naa a22 4500 510737641 CHVBK 20180411083016.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11284-013-1051-z doi (NATIONALLICENCE)springer-10.1007/s11284-013-1051-z Ishii Hiroshi Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, 930-8555, Toyama, Japan aut Community-dependent foraging habits of flower visitors: cascading indirect interactions among five bumble bee species [Elektronische Daten] [Hiroshi Ishii] Despite the ubiquity and the importance of interspecific interactions among flower visitors, few studies have examined their effects on the realized feeding niches of visitor species in a community context. To evaluate the community-wide effects of interactions among flower visitors, I have examined changes in the flower utilization patterns of each visitor species at several sites where the component of the visitor's community differed. Specifically, I compared the flower preferences and foraging habits (legitimate foraging vs. primary nectar robbing vs. secondary nectar robbing) of five bumble bee species in flower patches consisting of Trifolium pratense L. (red clover) and T. repens L. (white clover) on Hokkaido Island, Japan. I also examined the nectar production and standing crops of each flower species to evaluate the exploitation competition based on nectar. The bumble bee species exhibited different flower utilization patterns among sites. At sites where the long-tongued Bombus diversus tersatus was common and the exotic short-tongued B. terrestris was rare, B. diversus tersatus visited red clover (long-tubed flowers) exclusively, whereas medium-tongued B. pseudobaicalensis and short-tongued B. hypocrita sapporoensis and B. hypnorum koropokkrus preferentially visited white clover (short-tubed flowers). Conversely, at sites where the long-tongued bee was rare, four other species frequently visited red clover in different modes: B. pseudobaicalensis visited legitimately, B. hypocrita sapporoensis and B. terrestris visited as primary nectar robbers, and B. hypnorum koropokkrus visited as a secondary nectar robber. The presence or absence of resource exploitation by the long-tongued species and the interaction between primary and secondary nectar robbers via robbing holes was the major ecological sources of these differences. Diverse effects of interactions among flower visitors played important roles in shaping pattern of plant and flower visitor interactions. The Ecological Society of Japan, 2013 Bombus terrestris nationallicence Cascading effect nationallicence Multidimensional interactions nationallicence Nectar robbing nationallicence Pollinator nationallicence Ecological Research Springer Japan 28/4(2013-07-01), 603-613 0912-3814 28:4<603 2013 28 11284 https://doi.org/10.1007/s11284-013-1051-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-013-1051-z text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Ishii Hiroshi Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, 930-8555, Toyama, Japan aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/4(2013-07-01), 603-613 0912-3814 28:4<603 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer