1 / 28

NAROCH LAKES: features of functioning of ecosystems at present stage

NAROCH LAKES: features of functioning of ecosystems at present stage. A. Ostapenya. Research Laboratory of Hydroecology, Naroch Biological Station named after G.G.Vinberg. BSU , Minsk.

kristen-jacobs
Télécharger la présentation

NAROCH LAKES: features of functioning of ecosystems at present stage

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NAROCH LAKES: features of functioning of ecosystems at present stage A. Ostapenya Research Laboratory of Hydroecology, Naroch Biological Station named after G.G.Vinberg BSU, Minsk

  2. The Naroch Lakes consist of three connected lakes: Batorino, Miastro, and Naroch in Northwest Belarus

  3. Naroch lakes Мястро Нарочь Баторино

  4. General characteristics of the Naroch lakes

  5. Dynamics of total phosphorus in the lakes of Naroch group.

  6. Dynamics of chlorophyll concentration in the lakes of the Naroch group

  7. Dynamics of zooplankton biomass in the lakes of the Naroch group

  8. Dynamics of the Secchi depth in the lakes of the Naroch group.

  9. The cause of changes observed inNaroch lakes • Management of external nutrient flows (decrease of external nutrient loading) • Appearance in lakes powerful filtrator - Dreissena polymorpha • Decrease of intensity of economic activity

  10. Dynamics of the ratio of trophogenic/total lake volume in the Naroch lakes

  11. Dynamics of the ratio of trophogenic/total bottom area in the Naroch lakes

  12. L. NarochStanding crop of macrophytes

  13. L.NarochTotal GPP (plankton + macrophytes + mikrophytobenthos + epiphyton) in different periods

  14. L. NarochBiomassof zoobenthos before and afterDreissena polimorpha invade

  15. L. NarochBiomassof zoobenthos before and afterDreissena polimorpha invade

  16. Benthification “We define benthification as an increase in the importance of benthic processes following increased water clarity promoted by nutrient reduction and Dreissena introduction” Christine Mayer Lake Erie Center of the University of Toledo

  17. Dynamics of GPP/R ratio in Naroch Lakes

  18. Multiannual dynamics of GPP/R ratio, chlorophyll concentration, total nitrogen and phosphorus in the water samples of lake Miastro (values normalized to 1978)

  19. Multiannual dynamics of GPP/R ratio, chlorophyll concentration, total nitrogen and phosphorus in the water samples of lake Batorino (values normalized to 1978)

  20. Multiannual dynamics of GPP/R ratio, chlorophyll concentration, total nitrogen and phosphorus in the water samples of lake Naroch (values normalized to 1978)

  21. Dynamics of GPP/R ratio (%) in Naroch Lakes and the“forecast” this ratio for L. Naroch

  22. Correlation between GPP/R ratio and water level in lakes Naroch and Mjastro

  23. Partition of the assimmilation fluxes in L. Naroch(gС/m2veg. season) over the periods of1980-1985 and 2004-2009

  24. Naroch biological station in the past and in the present

  25. Naroch biological station

  26. Naroch biological station

  27. Thank you for your attention!

More Related