Investigations of Submerged Palaeoshorelines in the Kiel Fjord

2017 ◽  
pp. 155-163
Author(s):  
Frederick Feulner
Keyword(s):  
Kiel Fjord

scholarly journals Combined genotyping, microbial diversity and metabolite profiling studies on farmed Mytilus spp. from Kiel Fjord

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Caroline Utermann ◽  
Delphine Parrot ◽  
Corinna Breusing ◽  
Heiko Stuckas ◽  
Tim Staufenberger ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Metabolite Profiling ◽  
Kiel Fjord

scholarly journals The effect of the salinity, light regime and food source on carbon and nitrogen uptake in a benthic foraminifer

2021 ◽  
Vol 18 (4) ◽  
pp. 1395-1406
Author(s):  
Michael Lintner ◽  
Bianca Lintner ◽  
Wolfgang Wanek ◽  
Nina Keul ◽  
Petra Heinz
Keyword(s):  
Green Algae ◽  
Nitrogen Uptake ◽  
Food Source ◽  
N Uptake ◽  
Negative Influence ◽  
Light Regime ◽  
Continuous Darkness ◽  
Kiel Fjord ◽  
Food Uptake ◽  
C And N

Abstract. Foraminifera are unicellular organisms that play an important role in marine organic matter cycles. Some species are able to isolate chloroplasts from their algal food source and incorporate them as kleptoplasts into their own metabolic pathways, a phenomenon known as kleptoplastidy. One species showing this ability is Elphidium excavatum, a common foraminifer in the Kiel Fjord, Germany. The Kiel Fjord is fed by several rivers and thus forms a habitat with strongly fluctuating salinity. Here, we tested the effects of the food source, salinity and light regime on the food uptake (via 15N and 13C algal uptake) in this kleptoplast-bearing foraminifer. In our study E. excavatum was cultured in the lab at three salinity levels (15, 20 and 25) and uptake of C and N from the food source Dunaliella tertiolecta (Chlorophyceae) and Leyanella arenaria (Bacillariophyceae) were measured over time (after 3, 5 and 7 d). The species was very well adapted to the current salinity of the sampling region, as both algal N and C uptake was highest at a salinity of 20. It seems that E. excavatum coped better with lower than with higher salinities. The amount of absorbed C from the green algae D. tertiolecta showed a tendency effect of salinity, peaking at a salinity of 20. Nitrogen uptake was also highest at a salinity of 20 and steadily increased with time. In contrast, C uptake from the diatom L. arenaria was highest at a salinity of 15 and decreased at higher salinities. We found no overall significant differences in C and N uptake from green algae vs. diatoms. Furthermore, the food uptake at a light–dark rhythm of 16:8 h was compared to continuous darkness. Darkness had a negative influence on algal C and N uptake, and this effect increased with incubation time. Starving experiments showed a stimulation of food uptake after 7 d. In summary, it can be concluded that E. excavatum copes well with changes of salinity to a lower level. For changes in light regime, we showed that light reduction caused a decrease of C and N uptake by E. excavatum.

Ferry Service Network Design for Kiel fjord

2020 ◽  
pp. 36-51
Author(s):  
Ingvild Eide Aslaksen ◽  
Elisabeth Svanberg ◽  
Kjetil Fagerholt ◽  
Lennart Christian Johnsen ◽  
Frank Meisel
Keyword(s):  
Network Design ◽  
Service Network ◽  
Service Network Design ◽  
Kiel Fjord

The impact of a mussel farm on water transparency in the Kiel Fjord

2014 ◽  
Vol 101 ◽  
pp. 42-52 ◽  
Author(s):  
Toni Schröder ◽  
Jana Stank ◽  
Gerald Schernewski ◽  
Peter Krost
Keyword(s):  
Water Transparency ◽  
Kiel Fjord ◽  
The Impact ◽  
Mussel Farm
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