caa a22 4500 477038913 CHVBK 20180405111312.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00984750 doi (NATIONALLICENCE)springer-10.1007/BF00984750 Vaughton Glenda Department of Biological Sciences, University of Wollongong, 2522, Wollongong, N.S.W., Australia aut Pollination disruption by European honeybees in the Australian bird-pollinated shrub Grevillea barklyana ( Proteaceae ) [Elektronische Daten] [Glenda Vaughton] European honeybees (Apis mellifera) were less efficient pollinators ofGrevillea barklyana than nectar-feeding birds. Nectar-collecting honeybees did not contact reproductive parts of flowers. Pollen-collecting honeybees preferentially visited malestage flowers but rarely visited female-stage flowers. Fruit set on caged inflorescences that allowed access to honeybees but excluded birds was reduced by more than 50% compared to inflorescences that were visited by both types of visitors. Further, fruit set on caged inflorescences was less than on bagged inflorescences that excluded both birds and honeybees, indicating that pollen removal by bees decreased opportunities for delayed autonomous selfing in the absence of birds. Although fruit set was not pollen-limited at the study site, pollen removal by honeybees would decrease fruit set in small populations where birds are scarce. In addition, pollen removal by honeybees would reduce opportunities for outcrossing and reproductive success through male function. Although honeybees have been in Australia for insufficient time to have exerted selection on floral traits, evolutionary shifts in response to these animals are likely to occur in the future. Springer-Verlag, 1996 Proteaceae nationallicence Grevillea barklyana nationallicence Pollinator efficiency nationallicence nectar-feeding birds nationallicence Apis mellifera nationallicence Flora of Australia nationallicence Plant Systematics and Evolution Springer-Verlag 200/1-2(1996-03-01), 89-100 0378-2697 200:1-2<89 1996 200 606 https://doi.org/10.1007/BF00984750 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00984750 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Vaughton Glenda Department of Biological Sciences, University of Wollongong, 2522, Wollongong, N.S.W., Australia aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 200/1-2(1996-03-01), 89-100 0378-2697 200:1-2<89 1996 200 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer