Abstract
The goal of agri-environmental schemes (AES) and greening programs are protecting and increasing biodiversity in agricultural lands. The evaluation of effectiveness of AES needs further investigations. For the purpose of investigations, species and species groups should be selected which can indicate the effects of changes in landscape use on biodiversity. Bumblebees are good indicators for this purpose.
 The role of bumblebees in pollination is well studied but in the case of different crops, much less detailed data are available. In 2018, bumblebee assemblages of 44 sites belonged to 8 different agricultural and semi-natural habitat types were studied in the surroundings of Sajószöged, Tiszaújváros and Derecske.
 This study provides new distribution data of 8 bumblebee species in three 10×10 km UTM cells covering the sampling area. According to our results, the alfalfa and red clover fields and semi-natural grasslands has more species rich and abundant bumblebee assemblages than different crop fields (sunflower, oilseed radish and vegetable morrow) and can help protect bumblebee assemblages of agricultural lands. Based on the collected distribution and abundance data, the role of the bumblebees in pollination of the studied crops should be re-evaluated.
Highlights
In Europe, the agri-environmental schemes (AES) have been introduced in the beginning of the 90’s
Bumblebee assemblages During the sampling period 269 specimen of 8 bumblebee species were detected
Samplings were made in summer of 2018 in 44 sampling sites of sunflower, oilseed radish, vegetable marrow, alfalfa and red clover fields, alfalfa hedging and semi-natural grasslands of hayfields and dike slopes
Summary
In Europe, the agri-environmental schemes (AES) have been introduced in the beginning of the 90’s. The role of „green infrastructure” in the biodiversity conservation and human welfare is increasingly well-known, for the evaluation of the effectiveness of agri-environmental schemes, many investigations should be made (Kleijn and Sutherland, 2003; Gordon et al, 2009; Jorgensen and Gobster, 2010). This is especially necessary in the Central and Middle European countries because in this region the biodiversity is higher, while the agriculture is less intensive in West European region (Donald et al, 2002; EEA, 2003; Jeanneret et al, 2003)
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