Long-Term Changes of Aquatic Communities in the Kharbeyskie Lakes
Kharbeyskie Lakes situated on the North-East of the European Russia were sampled. The aim of the present work was to evaluate the changes in the lakes ecosystems which took place during more than 40 years since the first sampling in 1960’s. Faunal richness of aquatic communities changed insignifican...
| Main Authors: | , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English Russian |
| Published: |
Siberian Federal University
2014
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| Subjects: | |
| Online Access: | https://doaj.org/article/ceeda8585b714f4c8d8a3335e5793258 |
| Summary: | Kharbeyskie Lakes situated on the North-East of the European Russia were sampled. The aim of the present work was to evaluate the changes in the lakes ecosystems which took place during more than 40 years since the first sampling in 1960’s. Faunal richness of aquatic communities changed insignificantly under warming climate and low anthropogenic impacts. Nevertheless, the following changes in zooplankton community of the lakes can be considered as the signs of their oligotrophication: the abundance of species indicating oligotrophic water has increased, the abundance of species indicating eutrophy has decreased, the crustacean role comparing the role of rotifers in zooplankton in quantitative terms has grown, faunal coefficients of trophy (E, E/O) have reduced. According to the structural characteristics of zooplankton the large Kharbeyskie lakes are oligotrophic at present. Zoobenthos is more inert community than zooplankton under influence of environmental changes. According to the data on zoobenthic abundance, biomass, composition and structure, the Kharbeyskie Lakes are mesotrophic ecosystems as well as they were in 1968 and 1969. Some dynamic features of the studied aquatic communities indicate a warming influence on the ecosystem of the Kharbeyskie Lakes in the 2000s. These include increasing of abundance and biomass of zooplankton, zoobenthos and some plankton and benthos taxa and the appearance of thermophilic and eutrofication indicating species in zooplankton |
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