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Modeling Harmonia axyridis interactions within the aphidophagous guild

Comont, Richard; Harrington, Richard; Lewis, Owen T.; Purse, Bethan; Roy, Helen. 2009 Modeling Harmonia axyridis interactions within the aphidophagous guild. [Poster] In: 1st meeting of the IOBC/WPRS study group "Benefits & risks associated with exotic biological control agents": Harmonia axyridis and other invasive ladybirds, Engelberg, Switzerland, 6-10th September 2009.

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Abstract/Summary

The rapid spread of Harmonia axyridis across the British Isles is predicted to impact native coccinellids through direct competition and intra-guild predation. Additionally, the population dynamics and seasonal overlap of coccinellids with their aphid prey is likely to be affected by climate change. The combined effects of these two factors could alter relationships within the aphidophagous guild. Here we describe methods to quantify the impact of H. axyridis on temporally and spatially overlapping and non-overlapping native coccinellids, quantifying the relative role of top-down, bottom-up and abiotic factors in driving native coccinellid dynamics. Specifically, changes in coccinellid community composition and the functional responses of coccinellids to the abundance of different prey species will be investigated, and long-term datasets will be used to analyse coccinellid and aphid temporal-spatial dynamics in relation to climate, using climate envelope models to assess the role of climate change on coccinellid-prey interactions. The ultimate aim is to quantify responses of native coccinellids to H. axyridis, accounting for species’ differing specialisations.

Item Type: Publication - Conference Item (Poster)
Programmes: CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 1 - Observations, Patterns, and Predictions for Biodiversity
CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 2 - Ecological Processes in the Environment
CEH Sections: Watt
Pywell
Additional Information. Not used in RCUK Gateway to Research.: Subsequently published as a chapter in: Proceedings of the first meeting on “Harmonia axyridis and other ladybirds”
NORA Subject Terms: Ecology and Environment
Biology and Microbiology
Date made live: 18 Feb 2010 14:13
URI: http://nora.nerc.ac.uk/id/eprint/8348

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