scholarly journals Differential contribution of diatoms and dinoflagellates to phytoplankton biomass in the NE Atlantic Ocean and the North Sea

2006 ◽  
Vol 312 ◽  
pp. 57-65 ◽  
Author(s):  
SC Leterme ◽  
L Seuront ◽  
M Edwards
Keyword(s):  
Atlantic Ocean ◽  
North Sea ◽  
Phytoplankton Biomass ◽  
Ne Atlantic ◽  
The North ◽  
Ne Atlantic Ocean ◽  
The North Sea ◽  
Differential Contribution

scholarly journals The carbon budget of the North Sea

2005 ◽  
Vol 2 (1) ◽  
pp. 87-96 ◽  
Author(s):  
H. Thomas ◽  
Y. Bozec ◽  
H. J. W. de Baar ◽  
K. Elkalay ◽  
M. Frankignoulle ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Continental Shelf ◽  
North Sea ◽  
North Atlantic ◽  
Carbon Budget ◽  
North Atlantic Ocean ◽  
Carbon Sink ◽  
The North ◽  
The North Sea ◽  
The North Atlantic

Abstract. A carbon budget has been established for the North Sea, a shelf sea on the NW European continental shelf. The carbon exchange fluxes with the North Atlantic Ocean dominate the gross carbon budget. The net carbon budget – more relevant to the issue of the contribution of the coastal ocean to the marine carbon cycle – is dominated by the carbon inputs from rivers, the Baltic Sea and the atmosphere. The North Sea acts as a sink for organic carbon and thus can be characterised as a heterotrophic system. The dominant carbon sink is the final export to the North Atlantic Ocean. More than 90% of the CO2 taken up from the atmosphere is exported to the North Atlantic Ocean making the North Sea a highly efficient continental shelf pump for carbon.

Calcareous nannoplankton and the age of the Globigerina silts of the western approaches of the English Channel

1974 ◽  
Vol 111 (4) ◽  
pp. 303-306 ◽  
Author(s):  
E. Martini
Keyword(s):  
Atlantic Ocean ◽  
North Sea ◽  
English Channel ◽  
Calcareous Nannoplankton ◽  
Northern Germany ◽  
Lower Miocene ◽  
The North ◽  
The North Sea

SummaryCalcareous nannoplankton from the Globigerina silts of the western approaches of the English Channel indicate the presence of standard nannoplankton zones NN2, NN 4 and NN 5, part of which can be correlated with Neogene beds in Belgium and Northern Germany. The calcareous nannoplankton support the possibility of a connexion between the North Sea Basin and the Atlantic Ocean through the English Channel during part of the Lower Miocene.

scholarly journals A new balaenopterid species from the Southern North Sea Basin informs about phylogeny and taxonomy of Burtinopsis and Protororqualus (Cetacea, Mysticeti, Balaenopteridae)

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9570 ◽  
Author(s):  
Michelangelo Bisconti ◽  
Mark E.J. Bosselaers
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Atlantic Ocean ◽  
North Sea ◽  
North Atlantic Ocean ◽  
The Past ◽  
The North ◽  
The North Sea ◽  
Morphological Transformations ◽  
The 19Th Century

