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  • 1
    Online Resource
    Online Resource
    Dordrecht :Springer Netherlands,
    Keywords: Nonindigenous aquatic pests--Europe. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (592 pages)
    Edition: 1st ed.
    ISBN: 9789401599566
    Language: English
    Note: Intro -- Title Page -- Copyright -- Contents -- Preface -- Introduction -- References.
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  • 2
    Keywords: Aufsatzsammlung
    Type of Medium: Book
    Pages: 260 S , graph. Darst
    Series Statement: Oceanological and hydrobiological studies 34,suppl.1
    Language: English
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  • 3
    Keywords: Nonindigenous aquatic pests ; Pest introduction ; Nonindigenous aquatic pests Europe ; Nonindigenous aquatic pests Europe ; Pest introduction Europe ; Pest introduction Europe ; Aufsatzsammlung ; Europa ; Wassertiere ; Invasion ; Europa ; Wassertiere ; Invasion
    Description / Table of Contents: The global scale of alien species invasions is becoming more and more evident in the
    Type of Medium: Book
    Pages: IX, 583 S. , Ill., graph. Darst., Kt.
    ISBN: 9781402008375 , 1402008376
    DDC: 577.18
    Language: English , German
    Note: Literaturverz. S. 548 - 583
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  • 4
    Book
    Book
    Copenhagen: Nordic Council of Ministers [u.a.]
    Type of Medium: Book
    Pages: 244 S , Ill., graph. Darst., Kt
    ISBN: 9289302933
    ISSN: 0903-7004
    Series Statement: Nord 8
    Language: English
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Helgoland marine research 17 (1968), S. 291-301 
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1. In the Gullmarsfjord (west coast of Sweden), an area affected by paper- and pulp-mill wastes was studied. 2. In the interstitial water separated by centrifuging, a relatively high salinity was found. In the studied topmost 8 cm of the sediment, the salinity increased distinctly downward. 3. The polluted sediments, containing wood fibre, had high calcination losses and great contents of interstitial water. This water had a low pH and great KMnO4 consumption. 4. Disappearance of the bottom fauna on the most heavily polluted area and the moving of the maxima of the faunal parameters during a period of 35 years are demonstrated.
    Notes: Kurzfassung Der Saltkällefjord, ein Arm des Gullmarsfjords an der Westküste Schwedens, wird seit mehr als achtzig Jahren von den Abwässern einer Sulfitzellulose- und Papierfabrik beeinflußt. Um die Einflüsse der Verunreinigung verfolgen zu können, sind hydrographische und biologische Untersuchungen von der Zoologischen Station Kristineberg durchgeführt worden. Das Ziel dieser Arbeit ist die Beschreibung des heutigen Zustandes der Sedimente und der Bodenfauna im Saltkällefjord. Bei den hydrographischen und bodenfaunistischen Untersuchungen wurden konventionelle Methoden benutzt. Die Sedimentproben — mit einem Schlammstecher gewonnen — entstammen den oberen 8 cm des Sedimentes. Sie wurden in 2 cm dicke Sektionen geschnitten und zentrifugiert, wobei das interstitielle Wasser abgetrennt wurde. Im interstitiellen Wasser wurde ein relativ hoher und im Sediment abwärts zunehmender Salzgehalt festgestellt. Um die Beschaffenheit der verunreinigten Böden im Saltkällefjord zu charakterisieren, sind die großen Glühverluste der Sedimente, die Sauerstoffarmut des Bodenwassers, das beträchtliche Volumen, die hohe KMnO4-Zahl, der relativ niedrige pH-Wert und das häufige Auftreten von Schwefelwasserstoff im interstitiellen Wasser zu berücksichtigen. Außerhalb der Mündung des Flusses Örekilsälven ist die Bodenfauna vollständig verschwunden. An der Außenseite dieses unbewohnten Gebietes ist eine Grenzzone, charakterisiert durch das Vorkommen des PolychaetenCapitella capitata, zu finden. Im mittleren Teil des Fjords sind Maxima der Individuenzahl und der Zahl der Bodentierarten festgestellt worden. Das Maximum der Individuenzahl hat sich seit 1932 etwa 2 km und das Maximum der Artenzahl auf 1,2 km in südwestlicher Richtung verlagert.Capitella capitata, eine dort erst neuerdings auftretende Species, ist bei dieser Bestandsaufnahme nicht berücksichtigt worden.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 393 (1999), S. 233-243 
    ISSN: 1573-5117
    Keywords: introduced species ; zoobenthos ; functional diversity ; coastal zone ; Baltic Sea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Semi-enclosed coastal inlets are particularly interesting areas for studies on non-native species since they show steep gradients in physical environment, biological communities, pollution and intensity of human activities. Due to the ecotone effect their biota is constituted of a mixture of marine, brackish and freshwater indigenous and non-indigenous species. In comparison with offshore areas the coastal inlets seem to be better invadible, and the effects of introductions are more evident here. This paper presents results of a comparative study on non-native benthic species in the semi-enclosed water bodies of the Southern (Curonian and Vistula