The recolonization of the river Elbe with benthic and hyporheic Ostracoda (Crustacea) after the reunion of Germany in 1989

Abstract

In the year 2000, the benthic and hyporheic ostracod species were investigated in the groynes and the groyne fields of the river Elbe. In total only 12 species were found. The low number of species is owing to the few mesohabitats that occurred in the channel that was altered for navigation purposes, and that the river was severely polluted in the past, which led to an extinction of most species. Since about 1992 the Elbe is in a continuing phase of recolonization. Remarkably, the juveniles of the two species Pseudocandona albicans and Limnocythere inopinata occurred predominantly in the hyporheal within gravel of subaqueous dunes.

Effects of river bed regulation on habitats and communities: A case study for ostracods in the Oder River, Poland

“…Little is known about ostracod assemblages in groyne fields. So far, one work has been published, discussing the polluted Elbe River in the context of its recolonization after the German reunification in 1989 (Scharf & Brunke, 2013). As for the Oder, ostracod assemblages in groyne fields have been the subject of two studies conducted by the author of the present paper, focusing on seasonality (Szlauer-Łukaszewska, 2014).…”

New methods for collecting Ostracoda (Crustacea) in stony sediments with methodological remarks on the separation of ostracods from sediment

“…The device was successfully tested for sampling hyporheic living organisms (e.g., Bou & Rouch, 1967;Marmonier, 1988;Brunke & Gonser, 1999) and specif ically for hyporheic bacteria and ostracods in a subaqueous dune within the Elbe River (Wilczek et al, 2004;Scharf & Brunke, 2013). Many species could be detected in the hyporheal of the different habitats in the Elbe River ( …”

“…A pulsed water jet seems to be most effective for sampling such organisms. Our new methods are based on the experience of sampling invertebrates in the interstitial of rivers (Bou & Rouch, 1967;Marmonier, 1988;Brunke & Gonser, 1999;Scharf & Brunke, 2013).…”

“…1820), Herpetocypris chevreuxi (Sars, 1896), Ilyocypris monstrifica and Darwinula stevensoni(Brady & Robertson, 1870) were not present in the hyporheal, but in the benthal(Scharf & Brunke, 2013).…”

“…Occurrence of ostracods in the hyporheal of different habitats in the river Elbe near Coswig in 2000(modified fromScharf & Brunke, 2013) ad, adult; juv, juvenile.…”