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Hydrobiologia

, Volume 548, Issue 1, pp 127–139 | Cite as

Zooplankton Communities of a Dammed Estuary in the Bay of Fundy, Canada

  • C. Isabelle Aubé
  • Andrea LockeEmail author
  • Greg J. Klassen
Primary Research Paper

Abstract

The upper estuary of the macrotidal Petitcodiac River, New Brunswick, Canada, was converted to a freshwater impoundment by construction of a causeway in 1968. Thirty years later, zooplankton community structure in the impoundment was characteristic of a disturbed ecosystem. The depauperate zooplankton consisted of a mixture of freshwater and marine/brackish taxa, but was not typical of regional estuaries or lakes. The causeway dam was an obstacle to fish migration, and several anadromous species that would formerly have been represented in the ichthyoplankton were absent. The invertebrate plankton community was dominated by rotifers, likely as a result of frequent water level fluctuations, and highly suspended sediment levels in the water column. Estuarine/marine calanoids (Eurytemora affinis, Temora longicornis, Centropages typicus, Tortanus discaudatus), the mysid Neomysis americana, and Cancer crab zoeae were collected in fresh water up to 14 km upstream of the causeway.

Keywords

causeway ichthyoplankton impoundment macrotidal system Petitcodiac River 

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Copyright information

© Springer 2005

Authors and Affiliations

  • C. Isabelle Aubé
    • 1
  • Andrea Locke
    • 1
    Email author
  • Greg J. Klassen
    • 2
  1. 1.Gulf Fisheries CentreFisheries and Oceans CanadaNew BrunswickCanada
  2. 2.Tau BioDiversityPollett RiverNew BrunswickCanada

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