Invasive Species Compendium

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Abstract

The first record of alien bryozoan Pectinatella magnifica in the dnieper river basin and evaluation of its dissemination paths.

Abstract

The paper presents information on the first record of the alien bryozoan Pectinatella magnifica in the Dnieper River basin (Ukraine). It was stated, that the species prefers biotopes with the changing flow velocity and direction, or close to the heated waters discharge. Its development is also facilitated by the closely located vegetation of the reed and «moderate state» of the aquatic environment, conditioned by the moderate organic pollution. Eutrophication intensification along with climate changes are favorable for Pectinatella magnificats areal widening. Analysis of the probable paths and dynamics of the species dissemination in Europe enabled to make a substantiated suggestion, that significant invasion intensification was associated with start of the active use of the woven threads and neoprene clothing for the amateur fishing, which are suitable as a substrate for the spinoblasts attachment. The conclusion was made that the most probable way of the species invasion in the Dnieper basin is the spinoblasts' transfer from the Danube delta along with the fishing equipment.