Michael Köhl – författare

The Global Biodiversity Strategy, signed in 1992 in Rio de Janeiro, and the resolutions at the Ministerial Conferences on the Protection of Forests in Europe in Strasbourg, 1990, and Helsinki, 1993, commit the signatory states to monitor nationally the state of biodiversity and to sustain the characteristic natural variation in the country. Sustainability and long-term planning are the two terms which best describe the philosophy of traditional forest management practices. However, the traditional planning techniques are not primarily developed to maintain sustainability of biodiversity. The gap between the international commitments and the practices in forest assessment and management is obvious. This publication presents experience in methodology for assessing and monitoring the variation of ecosystems and habitats in relation to biodiversity conservation and for integrating biodiversity in regional planning of forest management and land use.The state of the field of natural resource assessments with special reference to forest biodiversity is reviewed; progress in integrating data on biodiversity in forest management planning is presented; and the information needs regarding biodiversity conservation and the question to what degree assessment methods for forest biodiversity can be simplified for practical applications are discussed. The book is intended for researchers and practitioners in the field of forest and environmental planning and environmental policies.

The increasing awareness and concern of people, researchers and decision makers for the maintenance and enhancement of goods and services provided by forest ecosystems significantly widened the scope of information needs for sustainable forest management on the task-specific, integrative and strategic level. Forest resource assessments have to provide reliable, harmonized, politically relevant, cost-efficient and intuitively visible information on the multiple functions of forests in the form of statistics, georeferenced data and thematic cartography. In this perspective, the need of reviewing and discussing improvements of forest inventory and monitoring approaches is acknowledged to cope with assessment and analysis tools required for the full understanding of forest ecosystems, from local to global scales. Only a limited amount of information can be provided by adding a set of new attributes to the list of attributes commonly used in assessing the productive function of forests and utilizing traditional survey designs. The diversity of information needs that have to be satisfied by current forest resource assessments require the adoption of new survey approaches and the extensio

This book presents the state-of-the-art knowledge on bamboo.  It starts with an introduction to the plant’s biology, its taxonomy, habitat, morphology and growth. The cultivation of bamboo is discussed in terms of silviculture, pests and diseases, and harvesting techniques. The book is completed by a comprehensive presentation of the properties of bamboo, its utilization and its preservation.Bamboo is the fastest-growing and most versatile plant on Earth. For centuries it has played an indispensible part in the daily life of millions of people in tropical countries. In recent decades it has gained increasing importance as a substitute for timber.The book was developed as a reference text for scientists, professionals, and graduate students with a strong interest in this unique plant.

This book presents the state-of-the-art knowledge on bamboo. The book is completed by a comprehensive presentation of the properties of bamboo, its utilization and its preservation. Bamboo is the fastest-growing and most versatile plant on Earth.

Bridging the gap between basic science and technological applications, this is the first book devoted to polymers for solar thermal applications. Clearly divided into three major parts, the contributions are written by experts on solar thermal applications and polymer scientists alike. The first part explains the fundamentals of solar thermal energy especially for representatives of the plastics industry andresearchers. Part two then goes on to provide introductory information on polymeric materials and processing for solar thermal experts. The third part combines both of these fields, discussing the potential of polymeric materials in solar thermal applications, as well as demands on durability, design and building integration. With its emphasis on applications, this monograph is relevant for researchers at universities and developers in commercial companies.

When we talk about forests, we talk about 30% of our planet’s land surface 6 area. In 2000 there was an estimated 3 870×10 ha of forest worldwide, of which 1 5% is in forest plantations and 95% in natural forests (FAO 2003). Forests are not only a source for timber; they also generate significant nonwood goods and services, mitigate climate change, conserve biological diversity, provide prot- tion from natural hazards, and not least: provide recreational areas for an increasingly urbanized world population. The availability of timber and n- wood goods and services is waning as deforestation and degradation of tro- cal forests continue. While forest area has stabilized or is slightly increasing in the boreal and temperate regions, the annual loss of forest area in the tropics and subtropics is decreasing. Between 1990 and 2000 the annual rate of defor- 6 estation was estimated to be 14. 6×10 ha (approximately 0. 38%) and took place mainly in tropical and subtropical forests (FAO 2003). The net annual rate of 6 change is about 9. 4×10 ha (0. 2%). Maintaining and enhancing forest areas and the vitality of forest ecosystems is a widely accepted political goal, which is often opposed by conflicting demands of various stakeholders.