lagoons) and Northern Baltic (inner Archipelago Sea and Northern Quark, Gulf of Bothnia), which differ by their origin and present environment, scope of anthropogenic impact and level of euthrophication. These areas presently host at least 18 non-native benthic invertebrate species. The ecological role of these species is evaluated in terms of: (a) their relative abundance and biomass in bottom communities; (b) their 'feeding/mobility' status and their ability to alter the physical/chemical environment of the ecosystems they invaded; (c) vacancy/occupancy of the niches before these species introduced. The comparative analysis shows that the non-native species have significantly altered ecosystems of the SE Baltic coastal lagoons, while their role in the northern coastal waters still is much less important. The invadibility of different types of the Baltic coastal lagoons and inlets is discussed on the basis of the present study.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Biological invasions 2 (2000), S. 151-163 
    ISSN: 1573-1464
    Keywords: Baltic Sea ; introduced species ; invasive species ; spread ; vector ; xenodiversity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Baltic Sea, a semi-enclosed brackish water region, has been inoculated by non-indigenous species for centuries. Today, much of its biological diversity is of foreign origin (i.e. xenodiversity), intentionally or unintentionally moved by humans over ecological and geographical barriers. As many as 98 introduced species have been recorded in the Baltic Sea and Kattegat. The role and abundance of much of the unique native brackish water fauna of the Baltic Sea are threatened by these non-indigenous species. The rate of primary introductions into the Baltic has increased since the 1950s; the secondary rate of spread of non-indigenous species within the basin varies from 30–480 km/year. We review here the invasion histories of the brown alga Sargassum muticum (introduced in the early 1990s), the mud snail Potamopyrgus antipodarum (1887), the barnacle Balanus improvisus (1844), the polychaetes Marenzelleria viridis (1985) and Polydora redeki (1963), the cladoceran Cercopagis pengoi (1992) and the mysid shrimp Hemimysis anomala (1962).
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-9710
    Keywords: aquatic biodiversity ; Baltic Sea ; eutrophication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The Archipelago Sea in the northern Baltic has been subjected to large-scale cultural, economic and ecological changes, especially during the last three decades. Environmental threats originate from both basin-wide sources, affecting the whole Baltic Sea, and from local sources, such as nutrient loading from nearby river outflows, intense agriculture, fish farming, ships' traffic, boating, and man's physical impacts on the landscape and seascape. Both the Åland archipelago and the Archipelago Sea have been listed as hot-spots by HELCOM, Baltic Marine Environment Protection Commission, eutrophication being the main threat to the aquatic environment. In this study we review how biological communities have reacted to an increase in man-induced multisource stresses. Changes in plankton, benthic animals, macroalgal assemblages and fish communities have been documented in most parts of the Baltic Sea since the 1970s. What remains to be understood is the importance of these structural changes for the functioning of the Archipelago Sea ecosystem under various levels of human impact.
    Type of Medium: Electronic Resource
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  • 9
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    Unknown
    NRC
    In:  Canadian Journal of Fisheries and Aquatic Sciences, 59 (7). pp. 1175-1188.
    Publication Date: 2021-11-18
    Description: There are about 100 nonindigenous species recorded in the Baltic Sea. Invasive species have resulted in major changes in nearshore ecosystems, especially in coastal lagoons and inlets that can be identified as "centres of xenodiversity". Fewer than 70 of these species have established reproducing populations. Dominant invasion vectors include unintentional introductions via ballast water, tank sediments, and hull fouling, aquaculture, and the construction of canals that have facilitated active or passive natural dispersal. Of the approximately 60 unintentionally introduced species with a known invasion history, 38 are transoceanic (including 19 Atlantic species of American origin) and 18 of Ponto-Caspian origin. Species that have caused economic damage to fisheries, shipping, and industry include the hydrozoan Cordylophora caspia, the barnacle Balanus improvisus, the cladoceran Cercopagis pengoi, and the bivalve Dreissena polymorpha. The Baltic Sea has served as a secondary source of nonindigenous species to the North American Great Lakes. Further study is warranted to quantify large-scale ecosystem changes in the Baltic associated with establishment and population growth of nonindigenous species and to prevent future invasions.
    Type: Article , PeerReviewed
    Format: text
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