Contemporary trends of temperature, nutrient loading, and water quality in large Lakes Peipsi and Võrtsjärv, Estonia
Keywords:
surface water temperature, nutrients, longterm trendsAbstract
From 1961–2004, surface water temperature in large and shallow Lakes Peipsi and Võrtsjärv in Estonia increased significantly in April and August; respectively 0.37–0.75 and 0.32–0.42 degrees per decade reflecting the changes in air temperature. The average annual amount of precipitation in the catchment increased significantly. Reflecting practices in agriculture and wastewater treatment, nutrient loadings to the lakes increased rapidly in the 1980s and decreased again in the early 1990s. As total nitrogen (TN) loading decreased faster than total phosphorus (TP) loading, the TN/TP ratio in the loadings decreased. Both the increased temperature and low TN/TP ratio favoured the development of cyanobacteria blooms in Lake Peipsi. In Võrtsjärv, where the TN/TP mass ratio is about two times higher than in Peipsi, blooms did not occur. Recently, the TN/TP ratio has shown a tendency of increase in both lakes suggesting a certain reduction of blooms to be expected also in Lake Peipsi. Nutrient dynamics in the lakes followed the changes in loadings, showing the ability of shallow lake ecosystems to react sensitively to changes in catchment management as well as in climate.
References
Arhonditsis, G. B., Brett, M. T., DeGasperi, C. L. and Schindler, D. E. 2004. Effects of climatic variability on the thermal properties of Lake Washington. Limnology and Oceanography, 49: 256–270.
Blinova, I. 2001. “Water quality and pollution load of the rivers of L. Peipsi basin. Riverine load into the L. Peipsi”. In Lake Peipsi. Meteorology, Hydrology, Hydrochemistry, Edited by: Nõges, T. 94–96. Tallinn, Estonia: Sulemees Publishers.
Coats, R., Perez-Losada, J., Schladow, G., Richards, R. and Goldman, C. 2006. The warming of Lake Tahoe. Climatic Change, 76: 121–148.
Dokulil, M. T., Jagsch, A., George, G. D., Anneville, O., Jankowski, T., Wahl, B., Lenhart, B., Blenckner, T. and Teubner, K. 2006. Twenty years of spatially coherent deepwater warming in lakes across Europe related to the North Atlantic Oscillation. Limnology and Oceanography, 51: 2787–2793.
Genkai-Kato, M. and Carpenter, S. R. 2005. Eutrophication due to phosphorus recycling in relation to lake morphometry, temperature, and macrophytes. Ecology, 86: 210–219.
Grasshoff, K., Ehrhardt, M. and Kremling, K., eds. 1983. Methods of Seawater Analysis., Weinheim: Verlag Chemie.
Hari, R. E., Livingstone, D. M., Siber, R., Burkhardt-Holm, P. and Güttinger, H. 2006. Consequences of climatic change for water temperature and brown trout populations in Alpine rivers and streams. Global Change Biology, 12: 10–26.
Heinsalu, A., Alliksaar, T., Leeben, A. and Nõges, T. 2007. Sediment diatom assemblages and composition of pore-water dissolved organic matter reflect recent eutrophication history of Lake Peipsi (Estonia/Russia). Hydrobiologia, 584: 133–143.
Jaani, A. 2001. “The location, size and general characterization of Lake Peipsi”. In Lake Peipsi. Meteorology, Hydrology, Hydrochemistry, Edited by: Nõges, T. 10–17. Tallinn, Estonia: Sulemees Publishers.
Järvet, A. 2001. “Long-term changes of nutrient runoff in a Lake Võrtsjärv catchment area”. In Environmental Impact and Water Management in a Catchment Area Perspective, Edited by: Seepõld, M. 54–62. Tallinn, Estonia: Tallinn Technical University.
Järvet, A., Mander, Ü., Kull, A. and Kuusemets, V. 2002. Nutrient runoff change in a rural catchment in South Estonia Large Rivers. Archiv für Hydrobiology, Supplement, 141: 305–319.
Jeppesen, E., Jensen, J.-P., Søndergaard, M. and Lauridsen, T. L. 2005a. Response of fish and plankton to nutrient loading reduction in eight shallow Danish lakes with special emphasis on seasonal dynamics. Freshwater Biology, 50: 1616–1627.
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., Portielje, R., Romo, S., Schelske, C. L., Straile, D., Tatrai, I., Willen, E. and Winder, M. 2005b. Lake responses to reduced nutrient loading—an analysis of contemporary long-term data from 35 case studies. Freshwater Biology, 50: 1747–1771.
Jöhnk, K. D., Huisman, J., Sommeijer, B., Sharples, J., Visser, P. M. and Stroom, J. 2008. Summer heatwaves promote blooms of harmful cyanobacteria. Global Change Biology, 14: 495–512.
Juhna, T. and Klavins, M. 2001. Water-Quality Changes in Latvia and Riga 1980–2000: Possibilities and Problems. Ambio, 30: 306–314.
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.
Kangur, A., Kangur, P., Kangur, K. and Möls, T. 2007. The role of temperature in the population dynamics of smelt Osmerus eperlanus eperlanus m. spirinchus Pallas in Lake Peipsi (Estonia/Russia). Hydrobiologia, 584(1): 433–441.
Kronvang, B., Jeppesen, E., Conley, D. J., Søndergaard, M., Larsen, S. E., Ovesen, N. B. and Carstensenc, J. 2005. Nutrient pressures and ecological responses to nutrient loading reductions in Danish streams, lakes and coastal waters. Journal of Hydrology, 304: 274–288.
