References
- Abdel-Rahman, E. M., Makori, D. M., Landmann, T., Piiroinen, R., Gasim, S., Pellikka, P., & Raina, S. K. (2015). The utility of AISA eagle hyperspectral data and random forest classifier for flower mapping. Remote Sensing, 7(10), 13298–13318. https://doi.org/https://doi.org/10.3390/rs71013298
- Alaux, C., Allier, F., Decourtye, A., Odoux, J.-F., Tamic, T., Chabirand, M., Delestra, E., Decugis, F., Le Conte, Y., & Henry, M. (2017). A 'Landscape physiology' approach for assessing bee health highlights the benefits of floral landscape enrichment and semi-natural habitats . Scientific Reports, 7, 40568–40510. https://doi.org/https://doi.org/10.1038/srep40568
- Anderson, K. E., Carroll, M. J., Sheehan, T., Mott, B. M., Maes, P., & Corby-Harris, V. (2014). Hive-stored pollen of honey bees: Many lines of evidence are consistent with pollen preservation, not nutrient conversion. Molecular Ecology, 23(23), 5904–5917. https://doi.org/https://doi.org/10.1111/mec.12966
- Andrada, A. C., & Tellería, M. C. (2005). Pollen collected by honey bees (Apis mellifera L.) from south of Caldén district (Argentina): Botanical origin and protein content. Grana, 44(2), 115–122. https://doi.org/https://doi.org/10.1080/00173130510010459
- Billeter, R., Liira, J., Bailey, D., Bugter, R., Arens, P., Augenstein, I., Aviron, S., Baudry, J., Bukacek, R., Burel, F., Cerny, M., De Blust, G., De Cock, R., Diekötter, T., Dietz, H., Dirksen, J., Dormann, C., Durka, W., Frenzel, M., … Edwards, P. J. (2007). Indicators for biodiversity in agricultural landscapes: a pan-European study M. Journal of Applied Ecology, 45(1), 141–150. https://doi.org/https://doi.org/10.1111/j.1365-2664.2007.01393.x
- Blüthgen, N., & Klein, A. (2011). Functional complementarity and specialisation: The role of biodiversity in plant – pollinator interactions. Basic and Applied Ecology, 12(4), 282–291. https://doi.org/https://doi.org/10.1016/j.baae.2010.11.001
- Bonnefille, R. (1971a). Atlas des pollens d’Ethiopie: pollens actuels de la basse vall6e de l’Omo (Ethiopie). Recoltes Botaniques (1968), 2(11), 463–518..
- Bonnefille, R. (1971b). Atlas des pollens d’Ethiopie Principales especes des forets de montagne. Pollen Spores, 13(1) 15–72.
- Bradford, M. M. (1976). A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding MARION. Analytical Biochemistry, 72(1-2), 248–254. https://doi.org/https://doi.org/10.1016/j.cj.2017.04.003
- Bretagnolle, V., & Gaba, S. (2015). Weeds for bees? A review. Agronomy for Sustainable Development, 35(3), 891–909. https://doi.org/https://doi.org/10.1007/s13593-015-0302-5
- Brodschneider, R., & Crailsheim, K. (2010). Nutrition and health in honey bees. Apidologie, 41(3), 278–294. https://doi.org/https://doi.org/10.1051/apido/2010012
- Brodschneider, R., Gratzer, K., Kalcher-Sommersguter, E., Heigl, H., Auer, W., Moosbeckhofer, R., & Crailsheim, K. (2019). A citizen science supported study on seasonal diversity and monoflorality of pollen collected by honey bees in Austria. Scientific Reports, 9(1), 16633–16612. https://doi.org/https://doi.org/10.1038/s41598-019-53016-5
- Burnett, M. R., August, P. V., Brown, J. H., & Killingbeck, K. T., Jr. * (1998). The influence of geomorphological heterogeneity on biodiversity I. A patch-scale perspective. Conservation Biology, 12(2), 363–370. https://doi.org/https://doi.org/10.1046/j.1523-1739.1998.96238.x
