vol. 51 (2) 2003

pages	Articles
117-128	Rotifera of lake psammon: community structure versus trophic state of lake waters Tadeusz J. Chmielewski	Abstract
129-136	Influence of land-lake ecotone on mineral and organic compounds in groundwater and lake water Modest Misztal, Halina Smal, Sławomir Ligęza, Paulina Dymińska-Wydra	Abstract
137-142	Effect of land-water ecotone on changes in heavy metal content in waters of agricultural area Barbara Szpakowska, Bogdan Karlik, Hanna Gołdyn	Abstract
143-154	Precipitation of phosphorus in the zone of river and lake water mixing: r. Hańcza and Lake Wigry (North-East Poland) Bogusław Zdanowski	Abstract
155-162	Selected physical and chemical factors in the ecotone zones of lakes of different trophy in the region of Polesie Lubelskie (Estern Poland) Stanisław Radwan, Barbara Stępień, Wiktor Bojar	Abstract
163-174	River-lake system as mosaic pattern of landscape patches and their transition zones (ecotones) Anna Hillbricht-Ilkowska and Teresa Węgleńska	Abstract
175-182	Changes in vegetation of restored water-land ecotone of Lake Bikcze (Polesie Lubelskie region, Eastern Poland) in the years 1993–1998 Bogdan Lorens, Tadeusz Grądziel, Piotr Sugier	Abstract
183-194	Phytopsammon and phytoplankton of land/water ecotone of mesotrophic lake in the Polesie region (Eastern Poland) Krzysztof Czernaś, Danuta Krupa	Abstract
195-204	Composition of invertebrate communities in ecotones of several lakes in the region of Polesie Lubelskie (Eastern Poland) Stanisław Radwan, Andrzej Paleolog	Abstract
205-218	Temporal and spatial changes in the horizontal distribution of planktonic Crustacea between vegetated littoral zone and the zone of open water Jan Igor Rybak, Teresa Węgleńska	Abstract
219-224	Is sandy beach of the lake an ecotone? Psammon Rotifera in a mesotrophic Lake Kuc (Masurian Lakeland, Northern Poland) Jolanta Ejsmont-Karabin	Abstract
225-236	Rotifer communities of ecotones in six trophically different lakes of Polesie Lubelskie region (Eastern Poland) Stanisław RADWAN, Irena BIELAŃSKA-GRAJNER, Barbara POPIOŁEK, Andrzej PALEOLOG	Abstract
237-246	Zoobenthos of ecotonal zones in several lakes of different trophic status (the region Polesie Lubelskie, Eastern Poland) Ryszard Kornijów, Stanisław Radwan, Monika Tarkowska-Kukuryk, Grzegorz Kahlan	Abstract
247-254	Biogeochemical multifunctionality of wetland ecotones in lakeland agricultural landscape Source: Polish Journal of Ecology Marek Kruk	Abstract
255-260	Hydrochemical distinction and function of ecotone between Sphagnum bog and agricultural watershed Marek Kruk, Katarzyna Podbielska, Joanna Duriasz	Abstract