On Friday the 24th of May, Alexander Lubsch will defend his thesis 'North Sea seaweeds: DIP and DIN uptake kinetics and management strategies'.
Nutrient uptake kinetics and ecophysiological consequences in 4 North Sea seaweeds
Nutrient uptake kinetics and internal storage capacities of dissolved inorganic phosphate (DIP) and dissolved inorganic nitrate (DIN) were quantified for 4 North Sea seaweed species, Ulva lactuca, Saccharina latissima, Laminaria digitata, Palmaria palmata. All seaweed species tested showed a biphasic response in uptake rates: surge uptake as a response to nutrient-starvation and maintenance uptake after internal nutrient pools had been filled. In absolute numbers, all seaweed species had different uptake rates and internal storage capacities for DIP and DIN. These differences were translated into different physiological consequences, from growth characteristics to internal composition related to DIP and DIN availability. Some species were well equipped to withstand low periods of nutrient limitation, some were very efficient in DIP and DIN uptake.
For the first time ever, a comprehensive insight was achieved in DIP and DIN uptake kinetics, management strategies and physiological effects in these North Sea seaweed species. With this insight ecological effects of nutrient limitations and shifts in limitation can be estimated. And ecological importance of seaweeds in terms of ecosystem services (e.g. DIP/DIN cycling) demonstrated. The results also allow prediction of potential seaweed biomass production in (off-shore) cultivation.
This thesis furthermore provides novel concepts for standardized texture analysis on the seaweeds, enabling research into the effects of environmental conditions on the tissue toughness of seaweeds. Finally, an optical analysis to estimate protein concentration in U. lactuca is introduced, which resulted in the EyeOnUlva smartphone app.
There is plenty of work, and yet people with a disability are still often sidelined. One plus one is two, or so you’d think: this is the perfect time to help this group of workers find a job. The intention is there, also within the University, but...
The Dutch science funding agency NWO recently awarded a large research project into new concepts for energy-efficient information technology of no less than ten million euros
On the recommendation of the Board of the University of Groningen, Dr Frans J. Sijtsma has been appointed as academic director of the Rudolf Agricola School for Sustainable Development with effect from 1 February 2023. This concerns a 0.5 FTE...
The UG website uses functional and anonymous analytics cookies. Please answer the question of whether or not you want to accept other cookies (such as tracking cookies).
If no choice is made, only basic cookies will be stored. More information