Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/23243
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dc.contributor.advisorJump, Alistair-
dc.contributor.advisorWillby, Nigel-
dc.contributor.authorFlint, Gillian F-
dc.date.accessioned2016-05-31T09:53:30Z-
dc.date.issued2015-11-
dc.identifier.urihttp://hdl.handle.net/1893/23243-
dc.description.abstractThe genetic diversity and genetic structure of populations, and the processes shaping gene flow within and between populations, are influenced by the landscapes they occur within. Within terrestrial landscapes, rivers and their riparian habitat are among the most dynamic, diverse and complex of landscapes and their linear structure appears as an interlinking feature across large landscapes. This thesis took a landscape genetics approach to examine the influence of river landscape features on Alnus glutinosa populations, a widespread keystone tree species of European riparian ecosystems. By accounting for the differing dispersal mechanisms of A. glutinosa (wind and water), landscape effects on seed- and pollen-mediated gene flow, genetic diversity, demographic and genetic structure were identified at different spatial scales of a large UK river catchment. Widespread gene flow within and between A. glutinosa populations was identified with no apparent limitation of wind-mediated pollen dispersal. Hydrochorous dispersal of seed between populations was evident, and found to increase genetic connectivity between riparian populations; however an isolation by distance effect was identified between populations located further apart from each other. No pattern of genetic diversity was found, with high levels of genetic diversity identified at all spatial and temporal scales. At the river-catchment scale no genetic clustering was observed, either within or between the six rivers studied. Demographic structuring within A. glutinosa populations was evident, and correlated with distance from the main river channel. Interactions between seed dispersal, hydrological disturbance, colonisation, and historical influences are discussed in relation to fine-scale spatial genetic structure between A. glutinosa sapling and adult generations. Central to the landscape genetics approach taken in this thesis was the incorporation of key A. glutinosa life history attributes. By incorporating gene flow analyses, species ecology and landscape features, the research presented here furthers our understanding of riverine landscape influences on their riparian populations at different spatial scales and can be used to inform management principles.en_GB
dc.language.isoenen_GB
dc.publisherUniversity of Stirlingen_GB
dc.subjectAlnus glutinosaen_GB
dc.subjectalderen_GB
dc.subjectgenetic diversityen_GB
dc.subjectspatial genetic structureen_GB
dc.subjectlandscape geneticsen_GB
dc.subjectgene flowen_GB
dc.subjectparentageen_GB
dc.subjectpollen dispersalen_GB
dc.subjectseed dispersalen_GB
dc.subjectisolation by distanceen_GB
dc.subjectriparianen_GB
dc.subjectwoodlanden_GB
dc.subject.lcshAlnus glutinosaen_GB
dc.subject.lcshLandscape ecologyen_GB
dc.subject.lcshEcological geneticsen_GB
dc.subject.lcshSeeds Dispersalen_GB
dc.subject.lcshSteam ecologyen_GB
dc.titleLandscape genetics of Alnus glutinosa across contrasting spatial scales in a natural river systemen_GB
dc.typeThesis or Dissertationen_GB
dc.type.qualificationlevelDoctoralen_GB
dc.type.qualificationnameDoctor of Philosophyen_GB
dc.rights.embargodate2017-04-31-
dc.rights.embargoreasonArticles to be written for publicationen_GB
dc.author.emailflintypea@yahoo.co.uken_GB
dc.rights.embargoterms2017-05-01en_GB
dc.rights.embargoliftdate2017-05-01-
Appears in Collections:Biological and Environmental Sciences eTheses

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