Mid-field woodlots as refuges for bees - Zadrzewienia śródpolne jako ostoje pszczół

The following paper presents the main results of a series of studies on bees Apiformes (Anthophila) in various types of mid-field woodlots in the agricultural landscape, conducted since the 1970s in Western Poland. The studied woodlots (also referred to as field woods, forest islands, or wooded patches) are located in the Wielkopolska-Kujawska Lowland