Ecology and conservation status of bumblebee species remains poorly understood, especially in rapidly degrading urban ecosystems, which is important considering the role of bumblebees in the pollinations. We collected more than 200 bumblebee (Bombus spp.) specimens under six species in different parts of the Kathmandu valley (Kathmandu, Lalitpur, and Bhaktapur cities) in Nepal. The species of bumblebees were analyzed with their host plant types and the land use change using remote sensing and field observation data. We found that the bumblebees exert strong variation and were significantly affected by the families of the host plants and the nature of flowers (open and closed type) rather than colors and categories (invasive and noninvasive). We underline that the rapid habitat loss by changing land use in the study area can be a potential threat to the conservation of these important pollinators, and thus, need focused habitat conservation efforts.
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Bezemer T.M. Harvey J.A. Cronin J.T. (2014) Response of native insect communities to invasive plants. Annual Review of Entomology 59:119–141
Biesmeijer J.C. Robert S.P.M. Reemer M. (2006) Parallel declines in pollination and insect pollinated plants in Britain and Netherlands. Science 313(5787):351–354
Cameron S.A. Lozier J.D. Strange J.P. Koch J.B. Cordes N. Solter L.F. Griswold T.L. (2011) Patterns of widespread decline in North American bumble bees. Proc Natl AcadSci 108:662–667
Carvell C. Osborne J. L. Bourke A. F. G. Freeman S. N. Pywell R. F. & Heard M. S. (2011). Bumble bee species’ responses to a targeted conservation measure depend on landscape context and habitat quality. Ecological Applications 21(5) 1760–1771.
Chittka L. Raine N.E. (2006) Recognition of flowers by pollinators. Current Opinion in Plant Biology 9(4):428–435
Cnaani J. Thomson J.D. Papaj D.R. (2006) Flower choice and learning in foraging bumblebees: effects of variation in nectar volume and concentration. Ethology 112(3):278–285
Corbet S.A. Fussell M. Ake R. Fraser A. Gunson C. Savage A. Smith K. (1993) Temperature and the pollinating activity of social bees. Ecological Entomology 18(1):17–30
Dotterl S. Gluck U. Jurgens A. Woodring J. Aas G. (2014) Floral reward advertisement and attractiveness to honey bees in dioecious Salix caprea. PloS one 9(3) e93421
Dyer A.G. Chittka L. (2004) Fine colour discrimination requires differential conditioning in bumblebees. Naturwissenschaften 91(5):224–227
Elliott S.E. (2009) Subalpine bumble bee foraging distances and densities in relation to flower availability. Environmental Entomology 38(3);748–756
Faeth S.H. Bang C. Saari S. (2011) Urban biodiversity: Patterns and mechanisms. Ann N Y AcadSci 1223:69–81. Doi: https://doi.org/10.1111/j.1749-6632.2010.05925.x
Fornoff F. Klein A.M. Hartig F. Benadi G. Venjakob C. Schaefer H.M. Ebeling A. (2017) Functional flower traits and their diversity drive pollinator visitation. Oikos 126(7):1020–1030
Gardiner M.M. Prajzner S.P. Burkman CE Albro S Grewal PS (2014) Vacant land conversion to community gardens: influences on generalist arthropod predators and biocontrol services in urban greenspaces. Urban Ecosyst 17:101–122. Doi: https://doi.org/10.1007/s11252-013-0303-6
Geslin B. Gauzens B. Thebault E. Dajoz I. (2013) Plant pollinator networks along a gradient of urbanisation. PloS one 8 e63421
Goulson D. Lepais O. O’Connor S. Osborne J.L. Sanderson R.A. Cussans J. Darvill. B. (2010) Effects of land use at a landscape scale on bumblebee nest density and survival. Journal of Applied Ecology 47(6):1207–1215
Grimm N.B. Faeth S.H. Golubiewski N.E. Redman C.L. Wu J. Bai X. Briggs J.M. (2008) Global change and the ecology of cities. Science 319(5864):756–760
Grixti J.C. Wong L.T. Cameron S.A. Favret C. (2009) Decline of bumble bees (Bombus) in the North American Midwest. Biological Conservation 142:75–84
Gunnarsson B. &Federsel L. M. (2014). Bumblebees in the city: abundance species richness and diversity in two urban habitats. Journal of Insect Conservation 18(6) 1185–1191
Jacobson M.M. Tucker E.M. Mathiasson M.E. Rehan S.M. (2018) Decline of 410 bumble bees in northeastern North America with special focus on Bombusterricola. BiolConserv 217:437–445
Jha S. &Kremen C. (2013). Urban land use limits regional bumble bee gene flow. Molecular Ecology 22(9) 2483–2495.
