scholarly journals Activity of heterotrophic bacteria and its coupling to primary production during the spring phytoplankton bloom in the southern bight of the North Sea

1984 ◽  
Vol 29 (4) ◽  
pp. 721-730 ◽  
Author(s):  
Christiane Lancelot ◽  
Gilles Billen
Keyword(s):  
Primary Production ◽  
North Sea ◽  
Heterotrophic Bacteria ◽  
Phytoplankton Bloom ◽  
Spring Phytoplankton Bloom ◽  
Southern Bight ◽  
The North ◽  
The North Sea

scholarly journals High-throughput cultivation of heterotrophic bacteria during a spring phytoplankton bloom in the North Sea

2020 ◽  
Vol 43 (2) ◽  
pp. 126066
Author(s):  
Carlota Alejandre-Colomo ◽  
Jens Harder ◽  
Bernhard M. Fuchs ◽  
Ramon Rosselló-Móra ◽  
Rudolf Amann
Keyword(s):  
North Sea ◽  
High Throughput ◽  
Heterotrophic Bacteria ◽  
Phytoplankton Bloom ◽  
Spring Phytoplankton Bloom ◽  
The North ◽  
The North Sea

Dilution cultivation of marine heterotrophic bacteria abundant after a spring phytoplankton bloom in the North Sea

2014 ◽  
Vol 17 (10) ◽  
pp. 3515-3526 ◽  
Author(s):  
Richard L. Hahnke ◽  
Christin M. Bennke ◽  
Bernhard M. Fuchs ◽  
Alexander J. Mann ◽  
Erhard Rhiel ◽  
...  
Keyword(s):  
North Sea ◽  
Heterotrophic Bacteria ◽  
Phytoplankton Bloom ◽  
Spring Phytoplankton Bloom ◽  
The North ◽  
Marine Heterotrophic Bacteria ◽  
The North Sea

Eutrophication of Dutch coastal waters

1975 ◽  
Vol 189 (1096) ◽  
pp. 359-374 ◽  
Keyword(s):  
Primary Production ◽  
North Sea ◽  
Nutrient Ratios ◽  
River Rhine ◽  
Narrow Strip ◽  
Southern Bight ◽  
The North ◽  
Rate Of Increase ◽  
The North Sea ◽  
Very High

The concentrations of phosphorus and nitrogen compounds in the river Rhine have increased by a factor of about 7 since 1932; in recent years the rate of increase for P has been higher than for N. The concentration of reactive silicate, which is low in summer, has remained essentially constant. Because in the Southern Bight of the North Sea the contribution of nutrients from the deep oceanic reservoir is minor, these increases in riverborne nutrients have had a marked influence on nutrient values and nutrient ratios of the whole area, but especially so on the narrow strip of water along the Dutch Coast, which has an average salinity of 30%ₒ. These changes have caused silicon to be the first depleted nutrient element, limiting diatom blooms. It is shown that the spring bloom of Phaeocystis poucheti is occasionally able to consume all phosphorus, leaving some nitrogen. However, on the average the phosphorus and nitrogen left over by diatoms after all reactive silicate has been depleted is not consumed by other phytoplankton species. In the strip of 30%ₒ salinity water along the coast daily primary production may be up to 3500 mg carbon/m 2 , but yearly primary production is not very high. The vegetative season lasts only about 6 months, due to the influence of turbidity, and is characterized by a succession of periods with high and low productivity. This instability in the phytoplankton regime sometimes causes very high phytoplankton crops and at other times advection and diffusion of unused nutrient loads from the rivers to other parts of the North Sea.

Dynamic patterns of dissolved nitrogen in the Southern Bight of the North Sea

1984 ◽  
Vol 18 (5) ◽  
pp. 499-510 ◽  
Author(s):  
Willy Baeyens ◽  
Jean-Paul Mommaerts ◽  
Leo Goeyens ◽  
Frank Dehairs ◽  
Hugues Dedeurwaerder ◽  
...  
Keyword(s):  
North Sea ◽  
Southern Bight ◽  
Dissolved Nitrogen ◽  
The North ◽  
The North Sea ◽  
Dynamic Patterns

Fluxes and Sources of Heavy Metal Inputs into the Southern Bight of the North Sea

1992 ◽  
pp. 185-193
Author(s):  
R. Van Grieken ◽  
J. Injuk ◽  
P. Otten ◽  
C. Rojas ◽  
H. Van Malderen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
North Sea ◽  
Southern Bight ◽  
The North ◽  
The North Sea

The contribution of the deep chlorophyll maximum to primary production in a seasonally stratified shelf sea, the North Sea

2013 ◽  
Vol 113 (1-3) ◽  
pp. 153-166 ◽  
Author(s):  
Liam Fernand ◽  
Keith Weston ◽  
Tom Morris ◽  
Naomi Greenwood ◽  
Juan Brown ◽  
...  
Keyword(s):  
Primary Production ◽  
North Sea ◽  
Deep Chlorophyll Maximum ◽  
Chlorophyll Maximum ◽  
The North ◽  
Shelf Sea ◽  
The North Sea

scholarly journals Highly diverse flavobacterial phages isolated from North Sea spring blooms

2021 ◽  
Author(s):  
Nina Bartlau ◽  
Antje Wichels ◽  
Georg Krohne ◽  
Evelien M. Adriaenssens ◽  
Anneke Heins ◽  
...  
Keyword(s):  
North Sea ◽  
Heterotrophic Bacteria ◽  
Genomic Analysis ◽  
Mortality Factor ◽  
Phytoplankton Blooms ◽  
Life Styles ◽  
The North ◽  
Host Habitat ◽  
The North Sea ◽  
Respective Host

AbstractIt is generally recognized that phages are a mortality factor for their bacterial hosts. This could be particularly true in spring phytoplankton blooms, which are known to be closely followed by a highly specialized bacterial community. We hypothesized that phages modulate these dense heterotrophic bacteria successions following phytoplankton blooms. In this study, we focused on Flavobacteriia, because they are main responders during these blooms and have an important role in the degradation of polysaccharides. A cultivation-based approach was used, obtaining 44 lytic flavobacterial phages (flavophages), representing twelve new species from two viral realms. Taxonomic analysis allowed us to delineate ten new phage genera and ten new families, from which nine and four, respectively, had no previously cultivated representatives. Genomic analysis predicted various life styles and genomic replication strategies. A likely eukaryote-associated host habitat was reflected in the gene content of some of the flavophages. Detection in cellular metagenomes and by direct-plating showed that part of these phages were actively replicating in the environment during the 2018 spring bloom. Furthermore, CRISPR/Cas spacers and re-isolation during two consecutive years suggested that, at least part of the new flavophages are stable components of the microbial community in the North Sea. Together, our results indicate that these diverse flavophages have the potential to modulate their respective host populations.

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