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Continuous Cover Forestry
85 year old stand of Douglas fir in the process of transformation to a continuous cover forest
The term continuous cover forestry has been widely adopted in British forestry practice following the creation of the Continuous Cover Forestry Group in 1991. Currently the UK Forestry Standard and the guidelines of the silvicultural-systems UK Woodland Assurance Standard call for wider use and application of CCF in British forestry, as there is evidence that continuously productive irregular structured woodlands are more robust and resilient in response to climate change, and forest health threats in addition to a wide range of other social and environmental benefits. However, there remains some lack of understanding of the definition and practice of CCF among forestry professionals in Britain, and Ireland.
CCF is an approach to forest management which respects the characteristics and processes inherent to the site, and will normally involve a mixture of tree species and ages. In French, it is referred to as sylviculture irrégulière, continue et proche de la nature (SICPN) (i.e., continuous, irregular and close to nature silviculture), and in German as Dauerwald, or naturgemässe waldwirtschaft (close to nature forestry). Management is based on the selection and promotion of individual trees, of all sizes, rather than the creation of areas with trees of uniform size. Any monitoring of the development of irregular stand structures will be achieved through periodic re-measurement of stem diameters in sample plots or across whole stands. Repeated interventions, typically at intervals of between 3 and 7 years, focus on the removal of trees which are interfering with the growth of trees with greater potential, the harvesting of crop trees at their optimum size, and the promotion of regeneration and small trees, such that an irregular stand structure is maintained in perpetuity.
Regeneration will normally be by the growth of naturally-regenerated seedlings rather than by planting.Artificial regeneration (especially enrichment planting) may be needed to diversify the genetic and species composition, and to increase ecological resilience to threats from climate change, pests, or disease.
The general approach to CCF can be outlined in terms of the following underlying principles, as defined by the Continuous Cover Forestry Group (CCFG):
Adapt the forest to the site - The forest manager works with the site and respects inherent variation, rather than imposing artificial uniformity.
Adopt a holistic approach - The whole ecosystem is regarded as the production capital of the forest, including soil, carbon, water, fungi, flora, fauna, as well as the trees themselves.
Develop the forest structure - Stand improvement is concentrated upon the development of preferred individual trees rather than the creation of a uniform block of stems. A characteristic of permanently irregular stands is that yield control is based upon measurement of stem diameter and increment rather than age and area.
These principles link to a rapidly developing evidence-base, from the UK, Ireland, continental Europe and elsewhere, in relation to managing irregularly structured woodlands and forests.
^CCFG (2014) Continuous Cover Forestry: Delivering sustainable and resilient woodlands in Britain. Conference Report. Continuous Cover Forestry Group, National Conference, Braithwaite Institute, Cumbria. 3-4 June 2014. 21 pp. 
^Vítková, L., Á. Ní Dhubháin and V. Upton. (2014). Forestry professionals' attitudes and beliefs in relation to, and understanding of continuous cover forestry. Scottish Forestry 68(3): 17-25. 
^ abTurckheim, Brice de, M. Bruchiamacchie. (2005) La futaie irrégulière: Théorie et pratique de la sylviculture irrégulière, continue et proche de la nature. Avignon: Edisud. 282 p.
^ abcdPommerening, A., and S.T. Murphy. (2004). A review of the history, definitions and methods of continuous cover forestry with special attention to afforestation and restocking.Forestry 77(1): 37-44 
^Poore, A. (2007). CCF at Stourhead - Final Report. Continuous Cover Silviculture & Mensuration in Mixed Conifers at the Stourhead (Western) Estate, Wiltshire, UK. Technical Report. SelectFor. 39 p. 
^Deffee, R. (2014). Continual Inventory for Irregular Forest Stands. , Cranborne Woodlands. Technical Report. SelectFor. 46 p. 
^Wilson, S. McG. (2013). Progress of adoption of alternative silvicultural systems in Britain: an independent review. Technical Report. Supported by the Forestry Commission and Scottish Forestry Trust. 49 p. 
^Ní Dhubháin, Á. 2010. An evaluation of continuous cover forestry in Ireland. COFORD, Department of Agriculture, Fisheries and Food, Dublin.36 p.