Margalef Lecture Series
Within the Margalef Lecture Series, Farooq Azam from the Scripps Institution of Oceanography , USA will give a lecture on:
"Microbial structuring of the marine carbon cycle"
Farooq is world-renowed for his work introducing the microbial loop concept to microbial ecology.
Monday 30 Sept 2013; 14:00; UZA 1; Lecture Hall 2
By Gerhard J. Herndl and Thomas Reinthaler
Herndl, G. J., and T. Reinthaler. 2013. Microbial control of the dark end of the biological pump. Nature Geoscience 6: 718–724, doi:10.1038/ngeo1921
A fraction of the carbon captured by phytoplankton in the sunlit surface ocean sinks to depth as dead organic matter and faecal material. The microbial breakdown of this material in the subsurface ocean generates carbon dioxide. Collectively, this microbially mediated flux of carbon from the atmosphere to the ocean interior is termed the biological pump. In recent decades it has become clear that the composition of the phytoplankton community in the surface ocean largely determines the quantity and quality of organic matter that sinks to depth. This settling organic matter, however, is not sufficient to meet the energy demands of microbes in the dark ocean. Two additional sources of organic matter have been identified: non-sinking organic particles of debated origin that escape capture by sediment traps and exhibit stable concentrations throughout the dark ocean, and microbes that convert inorganic carbon into organic matter. Whether these two sources can together account for the significant mismatch between organic matter consumption and supply in the dark ocean remains to be seen. It is clear, however, that the microbial community of the deep ocean works in a fundamentally different way from surface water communities.
| 29.08.2013 | read more |
By Monika Bright, Julia Klose, Andrea D. Nussbaumer, Bright M., Klose J., Nussbaumer A.D.
2013 Giant tubeworms. Current Biology Vol 23 No 6 R224
In 1977, a joint French and U.S. expedition to the Galapagos Rift led to the discovery of hydrothermal vents. Among the unexpected animal communities found down there was an extremely large polychaete worm, Riftia pachyptila. Shortly thereafter, the giant tubeworm was described as the first symbiosis between an animal and sulfur-oxidizing chemoautotrophic (thiotrophic) bacteria. The current review summarises the host symbiont relation as well as the transmission mode and symbiont population control. Both, the difference between vent and seep tubeworms and the tubeworms relatives are described.
| 21.03.2013 |
Let's talk about symbiosis
The Research Focus Symbiosis of the Faculty of Life Sciences will be holding a joint workshop for all students and researchers to get together on April 26, 2013.
Please contact Jean Marie Volland (email@example.com) or Pedro Rodrigues Frade firstname.lastname@example.org) if you are interested to attend.
Deadline for registration and submission of abstracts is April 10, 2013.
| 21.03.2013 |
Single cell genomics: Sorting out patterns in the microbial jungle
Ramunas Stepanauskas is the director of the Single Cell Genomics Center (SCGC) at the Bigelow Laboratory for Ocean Sciences, USA. He will give a lecture on "Single cell genomics: Sorting out patterns in the microbial jungle".
Monday, 18 March 2013; 13:00-14:00 hours; UZA2, Lecture Hall 4
| 13.03.2013 |