2013 Helsinki, Finland
The 7th meeting of the Isotopes in Biogenic Silica Working Group was held 3-5 June 2013 and hosted by the BiSSSe research group at the Department of Food and Environmental Sciences at the University of Helsinki, Finland.
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Meeting Programme
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Day 1 June 3 2013
Helsinki University Museum (Arppeanum), Snellmaninkatu 3, Auditorium (2nd floor)
12:30 - 13:00 Coffee & Registration
13:00 - 13:30 Opening & Practical info
Session 1: Si and isotopes
13:30 -14:30 Philip Barker, Lancaster University, UK & Melanie Lang, British Geological Survey, UK
Silicon and isotopes for dummies" -introduction and state-of-the-art​
14.30 - 15.00 Coffee​
15:00 - 15:20 Floor Vandevenne, Antwerp University, Belgium
The terrestial silica puzzle: new input from δ30Si signatures in soil pore water
15:20 - 15:40 Megan Webb, Lancaster University, UK
Environmental Controls of the Carbon isotope Value of Freshwater Diatom Silica
15:40 - 16:00 David Ryves, Loughborough University, UK
Critically testing the role of δ30Si as a novel productivity signal and δ18O as an indicator of climate variability in temperate lakes
16:00 - 17:00 Poster & Beer in Keisarinsali (Emperor's Room), 4th floor
19:00 - 24:00 Sauna & Snacks at Poliisien maja, Lauttasaari
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Day 2 June 4 2013
Helsinki University Museum (Arppeanum), Snellmaninkatu 3, Auditorium (2nd floor)
9:30 - 10:00 Coffee
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Session 1: Si and isotopes (cont.)
10:00 - 10:20 Ivia Closset, LOCEAN - Universite Pierre et Marie Curie, France
Seasonal variation, origin and fate of settling diatoms in the Southern Ocean tracked by silicon isotope record in deep sediment traps
10:20 - 10:40 Paul Reyerson, University of Wisconsin-Madison, USA
Radiocarbon and δ13C measurements of extracted phytoliths from living grasses - where are we now?
10:40 - 11:00 Claudia Ehlert, University of Oldenburg, Germany
Stable silicon isotopes in sedimentary porewaters - dissolution versus authigenic clay mineral formation processes
11:00 - 11:20 Manuel Maldonado, Center for Advanced Studies of Blanes, Spain
Molecular and cytological mechanisms involved in the making of silica sponge spicules and implications for Si isotope fractionation
11.20 - 13.10 Lunch
Session 2: Biochemical cycling of Si
13:10 - 14:10 Eric Struyf, Antwerp University, Belgium
"Silicon biogeochemical cycling for dummies" - introduction and state-of-the-art
14:10 - 14:30 Lucia Barao, Antwerp University, Belgium
Pedogenic and biogenic amorphous Si distribution along a temperate land use gradient
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14.30 - 15.00 Coffee
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15:00 - 15:20 Jouni Lehtoranta, Finnish Environment Institute, Finland
Do mineralization pathways affect dissolution of silica?
15:20 - 15:40 Ivia Closset, LOCEAN - Universite Pierre et Marie Curie, France
Comparison of Si biogeochemical budget in contrasted Southern Ocean regions through silica production-dissolution measurements (KEOPS-2)
15:40 - 16:00 Aldo Shemesh, The Weizmann Institute of Science, Israel
Holocene climatic and environmental variability along East Antarctic coastal regions
18:00 - 19:30 Walk in Suomenlinna Forteress Island
19:30 - ... Dinner at Restaurant in Suomenlinna
Day 3 June 5 2013
Helsinki University Museum (Arppeanum), Snellmaninkatu 3, Auditorium (2nd floor)
9:30 - 10:00 Coffee
Session 2: Biochemical cycling of Si (cont.)
10:00 - 10:20 Maria Lehtimäki, University of Helsinki, Finland
The role of microbes in dissolution of biogenic silica in oxic and hypoxic seawater
10:20 - 10:40 Wim Clymans, University of Lund, Sweden
Silica extraction from tephra during amorphous silica determination
10:40 - 11:00 Paul Reyerson, University of Wisconsin-Madison, USA
Reactive silica in loess-derived soils of central North America
11.00 - 11.20 Break
11:20 - 11:40 Adrian Smiis, University of Tromsø, Norway
Herbivore-induced vegetation changes silicify the Si:N:P-stoichiometry of subarctic riparian ecosys
11:40 - 12:00 Keotshephile Mosimane, University of Botswana, Botswana
Biogenic Silica in tropical freshwater wetland soils and sediments: The Okavango delta, Botswana
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12:00 - Close & next meeting