The status of the southernmost part (Lake Pihkva) of large Lake Peipsi: A purification pond or polluter?

References

• Andronikova , I. N. 1996 . Structural-functional organisation of zooplankton in the lake ecosystems of different trophic types , St Petersburg : Nauka .
   Google Scholar
• Arvola , L. , Järvinen , M. and Tulonen , T. 2011 . Long-term trends and regional differences of phytoplankton in large Finnish lakes . Hydrobiologia , 660 : 125 – 134 .
   Web of Science ®Google Scholar
• Barreiro , A. , Guisande , C. , Maneiro , I. , Vergara , A. R. , Riveiro , I. and Iglesias , P. 2007 . Zooplankton interactions with toxic phytoplankton: some implications for food web studies and algal defense strategies of feeding selectivity behaviour, toxin dilution and phytoplankton population diversity . Acta Oecol. , 32 : 279 – 290 .
   Web of Science ®Google Scholar
• Blank , K. , Laugaste , R. and Haberman , J. 2010 . Temporal and spatial variation in the zooplankton:phytoplankton biomass ratio in a large shallow lake . Estonian J. Ecol. , 59 ( 2 ) : 99 – 115 .
   Google Scholar
• Blinova , I. 2001 . “ Riverine load into L. Peipsi ” . In Lake Peipsi: Meteorology, Hydrology, Hydrochemistry , Edited by: Nõges , T. 94 – 96 . Tartu : Sulemees Publishers .
   Google Scholar
• Carlson , R. E. 1977 . A trophic state index for lakes . Limnol. Oceanogr. , 22 ( 2 ) : 361 – 369 .
   Web of Science ®Google Scholar
• De Eyto , E . 2001 . Chydorus sphaericus as a biological indicator of water quality in lakes . Verh. Intern. Ver. Theor. Angew. Limnologie , 27 : 3358 – 3362 .
   Google Scholar
• Duggan , I. C. , Green , J. D. and Shiel , R. J. 2001 . Distribution of rotifers in North Island, New Zealand, and their potential use as bioindicators of lake trophic state . Hydrobiologia , 446/447 : 155 – 164 .
   Web of Science ®Google Scholar
• Gilbert , J. J. 1994 . Susceptibility of planktonic rotifers to a toxic strain of Anabaena flos-aquae . Limnol. Oceanogr. , 39 : 1286 – 1297 .
   Web of Science ®Google Scholar
• Gulati , R. D. 1983 . Zooplankton and its grazing as indicators of trophic status in Dutch lakes . Environmental Monitoring and Assessment , 3 : 343 – 354 .
   PubMedGoogle Scholar
• Haberman , J. and Künnap , H. 2002 . Mean zooplankter weight as a characteristic feature of an aquatic ecosystem . Proc. Estonian Acad. Sci. Biol. Ecol. , 51 : 26 – 44 .
   Google Scholar
• Haberman , J. and Laugaste , R. 2003 . On characteristics reflecting the trophic state of large and shallow Estonian lakes (L. Peipsi, L. Võrtsjärv) . Hydrobiologia , 506–509 : 737 – 744 .
   Web of Science ®Google Scholar
• Haberman , J. and Virro , T. 2004 . Zooplankton , Edited by: Haberman , J. , Pihu , E. and Raukas , A. A. 185 – 205 . Tallinn : Estonian Encyclopaedia Publishers . Lake Võrtsjärv
   Google Scholar
• Haberman , J. , Laugaste , R. and Blank , K. 2010 . Recent changes in large and shallow Lake Peipsi (Estonia/Russia): causes and consequences. Polish J . Ecology , 58 ( 4 ) : 645 – 662 .
   Web of Science ®Google Scholar
• Hofmann , W. and Höfle , M. G. 1993 . Rotifer population dynamics in response to increased bacterial biomass and nutrients: a mesocosm experiment . Hydrobiologia , 225/226 : 171 – 175 .
   Web of Science ®Google Scholar
• Jeppesen , E M. , Søndergaard Kronvang , B. , Jensen , J.-P , Svendsen , M and Lauridsen , T . 1999 . Lake and catchment in Denmark . Hydrobiologia , 395/396 : 419 – 432 .
   Web of Science ®Google Scholar
• Jeppesen , E. , Jensen , J.-P. , Søndergaard , M. , Lauridsen , T. and Landkildehus , F. 2000 . Trophic structure, species richness and biodiversity in Danish lakes: changes along phosphorus gradient . Freshwater Biology , 45 : 201 – 218 .
   Web of Science ®Google Scholar
• Jeppesen , E. , Søndergaard , M. , Jensen , J.-P. , Havens , K. E. , Anneville , O. , Carvalho , L. , Coveney , M. F. , Deneke , R. , Dokulil , M. T. , Foy , B. , Gerdeaux , D. , Hampton , S. E. , Kangur , K. , Köhler , J. , Hilt , S. , Lammens , E. H. H. R. , Lauridsen , T. L. , Manca , M. , Miracle , M. R. , Moss , B. , Nõges , P. , Persson , G. , Phillips , G. , Portelje , R. , Romo , S. , Schelske , C. L. , Straile , D. , Tatrai , I. , Willén , E. and Winder , M. 2005 . Lake responses to reduced nutrient loading – an analysis of contemporary long-term data from 35 case studies . Freshw. Biol. , 50 : 1747 – 1771 .
