Subtitle:

Jorka river-lake system - synthesis of the studies

Contributor:

Polish Academy of Sciences. Institute of Ecology

Publisher:

Polish Academy of Sciences. Institute of Ecology. Publishing Office

Place of publishing:

Dziekanów Leśny

Description:

Pages 543-550 ; 27 cm ; Bibliographical references (pages 549-550)

Type of object:

Journal/Article

Abstract:

The basic results and conclusions of multi-year studies (described in detail in previous papers) on the river-lake system in the lakeland region of north-eastern Poland are shortly presented in relation to the selected general ecological problems. The study area was proved to be representative of the mosaic landscape structure and of the river-lake system as a trophic continuum with the spatial pattern of human impact established a century ago. Generally low export rates of nutrients and relatively low input to the lakes were found as typical of the region. However, year-to-year variation in nutrient export from the lake watersheds was high, mostly related to the discharge variation, and highest in the vernal period; the highest values were found for polluted fragments of the watershed. The long-term relative stability of in-lake trophic conditions was found and their basic relation to the lake position in the river system. The role of wetlands (isolated patches and the zones close to lakes) in diminishing the nutrient input was proved and their vegetation was described. Some consequences of the possible global warming and decrease in discharge and water table in the region were pointed out, such as the pulsing (concentrated in the freshet period) system of water and nutrient supplying, sink or source function of lakes in the river system (positive or negative nutrient retention in successive lakes), change in eutrophication rate, and its symptoms. The main implications for watershed management in the lakeland region are indicated.

References:

Andrzejewski R. 2002 – Ważne kierunki badań ekologicznych w Polsce [The ecological research problems important in Poland] - Nauka 1 : 93-97. (in Polish)
Boon P. J., Calow P. , Petts G. (Eds) 1997 - River conservation and management. - John Wiley & Sons Ltd.
Cushing E. K., Cummins W., Minshall G. (Eds). 1995 - River and stream ecosystems. – Ecosystems of the World 22. Elsevier, Amsterdam
Directive 2000/60/EC of the European Parliament and of the Council. 23 October 2000 establishing a framework for Community action in the field of water policy. - Official J. European Community L 32711 pp.60.
Forman R. T., Godron M. 1986 - Landscape ecology. - John Wiley & Sons, New York , 618 pp.
Haycock N. E., Burt T. P., Goulding K. V., Pinay G. 1997 - Buffer zones: their processes and potential in water protection. - Quest International, UK, 322 pp.
Hillbricht-Ilkowska A. 1999a - Shallow lakes in lowland river systems: role in transport and transformations of nutrients and biological diversity - Hydrobiologia, 408/409: 349-358.
Hillbricht-Ilkowska A.1999b - Jezioro w krajobrazie - związki ekologiczne, wnioski dla ochrony [Lake and landscape - ecological protection, protection measures] (In: "Funkcjonowanie i ochrona ekosystemów wodnych na obszarach chronionych" [Aquatic ecosystems in protected areas], Eds: B. Zdanowski, M. Kamiński, M. Martyniak) - Publ. Inst. Inland Fisheries 19-40. (in Polish).
Hillbricht-Ilkowska A. 2002a. - Links between landscape, catchment basin, wetland and lake: the Jorka river-lake system (Masurian Lakeland, Poland) as the study object - Pol. J. Ecol. 50 : 411-425.
Hillbricht-Ilkowska A. 2002b. - Nutrient loading and retention in lakes of the river Jorka system (Masurian Lakeland, Poland): seasonal and longterm variation - Pol. J. Ecol. 50: 459-474.
Hillbricht-Ilkowska A. 2002c - Eutrophication rate of lakes in the Jorka river system (Masurian Lakeland, Poland): long-term changes and trophic correlations -Pol. J. Ecol. 50: 475-487.
Junk W. J. (Ed.) 1997 - The Central Amazon floodplain - ecology of the pulsing system. - Springer Verlag, Berlin.
Klass M., Wilpiszewska I. 2002 - Diversity, disturbance and spatial structure of wetland vegetation along a lake shore: Jorka river-lake system (Masurian Lakeland, Poland) - Pol. J. Ecol. 50: 489-513.
Kratz T., Webster K., Bowser C. J., Magnuson J. J., Benson B. J. 1997 - The influence of landscape on lakes in Northern Wisconsin - Freshwater Biology 37: 209-217.
Międzynarodowy Związek Organizacji Zlewniowych (International Network of Basin Organization). 2002 - Gosp. Wodna 1: 8-12.
Mitsch W. J., Horne A. J., Nairn R. W. 2000 - Nitrogen and phosphorus retention in wetlands ecological approach to solving excess nutrient problems - Ecol. Eng. 14: 1-7.
Rybak J. 2002a - Landscape structure (patch pattern) of the Jorka river catchment (Masurian Lakeland, Poland): analysis of air photos - Pol. J. Ecol. 50: 427-438.
Rybak J. 2002b. - Seasonal and long-term export rates of nutrients with surface runoff in the river Jorka catchment basin (Masurian Lakeland, Poland). - Pol. J. Ecol. 50: 439-458.
Rzepecki M. 2002 - Wetland zones along lake shores as the barier systems: field and experimental research on nutrient retention and dynamics - Pol. J. Ecol. 50: 527-541.
Schindler D. W. 1997 - Widespread effects of climate warming on freshwater ecosystems in North America. - Hydrological Processes 11: 1043-1067.
Soranno P. A., Webster K. F., Riera J. A., Kratz T. K., Baron J. S., Bukaveckas P. A., Kling G. W., White D. V., Caine V., Lothrop C. , Leavitt P. A. 1999 - Spatial organization among lakes with landscape: ecological organization along lake chain. - Ecosystems 2: 295-410.
Wilpiszewska I., Kloss M. 2002 - Wetland patches (potholes) in a mosaic landscape (Masurian Lakeland, Poland): floristic diversity and disturbances. - Pol. J. Ecol. 50: 515-525.
Wolfram K. 2000 - Zielone Płuca Polski [Green Lungs of Poland ] (In: "Ochrona przyrody i środowiska w Polsce [Natural protection and environment in Poland]. - Publ. by Liga Ochrony Przyrody (in Polish).

Relation:

Polish Journal of Ecology

Volume:

50

Issue:

4

Start page:

543

End page:

550

Detailed Resource Type:

Article

Resource Identifier:

oai:rcin.org.pl:121290 ; ISSN 1505-2249

Source:

MiIZ PAN, call no. P.2840 ; click here to follow the link

Language:

eng

Language of abstract:

Rights:

Creative Commons Attribution BY 3.0 PL license

Terms of use:

Copyright-protected material. [CC BY 3.0 PL] May be used within the scope specified in Creative Commons Attribution BY 3.0 PL license, full text available at: ; -

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Projects co-financed by:

Operational Program Digital Poland, 2014-2020, Measure 2.3: Digital accessibility and usefulness of public sector information; funds from the European Regional Development Fund and national co-financing from the state budget.

Access:

Open