scholarly journals A supplement to the amphipod (Crustacea) species inventory of Helgoland (German Bight, North Sea): indication of rapid recent change

Author(s):  
Jan Beermann ◽  
Heinz-Dieter Franke
2019 ◽  
Vol 625 ◽  
pp. 41-52 ◽  
Author(s):  
D Martínez-Alarcón ◽  
R Saborowski ◽  
E Melis ◽  
W Hagen

1997 ◽  
Vol 34 (6) ◽  
pp. 375-381 ◽  
Author(s):  
G. Radach ◽  
K. Heyer

2016 ◽  
Vol 37 (2) ◽  
pp. 93-109 ◽  
Author(s):  
Peter Holler ◽  
Edith Markert ◽  
Alexander Bartholomä ◽  
Ruggero Capperucci ◽  
H. Christian Hass ◽  
...  

2009 ◽  
Vol 61 (4) ◽  
pp. 234-243 ◽  
Author(s):  
Hannes Baumann ◽  
Arne M. Malzahn ◽  
Rudi Voss ◽  
Axel Temming
Keyword(s):  

2004 ◽  
Vol 58 (4) ◽  
pp. 223-229 ◽  
Author(s):  
Heinz-Dieter Franke ◽  
Friedrich Buchholz ◽  
Karen H. Wiltshire
Keyword(s):  

1991 ◽  
Vol 24 (10) ◽  
pp. 77-85 ◽  
Author(s):  
J. Klamer ◽  
R. W. P. M. Laane ◽  
J. M. Marquenie

From literature data it is calculated that on an annual basis, 11 to 17 tonnes of PCBs enter the North Sea. Largest sources are the Atlantic Ocean and the atmosphere: together they account for 60-79% of the total input. Sources with greatest impact are the rivers, sewers and sludge. Highest concentrations are found close to the Dutch shore and in the German Bight. The PCB levels result in adverse effects on the seal population in the Wadden Sea. Of the total world PCB production, at least 57% is still in use and their future dispersal into the oceans cannot easily be controlled. If the increase in ocean PCB concentration continues, it may ultimately result in the extinction of fish-eating marine mammals.


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