- Clarke, K. R. (1993). Non‐parametric multivariate analyses of changes in community structure. Austral Ecology, 18(1), 117–143. https://doi.org/https://doi.org/10.1111/j.1442-9993.1993.tb00438.x
- Costanza, J. K., Moody, A., & Peet, R. K. (2011). Multi-scale environmental heterogeneity as a predictor of plant species richness. Landscape Ecology, 26(6), 851– 864. https://doi.org/https://doi.org/10.1007/s10980-011-9613-3
- Danner, N., Härtel, S., & Steffan-Dewenter, I. (2014). Maize pollen foraging by honey bees in relation to crop area and landscape context. Basic and Applied Ecology, 15(8), 677–684. https://doi.org/https://doi.org/10.1016/j.baae.2014.08.010 15
- Danner, N., Molitor, A. M., Schiele, S., Härtel, S., & Steffan-Dewenter, I. (2016). Season and landscape composition affect pollen foraging distances and habitat use of Honey bees. Ecological Applications: A Publication of the Ecological Society of America, 26(6), 1920–1929. https://doi.org/https://doi.org/10.1890/15-1840.1
- de Sá-Otero, M. D. P., Armesto-Baztan, S., & Díaz-Losada, E. (2009). Analysis of protein content in pollen loads produced in north-west Spain. Grana, 48(4), 290–296. https://doi.org/https://doi.org/10.1080/00173130903149140
- Degrandi-Hoffman, G., Chen, Y., Huang, E., & Hua, M. (2010). The effect of diet on protein concentration, hypopharyngeal gland development and virus load in worker honey bees (Apis mellifera L.). Journal of Insect Physiology, 56(9), 1184–1191. https://doi.org/https://doi.org/10.1016/j.jinsphys.2010.03.017
- DeGrandi-Hoffman, G., Gage, S. L., Corby-Harris, V., Carroll, M., Chambers, M., Graham, H., Watkins deJong, E., Hidalgo, G., Calle, S., Azzouz-Olden, F., Meador, C., Snyder, L., & Ziolkowski, N. (2018). Connecting the nutrient composition of seasonal pollens with changing nutritional needs of honey bee (Apis mellifera L.) colonies. Journal of Insect Physiology, 109(June), 114–124. https://doi.org/https://doi.org/10.1016/j.jinsphys.2018.07.002
- Di Pasquale, G., Salignon, M., Le Conte, Y., Belzunces, L. P., Decourtye, A., Kretzschmar, A., Suchail, S., Brunet, J.-L., & Alaux, C. (2013). Influence of pollen nutrition on honey bee health: Do pollen quality and diversity matter? PLoS One, 8(8), e72016–13. https://doi.org/https://doi.org/10.1371/journal.pone.0072016
- Dolezal, A. G., Carrillo-Tripp, J., Miller, W. A., Bonning, B. C., & Toth, A. L. (2016). Intensively cultivated landscape and varroa mite infestation are associated with reduced honey bee nutritional state. PLoS One, 11(4), e0153531–13. https://doi.org/https://doi.org/10.1371/journal.pone.0153531
- Donkersley, P., Rhodes, G., Pickup, R. W., Jones, K. C., & Wilson, K. (2014). Honeybee nutrition is linked to landscape composition. Ecology and Evolution, 4(21), 4195–4206. https://doi.org/https://doi.org/10.1002/ece3.1293
- Dukku, H. (2013). Identification of plants visited by the honeybee, Apis mellifera L. in the Sudan Savanna zone of northeastern Nigeria. African Journal of Plant Science, 7(7), 273–284. https://doi.org/https://doi.org/10.5897/AJPS2013.1035
- Erdtman, G. (1969). Handbook of palinology. An introduction to the study of pollen grains and spores. Hafner..
