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Title: Scots pine (Pinus sylvestris L.) seed production at Wybunbury Moss, Cheshire and factors affecting seed germination and early establishment
Author: Mukassabi, Tarek A.
Awarding Body: Keele University
Current Institution: Keele University
Date of Award: 2011
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Abstract:
Scots pine (Pin us sylvestris) growing at Wybunbury Moss, Cheshire on a small floating bog (Schwingmoor) some 400 km south of its current native limit was studied. Seed production of trees that have been growing on the site for several centuries, and the . susceptibility of seed and seedlings to waterlogging were investigated. Cones matured between September and March and seed shedding began in early April. A strong relationship was found between tree size and seed production which allowed the prediction ,,"A "'~'J' .A- of annual seed production. One hectare of woodland surrounding the central bog produced approximately 1 350 000 seeds annually with a germination percentage of 64%. The estimated number of seeds reaching the central bog every year was c. 16 000 seeds. Vegetation type, topography and water table depth were the most important factors dictating germination and seedling success. Three weeks of dry conditions was likely sufficient for Scots pine seedlings to establish whatever the water table level afterwards. Scots pine seeds from Wybunbury had the capability to germinate and survive a water table of up to 4 cm below the surface and often less. Six hummocky microhabitats of Sphagnum, Sphagnum-Ericaceae, Sphagnum-Cyperaceae, Ericaceae, Cyperaceae and Pure peat formed 8, 15, 33, 17, 26 and 1 %, respectively, of the central bog area. Seedling survival in each microhabitat was 2.1, 1.5, 1.6, 1.8, 1.9 and 0.5%, respectively. Adding all these factors together led to the prediction that on the central bog at Wybunbury there should be 200 new juveniles every year. Since a management aim is for this to be <100, suggestions on specific woodland thinning/clearance are made to achieve this target. iii
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.572460  DOI: Not available
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