Kerr J.T. Pindar A. Galpern P. Packer L. Potts S.G. Roberts S.M. Rasmont P. Schweiger O. Colla S.R. Richardson L.L. Wagner D.L. Gall L.F. Sikes D.S. Pantotoja A. (2015) Climate change impacts on bumblebees across continents. Science 349:177–180
Miller-Struttmann N.E. Galen C. (2014) High-altitude multi-taskers: bumble bee food plant use broadens along an altitudinal productivity gradient. Oecologia 176:1033–1045
Myczko L. Banaszak-Cibicka W. Sparks T. H. Tryjanowski P. (2015) Do queens of bumblebee species differ in their choice of flower colour morphs of Corydalis cava (Fumariaceae)?. Apidologie 46(3) 337–345.
Nagano Y. Abe K. Kitazawa T. Hattori M. Hirao A.S. Itino T. (2014) Changes in pollinator fauna affect altitudinal variation of floral size in a bumblebee-pollinated herb. Ecology and Evolution 4:3395–3407
Neil K. & Wu J. (2006). Effects of urbanization on plant flowering phenology: a review. Urban Ecosystems 9(3) 243–257.
Potts S.G. Biesmeijer J.C. Kremen C. Neumann P. Schweiger O. Kunin W.E. (2010) Global pollinator declines: trends impacts and drivers. Trends in Ecology & Evolution 25(6):345–353
Rasmont P. Franzén M. Lecocq T. Harpke A. Stuart P.M.R. Biesmeijer J. Castro L. Cederberg B. Dvorák L. Fitzpatrick U. Gonseth Y. Haubruge E. Mahé G. Manino A. Michez D. Neumayer J. odegaard F. Paukkunen J. Pawlikowski T. Simon G.P. Reemer M. Settele J. Straka J. Schweiger O. (2015) Climatic risk and distribution atlas of European bumblebees. BioRisk 10:1–236
Raupp M.J. Shrewsbury P.M. Herms D.A. (2010) Ecology of herbivorous arthropods in urban landscapes. Annual Review of Entomology 55
Reverté S. Retana J. Gómez J.M. Bosch J. (2016) Pollinators show flower colour preferences but flowers with similar colours do not attract similar pollinators. Annals of Botany 118:249–257
Rocha E. A. Fellowes M.D. (2018) Does urbanization explain differences in interactions between an insect herbivore and its natural enemies and mutualists? Urban Ecosystems 21:405–417
Saini M.S. Raina R.H. Ghator H.S. (2015) Indian Bumblebees. Bishen Singh 462 Mahendra Pal Singh Dehra Dun India
Sinu P.A. Kuriakose G. Shivanna K.R. (2011) Is the bumblebee (Bombushaemorrhoidalis) the only pollinator of large cardamom in central Himalayas India? Apidologie 42:690–695
Stone G.N. Raine N.E. Prescott M. Willmer P.G. (2003) Pollination ecology of acacias (Fabaceae Mimosoideae). Australian Systematic Botany 16:103–118
Weiner C.N. Werner M. Linsenmair K.E. Blüthgen N. (2014) Land-use impacts on plant–pollinator networks: interaction strength and specialization predict pollinator declines. Ecology 95:466–474
Williams P.H. Ito M. Matsumura T. Kudo I. (2010) The bumblebees of the Nepal Himalaya (Hymenoptera: Apidae). Insectamatsumurana. Series entomology. New series 66:115–151
Williams P.H. Osborne J.L. (2009) Bumblebee vulnerability and conservation world-wide. Apidologie 40(3):367–387
Yu W. B. LI D. Z. & Wang H. (2012). Highly efficient pollination by bumblebees ensures seed production in Pedicularislachnoglossa (Orobanchaceae) an early-flowering Himalayan plant. Journal of Systematics and Evolution 50(3) 218–226.