- Estevinho, L. M., Rodrigues, S., Pereira, A. P., & FeáS, X. (2012). Portuguese bee pollen: palynological study, nutritional and microbiological evaluation. International Journal of Food Science & Technology, 47(2), 429–435. https://doi.org/https://doi.org/10.1111/j.1365-2621.2011.02859.x
- European Space Association (ESA) (2017). Open Access Hub. Retrieved November 7, 2018, from https://scihub.copernicus.eu/
- FAO (1996). Agro-ecological zoning guidelines. FAO Soils Bulletin 73. Rome.www.fao.org
- Fening, K. O., Kioko, E. N., Raina, S. K., & Mueke, J. M. (2008). Monitoring wild silkmoth, Gonometa postica Walker, abundance, host plant diversity and distribution in Imba and Mumoni woodlands in Mwingi. Kenya. International Journal of Biodiversity Science and Management, 4(October 2011), 37–41. https://doi.org/https://doi.org/10.3843/Biodiv.4.2
- Filipiak, M. (2018). A better understanding of bee nutritional ecology is needed to optimize conservation strategies for wild bees—the application of ecological stoichiometry. Insects, 9(3), 85. https://doi.org/https://doi.org/10.3390/insects9030085
- Filipiak, M. (2019). Key pollen host plants provide balanced diets for wild bee larvae: A lesson for planting flower strips and hedgerows. Journal of Applied Ecology, 56(6), 1410–1418. https://doi.org/https://doi.org/10.1111/1365-2664.13383
- Filipiak, M., Kuszewska, K., Asselman, M., Denisow, B., Stawiarz, E., Woyciechowski, M., & Weiner, J. (2017). Ecological stoichiometry of the honeybee: Pollen diversity and adequate species composition are needed to mitigate limitations imposed on the growth and development of bees by pollen quality. Plos One , 12(8), e0183236. https://doi.org/https://doi.org/10.1371/journal.pone.0183236
- Gardener, M. (2014). Community ecology (Vol. 75). Pelagic Publishing. https://doi.org/https://doi.org/10.2307/2260552
- Garibaldi, L. A., Steffan-Dewenter, I., Winfree, R., Aizen, M. A., Bommarco, R., Cunningham, S. A., Kremen, C., Carvalheiro, L. G., Harder, L. D., Afik, O., Bartomeus, I., Benjamin, F., Boreux, V., Cariveau, D., Chacoff, N. P., Dudenhöffer, J. H., Freitas, B. M., Ghazoul, J., Greenleaf, S., … Klein, A. M. (2013). Wild Pollinators Enhance Fruit Set of Crops Regardless of Honey Bee Abundance. Science (New York, N.Y.), 339(6127), 1608–1611. https://doi.org/https://doi.org/10.1126/science.1230200
- Gosling, W. D., Miller, C. S., & Livingstone, D. A. (2013). Atlas of the tropical West African pollen flora. Review of Palaeobotany and Palynology, 199, 1–135. https://doi.org/https://doi.org/10.1016/j.revpalbo.2013.01.003
- Hammer, Ø., Harper, D. A. T., & Ryan, P. D. (2001). Past: Paleontological statistics software package for education and data analysis. Palaeontologia Electronica, 4(1), 1–9.
- Hass, A. L., Kormann, U. G., Tscharntke, T., Clough, Y., Baillod, A. B., Sirami, C., Fahrig, L., Martin, J.-L., Baudry, J., Bertrand, C., Bosch, J., Brotons, L., Burel, F., Georges, R., Giralt, D., Marcos-García, M. Á., Ricarte, A., Siriwardena, G., & Batáry, P. (2018). Landscape configurational heterogeneity by small-scale agriculture, not crop diversity, maintains pollinators and plant reproduction in western Europe. Proceedings of the Royal Society B: Biological Sciences, 285(1872), 20172242. https://doi.org/https://doi.org/10.1098/rspb.2017.2242
- Hepburn, H., R., & Radloff, S., E. (1998). Honeybees of Africa. Springer Inc.
