[Alaux C., Ducloz F., Crauser D., Le Conte Y. (2015). Diet effects on honeybee immunocompetence. Biology Letters ,6, 562-565. DOI: 10.1098/rsbl.2009.098610.1098/rsbl.2009.0986293619620089536]Search in Google Scholar
[Braun-Blanquet J. (1964). Pflanzensociologie. Grundzüge der Vegetationskunde. 3. Auflage Springer-Verlag, Wien. 865 pp.]Search in Google Scholar
[Denisow B. (2011). Pollen production of selected ruderal plant species in the Lublin area. University of Life Sciences Press. Lublin. 86 pp.]Search in Google Scholar
[Denisow B., Wrzesień M. (2007). The anthropogenic refuge areas for bee flora in agricultural landscape. Acta Agrobotanica, 60, 147-157.10.5586/aa.2007.018]Search in Google Scholar
[Denisow, B., Wrzesień, M. (2015). The importance of field-margin location for maintenance of food niches for pollinators. Journal of Apicultural Science, 59(1), 27-37. DOI: 10.1515/JAS-2015-000210.1515/jas-2015-0002]Search in Google Scholar
[Ebeling A., Klein A. M., Weisser W. W., Tscharntke T. (2012). Multitrophic effects of experimental changes in plant diversity on cavity-nesting bees, wasps, and their parasitoids. Oecologia, 169, 453-465.10.1007/s00442-011-2205-822120706]Search in Google Scholar
[Ebeling A., Klein A.-M., Schumacher J., Weisser W. W., Tscharntke T. (2008). How does plant richness affect pollinator richness and temporal stability of flower visits? Oikos, 117(12), 1808-1815. DOI: 10.1111/j.1600-0706.2008.16819.x 10.1111/j.1600-0706.2008.16819.x]Search in Google Scholar
[Faegri K. L., van der Pijl (1979). The principles of pollination ecology. 3 rd ed. Pergamon Press, Oxford, 244 pp.]Search in Google Scholar
[Fahrig L. (2003). Effects of habitat fragmentation on biodiversity. Annual Review of Ecology, Evolution and Systematics, 34, 487-515. DOI:10.1146/ annurev.ecolsys.34.011802.13241910.1146/annurev.ecolsys.34.011802.132419]Search in Google Scholar
[Falkowski M., Pytel N. (2014). The analysis of current status of the railway transport system in Poland. Geopolitical Review, 9, 71-95.]Search in Google Scholar
[Fijałkowski D. (2003). Ochrona przyrody i środowiska na Lubelszczyźnie [Protection of nature and environment of Lublin Voivodeship]. Lubelskie Towarzystwo Naukowe, Lublin. 408 pp.]Search in Google Scholar
[Fussell M., Corbet S.A. (1992). Flower usage by bumble-bees: a basis for forage plant management. Journal of Applied Ecology, 29(2), 451-465. DOI:10.2307/240451310.2307/2404513]Search in Google Scholar
[Holzchuh A., Steffan-Dewenter I., Kleijn D., Tscharntke T. (2007). Diversity of flower-visiting bees in cereal fields: effects of farming system, landscape composition and regional context. Journal of Applied Ecology, 44(1), 41-49. DOI: 10.1111/j.1365-2664.2006.01259.x 10.1111/j.1365-2664.2006.01259.x]Search in Google Scholar
[Hülsmann M. H., von Wehrden H., Klein A-M. K., Leonhardt S. D. L. (2015). Plant diversity and composition compensate for negative effects of urbanization on foraging bumble bees. Apidologie DOI: 10.1007/ s13592-015-0366-x 10.1007/s13592-015-0366-x]Search in Google Scholar
[Jędrzejewska-Szmek K., Zych M. (2013). Flowervisitor and pollen transport networks in a large city: structure and properties. Arthropod-Plant Interactions, 7, 503-516. DOI: 10.1007/s11829-013-9274-z 10.1007/s11829-013-9274-z]Search in Google Scholar
[Kalarus K., Bąkowski M. (2015). Railway tracks can have great value for butterflies as a new alternative habitat. Italian Journal of Zoology, 82(4), 565-572. DOI: 10.1080/11250003.2015.107841710.1080/11250003.2015.1078417]Search in Google Scholar
[Kearns C. A. (2001). North American dipteran pollinators: assessing their value and conservation status. Conservation Ecology, 5(1), 5.10.5751/ES-00262-050105]Search in Google Scholar
[Kleijn D., van Langevelde F. (2006). Interesting effects of habitat quantity and quality on insects. Basic and Applied Ecology, 7, 201-214. DOI:10.1016/j. baae.2005.07.011]Search in Google Scholar
[Klotz S., Kühn I., Durka W. (eds) (2002). BIOLFLOR: Eine Datenbank mit biologisch-ökologischen Merkmalen zur Flora von Deutschland. Schriftenr Vegetationsk, 38, 1-334.]Search in Google Scholar
[Kołtowski Z. (2006). Wielki atlas roślin miododajnych. [Great atlas of melliferous plants]. Wydanie Rzeczpospolita. Warszawa. 327 pp.]Search in Google Scholar
[Kovach W. L. (2005). MVSP - A MultiVariate statistical package for windows, ver. 3.1. Kovach Computing Services. Pentraeth, Wales, U.K. 138 pp.]Search in Google Scholar
[Mirek Z., Piękoś-Mirkowa H., Zając A., Zając M. (2002). Flowering plants and pteridophytes of Poland. A checklist. Biodiversity of Poland, vol. 1. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków. 442 pp.]Search in Google Scholar
