Distributional Characteristics of Lianas: Example of Hedera helix, Drayton Wood, Norwich

dc.contributor.authorMercer, Theresaen
dc.contributor.departmentEnvironmental Scienceen
dc.date.accessioned2016-06-27T19:03:51Zen
dc.date.available2016-06-27T19:03:51Zen
dc.date.issued2003-01en
dc.description.abstractThe principal objective of this project was to determine whether Hedera helix was distributed randomly or exhibited host preferences within Drayton Wood, Norwich. 200 random tree samples >10cm diameter were studied. Of these, the CBH (circumference breast height), bark texture, abundance of H. helix and growth form were recorded. The percentage of ground covered by H. helix around the base of the sample trees was also recorded. Finally, the distance of the sample trees from the outer reaches of the wood and canopy cover were measured.Hedera helix was not distributed over potential host trees homogenously, but exhibited host associations. Quercus robur, Crataegus monogyna and Pinus sylvestris tree species were found to have a higher abundance of H. helix than expected by chance, whereas Acer pseudoplatanus and Betula pendula were found to have less H. helix vines than expected. Furthermore juvenile and mature vines were not distributed equally. Acer pseudoplatanus hosted more juveniles and less adults than expected, whereas Quercus robur and Pinus sylvestris hosted less juveniles and more mature vines than expected. Vines were not distributed independently of host size. Those trees <100cm CBH had a lesser stem abundance than expected, whereas those vines >100cm CBH had a greater stem abundance than expected. Host preference was exhibited for those large CBH trees with rough bark as opposed to large CBH trees with smooth bark. There was a higher abundance of H. helix (ground and trunk cover) with distance from the edge. Ground cover was greater under those trees hosting H. helix than those not supporting H. helix.Light did not play a major role in the distribution and abundance of H. helix (ground cover and trunk cover).Key Words: host selectivity, host size, bark texture, ground cover, location, light.en
dc.format.mimetypeapplication/msworden
dc.format.mimetypetext/htmlen
dc.identifiereprint:307en
dc.identifier.urihttp://hdl.handle.net/10919/71578en
dc.language.isoenen
dc.publisherUniversity of East Angliaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectHedera helixen
dc.subjectdistributional characteristicsen
dc.subjecthost sizeen
dc.subjectbark textureen
dc.subjectground coveren
dc.subjectlocationen
dc.subjectLighten
dc.subjecthost selectivityen
dc.subject.lccQKen
dc.subject.lccGEen
dc.titleDistributional Characteristics of Lianas: Example of Hedera helix, Drayton Wood, Norwichen
dc.typeThesisen
thesis.degree.grantorUniversity of East Anglia, UKen
thesis.degree.levelotheren

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