Westonbirt Arboretum, Gloucestershire
29 September 2009

Understanding Daylight in the Context of Continuous Cover Forestry


Understanding daylight and the manner in which it affects the growth of trees is not a simple matter. The way in which people perceive the subject is often somewhat vague, and knowledge of the basics can be rather patchy. A better understanding of daylight should put us in a better position to understand what is happening in the forest and how our actions might affect this, particularly when aiming for a low impact, CCF regime. Light is one of the basic tools in the manager’s portfolio, and it is perhaps comforting to know that there will always be a need for experienced practitioners, who can interpret what they see on the ground.

This one day seminar was designed to give practitioners a better understanding of daylight and its role in regeneration and the growth of healthy forests, and included an exploration of technologies which are used to measure daylight

In the morning there was a plenary session and in the afternoon there were field demonstrations using equipment provided by Skye Instruments and Delta-T Services.


File: File Type: Size: Link:
Daylight Conference Programme PDF [93 KB] link
Chairman’s Welcome
[74 KB] link
Review of the Seminar PDF [365 KB] link

What are the main factors in determining the effectiveness of daylight in woodlands?
Rodney Helliwell (Consultant)

PDF [288 KB] link

Variation in light intensity at different latitudes and seasons, effects of cloud cover, and the amounts of direct and diffuse light
Paul Burgess (Cranfield University)

PDF [901 KB] link

Amounts of light required for photosynthesis, and interaction with other abiotic and biotic factors
Maurizio Mencuccini (Edinburgh University)

PDF [2.5 MB] link

Field assessment and estimation of light under various canopy conditions and in gaps
Mathias Disney (University College, London)

PDF [2.3 MB] link

Results of Field Demonstrations

PDF [68 KB] link

Open Discussion
Chaired by Andy Poore (Consultant)

PDF [146 KB] link

Summing up: review of need for further studies, publications and training
Graham Gill (Forest Enterprise, Kielder)

PDF [97 KB] link

*To download the files, right-click on the above links and choose “Save As” to download.


We are grateful for the generous support of:

White Fir, Sierra Nevada. Figure from Jupp et al. (2009) Estimating forest LAI profiles and structural parameters using a ground-based laser called Echidna, Tree Physiology 29(2) 171-181 (as shown in Mathias Disney’s talk)
CCFG Conference   
Llanidloes, Wales
Wednesday, 1 October 2008

Silvicultural Systems for Tomorrow!


This study day focused on silvicultural systems that have application in Wales, and more generally in woodlands of the UK. Policy and social dimensions of new technical developments in silviculture were also highlighted.


  • The Wales Woodland Strategy Review, taking place in 2008, will raise opportunities to further progress the principles of multi-functional and ‘close to nature’ forests.
  • The emphasis for forestry in Wales is to provide woodlands that sustain economic, environmental and social values for current and future generations.
  • New forestry practices must be developed and tested to create a strong, self-sustaining natural resources sector in Wales.
  • The general public in Wales need to be assured that their forests can fulfil their stated wishes and are “fit for purpose”.
  • Technical and scientific information needs to be highlighted to aid practitioners.

Objectives of The Workshop:

  1. To review the major silvicultural systems that have potential application in Wales, and those likely to meet the requirements of the Wales Woodland Strategy.
  2. To highlight operational best practice for taking forward alternative silvicultural systems to clear-felling and systems that transform forest stands from an even-aged to irregular structure.
  3. To review policy and social dimensions that influence silvicultural practice and the choice of silvicultural systems.
  4. To discuss opportunities and constraints for wider adoption of CCF silvicultural systems, with an emphasis on conditions in Wales.

The programme included presentations by leading experts in silviculture, forest policy and social science.



File Type:



Workshop Flyer


269 KB


Workshop Programme


56 KB


Gary Kerr (Forest Research)
Silvicultural Systems

MS PowerPoint

3.7 MB


Arne Pommerening (Bangor University)
Best Practice


5 MB


Anna Lawrence (Forest Research)
Social Dimensions

External Link



Please note that these downloads are provided for CCFG members. This material is not to be distributed without permission of the authors/contributors. Please seek advice if you are uncertain about appropriate usage.

CCFG would like to acknowledge Jim Ralph for organising this event. Thanks, Jim!

If you would like any further information, please contact the CCFG Administrator: administrator@ccfg.org.uk

CCFG Event
Date: 16 April 2008

Location: Stourhead (Western) Estate, Wiltshire


Forest Inventory for Continuous Cover Forestry and Carbon Accounting.