Bogatov V.V., Astakhov M.V.
В журнале Inland Water Biology
Год: 2011 Том: 4 Номер: 1 Страницы: 56-64
According to quantitative indices, the under-ice drift of invertebrates in the piedmont part of the Kedrovaya River (Primorskii Krai) is lower than during the ice-free period. The winter drift is constituted mainly by Diptera and Ephemeroptera. In the warm season, an active drift of hydrobionts is observed only at night; during the freezing-over period, the drift occurs both at night and in the daytime. The number of daytime migrants prevails over organisms drifting at night. The drift of invertebrates is rather low at twilight. The coming of spring thaw and the appearance of gullies leads to an increase in the abundance of animals in the stream. After the ice breaks up in the river, the larvae of Ephemeroptera return to night-drift activity upon the recession of the flood. However, quantitative indices of the daytime drift of other invertebrate groups remains rather high.
