Benthic trophic networks of the southern North Sea: contrasting soft-sediment communities share high food web similarity

2019 ◽  
Vol 628 ◽  
pp. 17-36
Author(s):  
J Steger ◽  
H Pehlke ◽  
B Lebreton ◽  
T Brey ◽  
J Dannheim
Keyword(s):  
Food Web ◽  
North Sea ◽  
Soft Sediment ◽  
High Food ◽  
Southern North Sea ◽  
Trophic Networks

Combining efforts to make maximum sustainable yields and good environmental status match in a food-web model of the southern North Sea

2016 ◽  
Vol 331 ◽  
pp. 17-30 ◽  
Author(s):  
Moritz Stäbler ◽  
Alexander Kempf ◽  
Steven Mackinson ◽  
Jan Jaap Poos ◽  
Clement Garcia ◽  
...  
Keyword(s):  
Food Web ◽  
North Sea ◽  
Southern North Sea ◽  
Environmental Status ◽  
Good Environmental Status ◽  
Food Web Model

scholarly journals Impact of an artificial structure on the benthic community composition in the southern North Sea: assessed by a morphological and molecular approach

2018 ◽  
Vol 77 (3) ◽  
pp. 1167-1177 ◽  
Author(s):  
Lise Klunder ◽  
Marc S S Lavaleye ◽  
Amalia Filippidi ◽  
Judith D L van Bleijswijk ◽  
Gert-Jan Reichart ◽  
...  
Keyword(s):  
Species Composition ◽  
North Sea ◽  
Benthic Community ◽  
Abiotic Factors ◽  
Organic Matter Content ◽  
Soft Sediment ◽  
Molecular Approach ◽  
Long Term Effects ◽  
Overlying Water ◽  
Southern North Sea

Abstract Man-made structures in the North Sea are known to act as artificial reefs by providing a habitat for sessile epifauna in a predominantly soft sediment environment. This epifauna is hypothesized to cast a so-called “shadow” over the soft sediment ecosystem by altering the nutrient composition in the overlying water column. In addition, the structure itself could alter currents and thereby influence the deposition and erosion of the sediments in the wake of the platform. This study aims to assess the long-term effects of a gas platform in the southern North Sea on the surrounding benthic community by both morphological and molecular identification of benthic species. The species composition and a set of abiotic factors of the sediment around a gas platform were assessed along four transects. Differences for the abiotic factors were found in the closer vicinity of the platform in the direction corresponding to the predominant currents. The number of benthic fauna families found in the molecular approach were on average three times higher than for the morphological approach. Both approaches showed that small differences occurred primarily due to changes in sedimentary organic matter content. Differences in species composition were more pronounced between transects rather than between distances from the platform.

Assessing the structure and functioning of the southern North Sea ecosystem with a food-web model

2018 ◽  
Vol 165 ◽  
pp. 280-297 ◽  
Author(s):  
Moritz Stäbler ◽  
Alexander Kempf ◽  
Axel Temming
Keyword(s):  
Food Web ◽  
North Sea ◽  
Southern North Sea ◽  
Food Web Model

Detrital zircon geochronology and heavy mineral analysis as complementary provenance tools in the presence of extensive weathering, reworking and recycling: the Neogene of the southern North Sea Basin

2021 ◽  
pp. 1-13
Author(s):  
Jasper Verhaegen ◽  
Hilmar von Eynatten ◽  
István Dunkl ◽  
Gert Jan Weltje
Keyword(s):  
North Sea ◽  
Chemical Weathering ◽  
Heavy Mineral ◽  
Mineral Analysis ◽  
Provenance Analysis ◽  
Detrital Zircon Geochronology ◽  
Southern North Sea ◽  
Variable Heavy ◽  
Mineral Data ◽  
Heavy Mineral Analysis

Abstract Heavy mineral analysis is a long-standing and valuable tool for sedimentary provenance analysis. Many studies have indicated that heavy mineral data can also be significantly affected by hydraulic sorting, weathering and reworking or recycling, leading to incomplete or erroneous provenance interpretations if they are used in isolation. By combining zircon U–Pb geochronology with heavy mineral data for the southern North Sea Basin, this study shows that the classic model of sediment mixing between a northern and a southern source throughout the Neogene is more complex. In contrast to the strongly variable heavy mineral composition, the zircon U–Pb age spectra are mostly constant for the studied samples. This provides a strong indication that most zircons had an initial similar northern source, yet the sediment has undergone intense chemical weathering on top of the Brabant Massif and Ardennes in the south. This weathered sediment was later recycled into the southern North Sea Basin through local rivers and the Meuse, leading to a weathered southern heavy mineral signature and a fresh northern heavy mineral signature, yet exhibiting a constant zircon U–Pb age signature. Thus, this study highlights the necessity of combining multiple provenance proxies to correctly account for weathering, reworking and recycling.

scholarly journals Macrofauna as a major driver of bentho‐pelagic exchange in the southern North Sea

2021 ◽  
Author(s):  
Andreas Neumann ◽  
Justus E. E. Beusekom ◽  
Annika Eisele ◽  
Kay‐Christian Emeis ◽  
Jana Friedrich ◽  
...  
Keyword(s):  
North Sea ◽  
Southern North Sea
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