vol. 51 (3) 2003

pages	Articles
269-281	Biocenotic function of the mid-field woodlots in West Poland: study area and research assumptions Lech Ryszkowski, Jerzy Karg, Zdzisław Bernacki	Abstract
283-290	Impact of young shelterbelts on organic matter content and development of microbial and faunal communities of adjacent fields Jerzy Karg, Anna Kajak, Lech Ryszkowski	Abstract
291-307	The impact of a shelterbelt on soil properties and microbial activity in an adjacent crop field Danuta Wojewoda, Stefan Russel	Abstract
309-321	The effect of shelterbelts on litter composition and fauna of adjacent fields: in situ experiment Maciej Szanser	Abstract
323-337	Acclimation of silver fir (Abies alba Mill.) seedlings to irradiance conditions under canopies of different tree species in Sudety Mts. (Southern Poland) Piotr Robakowski, Tomasz Wyka	Abstract
339-351	Seasonal and year-to-year variation of numbers of Chironomus plumosus L. and Tubificidae in a lowland reservoir: regularities, causes, mechanisms Zdzisław Kajak, Paweł Prus	Abstract
353-361	Stone-dwelling leeches (Hirudinea, Clitellata) of Lake Hańcza (Poland): different sampling methods determine different taxonomic structures Paweł Koperski	Abstract
363-367	Co-occurrence of two species: Molinia caerulea L. and “red-list” species Carex pulicaris L. in Western Pomerania (Poland) Sylwia Jurzyk, Mariola Wróbel	Abstract
369-376	Bioparameters of selected herb species in High Tatra Mts. spruce ecosystems Ján Kukla, Margita Kováčová, Branislav Schieber	Abstract
377-383	Enrichment ratios of elements in selected plant species from black coal mine dumps in Lower Silesia (Poland) Aleksandra Samecka-Cymerman, Alexius J. Kempers	Abstract
385-388	The painted redstart (Myioborus pictus L.) search rate of a cryptic versus conspicuous prey: a field test of optimal search models Piotr G. Jabłoński	Abstract