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biogeoch@ocean.ru

Biogeochemical Assessment of Shallow Sea Environments (White Sea, Russian Arctic) S. Koukina, G. Korneeva, L. Ametistova and T. Bek P.P. Shirshov Institute of Oceanology. biogeoch@ocean.ru. Laptev sea. Kara sea. Barents sea. Pechora sea. Russia. White sea. Russian Arctic. Russia.

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biogeoch@ocean.ru

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  1. Biogeochemical Assessment of Shallow Sea Environments (White Sea, Russian Arctic) S. Koukina, G. Korneeva, L. Ametistova and T. Bek P.P. Shirshov Institute of Oceanology biogeoch@ocean.ru

  2. Laptev sea Kara sea Barents sea Pechora sea Russia White sea Russian Arctic Russia

  3. The White sea of Russian Arctic • the inner sub-Arctic sea • extreme diversity of enclosed estuarine systems • unique biota

  4. The Kandalaksha Bay of the White sea • wide estuary with evenly distributed fresh water discharge • contains a continuum of shallow sea environments

  5. Location of sampling stations

  6. Sampling 18 surface sediment samples were collected in June 2000

  7. Geochemical TOC, TON, TS, TP, TOC:TON total metals (Al, Fe, Mn, Co, Cu, Ni, Cr, Cd, Li, Zn, Pb) Biochemical enzymatic (amylase and protease) activities express enzymatic test-systems Study parameters

  8. Russian Arctic Laptev sea Kara sea Barents sea Pechora sea Whitesea

  9. Mean TOC and metal contents (to nearest gg –1)in the surficial fine-grained sediments from the Karelian shore and those found in the White sea and Russian Arctic sediments

  10. found values are below the threshold levels according to the sediment quality guidelines there is no major anthropogenic source of Zn and Cr some rock-building minerals of the area may concentrate Zn and Cr found disparities are related to natural differences in sediment compositions Elevated Zn and Cr levels in Karelian shore sediments: anthropogenic or natural?

  11. Sediment quality assessment by an express test with azocasein-trypsin 10 h Chernorechenskaya Poyakonda Rugozerskaya Azocasein turn-over period (h) Griaznaya Ermolinskaya Podvolochie station number

  12. dynamic index of organic matter decomposition rate largely controlled by the sediment granulometry Enzymatic activities in Karelian shore sediments amylolytic activity, EU proteolytic activity, EU Poyakonda Chernorechenskaya Ermolinskaya Podvolochie Rugozerskaya Griaznaya

  13. Erm Rug Gri Pod Poy Che Trace element distribution in the Karelian shore sediments TOC content (%) element content (mg/kg)

  14. The present study has shown that local hydrodynamic situation predisposes geochemical and biological patterns of the environment and thus possesses considerable ecological relevance. Comprehensive biogeochemical approach exercised in the current research provides valuable information on grounds state of health and can thus serve as a basis of objective environmental assessment of a region. Conclusions

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