Sangam: A Confluence of Knowledge Streams

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

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dc.contributor Environmental Science
dc.creator Mercer, Theresa
dc.date 2016-06-27T19:03:51Z
dc.date 2016-06-27T19:03:51Z
dc.date 2003-01
dc.date.accessioned 2023-03-03T18:51:56Z
dc.date.available 2023-03-03T18:51:56Z
dc.identifier eprint:307
dc.identifier http://hdl.handle.net/10919/71578
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/282056
dc.description The 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.
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dc.format text/html
dc.format application/msword
dc.format text/html
dc.language en
dc.publisher University of East Anglia
dc.rights In Copyright
dc.rights http://rightsstatements.org/vocab/InC/1.0/
dc.subject Hedera helix
dc.subject distributional characteristics
dc.subject host size
dc.subject bark texture
dc.subject ground cover
dc.subject location
dc.subject Light
dc.subject host selectivity
dc.subject QK
dc.subject GE
dc.title Distributional Characteristics of Lianas: Example of Hedera helix, Drayton Wood, Norwich.
dc.type Thesis


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