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[Protist plankton from the Khanka lake]
1Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia.
Izvestiia Akademii Nauk. Seriia Biologicheskaia
|June 27, 2000
Summary
Studies in Lake Khanka revealed 99 protist species, with abundant bacterivorous protists indicating significant bacterial production. High protist density suggests an additional organic matter source beyond limited phytoplankton due to turbidity.
Area of Science:
- Limnology
- Protistology
- Microbial Ecology
Context:
- Lake Khanka is a high-productivity freshwater reservoir.
- Protists play a crucial role in aquatic food webs.
- Understanding protist communities is vital for assessing ecosystem health.
Purpose:
- To document the species composition and abundance of protists in Lake Khanka.
- To investigate the ecological role of protists, particularly bacterivores.
- To infer organic matter sources based on protist community structure.
Summary:
- A survey of Lake Khanka identified 99 protist species, including phytoflagellates, zooflagellates, sarcodines, heliozoans, infusoria, and suctorians.
- Small infusoria (Kinetophragminophora, Oligotrichida, Tetrahymenina) were most numerous.
- High densities of bacterivorous protists suggest substantial bacterial plankton production, potentially supported by an unmeasured organic matter source due to high water turbidity limiting phytoplankton production.
Impact:
- The findings highlight the importance of bacterivory in Lake Khanka's ecosystem.
- Abundant protists suggest alternative organic matter sources are significant.
- This research contributes to understanding microbial dynamics in turbid freshwater environments.