Russian Journal of Ecology

, Volume 33, Issue 5, pp 349–356 | Cite as

Activity of Beavers as an Ecological Factor Affecting the Zooplankton of Small Rivers

  • A. V. Krylov


The role of beavers in the transformation of small rivers is elucidated by analyzing the taxonomic and trophic structure of zooplankton in ponds differing in age, water flow rate, and the degree of overgrowing with higher aquatic plants. The building activity of beavers in the river system promotes the formation of biotopes of the ecotone type, in which the planktonic invertebrate community develops some features similar to or different from those of zooplanktonic communities from lakes and rivers undergoing anthropogenic eutrophication. The main distinctive feature of response to this activity in zooplankton is that its development reaches a plateau at the early and middle stages of succession, compared to that under conditions of anthropogenic eutrophication. For small rivers, the concept of zoogenic eutrophication (in addition to anthropogenic) is proposed.

small rivers eutrophication disturbances zooplankton taxonomic structure trophic structure 


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Copyright information

© MAIK “Nauka/Interperiodica” 2002

Authors and Affiliations

  • A. V. Krylov
    • 1
  1. 1.Papanin Institute of the Biology of Inland WatersRussian Academy of SciencesBorok, Nekouzsskii raion, Yaroslavl oblastRussia

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