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Insights from measuring pollen deposition: quantifying the pre-eminence of bees as flower visitors and effective pollinators

Journal Article
Willmer, P. G., Cunnold, H., & Ballantyne, G. (2017)
Insights from measuring pollen deposition: quantifying the pre-eminence of bees as flower visitors and effective pollinators. Arthropod-Plant Interactions, 11(3), 411-425. https://doi.org/10.1007/s11829-017-9528-2
Using our accumulated datasets from Kenyan savanna, Mediterranean garigue, UK gardens and heathland, involving 76 plants from 30 families, we present detailed data to quantify...

Habitat segregation by female humpback whales in Hawaiian waters: avoidance of males?

Journal Article
Craig, A. S., Herman, L. M., Pack, A. A., & Waterman, J. (2014)
Habitat segregation by female humpback whales in Hawaiian waters: avoidance of males?. Behaviour, 151(5), 613-631. https://doi.org/10.1163/1568539x-00003151
Humpback whales congregate annually in low-latitude winter breeding and calving grounds. While on these grounds, females with a dependent calf (‘maternal females’) are sometim...

Size-assortative pairing and discrimination of potential mates by humpback whales in the Hawaiian breeding grounds

Journal Article
Pack, A. A., Herman, L. M., Spitz, S. S., Craig, A. S., Hakala, S., Deakos, M. H., …Lowe, C. (2012)
Size-assortative pairing and discrimination of potential mates by humpback whales in the Hawaiian breeding grounds. Animal Behaviour, 84(4), 983-993. https://doi.org/10.1016/j.anbehav.2012.07.024
Assortative pairing, and its relation to mate choice, has rarely been documented in mammals. Using data collected from 1998-2007, we investigated size-assortative pairing as i...

Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals

Journal Article
Herman, L. M., Pack, A. A., Rose, K., Craig, A., Herman, E. Y. K., Hakala, S., & Milette, A. (2011)
Resightings of humpback whales in Hawaiian waters over spans of 10-32 years: Site fidelity, sex ratios, calving rates, female demographics, and the dynamics of social and behavioral roles of individuals. Marine Mammal Science, 27(4), 736-768. https://doi.org/10.1111/j.1748-7692.2010.00441.x
From a database of approximately 5,000 Hawaiian humpback whales identified photographically between 1976 and 2010, we extracted 71 males and 39 females having resighting spans...

Pollinator importance networks illustrate the crucial value of bees in a highly speciose plant community

Journal Article
Ballantyne, G., Baldock, K. C. R., Rendell, L., & Willmer, P. (2017)
Pollinator importance networks illustrate the crucial value of bees in a highly speciose plant community. Scientific Reports, 7(1), https://doi.org/10.1038/s41598-017-08798-x
Accurate predictions of pollination service delivery require a comprehensive understanding of the interactions between plants and flower visitors. To improve measurements of p...

Estimating pollinator performance of visitors to the self-incompatible crop-plant Brassica rapa by single visit deposition and pollen germination: a comparison of methods

Journal Article
Patchett, R., Ballantyne, G., & Willmer, P. (2017)
Estimating pollinator performance of visitors to the self-incompatible crop-plant Brassica rapa by single visit deposition and pollen germination: a comparison of methods. Journal of Pollination Ecology, 21(3), 78-85
Estimating the pollen-deposition effectiveness of flower visitors is fundamental to understanding their performance as pollinators. While estimates of visitation rates, pollen...

Why flower visitation is a poor proxy for pollination: measuring single-visit pollen deposition, with implications for pollination networks and conservation

Journal Article
King, C., Ballantyne, G., & Willmer, P. G. (2013)
Why flower visitation is a poor proxy for pollination: measuring single-visit pollen deposition, with implications for pollination networks and conservation. Methods in Ecology and Evolution, 4(9), 811-818. https://doi.org/10.1111/2041-210x.12074
Summary The relative importance of specialized and generalized plant-pollinator relationships is contentious, yet analyses usually avoid direct measures of pollinator quality ...

Floral visitors and ant scent marks: noticed but not used?

Journal Article
Ballantyne, G., & Willmer, P. (2012)
Floral visitors and ant scent marks: noticed but not used?. Ecological Entomology, 37(5), 402-409. https://doi.org/10.1111/j.1365-2311.2012.01378.x
1. Bee behaviour when visiting flowers is mediated by diverse chemical cues and signals, from the flower itself and from previous visitors to the flower. Flowers recently visi...

Nectar Theft and Floral Ant-Repellence: A Link between Nectar Volume and Ant-Repellent Traits?

Journal Article
Ballantyne, G., & Willmer, P. (2012)
Nectar Theft and Floral Ant-Repellence: A Link between Nectar Volume and Ant-Repellent Traits?. PLOS ONE, 7(8), https://doi.org/10.1371/journal.pone.0043869
As flower visitors, ants rarely benefit a plant. They are poor pollinators, and can also disrupt pollination by deterring other flower visitors, or by stealing nectar. Some pl...

Constructing more informative plant–pollinator networks: visitation and pollen deposition networks in a heathland plant community

Journal Article
Ballantyne, G., Baldock, K. C. R., & Willmer, P. G. (2015)
Constructing more informative plant–pollinator networks: visitation and pollen deposition networks in a heathland plant community. Proceedings of the Royal Society B: Biological Sciences, 282(1814), 20151130. https://doi.org/10.1098/rspb.2015.1130
Interaction networks are widely used as tools to understand plant–pollinator communities, and to examine potential threats to plant diversity and food security if the ecosyste...