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  • ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD  (2)
  • Kiel : Forschungs- und Technologiezentrum Westküste (FTZ), Büsum, Zentrale Einrichtung der Christian-Albrechts-Universität zu Kiel  (1)
  • Springer  (1)
  • 1
    Online Resource
    Online Resource
    Kiel : Forschungs- und Technologiezentrum Westküste (FTZ), Büsum, Zentrale Einrichtung der Christian-Albrechts-Universität zu Kiel
    Keywords: Forschungsbericht ; Heringsmöwe ; Basstölpel ; Vogelflug ; Windpark
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (49 Seiten, 3,21 MB) , Illustrationen, Diagramme, Karten
    Language: German
    Note: Förderkennzeichen BMWi 0325281 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Zusammenfassungen in deutscher und englischer Sprache
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  • 2
    ISSN: 1439-0361
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Von April bis Juli 1993 wurden in der südöstlichen Nordsee von Schiffen aus auf 300 m breiten Transekten Seevögel kartiert. Dabei konnte für einige Arten der Bestand abseits des Wattenmeeres und der Küste hinlänglich genau geschätzt werden. Baßtölpel (800 Ind.), Eissturmvogel (8000 Ind.), Dreizehenmöwe (4200 Ind.) und Trottellumme (3100 Ind.) kamen fast ausschließlich in der Nähe des Brutplatzes Helgoland und weiter seewärts vor. Herings- (25 000 Ind.) und Silbermöwe (2100 Ind.) waren weit verbreitet; die Heringsmöwe konzentrierte sich weiter entfernt von der Küste als die Silbermöwe und trat in hohen Dichten vor allem in der Nähe von Fischkuttern auf. Mantelmöwen (1200 Ind.) wurden vor allem im Südosten des Untersuchungsgebietes regelmäßig, aber in stets geringer Anzahl festgestellt. Sturm- und Lachmöwe wurden fast nur im Wattenmeer in allerdings oftmals hoher Dichte registriert. Die Flußseeschwalbe war stark an die Kolonien nahe der Küste gebunden, während die Brandseeschwalbe auch weiter auf See beobachtet wurde.
    Notes: Abstract Seabirds were counted from ships on 300 m wide transects in the southeastern North Sea between April and July 1993. For some species the numbers off the coast and off the Waddensea area could be estimated. Gannet (Morus bassanus, 800 individuals), Fulmar (Fulmarus glacialis, 8000 ind.), Kittiwake (Rissa tridactyla, 4200 ind.) and Common Guillemot (Uria aalge, 3100 ind.) occurred with few exceptions only in the vicinity of the breeding site on Helgoland and further towards the open sea. Lesser Black-backed Gull (Larus fuscus, 25000 ind.) and Herring Gull (Larus argentatus, 2100 ind.) were widely distributed: Lesser Black-backed Gulls concentrated in larger distances from the coast than Herring Gulls did. They were found in high densities above all near trawlers. Great Black-backed Gulls (Larus marinus, 1200 ind.) were seen regularly but always in low numbers in the southeastern part of the study area. Common Gull (Larus canus) and Black-headed Gull (Larus ridibundus) were observed almost exclusively in the Wadden Sea but in sometimes remarkably high densities. Common Terns (Sterna hirundo) were more or less confined to the area of their breeding colonies whereas Sandwich Terns (Sterna sandvicensis) were also found further out to the sea.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2019-09-04
    Description: The non-breeding distribution of common scoter (Melanitta nigra), which occur in high densities offshore from the eastern Wadden Sea, has been well documented in recent decades, but factors influencing these patterns remain poorly known. We investigated the prey choice of 88 common scoter using stomach contents of beached birds collected over a period of 12 years. We then used benthos data and hydrodynamic parameters to model the June–September distribution patterns during the flightless period of common scoter based on transect count data off the north-eastern German Wadden Sea. Benthic fauna biomass in areas used by common scoter was higher than in areas where the species was absent. American razor clam (Ensis leei) invaded the Wadden Sea during the end of the 1970s and was the most common prey, both in benthos samples from below feeding common scoter and in stomach samples. The relatively high flesh to shell ratio of the American razor clam makes it the most attractive available prey item for common scoter. The abundance of American razor clams explained the distribution of scoter to a high degree, although the best model fit included negative effects of water depth and positive effects of bed shear stress intensity on scoter abundance. Our data show that the neobiotic American razor clams have become an important part of the diet of these sea ducks, whereas the cut trough shell (Spisula subtruncata) was of substantially lesser importance than expected from historical data. Our study shows the ability of a top avian predator to respond to novel developments in bivalve prey availability over periods of a few decades.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 4
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    ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
    In:  EPIC3Estuarine Coastal and Shelf Science, ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 233, ISSN: 0272-7714
    Publication Date: 2020-01-14
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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