Preface The importance to society of environmental services, provided by forest ecosystems, has significantly increased during the last few decades. A growing global concern with the deterioration of forests, beginning perhaps most noticeably in the 1980s, has led to an increasing public awareness of the environmental, cultural, economic, and social values that forests provide. Around the world, ideas of sustainable, close-to-nature, and multi-functional forestry have progressively replaced the older perception of forests as only a source for timber. The international impetus to protect and sustainably manage forests has come from global initiatives at management, conservation, and sustainable development related to all types of forests and forestry. A few of the more notable initiatives include: • • • • the 1992 Earth Summit in Rio de Janeiro, Brazil (United Nations Conference on Environment and Development, UNCED), regional follow-ups to the Earth Summit such as the Montreal Process and Helsinki Accords, the forest elements of the Convention on Biological Diversity (CBD), and the Framework Convention on Climate Change (FCCC). Since the original Earth Summit, forest management and forest research organizations around the world have been developing and testing new approaches to deliver sustainable forest management in three areas: timber production, environmental and ecosystem management, and social forestry. The subsequent emergence of major international initiatives such as the Montreal Process and the Helsinki Accords and the growing importance accorded to forest certification programs in many countries around the world, attest to international recognition of the importance of sustainable forestry both within the forest sector and for the general public. Concerning the evolution of scientific knowledge to address the challenges posed by sustainable forestry, many disciplines have played important roles in advancing and applying new principles and practices in support of sustainable forest management. In 2003, the editors of this volume, representing diverse sections of the International Union of Forest Research Organizations (IUFRO), began collaborating to organize a trans-disciplinary conference broadly focused on the theory and practice of sustainable forestry. The conference was held during April 2005 in Edinburgh, Scotland (UK), and this volume presents a compilation of what we believe were some of the more significant contributions. The conference addressed four broad themes relevant to sustainable forest management: 1. Science and Policy 2. Inventory and Monitoring 3. Statistics and Modelling 4. Information and Knowledge Management Major advances have been made within each of these themes in recent years. Although the work of each forest resource scientist may tend to fall predominantly within only one of these broad thematic areas, it should require only a little reflection to appreciate that each theme has strong, mutual interdependencies with at least some, if not all, of the others. With that consideration in mind, the major objectives of the conference and the present work were to: 1. Review the current state of the art within each of the four major themes. 2. Foster dialog across thematic areas concerning both strategic and operational approaches to integrate research on sustainable forestry. 3. Enhance and encourage international collaboration towards sustainable forestry practice worldwide. Several organizations have contributed to this volume in terms of committing either financial or staff resources or logistical support. The editorial staff represents IUFRO sections 4.02 (Forest Resources Inventory and Monitoring, 4.03 (Informatics, Modelling, and Statistics), and 6.12 (Forest Policy and Governance) as well as diverse organizations. Other organizations contributing support to the Edinburgh conference in particular include the European Forest Institute, and the Environmental Systems Research Institute, UK. We wish to thank Forest Research for hosting the conference and specifically acknowledge Martin Abrahams, Evelyn Hall, Roz Shields, Liz Poulsom and Louise Sing of Forest Research, Roslin, Midlothian, Scotland, for their invaluable assistance with the local arrangements and logistics for the Edinburgh conference. Finally, the senior editor would like to specifically acknowledge Tiffany Dong (USDA Forest Service, Pacific Northwest Research Station) for her invaluable assistance with assembly of the final CD proceedings product. Keith M. Reynolds, senior editor, USDA Forest Service, USA Alan Thomson, editor, Canadian Forest Service, Natural Resources Canada, Canada Michael Köhl, editor, University of Hamburg, Germany Margaret Shannon, editor, University of New York, Buffalo, USA Duncan Ray, editor, Forest Research, UK Keith Rennolls, editor, University of Greenwich, UK