- Honnay, O., Piessens, K., Landuyt, W., Van, Hermy, M., & Gulinck, H. (2003). Satellite based land use and landscape complexity indices as predictors for regional plant species diversity. Landscape and Urban Planning, 63(4), 241–250. https://doi.org/https://doi.org/10.1016/S0169-2046(02)00194-9
- Hoover, S. E., & Ovinge, L. P. (2018). Pollen collection, honey production, and pollination services: Managing honey bees in an agricultural setting. Journal of Economic Entomology, 111(4), 1509–1516. https://doi.org/https://doi.org/10.1093/jee/toy125
- Hulsmann, M., Wehrden, H., Von, Klein, A., & Leonhardt, S. D. (2015). Plant diversity and composition compensate for negative effects of urbanization on foraging bumble bees. Apidologie, 46(6), 760–770. https://doi.org/https://doi.org/10.1007/s13592-015-0366-x
- Hung, K. L. J., Kingston, J. M., Albrecht, M., Holway, D. A., & Kohn, J. R. (2018). The worldwide importance of honey bees as pollinators in natural habitats. Proceedings of the Royal Society B: Biological Sciences, 285(1870), 20172140. https://doi.org/https://doi.org/10.1098/rspb.2017.2140
- Kämper, W., Werner, P. K., Hilpert, A., Westphal, C., Blüthgen, N., Eltz, T., & Leonhardt, S. D. (2016). How landscape, pollen intake and pollen quality affect colony growth in How landscape, pollen intake and pollen quality affect colony growth in Bombus terrestris. Landscape Ecology, 31(10), 2245–2258. https://doi.org/https://doi.org/10.1007/s10980-016-0395-5
- Keller, I., Fluri, P., & Imdorf, A. (2005a). Pollen nutrition and colony development in honey bees: Part I. Bee World, 86(1), 3–10. https://doi.org/https://doi.org/10.1080/0005772X.2005.11099641
- Keller, I., Fluri, P., & Imdorf, A. (2005b). Pollen nutrition and colony development in honey bees: Part II. Bee World, 86(2), 27–34. https://doi.org/https://doi.org/10.1080/0005772X.2005.11099650
- Kleijn, D., Carvalheiro, G., Isaacs, R., Winfree, R., Bartomeus, I., Benjamin, F., … Reemer, M., (2016). Delivery of crop pollination services is an insufficient argument for wild pollinator conservation. Nature Communications, 6(May 2015), 7414. https://doi.org/https://doi.org/10.1038/ncomms8414
- Krauss, J., Steffan-Dewenter, I., & Tscharntke, T. (2003). How does landscape context contribute to effects of habitat fragmentation on diversity and population density of butterflies? Journal of Biogeography, 30(6), 889–900. https://doi.org/https://doi.org/10.1046/j.1365-2699.2003.00878.x
- Lau, P., Bryant, V., Ellis, J. D., Huang, Z. Y., Sullivan, J., Schmehl, D. R., Cabrera, A. R., & Rangel, J. (2019). Seasonal variation of pollen collected by honey bees (Apis mellifera) in developed areas across four regions in the United States. PLoS One, 14(6), e0217294. https://doi.org/https://doi.org/10.1371/journal.pone.0217294
- Mandelik, Y., Winfree, R., Neeson, T., & Kremen, C. (2012). Complementary habitat use by wild bees in agro-natural landscapes. Ecological Applications: A Publication of the Ecological Society of America, 22(5), 1535–1546. https://doi.org/https://doi.org/10.1890/11-1299.1
- Matthias, I., Sebastian, M., Semmler, S., & Giesecke, T. (2015). Pollen diversity captures landscape structure and diversity. Journal of Ecology, 103(4), 880–890. https://doi.org/https://doi.org/10.1111/1365-2745.12404
- McMenamin, A., Mumoki, F., Frazier, M., Kilonzo, J., Mweu, B., Baumgarten, T., Patch, H., Torto, B., Masiga, D., Tumlinson, J., Grozinger, C., & Muli, E. (2017). The impact of hive type on the behavior and health of honey bee colonies (Apis mellifera) in Kenya. Apidologie, 48(5), 703–715. https://doi.org/https://doi.org/10.1007/s13592-017-0515-5
- Meltsov, V., Poska, A., & Reitalu, T. (2013). The role of landscape structure in determining palynological and floristic richness. Vegetation History and Archaeobotany, 22, 39–49. https://doi.org/https://doi.org/10.1007/s00334-012-0358-y
