Compensation for Nitrogen and Phosphorous Release from Baltic Mariculture by Nodularia spumigena Harvest During Summer Blooms - A Possible Path towards Sustainable Aquaculture

Compensation for Nitrogen and Phosphorous Release from Baltic Mariculture by Nodularia spumigena Harvest During Summer Blooms - A Possible Path towards Sustainable Aquaculture

Cyanobacteria blooms in the Gulf of Finland triggered by saltwater inflow into the Baltic Sea

In the 1980s and 1990s prior to 1995, massive blooms of the diazotrophic cyanobacterium Nodularia spumigena occurred in the Baltic Sea Proper but never extended into the central and eastern Gulf of Finland. The absence of nitrogen-fixing cyanobacteria blooms in parts of the Baltic Sea with a high N:P ratio (e.g. Gulf of Finland) has been explained by their reduced competitive advantage in condi...

Filamentous cyanobacteria in the Baltic Sea – spatiotemporal patterns and nitrogen fixation

Summer blooms of filamentous, diazotrophic cyanobacteria are typical of the Baltic Sea Proper, and are dominated by Aphanizomenon sp. and the toxic Nodularia spumigena. Although occurring every summer, the blooms vary greatly in timing and spatial distribution, making monitoring difficult and imprecise. This thesis studies how the spatial variability of Baltic cyanobacterial blooms influences e...

Growth, nitrogen fixation, and nodularin production by two baltic sea cyanobacteria.

In late summer, nitrogen-fixing cyanobacteria Nodularia spumigena and Aphanizomenon flos-aquae form blooms in the open Baltic Sea. N. spumigena has caused several animal poisonings, but Baltic A. flos-aquae is not known to be toxic. In this laboratory study, performed with batch cultures, the influences of environmental conditions on the biomass and nitrogen fixation rate of N. spumigena and A....

Stimulation of nitrogen-fixing cyanobacteria in a Baltic Sea plankton community by land-derived organic matter or iron addition

In the Baltic Sea, floating blooms of nitrogen-fixing cyanobacteria occur yearly during late summer. These blooms can sometimes be limited by iron. Due to extensive foresting around the Baltic Sea, iron is entering the Baltic Sea partly bound to dissolved organic material (DOM) via rivers. An experiment was performed in 300 l laboratory mesocosms to test the hypothesis that riverine highmolecul...