Variation in the trophic structure and species composition of some invertebrate communities in polluted kelp forests in the North Sea

1973 ◽  
Vol 20 (4) ◽  
pp. 351-365 ◽  
Author(s):  
D. J. Jones
Keyword(s):  
Species Composition ◽  
North Sea ◽  
Trophic Structure ◽  
Kelp Forests ◽  
Invertebrate Communities ◽  
The North ◽  
The North Sea

Coincident changes in four components of the North Sea ecosystem

1999 ◽  
Vol 79 (1) ◽  
pp. 183-185 ◽  
Author(s):  
K.F. Pearce ◽  
C.L.J. Frid
Keyword(s):  
Time Series ◽  
Species Composition ◽  
North Sea ◽  
Food Chain ◽  
Demersal Fish ◽  
North West ◽  
The North ◽  
The North Sea ◽  
Chain Links ◽  
Single Set

An analysis of species composition of the zooplankton, macrobenthos (two stations) and demersal fish from Northumberland (north-west North Sea) are reported. The four time-series show synchronous changes in species composition. While some of these changes coincide with changes in climateological variables, others do not. The degree of synchrony implies that either all the time-series are responding to a single set of extraneous forcing factors, or that food chain links, rapidly translate the signal through all ecosystem components.

scholarly journals Accurate long-read eDNA metabarcoding of North Sea fish using Oxford Nanopore sequencing

2021 ◽  
Vol 4 ◽  
Author(s):  
Karlijn Doorenspleet ◽  
Lara Jansen ◽  
Saskia Oosterbroek ◽  
Reindert Nijland
Keyword(s):  
Species Composition ◽  
North Sea ◽  
Taxonomic Resolution ◽  
Reference Database ◽  
Test Accuracy ◽  
Nanopore Sequencing ◽  
The North ◽  
Field Samples ◽  
Long Read ◽  
The North Sea

To halt North Sea ecosystem degradation, accurate and intensive monitoring of the North Sea ecosystem and its fish is vital to correctly inform management decisions. DNA based techniques and especially the use of environmental (e)DNA from seawater can become a powerful monitoring tool. However, current eDNA based metabarcoding approaches are based on genetic target regions of <500 nucleotides which offers only limited taxonomic resolution. We tested sensitivity and applicability for field samples of newly designed universal fish primer targeting a 2kb region covering mitochondrial 12S and 16S genes in eDNA samples. Samples were processed using long read nanopore sequencing in combination with the consensus builder Decona and retrieved accurate read identities of up to 99.9%. To test accuracy of the primer, eDNA was analyzed from a tropical aquarium with a known species composition of bony fish and elasmobranchs. This showed that over 50% of species present can be identified. The majority of remaining reads are identified as -in aquarium present- genera and can be explained by an incomplete reference database for the fish present in the aquarium. Primers were also applied in North sea eDNA field samples. Distinct species compositions between different locations could be observed and consisted of ecological relevant species and shows the applicability for long-read eDNA metabarcoding in field studies. Incomplete reference databases currently form the main bottleneck to further develop high resolution nanopore based long read sequencing as metabarcoding strategy. Nevertheless, this study shows that long read nanopore sequencing of eDNA can be used to obtain accurate information on the fish and elasmobranch species composition in the North Sea and beyond.

The Ship Canal between the North Sea and the Baltic

1891 ◽  
Vol 32 (828supp) ◽  
pp. 13224-13224
Keyword(s):  
North Sea ◽  
The North ◽  
The North Sea ◽  
The Baltic

Long Term Changes in Wind and Wave Climate on the North Sea

1991 ◽  
Author(s):  
Frank M. J. Hoozemans
Keyword(s):  
North Sea ◽  
Wave Climate ◽  
The North ◽  
Long Term Changes ◽  
The North Sea

Detecting plankton shifts in the North Sea: a new abrupt ecosystem shift between 1996 and 2003

2014 ◽  
Vol 502 ◽  
pp. 85-104 ◽  
Author(s):  
G Beaugrand ◽  
X Harlay ◽  
M Edwards
Keyword(s):  
North Sea ◽  
The North ◽  
Ecosystem Shift ◽  
The North Sea

Induction of micronuclei and other nuclear abnormalities in blue mussels Mytilus edulis after 1-, 2-, 4- and 8-day treatment with crude oil from the North Sea

Ekologija ◽  
2010 ◽  
Vol 56 (3) ◽  
pp. 124-131 ◽  
Author(s):  
Janina Baršienė ◽  
Laura Andreikėnaitė ◽  
Anne Bjornstad
Keyword(s):  
Crude Oil ◽  
Mytilus Edulis ◽  
North Sea ◽  
Day Treatment ◽  
Nuclear Abnormalities ◽  
Blue Mussels ◽  
The North ◽  
The North Sea
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