- Menezes, C., Vollet-Neto, A., Andrés, F., & León, F. (2013). The role of useful microorganisms to stingless bees and stingless beekeeping. In Pot-Honey: A Legacy of Stingless Bees (pp. 153–171). Springer. https://doi.org/https://doi.org/10.1007/978-1-4614-4960-7
- Mensah, S., Veldtman, R., & Seifert, T. (2017). Potential supply of floral resources to managed honey bees in natural mistbelt forests. Journal of Environmental Management, 189(November), 160–167. https://doi.org/https://doi.org/10.1016/j.jenvman.2016.12.033
- Moh’, I., Albaba, D., & Albaba, I. (2015). A list of important honeybee nectariferous and polleniferous plant species in the West Bank Governorates. Palestine. Journal of Agricultural Science and Technology, 5(2015), 114–121. https://doi.org/https://doi.org/10.17265/2161-6256/2015.02.005
- Nkonya, E., Johnson, T., Kwon, H. Y., & Kato, E. (2015). Economics of land degradation in sub-Saharan Africa. In A global assessment for sustainable development (pp. 215–259). Springer. https://doi.org/https://doi.org/10.1007/978-3-319-19168-3_9
- Ochungo, P., Veldtman, R., Abdel-Rahman, E. M., Raina, S., Muli, E., & Landmann, T. (2019). Multi-sensor mapping of honey bee habitats and fragmentation in agro-ecological landscapes in Eastern Kenya. Geocarto International, 1–22. https://doi.org/https://doi.org/10.1080/10106049.2019.1629645
- Odoux, J. F., Feuillet, D., Aupinel, P., Loublier, Y., Tasei, J. N., & Mateescu, C. (2012). Territorial biodiversity and consequences on physico-chemical characteristics of pollen collected by honey bee colonies. Apidologie, 43(5), 561–575. https://doi.org/https://doi.org/10.1007/s13592-012-0125-1
- Oksanen, J. (2017). Vegan: ecological diversity. R Package Version 2.4-4, 1, 11. Retrieved from https://cran.r-project.org/package=vegan
- Olsen, L. G., Hoopingarner, R., & Martin, E. C. (1979). Pollen preferences of honeybees sited on four cultivated crops. Journal of Apicultural Research, 18(3), 196–200. https://doi.org/https://doi.org/10.1080/00218839.1979.11099967
- Onyango, P., Nyunja, R., Opande, G., & Fedha Sikolia, S. (2019). Inventory, reward value and diversity of Apis mellifera nectariferous and polleniferous forage in Eastern Mau forest. International Journal of Scientific and Research Publications (IJSRP), 9(2), p8608. https://doi.org/https://doi.org/10.29322/IJSRP.9.02.2019.p8608
- 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. https://doi.org/https://doi.org/10.1016/j.tree.2010.01.007
- Raghubanshi, A. S., & Tripathi, A. (2009). Effect of disturbance, habitat fragmentation and alien invasive plants on floral diversity in dry tropical forests of Vindhyan highland: A review. Tropical Ecology, 50(1), 57–69.
- Rasmont, P., Regali, A., Ings, T. C., Lognay, G., Baudart, E., Marlier, M., Delcarte, E., Viville, P., Marot, C., Falmagne, P., Verhaeghe, J.-C., & Chittka, L. (2005). Analysis of pollen and nectar of Arbutus unedo as a food Source for Bombus terrestris (Hymenoptera: Apidae). Journal of Economic Entomology, 98(3), 656–663. https://doi.org/https://doi.org/10.1603/0022-0493-98.3.656
- Reitalu, T., Purschke, O., Johansson, L. J., Hall, K., Sykes, M. T., & Prentice, H. C. (2012). Responses of grassland species richness to local and landscape factors depend on spatial scale and habitat specialization. Journal of Vegetation Science, 23(1), 41–51. https://doi.org/https://doi.org/10.1111/j.1654-1103.2011.01334.x
- Requier, F., Odoux, J.-F., Tamic, T., Moreau, N., Henry, M., Decourtye, A., & Bretagnolle, V. (2015). Honey bee diet in intensive farmland habitats reveals an unexpectedly high flower richness and a major role of weeds. Ecological Applications: A Publication of the Ecological Society of America, 25(4), 881–890. https://doi.org/https://doi.org/10.1890/14-1011.1
- Riollet, G., & Bonnefille, R. (1976). Pollen of the Amaranthaceae of the Basin of lake Rodolphe East Africa–Generic and specific determinations. Pollen Spores, 18(1), 68–92.
- Roubik, D. (1989). Ecology and natural history of tropical bees. Cambridge University Press.