Kundzewicz, Z. W. and Robson, A. J. 2004. Change detection in hydrological records—a review of the methodology. Hydrological Sciences Journal, 49: 7–19.
Laugaste, R., Nõges, T., Nõges, P., Jastremskij, V. V., Milius, A. and Ott, I. 2001. “Algae”. In Lake Peipsi. Flora and Fauna, Edited by: Pihu, E. and Haberman, J. 31–49. Tallinn, Estonia: Sulemees Publishers.
Livingstone, D. M. 2003. Impact of secular climate change on the thermal structure of a large temperate central European lake. Climatic Change, 57: 205–225.
Loigu, E. and Leisk, Ü. 1996. Water quality of rivers in the drainage basin of Lake Peipsi. Hydrobiologia, 338: 25–35.
Loigu, E., Leisk, Ü., Iital, A. and Pachel, K. 2008. “Peipsi järve valgla reostuskoormus ja jõgede veekvaliteet (Pollution load of the Lake Peipsi catchment and river water quality. In Estonian.)”. In Peipsi, Edited by: Haberman, J., Timm, T. and Raukas, A. 179–199. Tartu, Estonia: Eesti Loodusfoto.
Mühlen von zur, M. and Schneider, G. 1920. Der See Wirzjerw in Livland. (Lake Võrtsjärv in Livland. In German). Archiv für die Naturkunde des Ostbaltikums, 14: 1–156.
Nõges, T. 2009. Trends of air and water temperature in Estonia and in large lakes Peipsi and Võrtsjärv, and possible consequences on water quality. Stuttgart Verhandlungen der Internationalen Vereinigung für Theoretische und Angewandte Limnologie, 30(7): 997–999.
Nõges, P. and Järvalt, A. 2004. “Long-term changes in the ecosystem of Lake Võrtsjärv and their causes”. In Lake Võrtsjärv, Edited by: Haberman, J., Pihu, E. and Raukas, A. 347–355. Tallinn, Estonia: Estonian Encyclopaedia Publishers.
Nõges, P. and Järvet, A. 2005. Climate driven changes in the spawning of roach (Rutilus rutilus (L.)) and bream (Abramis brama (L.)) in the Estonian part of the Narva River basin. Boreal Environmenatl Research, 10: 45–55.
Nõges, T., Järvet, A., Laugaste, R., Loigu, E., Tõnno, I. and Nõges, P. Current State and Historical Changes of Nutrient Loading and Ecological Status of Large Lakes Peipsi and Võrtsjärv. Proceedings of 4th International Lake Ladoga Symposium 2002 September 2–6 Russia University of Joensuu, Finland. Edited by: Simola, H., Yu Terzhevik, A., Viljanen, M. and Holopainen, I. K. pp.199–203.
Nõges, T., Nõges, P. and Laugaste, R. 2003b. Water level as the mediator between climate change and phytoplankton composition in a large shallow temperate lake. Hydrobiologia, 506(1): 257–263.
Nõges, T., Järvet, A., Laugaste, R., Loigu, E., Leisk, Ü., Tõnno, I. and Nõges, P. 2005. “Consequences of catchment processes and climate changes on the ecological status of large shallow temperate lakes”. In Aquatic ecosystems, conservation, restoration and management, Edited by: Ramachandra, T. V., Ahalya, N. and Murthy, C. R. 88–99. New Dehli, Kolkata, Bangalore: Capital Publishing Company.
Nõges, P., Kägu, M. and Nõges, T. 2007. Role of climate and agricultural practice in determining the matter discharge into large shallow Lake Võrtsjärv, Estonia. Hydrobiologia, 581: 125–134.
Nõges, T., Järvet, A., Kisand, A., Laugaste, R., Loigu, E., Skakalski, B. and Nõges, P. 2007. Reaction of large and shallow lakes Peipsi and Võrtsjärv to the changes of nutrient loading. Hydrobiologia, 584: 253–264.
Nõges, T., Laugaste, R., Nõges, P. and Tõnno, I. 2008. Critical N:P ratio for cyanobacteria and N2-fixing species in the large shallow temperate lakes Peipsi and Võrtsjärv, North-East Europe. Hydrobiologia, 599: 77–86.
Nõges, P., Nõges, T., Adrian, R. and Weyhenmeyer, G. A. 2008. Silicon load and the development of diatoms in three river-lake systems in countries surrounding the Baltic Sea. Hydrobiologia, 599: 67–76.
Paerl, H. W. and Huisman, J. 2008. Blooms like it hot. Science, 320: 57–58.
Straile, D., Jöhnk, K. and Rossknecht, H. 2003. Complex effects of winter warming on the physicochemical characteristics of a deep lake. Limnology and Oceanography, 48: 1432–1438.
Weyhenmeyer, G. A., Meili, M. and Livingstone, D. M. 2005. Systematic differences in the trend towards earlier ice-out on Swedish lakes long a latitudinal temperature gradient. Verhandlungen des Internationalen Verein Limnologie, 29: 257–260.
World Meteorological Organisation (WMO). 1994. Guide to Hydrological Practices, , Fifth edition, Geneva: World Meteorological Organization. WMO Publication No. 168
WMO. 2008. Guide to Meteorological Instruments and Methods of Observation, , Seventh edition, Geneva: World Meteorological Organization. WMO-No. 8
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