References
- Bayley, S.E. & Prather C.M. (2003). Do wetland lakes exhibit alternative stable states? Submersed aquatic vegetation and chlorophyll in western boreal shallow lakes. Limnol. Oceanogr., 48, 2335-2345. DOI: 10.4319/lo.2003.48.6.2335
- Boińska, U. & Boiński M. (1993). Vegetation of the nature reserve “Piecki” (in Polish). Acta Univ. Nicolai Copernici, 44, 123-143.
- Braun-Blanquet, J. (1951). Phytosociology (in German). Wien: Springer Verlag.
- Brzeg, A. & Wojterska M. (2001). Vegetation of the Wielkopolska region, their state of knowledge and vulnerability (in Polish). In M. Wojterska (Ed.), Plant cover of the Wielkopolska region and South-Pomeranian Lake District (pp. 39-110). Poznań: Bogucki Wyd. Nauk.
- Chmiel, S. (2009). Hydrochemical evaluation of dystrophy of the water bodies in the Łęczna and Włodawa area in the years 2000-2008. Limnological Review, 9, 153-158.
- Fijałkowski, D. (1959). Plant associations of lakes situated between Łęczna and Włodawa and of peat-bogs adjacent to these lakes (in Polish). Annales UMCS, sec. B, 14, 131-204.
- Gąbka, M. & Owsianny P.M. (2006). Shallow humic lakes of the Wielkopolska region - relation between dystrophy and eutrophy in lakes ecosystems. Limnological Review, 6, 95-102.
- Gąbka, M, Owsianny, P.M. & Sobczyński T. (2007). Comparison of the habitat conditions of peat-moss phytocoenoses dominated by Eriophorum angustifolium Honck. or Carex rostrata Stokes from mires in Western Poland. Biodiversity: Research and Conservation, 5-8, 61-69.
- GDOŚ (Generalna Dyrekcja Ochrony Środowiska) (2010). Data base of the European Ecological Natura 2000 Network. - Data available at http://natura2000.gdos.gov.pl/natura2000/. Accessed January 2012.
- Górniak, A. (1996). Humic substances and their role in functioning of freshwater ecosystems (in Polish). Dissertationes Universitatis Varsoviensis, Białystok.
- Górniak, A. (Ed.) (2006). The lakes of the Wigry National Park. The current quality and trophy of waters (in Polish). Białystok: Wydawnictwo Uniwersytetu w Białymstoku.
- Hansen, K. (1962). Dystrophic lake type. Hydrobiologia, 19, 183-190. DOI: 10.1007/BF00146361.
- Harasimiuk, M. & Wojtanowicz J. (1998). Geological structure and relief of the Łęczna-Włodawa Lake District (in Polish). In M. Harasimiuk, Z. Michalczyk & M. Turczyński(Eds.), Lakes of Łęczna-Włodawa region. Nature monograph (pp. 41-53). Lublin: Biblioteka Monitoringu Środowiska.
- Höll, K. (1928). Ecology of the Peridiniales (in Germany). Pflanzenforschung, 11, 1−105.
- Hutorowicz, A. (2001). Phytoplankton of the humic lake Smolak against a background physico-chemical changes caused by liming and fertilization (in Polish). Idee Ekologiczne, 14(7).
- IOŚ (Instytut Ochrony Środowiska) (2010). Monitoring of plant species and nature habitats with taking Natura 2000 special areas of conservation under consideration. Data available at http://www.iop.krakow.pl/cn2000/Monitoring/. Accessed January 2012.
- Iversen, J. (1929). Study of pH-conditions of Danish waters and their influence on aquatic vegetation (in German). Botanisk Tiddskrift, 40, 277-333.
- Jones, R.I. (1992). The influence of humic substances on lacustrine food chains. Hydrobiologia, 229, 73-91. DOI: 10.1007/ BF00006992.
- Juday, C. & Birge E.A. (1932). Dissolved oxygen and oxygen consumed in the lake waters of Northeastern Wisconsin. Trans. Wis. Acad. Sci., 27, 415-485.
- Karczmarz, K. & Sokołowski A.W. (1988). Peat-bog vegetation of the nature reserve Lake Obradowskie in the Łęczna and Włodawa Lake District (in Polish). Ann. UMCS, sec. C, 43, 103-117.
- Kłosowski, S. (1985). Habitat conditions and bioindicator value of the main communities of aquatic vegetation in northeast Poland. Pol. Arch. Hydrobiol., 32, 7-29.
- Kondracki, J. (2002). Geography of Polish regions (in Polish). Warszawa: Wyd. Nauk. PWN.
- Kononova, M.M. (1961). Soil organic matter. Oxford: Pergamon Press.
- Kortelainen, P. (1993). Content of total organic carbon in Finnish lakes and its relationship to catchment characteristics. Can. J. Fish. Aquat. Sci., 50, 1477-1483. DOI: 10.1139/f93-168.
- Kovach, W. (1986-1999). Multi-Variate Statistical Package, ver. 3.1. Pentraeth.
- Kraska, M., Borysiak, J., Danielak, K., Domek, P., Gołdyn, R., Joniak, T., Klimaszyk, P., Kujawa-Pawlaczyk, J., Piotrowicz, R., Radziszewska, R., Romanowicz, W., Szeląg-Wasilewska, E. & Szyper H. (2001). Dystrophic lakes and meromictic lake in Drawa National Park (in Polish). In Plant cover of the Wielkopolska region and South-Pomeranian Lake District (pp. 371-400). Poznań: Bogucki Wyd. Nauk.
- Lorens, B. (2009). Analysis of successional changes in plant communities and flora of selected peat bogs in 1960-2009.
