BIOSED – Comparing two "worlds" of sand


Coordination: Miriam Weber, Christian Lott

Coarse to medium fine nearshore sandy seafloor is characterized by a good seep through of their pore volume, the aligned filtering properties for organic material cause a rich settlement by microorganisms and Meiofauna. The leading factors of the settlement and especially the differences between sands of diverse mineral composition are not yet understood and merely studied.

The direct vicinity of the Islands of Elba and Pianosa with different native rocks for sediment formation, here granite, there miocene and pliocene biogenic sedimental rocks, is the ideal predisposition for comparative studies. Since long Olav Giere, professor for zoology at the university of Hamburg and expert for sand meiofauna, had the idea of a interdisciplinary comparison of these two "worlds" of sand. After preliminary studies, revealing immediately some scientifically unknown species, the BIOSED project was initiated and established with diverse partners at the HYDRA institute.

Works on meiofauna with the emphasis on copepods (Andrea Werner) fauna of polychaetes (Stella Nemecky und Duygu Sevilgen) fauna of foraminifera (Alexander Lemmertz, Uni Freiburg/Uni Bonn) und Ostracoda (Christian Joachim, Uni Bonn) and studies of the biogeochemistry (Christian Lott, Miriam Weber) are actually running or were finished lately.

Questions of benthic primary production, its interaction with the sediment and mineralization where the emphasis of two works accomplished by Stella Nemecky and Duygu Sevilgen 2007 and 2008 at the University of  Bremen and at Max-Planck-Institute for Marine Microbiology. Their aim was to improve the understanding of the carbon cycle within both types of sediments.

In spring 2010 the international interdisciplinary BIOSAND 2010 ELBA workshop took place.



Fotos: Olav Giere



Prof. Dr. Olav Giere (University of Hamburg): Meiofauna
Dr. Dirk de Beer, Dr. Lubos Polerecky (MPI Bremen): Biogeochemistry / Microsensors
PD Dr. Tom Brey (AWI Bremerhaven): Benthic ecology
Prof. Dr. Pedro Martinez-Arbizu (DZMB Wilhelmshaven): Copepods
Prof. Dr. Martin Langer (University of Bonn): Foraminifera, Micro-paleonthology
Prof. Dr. Antonio Todaro (University of Modena): Gastrotrichs
Prof. Dr. Kai Bischof (University of Bremen): Microphytobenthos
Dr. Michael Schrödl (Bavarian State Collection of Zoology): Acochlida



Giere O, Arlt G, Thiermann F, Frenzel P, Todaro M A (2004):
Siliceous and calcareous sands – different worlds for meiofauna?
Proc. XII International Meiofauna Conference, 11/16 July, Ravenna, Italy

Todaro M A, Rossaro S, Dal Zotto M, Giere O (2004)
Marine gastrotrichs from west-Mediterranean calcareous sediments
Proc. XII International Meiofauna Conference, 11/16 July, Ravenna, Italy

Kapp H & Giere O (2005):
Spadella interstitialis sp. nov., a meiobenthic chaetognath from Mediterranean calcareous sands
Meiofauna Marina 14:109-114

Goldbeck E, Houben C & Langer M R (2005):
Survival of foraminifera in the gut of holothuroids from Elba Island (Mediterranean Sea)
Revue de micropaléontologie 48:169-174

Langer M R & Schmidt-Sinns J (2006): The 100 most common Foraminifera from the Bay of Fetovaia, Elba Island
Universität Bonn, p. 37, pl. 15

Lott C, Weber M, Bergin C, de Beer D, Dubilier N (2006):
Habitat conditions of a Mediterranean gutless oligochaete and the implications for the multiple bacteria-worm symbiosis
5th ISS congress, Vienna, 04 –10 August 2006
(poster presentation) contribution #1 HYDRA-BIOSED

Werner A (2006):
Vergleich von Abundanzen und Tiefenverteilung der Meiofauna, im Speziellen der Harpactoida (Copepoda, Crustacea), in sublitoralen Kalk- und Quarzsedimenten (Mittelmeer)
Diplomarbeit, Uni Oldenburg contribution #2 HYDRA-BIOSED

Sevilgen D S, Nemecky S, Lott C & Brey T (2007):
Species composition and vertical distribution of infaunal polychaetes in carbonate and silicate sands of the Tyrrhenian Sea (NW Mediterranean)
Posterpräsentation, Universität Bremen
contribution #3 HYDRA-BIOSED

Nemecky S & Sevilgen D S (2007):
Species composition and vertical distribution of infaunal polychaetes in carbonate and silicate sands of the Tyrrhenian Sea (NW Mediterranean)
Student Research Project (Arbeitsvorhaben), Universität Bremen
contribution #4 HYDRA-BIOSED

Weber M, Färber P, Meyer V, Lott C, Eickert G, Fabricius K E & DeBeer D (2007):
In situ applications of a new diver-operated motorized microsensor profiler
Environmental Science and Technology, 41 (17): 6210-6215

Langner S, Martinez Arbizu P & Lott C (in prep.)
Pseudocyclops psammicus sp. n. (Copepoda: Calanoida), a new sand dwelling calanoid copepod from Pianosa (Tuscan Archipelago, Italy)
contribution #5 HYDRA-BIOSED

Sevilgen D S (2008):
Comparative study on benthic primary production in carbonate and silicate sands of the Islands of Elba and PianosaTyrrhenian Sea (NW Mediterranean)
Diplomarbeit, Universität Bremen
contribution #6 HYDRA-BIOSED

Nemecky S (2008):
Benthic degradation rates in shallow subtidal carbonate and silicate sands
Diplomarbeit, Universität Bremen
contribution #7 HYDRA-BIOSED