[ASC-media] Free ECU Natural Sciences Seminar Series

Nardia BORDAS n.bordas at ecu.edu.au
Thu Mar 1 07:37:23 CET 2012

Greetings all!  The free Seminar Series in ECU's School of Natural Sciences for 2012 is about to begin, with Dr. Oscar Serrano presenting his research into seagrass meadow soils this Friday afternoon.  This week's details are listed below as an example, though we will have a wide variety of speakers and topics.  These are not "dumbed down" talks, they are real findings from the studies conducted by researchers from ECU and other organizations from Australia and overseas.
This year the seminars will be a regular event, 3-4pm each Friday during teaching weeks.  Seminars will be followed by refreshments and a chance to network, so it's a great opportunity to meet our scientists and discuss what we do.
If you'd like to be notified of upcoming seminars, or other Natural Science events at ECU, e-mail me at n.bordas at ecu.edu.au<mailto:n.bordas at ecu.edu.au> to join the bcc list.
In science,
Nardia Bordas
Promotions Officer (part-time)
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

Dr Oscar Serrano
Friday 2nd March 3pm
Building 19 (Room 19.141) Joondalup

Title: Insights in the mat of Posidonia oceanica: Biogeochemical sink and paleoecological record

Abstract: The study of a 475 cm core (spanning 4316 y BP) sampled in a Posidonia oceanica meadow (NW Mediterranean) allowed us to make the first detailed description of the soil below this endemic seagrass (often referred to as mat, and tentatively classified as a Limnic Subaquatic Histosol). The radiocarbon dating revealed a highly consistent temporal accumulation with an average resolution of 8 y cm-1. The total organic matter content observed is the highest recorded for seagrasses so far. Direct quantification (i.e. not based on accumulation models) confirmed a very high Carbon content (Corganic and Ccarbonates), as well as small-sized sediment fractions. The study of the core also has provided a record of changes in heavy metal abundances (Fe, Mn, Ni, Cr, Cu, Pb, Cd, Zn, As, Al and Hg) over the Later Holocene. The results obtained provide sound additional proof of P. oceanica as a sink of C and fine-grained sediments, and as a long-term record of trends in pollutant abundance in the marine coastal environment, as well as its unique role in the Mediterranean as a long-term metal sink.

Refreshments in SONS staff room, Bdg 19 following.
All welcome.

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