[Moroń D., Lenda M., Skórka P., Szentgyörgyi H., Settele J., Woyciechowski M. (2009). Wild pollinator communities are negatively affected by invasion of alien goldenrods in grassland landscapes. Biological Conservation, 142(7), 1322-1332. DOI: 10.1016/j. biocon.2008.12.036]Search in Google Scholar
[Moroń D., Skórka P., Lenda M., Rożej-Pabijan E., Wantuch M., Kajzer-Bonk J., Celary W., Mielczarek L.E., Tryjanowski P. (2014). Railway embankments as new habitat for pollinators in an agricultural landscape. PLoS ONE, 9(7), e101297. DOI:10.1371/journal. pone.0101297.]Search in Google Scholar
[Nicolson SW, Thornburg RW. Nectar chemistry. In: Nicolson SW., Nepi M., Pacini E. (Eds) Nectaries and Nectar, Springer Dordrecht. 2007; pp 215-263 10.1007/978-1-4020-5937-7_5]Search in Google Scholar
[Osborne J.L., Clark S.J., Morris R.J., Williams I.H., Riley J.R., Smith A. D., Reynolds D. R., Edwards A. S. (1999). A landscape-scale study of bumble bee foraging range and constancy, using harmonic radar. Journal of Applied Ecology, 36, 519-533.10.1046/j.1365-2664.1999.00428.x]Search in Google Scholar
[Potts S. G., Roberts S. P., Dean R., Marris G., Brown M. A., Jones R., Neumann P., Settele J. (2010). Declines of managed honey bees and beekeepers in Europe. Journal of Apicultural Research, 49(1), 15-22. DOI: 10.3896/ibra.1.49.1.0210.3896/IBRA.1.49.1.02]Search in Google Scholar
[Proctor M., Yeo P., Lack A. (1996). The natural history of pollination. Timber Press, Portland. Oregon. 479 pp.]Search in Google Scholar
[Spiekermann K., Wegener M., Kveton V., Marada M., Schürmann C., Biosca O., Ulied Segui A., Antikainen H., Kotavaara O., Rusanen J., Bielanska D., Fiorello D., Komornicki T., Rosik P., Stepniak M. (2015). Transport Accessibility at Regional/Local Scale and Patterns in Europe. TRACC Executive Summary and Final Report. Luxembourg: ESPON. 78 pp.]Search in Google Scholar
[Stanisz A. (2007). Przystępny kurs statystyki z zastosowaniem Statistica na przykładach z medycyny. [Accessible course in statistics on example from medicine]. Statsoft Polska. Kraków. 359 pp.]Search in Google Scholar
[Steffan-Dewenter I.,·Tscharntke T. (2000). Resource overlap and possible competition between honey bees and wild bees in central Europe. Oecologia 122, 288-296. DOI: 10.1007/s004420050034 ter Braak C. J. F., Šmilauer P. (2012). Canoco reference manual and user’s guide: software for ordination, version 5.0. Microcomputer Power. Ithaca, USA. 496 pp.]Search in Google Scholar
[The World Factbook 2013-14. Washington, DC: Central Intelligence Agency, https://www.cia.gov/library/publications/the-world-factbook/index.htm ]Search in Google Scholar
[Tikka P., Koski P., Kivelä R., Kuitunen M. T. (2000). Can grassland plant communities be preserved on road and railway verges? Applied Vegetation Science, 3, 25-32. DOI: 10.2307/147891510.2307/1478915]Search in Google Scholar
[Wratten S. D., Gillespie M., Decourtye A., Mader E., Desneux N. (2012). Pollinator habitat enhancement: Benefits to other ecosystem services. Agriculture, Ecosystems and Environment, 159, 112-122. DOI:10.1016/j.agee.2012.06.02010.1016/j.agee.2012.06.020]Search in Google Scholar
[Wrzesień M. (2009). Threatened vascular plants species in railway areas of the Lublin region (eastern Poland) in: Mirek Z., Nikel A. (eds). Rare, relic and endangered plants and fungi in Poland. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, 545-553.]Search in Google Scholar
[Wrzesień M., Święs F. (2006) Flora i zbiorowiska roślinne terenów kolejowych zachodniej części Wyżyny Lubelskiej. [Flora and vascular plants communities of railway areas of the western part of the Lublin Upland]. Wydawnictwo UMCS, Lublin. 255 pp.]Search in Google Scholar
[Wrzesień M., Denisow B. (2007). The phytocoenoses of anthropogenically transformed areas with a great importance for Apoidea. Acta Agrobotanica, 60, 117-126. DOI: 10.5586/aa.2007.03910.5586/aa.2007.039]Search in Google Scholar
[Vanbergen A. J. (2013). The Insect Pollinator Initiative. Threats to an ecosystem service: pressures on pollinators. Frontiers in Ecology and the Environment, 11, 251-259. DOI:10.1890/12012610.1890/120126]Search in Google Scholar
[Zarzycki K., Trzcińska-Tacik H., Różański W., Szeląg Z., Wołek J. & Korzeniak U. (2002). Ecological indicator values of vascular plants of Poland. W. Szafer Institute of Botany, Polish Academy of Science, Kraków. 183 pp.]Search in Google Scholar
[Zych M. (2007). On flower visitors and true pollinators: The case of protandrous Heracleum sphondylium L. (Apiaceae). Plant Systematics and Evolution, 263, 159-179. DOI: 10.1007/s00606-006-0493-y10.1007/s00606-006-0493-y]Search in Google Scholar