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Native and exotic Amphipoda and other Peracarida in the River Meuse: new assemblages emerge from a fast changing fauna
Josens, G.; Bij de Vaate, A.; Usseglio-Polatera, P.; Cammaerts, R.; Chérot, F.; Grisez, F.; Verboonen, P.; Vanden Bossche, J.P. (2005). Native and exotic Amphipoda and other Peracarida in the River Meuse: new assemblages emerge from a fast changing fauna. Hydrobiologia 542(1): 203-220. dx.doi.org/10.1007/s10750-004-8930-9
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer
Peer reviewed article  

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Trefwoorden
    Dominante soorten; Freshwater crustaceans; Geïntroduceerde soorten; Gemeenschapssamenstelling; Indigenous species; Rivieren; Amphipoda [WoRMS]; Chelicorophium curvispinum (G.O. Sars, 1895) [WoRMS]; Chelicorophium curvispinum (G.O. Sars, 1895) [WoRMS]; Crangonyx pseudogracilis Bousfield, 1958 [WoRMS]; Dikerogammarus villosus (Sowinsky, 1894) [WoRMS]; Gammarus fossarum Koch, 1836 [WoRMS]; Gammarus tigrinus Sexton, 1939 [WoRMS]; Peracarida [WoRMS]; France, Lorraine [Marine Regions]; Netherlands, Meuse [Marine Regions]; Zoet water
Author keywords
    aquatic biodiversity; alien species; invasive species; invasibility; community dynamics; Dikerogammarus villosus; Chelicorophium curvispinum

Auteurs  Top 
  • Josens, G.
  • Bij de Vaate, A.
  • Usseglio-Polatera, P.
  • Cammaerts, R.
  • Chérot, F.
  • Grisez, F.
  • Verboonen, P.
  • Vanden Bossche, J.P.

Abstract
    Samples issued from intensive sampling in the Netherlands (1992–2001) and from extensive sampling carried out in the context of international campaigns (1998, 2000 and 2001) were revisited. Additional samples from artificial substrates (1992–2003) and other techniques (various periods) were analysed. The combined data provide a global and dynamic view on the Peracarida community of the River Meuse, with the focus on the Amphipoda. Among the recent exotic species found, Crangonyx pseudogracilis is regressing, Dikerogammarus haemobaphes is restricted to the Condroz course of the river, Gammarus tigrinus is restricted to the lowlands and seems to regress, Jaera istri is restricted to the ‘tidal’ Meuse, Chelicorophium curvispinum is still migrating upstream into the Lorraine course without any strong impact on the other amphipod species. After a rapid expansion Dikerogammarus villosus has continued its upstream invasion between 1998 and 2002 at a rate of 30–40 km per year, but no further progression was noticed in 2003. Locally and temporarily the native species (Gammarus fossarum and G. pulex) and naturalized species (G. roeseli and Echinogammarus berilloni) may have been excluded by the most recent invaders (mainly D. villosus), but none of the native and naturalized species has disappeared completely.Therefore, the number of amphipod species found in the River Meuse has increased. Moreover, the native and naturalized species keep on dominating the tributaries from which the recent invaders seem to beexcluded. A changing Peracarida community structure is observed along the course of the River Meuse: four native or naturalized species inhabit the upstream (Lorraine) course, three invasive species dominate in the middle reach (Ardenne-Condroz zone), one exotic species is housed in the Border Meuse and three or four invasive species dominate the assemblages in the lowlands.

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