By Henri J. Dumont, Tamara A. Shiganova, Ulrich Niermann

The Mediterranean, Black, and Caspian Seas, the rivers and canals that attach them, and the big quantity of transport within the area, symbolize a conduit for aquatic invasion, whose effects are just now commencing to be understood. This e-book presents an up to date evaluate of jelly invasions within the Ponto-Caspian that have affected neighborhood ecosystems because the early Nineteen Eighties, contrasting that with different organic invasions, looking for underlying principles.

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STATE OF THE INDIGENOUS GELATINOUS ANIMALS IN THE BLACK SEA: THE JELLYFISH AURELIA AURITA AND THE COMB-JELLY PLEUROBRACHIA PILEUS IN 1999-2002 In 1999-2002, the biomass of Aurelia aurita remained comparable with the preceding years (140-360 g m-2); the biomass of Pleurobrachia pileus, in contrast, was lower in 1999-2001 than before (61-128 g m-2) (Fig. 8). This could reflect consumption of P. pileus by B. cf ovata. In aquarium conditions, Beroe indeed readily eats P. , 2000a,b). 2. STATE OF THE PHYTOPLANKTON Phytoplankton composition, abundance and biomass were investigated in early September 2002 while B.

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