The influence of relative plant density and floral morphological complexity on the behaviour of bumblebees

@article{Stout1998TheIO,
  title={The influence of relative plant density and floral morphological complexity on the behaviour of bumblebees},
  author={J C Stout and John A. Allen and Dave Goulson},
  journal={Oecologia},
  year={1998},
  volume={117},
  pages={543-550}
}
Abstract We assessed the combined effects of varying the relative density and the relative floral morphological complexity of plant species on the behaviour of their bumblebee pollinators. Three species of bumblebee (Bombus pascuorum, B. terrestris and B. hortorum) were observed foraging on experimental arrays consisting of pair-wise combinations of four plant species: Borago officinalis, Phacelia tanacetifolia (both with simple flowers), Antirrhinum majus and Linaria vulgaris (both with… 
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References

SHOWING 1-10 OF 58 REFERENCES
Resource Partitioning in Bumblebees: Experimental Studies of Foraging Behavior
TLDR
These removal experiments demonstrated that the bumblebees were sampling flowers frequently enough and were flexible enough in the absence of other bumblebee species.
Do Tropical Bird‐Pollinated Plants Exhibit Density‐Dependent Interactions? Field Experiments
TLDR
In a tropical cloud forest at Monteverde, Costa Rica, three understory shrub species overlap greatly in flowering seasons and share hummingbird pollinators, apparently the intensity of density dependence, at least in terms of female reproductive success, varies among plant species sharing pollinators.
Floral display size in comfrey, Symphytum officinale L. (Boraginaceae): relationships with visitation by three bumblebee species and subsequent seed set
TLDR
It is suggested that in this system seed set is not limited by pollination but by other factors, possibly nutritional resources.
DIFFERENCES IN THE FLOWERS VISITED BY FOUR SPECIES OF BUMBLE-BEES AND THEIR CAUSES
TLDR
The object of this study was to determine what differences existed in one small area in the feeding plants of the four common species of Bombus present, and the cause of these differences.
Competition for Pollinators between Simultaneously Flowering Species
TLDR
The outcome of interspecific competition was analyzed with a simple two-species model and found that an increase in pollinator constancy to a given plant species retards the elimination of the rarer species.
A Model to Predict the Influence of Insect Flower Constancy on Interspecific Competition between Insect Pollinated Plants
TLDR
A simple two-flower species model is developed which predicts the proportion of insects which will favour each of the two species for particular flower densities, assuming that individual insects favour the species which provides them with the greatest reward per time.
Predicted pollen dispersal by honey-bees and three species of bumble-bees foraging on oil-seed rape : a comparison of three models
TLDR
Overall, the consensus of the models' predictions is that most of the pollen from a source plant is deposited on immediate neighbours, but that long-distance pollen dispersal in this system extends over approximately 20-40 intervening plants from the originating plant, depending on the identity of the pollinator.
The flower-visiting behaviour of bumble bees: floral complexity and learning.
TLDR
The initial probing response of inexperienced bumble bees is mainly instinctive behaviou... the time spent in trial and error learning before the criterion was obtained was significantly greater for flowers of high structural complexity than for those of intermediate and low complexity.
THE FORAGING SPECIALIZATIONS OF INDIVIDUAL BUMBLEBEES
TLDR
The foraging behavior of bumblebees is discussed from a comparative standpoint with other bees and in relation to food distribution and availability in the environment.
Pollinator Foraging Strategies in Mixed Floral Arrays: Density Effects and Floral Constancy
  • KuninIwasa
  • Biology, Medicine
    Theoretical population biology
  • 1996
TLDR
The implications of a game-theoretic model of pollinators foraging on a mixed array of two flower species, with individual pollinators either specializing on one or the other, or else acting as generalists, are explored.
...
...