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dc.contributor.advisorGormally, Michael
dc.contributor.advisorSmith, Cindy
dc.contributor.authorReich, Inga
dc.date.accessioned2016-04-05T07:34:38Z
dc.date.issued2016-04-04
dc.identifier.urihttp://hdl.handle.net/10379/5631
dc.description.abstractGeomalacus maculosus is an EU protected Lusitanian slug species which is only found in Ireland and Northern Iberia. It inhabits largely undisturbed habitats such as blanket bogs and forests where it feeds on lower plants growing on tree trunks or rocks. A phylogenetic study was carried out with a view to assess the genetic variability throughout the species’ range and to determine the origin of the Irish population. It was shown that the Irish G. maculosus population has a low genetic variability compared to the highly structured Iberian populations and a great genetic similarity to specimens from Northern Asturias and Cantabria was observed. A mark-recapture study using visible implant elastomers as markers was carried out for the duration of one year to assess the methodology and to investigate habitat requirements and population dynamics of G. maculosus and of the sympatric slug species Lehmannia marginata. Their population densities were found to be highly variable and a thick epiphyte cover of the trunk was identified as an important factor for both species. Capture success was heavily influenced by weather conditions and the employed markers were found to be durable and easy to use. The microbial diversity within the faeces of Irish G. maculosus specimens was explored with view to identifying habitat specific and core microbiome members. The influence of kinship, diet and environment on the composition of their faecal microbiome was investigated. The microbial communities were found to be highly variable indicating that their composition is heavily influenced by the bacteria present in the species’ microhabitat. Two core OTUs were found within all slugs which are likely beneficial symbionts of G. maculosus and we suggest that they could have been vertically transmitted from the egg.en_IE
dc.subjectGeomalacus maculosusen_IE
dc.subjectLusitanian distributionen_IE
dc.subjectMark-recaptureen_IE
dc.subjectFaecal microbiomeen_IE
dc.subjectKerry slugen_IE
dc.subjectApplied ecologyen_IE
dc.subjectMicrobiologyen_IE
dc.subjectNatural sciencesen_IE
dc.titleThe EU-protected slug geomalacus maculosus: an investigation into its phylogenetics, population densities in conifer plantations and its gut microbial communityen_IE
dc.typeThesisen_IE
dc.contributor.funderHardiman Scholarshipen_IE
dc.contributor.funderIrish Research Councilen_IE
dc.contributor.funderNational Parks and Wildlife Serviceen_IE
dc.contributor.funderThomas Crawford Hayes Research Trust Funden_IE
dc.local.noteThe Irish Geomalacus maculosus was most likely introduced from the North of Spain after the last glacial maximum. The mark-recapture method is suitable for comparing population sizes of the species before and after forestry management operations. Only two bacterial phylotypes have been found in the faeces of all investigated slugs.en_IE
dc.description.embargo2020-04-01
dc.local.finalYesen_IE
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