- Roulston, T. H., Cane, J. H., & Buchmann, S. L. (2000). What governs protein content of pollen: Pollinator preferences, pollen-pistil interactions, or phylogeny? Ecological Monographs, 70(4), 617–643. https://doi.org/https://doi.org/10.1890/0012-9615(2000)070[0617:WGPCOP]2.0.CO;2
- Seeley, T. D. (1995). The Wisdom of the Hive: the social physiology of honey bee colonies. Harvard University Press.
- Shmida, A., & Wilson, M. (1985). Biological determinants of species diversity. Journal of Biogeography, 12(1), 1–20. https://doi.org/https://doi.org/10.2307/2845026
- Somerville, D., & Nicol, H. (2006). Crude protein and amino acid composition of honey bee-collected pollen pellets from south-east Australia and a note on laboratory disparity. Australian Journal of Experimental Agriculture, 46(1), 141–149. https://doi.org/https://doi.org/10.1071/EA03188
- Statzner, B., & Moss, B. (2004). Linking ecological function, biodiversity and habitat: a mini-review focusing on older ecological literature. Basic and Applied Ecology, 5(2), 97–106. https://doi.org/https://doi.org/10.1078/1439-1791-00221
- Steffan-Dewenter, I., Danner, N., Keller, A., & Ha, S. (2017). Honey bee foraging ecology: Season but not landscape diversity shapes the amount and diversity of collected pollen. Plos One., 12(8), 9–12.
- Steffan-Dewenter, I., & Kuhn, A. (2003). Honeybee foraging in differentially structured landscapes. Proceedings. Biological Sciences, 270(1515), 569–575. https://doi.org/https://doi.org/10.1098/rspb.2002.2292
- Taguchi, Y. H., & Oono, Y. (2005). Relational patterns of gene expression via non-metric multidimensional scaling analysis. Bioinformatics, 21(6), 730–740. https://doi.org/https://doi.org/10.1093/bioinformatics/bti067
- Vaudo, A. D., Tooker, J. F., Grozinger, C. M., & Patch, H. M. (2015). Bee nutrition and floral resource restoration. Current Opinion in Insect Science, 10(2015), 133–141. https://doi.org/https://doi.org/10.1016/j.cois.2015.05.008
- Vaudo, A. D., Tooker, J. F., Patch, H. M., Biddinger, D. J., Coccia, M., Crone, M. K., Grozinger, C. M. (2020). Pollen protein: Lipid macronutrient ratios may guide broad patterns of bee species floral preferences. Insects, 11(2). https://doi.org/https://doi.org/10.3390/insects11020132
- Visscher, P. K., & Seeley, T. D. (1982). Foraging Strategy of honeybee colonies in a temperate deciduous forest. Ecology, 63(6), 1790–1801. https://doi.org/https://doi.org/10.2307/1940121
- Vollet-Neto, A., Maia-Silva, C., Menezes, C., & Imperatriz-Fonseca, V. (2017). Newly emerged workers of the stingless bee Scaptotrigona aff. depilis prefer stored pollen to fresh pollen. Apidologie, 48(2), 204–210. https://doi.org/https://doi.org/10.1007/s13592-016-0464-4
- Weibull, A., Ostman, O., & Granqvist, A. (2003). Species richness in agroecosystems: The effect of landscape, habitat and farm management. Biodiversity and Conservation, 12(7), 1335–1355. https://doi.org/https://doi.org/10.1023/A
- Wickham, H., Hester, J., Chang, W. (2020). Package ‘DevTools’ R Package Version 2.4-4, 1, 11. Retrieved from https://cran.r-project.org/package=devtools
- Winfree, R., Griswold, T., & Kremen, C. (2007). Effect of human disturbance on bee communities in a forested ecosystem. Conservation Biology: The Journal of the Society for Conservation Biology, 21(1), 213–223. https://doi.org/https://doi.org/10.1111/j.1523-1739.2006.00574.x
- 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(2012), 112–122. https://doi.org/https://doi.org/10.1016/j.agee.2012.06.020
- Wright, G. A., Nicolson, S. W., & Shafir, S. (2018). Nutritional physiology and ecology of honey bees. Annual Review of Entomology, 63(2018), 327–344. https://doi.org/https://doi.org/10.1146/annurev-ento-020117-043423