Background An extensive radiation can be inferred among balaenopterid mysticetes in the last 10 million years based on a rich fossil record. Many extinct genera and species have been established in the past by the study of fossil rorquals from northern and southern hemispheres. In many cases, the new fossils are used to create new genera. However, in very recent times, new species of known genera have been described that help our understanding of the speciation processes and the biogeography of these whales. Here, a new species of balaenopterid whales is described in order to better understand the past diversity of Balaenopteridae and to analyze its paleobiogeographical implications. As the new species closely resembles a taxon established in the 19th century (i.e., Burtinopsis), a detailed analysis of this taxon was necessary to support the new taxonomic statements of this article. Methods A new partial skeleton including skull and earbones is described and compared to an extended sample of living and fossil mysticete species. A phylogenetic analysis including 355 character states scored in 88 taxa was performed to understand its relationships within the genus Protororqualus, to allow paleobiogeographic inferences and to better understand the relationships of Protororqualus within Balaenopteridae. Maximum parsimony analyses of character evolution were performed to understand morphological transformations within Balaenopteridae. The revision of Burtinopsis was carried out based on detailed descriptions and comparisons of the type materials that were figured and measured. Results Protororqualus wilfriedneesi sp. nov. was established based on a comparative analysis of the skull and earbone morphology. The specimen is dated back to the Zanclean (Lower Pliocene, between c. 5.3 and 3.6 Ma). A taphonomical study of the holotype skeleton revealed evidence of interactions with sharks and fishes before the definitive burial of the carcass. Based on the phylogenetic analysis, the monophyly of the genus Protororqualus was confirmed. Protororqualus wilfriedneesi sp. nov. was more derived than Protororqualus cuvieri suggesting that it resulted from an invasion of the North Sea Basin (and the North Atlantic ocean) from the Mediterranean basin. Several specimens from western and eastern sides of the Atlantic Ocean are described that suggest that Protororqualus wilfriedneesi had a trans-Atlantic distribution in the Pliocene.

scholarly journals NEED Northern European Enclosure Dam

2021 ◽  
Vol 52 (2) ◽  
pp. 6-6
Author(s):  
Sjoerd Groeskamp ◽  
Joakim Kjellsson
Keyword(s):  
Atlantic Ocean ◽  
Sea Level Rise ◽  
Sea Level ◽  
North Sea ◽  
European Countries ◽  
English Channel ◽  
The North ◽  
Northern European ◽  
The North Sea

To protect fifteen northern European countries against sea level rise, a highly ambitious plan was put forward to build massive sea dams across the North Sea and the English Channel, which will cut off the North Sea from the rest of the Atlantic Ocean.

scholarly journals Evidence of a relationship between weight and total length of marine fish in the North-eastern Atlantic Ocean: physiological, spatial and temporal variations

2016 ◽  
Vol 98 (3) ◽  
pp. 617-625 ◽  
Author(s):  
Kélig Mahé ◽  
Elise Bellamy ◽  
Jean Paul Delpech ◽  
Coline Lazard ◽  
Michèle Salaun ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Sea ◽  
Temporal Variations ◽  
Bay Of Biscay ◽  
English Channel ◽  
Total Length ◽  
The North ◽  
Eastern Atlantic Ocean ◽  
North Eastern ◽  
The North Sea

Weight–Body Length relationships (WLR) of 45 fish species (37 Actinopterygii and eight Elasmobranchii) were investigated. A total of 31,167 individuals were caught and their biological parameters measured during the four quarters from 2013 to 2015, on five scientific surveys sampling the North-eastern Atlantic Ocean from the North Sea to the Bay of Biscay (ICES Divisions IVb, IVc, VIId, VIIe, VIIg, VIIh, VIIj, VIIIa and VIIIb). Among 45 tested species, all showed a significant correlation between total length (L) and total weight (W). The influence of sex on WLR was estimated for 39 species and presented a significant sexual dimorphism for 18 species. Condition factor (K) of females was always higher than for males. Moreover, a spatial effect on the WLR according to five ecoregions (the Bay of Biscay, the Celtic Sea, the Western English Channel, the Eastern English Channel and the North Sea), was significant for 18 species among 38 tested species. The temporal effect was tested according to components (year and quarter/season). The seasonality effect on WLR is more frequently significant than the year especially for the Elasmobranchii species, and can be related to the spawning season. Finally, depressiform species (skates, sharks and flatfish) are characterized by positive allometric growth, whereas there is no such clear pattern regarding roundfishes growth, whatever their body shape is.

Effects of environmental conditions on the seasonal distribution of phytoplankton biomass in the North Sea

2009 ◽  
Vol 54 (2) ◽  
pp. 512-524 ◽  
Author(s):  
M. Llope ◽  
K.-S. Chan ◽  
L. Ciannelli ◽  
P. C. Reid ◽  
L. C. Stige ◽  
...  
Keyword(s):  
North Sea ◽  
Environmental Conditions ◽  
Phytoplankton Biomass ◽  
Seasonal Distribution ◽  
The North ◽  
The North Sea
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