbles afterwards, where you can chat with the researchers in person.
Places are strictly limited so RSVPs are essential.  To reserve your place, receive parking and venue details or to request further information, e-mail n.bordas at ecu.edu.au<mailto:n.bordas at ecu.edu.au> or leave a message on (08) 6304 5116.
If you'd like the maximum notice of upcoming seminars, reply to this e-mail asking to be put in contact with the series convenor.
In science,

Nardia Bordas
Promotions Officer
School of Natural Sciences, Edith Cowan University
Room JO19.242, 270 Joondalup Drive, Joondalup WA 6027
T +61 8 6304 5116, F +61 8 6304 5842
n.bordas at ecu.edu.au<mailto:n.bordas at ecu.edu.au>

SoNS Seminar Series, Friday March 30: Organic matter flow in microbial food webs
Dr Christin Säwström
Centre for Marine Ecosystems Research &
School of Natural Sciences, ECU
Organic matter flow in polar microbial food webs
Abstract
Bacteria are key components in aquatic ecosystems and they drive many important biogeochemical processes. In polarlakes, which are often oligotrophic, the microbial food web plays an intrinsic role in organic matter flow which is primarily mediated by bacteria. The assimilation of dissolved organic matter by bacteria can provide a link with higher trophic levels (DOM-bacteria-bacterivore pathway). Two field studiesconducted in the Antarctic and the Arctic Sweden will demonstrate how autochthonous carbon sources, including viral lysis, phytoplankton production and benthic algae, can provide important sources of dissolved organic matter to lake bacteria and also be transferred to higher trophic levels.

Refreshments following.  All welcome!

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