Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/7241

Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Pollination biology of fruit-bearing hedgerow plants and the role of flower-visiting insects in fruit-set
Authors: Jacobs, Jennifer H
Clark, Suzanne J
Denholm, Ian
Goulson, Dave
Stoate, Chris
Osborne, Juliet L
Contact Email: dave.goulson@stir.ac.uk
Keywords: Blackthorn
bramble
Crataegus monogyna
frugivorous birds
hawthorn
Hedera helix
hedgerows
ivy
insect pollination
Prunus spinosa
Rubus fruticosus
Rosa canina
Issue Date: Dec-2009
Publisher: Oxford University Press
Citation: Jacobs JH, Clark SJ, Denholm I, Goulson D, Stoate C & Osborne JL (2009) Pollination biology of fruit-bearing hedgerow plants and the role of flower-visiting insects in fruit-set, Annals of Botany, 104 (7), pp. 1397-1404.
Abstract: Background and Aims: In the UK, the flowers of fruit-bearing hedgerow plants provide a succession of pollen and nectar for flower-visiting insects for much of the year. The fruits of hedgerow plants are a source of winter food for frugivorous birds on farmland. It is unclear whether recent declines in pollinator populations are likely to threaten fruit-set and hence food supply for birds. The present study investigates the pollination biology of five common hedgerow plants: blackthorn (Prunus spinosa), hawthorn (Crataegus monogyna), dog rose (Rosa canina), bramble (Rubus fruticosus) and ivy (Hedera helix). Methods: The requirement for insect pollination was investigated initially by excluding insects from flowers by using mesh bags and comparing immature and mature fruit-set with those of open-pollinated flowers. Those plants that showed a requirement for insect pollination were then tested to compare fruit-set under two additional pollination service scenarios: (1) reduced pollination, with insects excluded from flowers bagged for part of the flowering period, and (2) supplemental pollination, with flowers hand cross-pollinated to test for pollen limitation. Key Results: The proportions of flowers setting fruit in blackthorn, hawthorn and ivy were significantly reduced when insects were excluded from flowers by using mesh bags, whereas fruit-set in bramble and dog rose were unaffected. Restricting the exposure of flowers to pollinators had no significant effect on fruit-set. However, blackthorn and hawthorn were found to be pollen-limited, suggesting that the pollination service was inadequate in the study area. Conclusions: Ensuring strong populations of insect pollinators may be essential to guarantee a winter fruit supply for birds in UK hedgerows.
Type: Journal Article
URI: http://hdl.handle.net/1893/7241
DOI Link: http://dx.doi.org/10.1093/aob/mcp236
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Rothamsted Research
Rothamsted Research
Rothamsted Research
Biological and Environmental Sciences
The Allerton Research and Educational Trust
Rothamsted Research

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