Journal
SCANDINAVIAN JOURNAL OF FOREST RESEARCH
Volume 32, Issue 6, Pages 473-480Publisher
TAYLOR & FRANCIS AS
DOI: 10.1080/02827581.2016.1247464
Keywords
Bark-stripping; Picea sitchensis; red deer; Scotland; wound healing
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Funding
- NERC [ceh020002] Funding Source: UKRI
- Natural Environment Research Council [ceh020002] Funding Source: researchfish
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The impact of bark-stripping by red deer on an 1825 ha plantation of Picea sitchensis is reported. Monitoring began in 1978 with initially 6500 trees at 37 sites; by 2014, only 10 sites remained due to felling. Sites became vulnerable to bark-stripping once the trees reached 7 years' age, and from then until felling at age c. 45 years, incidence rates averaged 1% of the trees damaged yearly. Intense damage at a site in a year (> 2% trees damaged) was often followed by intense damage next year, but, on average, 53% of sites were undamaged in a year. Many trees suffered repeat wounding, which reduced final impact by c. 30% compared to the theoretical impact calculated from annual damage and damage duration. The trees bark-stripped were on average smaller than plot mean girths once these means exceeded 20 cm; this had only a minor effect on the final impact since bark-stripped small trees had similar mortality to undamaged small trees. Most wounds (> 90%) were small (< 180 cm(2)) and healed quickly, so were unlikely to develop decay. Larger wounds never healed in less than 8 years, but the proportion healed increased progressively from 10 to 20 years after wounding.
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