Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern Norway

Two new amphipods for Norway Melita nitida and Corophium multisetosum (Crustacea; Amphipoda) were registered in brackish waters in the Tista Estuary in Halden, southeastern Norway. Both species were found in the samples from Tista’s outlet into the Idde Fjord, C. multisetosum in the beach zone and M...

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Main Authors: Ingvar Spikkeland, Jens Petter Nilssen
Format: Article
Language:English
Published: Norwegian University of Science and Technology 2021-11-01
Series:Fauna Norvegica
Subjects:
Online Access:https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/3957
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author Ingvar Spikkeland
Jens Petter Nilssen
author_facet Ingvar Spikkeland
Jens Petter Nilssen
author_sort Ingvar Spikkeland
collection DOAJ
description Two new amphipods for Norway Melita nitida and Corophium multisetosum (Crustacea; Amphipoda) were registered in brackish waters in the Tista Estuary in Halden, southeastern Norway. Both species were found in the samples from Tista’s outlet into the Idde Fjord, C. multisetosum in the beach zone and M. nitida at about 4 m depth. Melita nitida is a North American species first found in Europe in the Netherlands in 1998, and since then dispersed into the Baltic Sea via the Kiel Canal and now also found several places on the German Baltic Sea coast and in the Black Sea. Corophium multisetosum was collected even before the 1920s in Western Europe, and is considered native for Europe, whereas its relationship to North America is more ambiguous. From the British Isles and the Netherlands, it seems to have spread to Germany, Poland, Denmark and Sweden, and at present Norway. Until now the two species were found in small numbers at the Norwegian sites and their influence on the total benthic community is probably negligible in this initial phase. The Tista Estuary in Halden apparently appears to be a hotspot for alien brackish water species in Norway. Generally estuaries, with their combination of brackish water jointly with their unsaturated ecological niches and intensive international ship traffic, seem to possess the highest potential infection rate for aquatic systems with alien acrozoobenthic species.
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spelling doaj.art-13594ce2c38f45afaae75aae4783f1342022-12-21T20:05:05ZengNorwegian University of Science and TechnologyFauna Norvegica1502-48731891-53962021-11-014110.5324/fn.v41i0.3957Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern NorwayIngvar Spikkeland0Jens Petter NilssenOstfold Museum FoundationTwo new amphipods for Norway Melita nitida and Corophium multisetosum (Crustacea; Amphipoda) were registered in brackish waters in the Tista Estuary in Halden, southeastern Norway. Both species were found in the samples from Tista’s outlet into the Idde Fjord, C. multisetosum in the beach zone and M. nitida at about 4 m depth. Melita nitida is a North American species first found in Europe in the Netherlands in 1998, and since then dispersed into the Baltic Sea via the Kiel Canal and now also found several places on the German Baltic Sea coast and in the Black Sea. Corophium multisetosum was collected even before the 1920s in Western Europe, and is considered native for Europe, whereas its relationship to North America is more ambiguous. From the British Isles and the Netherlands, it seems to have spread to Germany, Poland, Denmark and Sweden, and at present Norway. Until now the two species were found in small numbers at the Norwegian sites and their influence on the total benthic community is probably negligible in this initial phase. The Tista Estuary in Halden apparently appears to be a hotspot for alien brackish water species in Norway. Generally estuaries, with their combination of brackish water jointly with their unsaturated ecological niches and intensive international ship traffic, seem to possess the highest potential infection rate for aquatic systems with alien acrozoobenthic species.https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/3957Crustaceainvasive speciesdispersalrange expansionAmphipoda
spellingShingle Ingvar Spikkeland
Jens Petter Nilssen
Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern Norway
Fauna Norvegica
Crustacea
invasive species
dispersal
range expansion
Amphipoda
title Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern Norway
title_full Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern Norway
title_fullStr Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern Norway
title_full_unstemmed Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern Norway
title_short Alien amphipods (Arthopoda; Crustacea) in the Tista Estuary, Halden, southeastern Norway
title_sort alien amphipods arthopoda crustacea in the tista estuary halden southeastern norway
topic Crustacea
invasive species
dispersal
range expansion
Amphipoda
url https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/3957
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