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  • 1995-1999  (7)
Document type
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Red List of macrofaunal benthic invertebrates of the Wadden Sea (1996)
    Springer
    Helgoland marine research 50 (1996), S. 69-76 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the Wadden Sea, in total, 93 species of macrofaunal benthic invertebrates are threatened in at least one subregion. Of these, 72 species are threatened in the entire area and are therefore placed on the trilateral Red List. 7 species are (probably) extinct in the entire Wadden Sea area. The status of 9 species of macrofaunal invertebrates is critical, 13 species are (probably) endangered, the status of 25 species is (probably) vulnerable and of 17 species (probably) susceptible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02366174
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Red List of marine macroalgae of the Wadden Sea (1996)
    Springer
    Helgoland marine research 50 (1996), S. 39-42 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02366172
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Red List of lampreys and marine fishes of the Wadden Sea (1996)
    Springer
    Helgoland marine research 50 (1996), S. 101-105 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the Wadden Sea areas of Denmark, Germany and The Netherlands, a total of 162 fish and lamprey species is known. 72 of these species are migrants entering the area occasionally; the total number of resident species in the Wadden Sea area is 90. In the Wadden Sea, in total, 20 species of fish and lamprey species are threatened in at least one subregion. Of these, 19 species are threatened in the entire area and are therefore placed on the trilateral Red List. 2 species of the listed fish and lamprey species are (probably) extinct in the entire Wadden Sea area. The status of 5 species of fish and lamprey species is critical, 5 species are (probably) endangered, the status of 6 is vulnerable and of 1 species susceptible. For about 16 rare species which may also be threatened, data were not sufficient to estimate past and present population sizes. The contributors to the list would like to encourage researchers to intensify work on the ecology and the present population sizes of these rare Wadden Sea species (see Fricke et al., 1995).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02366178
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Red List of birds of the Wadden Sea area (1996)
    Springer
    Helgoland marine research 50 (1996), S. 113-128 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 350000–400000 pairs of breeding birds as well as 10–12 millions of migratory waterbirds use the Danish-German-Dutch Wadden Sea as a feeding, roosting and moulting area. The exact number of migrating birds using the Wadden Sea is unknown. 4 Wadden Sea breeding bird species are (probably) extinct in the area, e.g. Caspian Tern (Sterna caspia) and Roseate Tern (Sterna dougallii); the status of 5 species is critical, 4 species are endangered, the status of 6 species is vulnerable and of 4 species susceptible. Internaional responsibility can be stated for at least 15 breeding bird species or subspecies, because considerable parts of the north-west-european population (at least 5%) breed in the Wadden Sea (e.g. Eurasian Spoonbill (Platalea leucorodia), Common Shelduck (Tadorna tadorna), Hen Harrier (Circus cyaneus), Avocet (Recurvirostra avosetta), Kentish Plover (Charadrius alexandrinus), Common Redshank (Tringa totanus totanus), Gull-billed Tern (Gelochelidon nilotica), Sandwich Tern (Sterna sandvicensis), Common Tern (Sterna hirundo), Little Tern (Sterna albifrons). International responsibility can be determined for at least 54 migratory bird species or subspecies, because considerable parts of the biogeographical population (at least 1%) occur in the Wadden Sea during migration. Some species are present in the Wadden Sea with about 50% or nearly 90% of all individuals of the concerned populations, which means a very special international responsibility of the Wadden Sea has to be stated for these species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02366180
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    Paper (German National Licenses)
    Fulltext
  • 5
    facet.materialart.
    Unknown
    V Red List of macrofaunal benthic invertebrates of the Wadden Sea (1996)
    In:  EPIC3Helgoländer MeeresuntersuchungenSuppl, 50, pp. 69-76
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 6
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    Unknown
    Introduced marine species of the North Sea coasts (1999)
    In:  EPIC3Helgoländer Meeresuntersuchungen, 52, pp. 219-234
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    Introduced marine species of the North Sea coasts (1999)
    Springer
    In:  Helgoland Marine Research, 52 . pp. 219-234.
    Details
    Publication Date: 2018-05-28
    Description: About 80 non-indigenous species are assumed to have been introduced into the North Sea by transoceanic shipping and aquaculture. The number is certainly underestimated as most small organisms received insufficient attention at the species level. Also, the seafaring tradition of the North Sea countries is much longer than our biological surveys are. Most exotic invertebrates originate from the western Atlantic and were introduced by shipping, while most algae stem from the Pacific and came with the introduced oysters. A peak of newcomers was observed in the 1970s. Most of the arrivals became established in brackish environments, at harbor sites and in the vicinity of oyster farms, fouling on hard substrates or living as epibionts. A few live in sediments, are holoplanktonic or are parasites. At the open coast, approximately 6% of the macrobenthic species are exotics, while in estuaries their share is up to 20%. Most exotics have been encountered in the southern North Sea first, and many did not spread further north. About 25% of the established non-natives are widespread and attain locally high abundances. As a consequence, some inshore habitats are entirely dominated by exotics. The overall effect on the ecosystem seems to be more additive than one of displacement. This suggests that the coastal biota of the North Sea are quite capable of accommodating newcomers. However, this is no guarantee that the next introduced species may not cause severe ecological change or economic harm. There is a need to minimize the risk of unintentional introductions by ballast water treatment and by adhering to quarantine procedures in aquaculture. Current research on exotics in the North Sea is regarded as inadequate for proper evaluation and management requirements.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/BF02908898
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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