Application of bioclimatic models coupled with network analysis for risk assessment of the killer shrimp, Dikerogammarus villosus, in Great Britain

In this study we use a combination of techniques to assess the general risk of invasion by the aquatic invader Dikerogammarus villosus in Great Britain at multiple scales. First, bioclimatic models (Support Vector Machine algorithm) were used to identify regions showing the highest climatic match wi...

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Bibliographic Details
Published in:Biological invasions 2012-06, Vol.14 (6), p.1265-1278
Main Authors: Gallardo, Belinda, Errea, M. Paz, Aldridge, David C.
Format: Article
Language:English
Subjects:
Animal populations
Bioclimatology
Biogeography
Biomedical and Life Sciences
Developmental Biology
Dikerogammarus villosus
Dispersal
Ecology
Freshwater & Marine Ecology
Life Sciences
Nonnative species
Original Paper
Plant Sciences
Risk assessment
River catchments
Shellfish
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Summary:In this study we use a combination of techniques to assess the general risk of invasion by the aquatic invader Dikerogammarus villosus in Great Britain at multiple scales. First, bioclimatic models (Support Vector Machine algorithm) were used to identify regions showing the highest climatic match with the European range of the species, and that might be at highest risk of initial colonization if provided with propagules. The model showed that nearly 60% of Great Britain shows the minimum bioclimatic suitability for the species, particularly southern and eastern England. Afterwards, a Network Analysis was used to model the natural spatio-temporal spread of the killer shrimp in the Great Ouse River catchment (SE England), the first region invaded by this species. This model suggested that the northern part of the catchment, including two relevant Ramsar sites (Ouse Washes and Wicken fen) are at serious risk of being invaded in the short-term (
ISSN:1387-3547
1573-1464
DOI:10.1007/s10530-011-0154-0