GOROVAYA E. A.
Amurian zoological journal 2026; XVIII(2): 507-516
This article presents data on the quantitative characteristics of zoobenthos from the riffle-pool structural elements of the metarithral of the Tigrovaya River (Partizansky Municipal District, Primorsky Krai), based on a series of collections from 2020-2021. For the first time, it is shown that the dynamics of these characteristics are unique to the pool, riffle, and run communities. The role of each structural element in shaping the overall abundance and biomass of zoobenthos in the riffle-pool system varies throughout the year. During the ice-free period, the greatest contribution to abundance was made primarily by pool inhabitants (up to 57.7 %), whereas the role of the riffle increased (up to 63.6 %) during periods of freezing (November-February). From July to October, biomass in both the pool and riffle was low, while in the run it showed wide variation. In November and January-February, a general increase in this parameter was observed.