- In T.J. Chmielewski (Ed.), Ecology of hydrogenic landscapes in biosphere reserve “Polesie Zachodnie” (pp. 191-206). Lublin.
- Matuszkiewicz, W. (2001). Guidebook for determination of plant communities in Poland (in Polish). Warszawa: Wyd. Nauk. PWN.
- Nürnberg, G.K. & Shaw M. (1999). Productivity of clear and humic lakes: nutrients, phytoplankton, bacteria. Hydrobiologia, 382, 97-112. DOI: 10.1023/A:1003445406964.
- Ohle, W. (1934). The study of chemical and physical properties of lakes in Northern Germany (in German). Arch. Hydrobiol., 26, 386-653.
- Owsianny, P.M. & Gąbka M. (2007). Characeae- and dystrophic waters - identification features in the light of Natura 2000 Program and some cases from the Pilskie forests. Stud. Mat. CEPL, 2/3, 584-600.
- Paszek, I., Iglińska, A., Kubiak-Wójcicka, K., Kołybski, W., Ładziński, R., Kosowicz, M. & Koziński G. (2011a). Nature reserve “Okonek”. Kujawsko-pomorskie Province, Brodnica District, Zbiczno Municipality. Protection plan for the period 1.01.2012-31.12.2031. Bydgoszcz: “Vitis” Iwona Paszek.
- Paszek, I., Iglińska, A., Kubiak-Wójcicka, K., Kołybski, W., Ładziński, R., Kosowicz, M. & Koziński G. (2011b). Nature reserve “Stręszek”. Kujawsko-pomorskie Province, Brodnica District, Zbiczno Municipality. Protection plan for the period 1.01.2012-31.12.2031. Bydgoszcz: “Vitis” Iwona Paszek.
- Pęczuła, W. (2002). Lake Płotycze - between eutrophy and dystrophy (about difficulties in obtaining trophic status of some lakes). Limnological Review, 2, 303-311.
- Piotrowicz, R., Kraska, M., Klimaszyk, P., Szyper, H. & Joniak T. (2006). Vegetation richness and nutrient loads in 16 lakes of Drawieński National Park (Northern Poland). Pol. J. Environ. Stud., 15, 467-478.
- Poniewozik, M., Wojciechowska, W. & Solis M. (2011). Dystrophy or eutrophy: phytoplankton and physicochemical parameters in the functioning of humic lakes. Oceanological and Hydrobiological Studies, 40, 22-29. DOI: 10.2478/ s13545-011-0013-8.
- Reinikainen, J. & Hyvärinen H. (1997). Humic- and fulvic-acid stratigraphy of the Holocene sediments from a small lake in Finnish Lapland. The Holocene, 7, 401-407. DOI: 10.1177/095968369700700403.
- Rejewski, M. (1981). Vegetation of lakes near Laska in the Bory Tucholskie region (in Polish). Toruń: Uniwersytet Mikołaja Kopernika.
- Rodwell, J.S. (Ed.) (1991). British plant communities. Mires and heaths. Cambridge University Press.
- Scheffer, M., Hosper, S.H., Meijer, M.L., Moss, B. & Jeppesen E. (1993). Alternative equilibria in shallow lakes. Trends Ecol. Evol., 8, 275-279.
- Sender, J. (2008). Long term changes of macrophytes structure in the lake Moszne (Poleski National Park). Teka Kom. Ochr. Kszt. Środ. Przyr., 5, 154-163.
- Sender, J. (2009). Analysis of successional changes in aquatic plant communities and macrophyte flora of selected lakes in 1960-2009. In T.J. Chmielewski (Ed.), Ecology of hydrogenic landscapes in biosphere reserve “Polesie Zachodnie” (pp. 161-190). Lublin.
- Sobek, S., Tranvik, L.J., Prairie, Y.T., Kortelainen, P. & Cole J.J. (2006). Patterns and regulation of dissolved organic carbon: An analysis of 7,500 widely distributed lakes. Limnol. Oceanogr., 52, 1208-1219.
- Sobotka, D. (1967). Vegetation of the overgrowth zone in lakes that have not natural outflow in the Suwałki region (in Polish). Monogr. Bot., 23, 173-258.
- Sokal, R.R. & Rohlf F.J. (1995). Biometry. New York: W.H. Freeman and Company Sugier, P. & Popiołek P. (1999). Differentiation of aquatic and bank vegetation of Długie Lake in the Polesie National Park. Parki Nar. Rez. Przyr., 18, 61-79.
- Thienemann, A. (1921). Types of lakes (in German). Naturwissenschaften, 18, 343-346.
- Urban, D. (2001). Values of nature and problems of protection in the nature reserve Jezioro Orchowe (Łęczna-Włodawa Lake District). Inż. Ekol., 5, 150-157.
- Wiszniewski, J. (1953). Remarks about lake types in Poland (in Polish). Pol. Arch. Hydrobiol., 1, 11-23.
- Wojciechowska, W. & Solis M. (2009). Prokaryotic and eukaryotic algae in the lakes of Łęczna-Włodawa Lake District (in Polish). Lublin: Wydawnictwo KUL.
- Wojciechowski, I. (1999). Functioning conditions of peat bog and aquatic-peat bog ecosystems in Poland (in Polish). In S. Radwan & R. Kornijów (Eds.), Problems of active protection of aquatic and peat bog ecosystems in national parks in Poland (pp. 57−63). Lublin: Wyd. UMCS.
- Załuski, T. (1996). Kociołek (in Polish). In M. Rejewski & P. Bielecki (Eds.), Nature reserves in Toruń Province (pp. 109−111). Toruń: UW w Toruniu, Wydz. Ochr. Środ., Woj. Konserw. Przyr.