   Web of Science ®Google Scholar
• Kamjunke , N. , Benndorf , A. , Wilbert , C. , Opitz , M. , Kranich , J. , Bollenbach , M. and Benndorf , J. 1999 . Bacteria ingestion by Daphnia galeata in a biomanipulated reservoir: a mechanism stabilizing biomanipulation . Hydrobiologia , 403 : 109 – 121 .
   Web of Science ®Google Scholar
• Kangur , K. and Möls , T. 2008 . Changes in spatial distribution of phosphorus and nitrogen in large north-temperate lowland Lake Peipsi (Estonia/Russia) . Hydrobiologia , 599 : 31 – 39 .
   Web of Science ®Google Scholar
• Kangur , K. , Kangur , A. , Kangur , P. and Laugaste , R. 2005 . Fish kill in Lake Peipsi in summer 2002 as a synergistic effect of a cyanobacterial bloom, high temperature and low water level- Proceedings of the Estonian Academy of Sciences . Biology, Ecology , 54 : 67 – 80 .
   Google Scholar
• Kõiv , T. , Nõges , T. and Laas , A. 2011 . Phosphorus retention as a function of external loading, hydraulic turnover time, area and relative depth in 54 lakes and reservoirs . Hydrobiologia , 660 : 105 – 115 .
   Web of Science ®Google Scholar
• Lampert , W. 1992 . Zooplankton vertical migrations: implications for phytoplankton-zooplankton interactions . Arch. Hydrobiol. Beih. , 35 : 69 – 78 .
   Google Scholar
• Loigu , E. , Leisk , U. , Iital , A. and Pachel , K. 2008 . Peipsi järve valgla reostuskoormus ja jõgede veekvaliteet (Pollution load of the catchment of the L. Peipsi and water quality of rivers. In Estonian) , Edited by: Haberman , J. , Timm , T. and Raukas , A. Tartu : Peipsi, pp. 179–199. Eesti Loodusfoto .
   Google Scholar
• Nõges , P. and Nõges , T. 2006 . Indicators and criteria to assess ecological status of the large shallow temperate polymictic lakes Peipsi (Estonia/Russia) and Võrtsjärv (Estonia) . Boreal Environment Research , 11 : 67 – 80 .
   Web of Science ®Google Scholar
• Nõges , T. , Laugaste , R. , Loigu , E. , Nedogarko , I. , Skakalski , B. and Nõges , P. 2005 . Is the destabilisation of Lake Peipsi ecosystem caused by increased phosphorus loading or decreased nitrogen loading? . Water Sc. Techn. , 54 : 267 – 274 .
   Google Scholar
• Nõges , T. , Tuvikene , L. and Nõges , P. 2010 . Contemporary trends of temperature, nutrient loading, and water quality in large lakes Peipsi and Võrtsjärv, Estonia . Aquatic Ecosystem Health and Management , 13 ( 2 ) : 143 – 153 .
   Web of Science ®Google Scholar
• Pejler , B. 1983 . Zooplanktic indicators of trophy and their food . Hydrobiologia , 101 : 111 – 114 .
   Web of Science ®Google Scholar
• Rask , M. , Vuori , K-M. , Hämäläinen , H. , Järvinen , M. , Hellsten , S. , Mykrä , H. , Arvola , L. , Ruuhijärvi , J. , Jyväsjärvi , J. , Kolari , J. , Olin , M. , Salonen , E. and Valkeajärvi , P. 2011 . Ecological classification of large lakes in Finland: comparison of classification approaches using multiple quality elements . Hydrobiologia , 660 : 37 – 47 .
   Web of Science ®Google Scholar
• Rumjantsev , V. A. , Kondrat’ev , S. A. , Shmakova , M. V. , Basova , S. L. , Shilin , B. V. , Zhuravkova , O. N. and Savitskaya , N. V. 2005 . External nutrient load to Lake Peipsi complex and its response . Vodnoe khozyajstvo Rossii , 7 : 569 – 585 . in Russian
   Google Scholar
• SAS Institute . 2009 . SAS Online Doc, version 9.2 , Cary : SAS Institute Inc. .
   Google Scholar
• Stålnacke , P. , Sults , Ü. , Vasiliev , A. , Skakalsky , B. , Botina , A. , Roll , G. , Pachel , K. and Maltsman , T. 2002 . An assessment of riverine loads of nutrients to Lake Peipsi, 1995–1998 . Arch. Hydrol. , 141 : 437 – 457 .
   Google Scholar
• Tanner , R. , Kangur , K. , Spoof , L. and Meriluoto , J. 2005 . Hepatotoxic cyanobacterial peptides in Estonian fresh water bodies and inshore marine water . Proc. Estonian Acad. Sci. Biol. Ecol. , 54 : 40 – 52 .
   Google Scholar