The recent debate on forest decline and possible climatic changes emphasized the need of growth studies. In the 1980s several studies reported a reduction of forest growth, whereas other studies resulted in quite opposite findings. A study conducted under the auspices of the European Forest Institute (EFI) on forest resources in Europe between 1950 and 1990 showed a remarkable increase in growing stock. In 1993 EFI started a follow-up project on "Growth Trends in European Forests", which focused on the evaluation of available data at the European level. This publication presents the results of the project compiling studies in 12 European countries. Summarizing the individual studies, an increasing growth trend can be observed in most cases, apart from some specific sites.

When we talk about forests, we talk about 30% of our planet’s land surface 6 area. In 2000 there was an estimated 3 870×10 ha of forest worldwide, of which 1 5% is in forest plantations and 95% in natural forests (FAO 2003). Forests are not only a source for timber; they also generate significant nonwood goods and services, mitigate climate change, conserve biological diversity, provide prot- tion from natural hazards, and not least: provide recreational areas for an increasingly urbanized world population. The availability of timber and n- wood goods and services is waning as deforestation and degradation of tro- cal forests continue. While forest area has stabilized or is slightly increasing in the boreal and temperate regions, the annual loss of forest area in the tropics and subtropics is decreasing. Between 1990 and 2000 the annual rate of defor- 6 estation was estimated to be 14. 6×10 ha (approximately 0. 38%) and took place mainly in tropical and subtropical forests (FAO 2003). The net annual rate of 6 change is about 9. 4×10 ha (0. 2%). Maintaining and enhancing forest areas and the vitality of forest ecosystems is a widely accepted political goal, which is often opposed by conflicting demands of various stakeholders.

This book provides a cross-section of all outstanding experience in all fields of tropical forestry under a drastically changing environment induced by climate change. It sheds light on the existing know-how and presents it in a concise and efficient way for the scientist and professional in charge of planning, implementing and evaluating forest resources. The Tropical Forestry Handbook provides proven and/or promising alternative concepts which can be applied to solve organizational, administrative and technical challenges prevailing in the tropics. Presented are state of the art methods in all fields concerning tropical forestry. Emphasis is given to methods which are adapted to- and which safeguard - environmental conditions.

The European Forest Institute (EFI) has five Research and Development priority ar­ eas: forest sustainability, forestry and possible climate change, structural changes in markets for forest products and services, policy analysis, and forest sector informa­ tion services and research methodology. In the area of forest sustainability our most important activity has been the project "Growth trends of European forests", the re­ sults of which are presented in this book. The project was started in August 1993 under the leadership of Prof. Dr. Heinrich Spiecker from the University of Freiburg, Germany, and it is one of the first EFI's research projects after its establishment in 1993. The main purpose of the project was to analyse whether site productivity has changed in European forests during the last decades. While several forest growth studies have been published at local, re­ gional and national levels, this project has aimed at stimulating a joint effort in iden­ tifying and quantifying possible growth trends and their spatial and temporal extent at the European level. Debate on forest decline and possible climate change, as well as considerations re­ lated to the long term supply of wood underline the importance of this project, both from environmental and industrial points of view. Knowledge on possible changes in growth trends is vital for the sustainable management of forest ecosystems.

The `Global Biodiversity Strategy' signed in 1992 in Rio de Janeiro, and the resolutions at the Ministerial Conferences on the Protection of Forests in Europe in Strasbourg, 1990, and Helsinki, 1993, commit the signatory states to monitor nationally the state of biodiversity and to sustain the characteristic natural variation in the country. Sustainability and long-term planning are the two terms best describing the philosophy of traditional forest management practices. However, the traditional planning techniques are not primarily developed to maintain sustainability of biodiversity. The gap between the international commitments and the practices in forest assessment and management is obvious. This publication presents experience in methodology for assessing and monitoring the variation of ecosystems and habitats in relation to biodiversity conservation and for integrating biodiversity in regional planning of forest management and land use. The state of the art in the field of natural resource assessments with special reference to forest biodiversity is reviewed, progress in integrating data on biodiversity in forest management planning is presented and the information needs regarding biodiversity conservation and the question to what degree assessment methods for forest biodiversity can be simplified for practical applications are discussed. The book is intended for researchers and practitioners in the field of forest and environmental planning and environmental policies.

The increasing awareness and concern of people, researchers and decision makers for the maintenance and enhancement of goods and services provided by forest ecosystems significantly widened the scope of information needs for sustainable forest management on the task-specific, integrative and strategic level. Forest resource assessments have to provide reliable, harmonized, politically relevant, cost-efficient and intuitively visible information on the multiple functions of forests in the form of statistics, georeferenced data and thematic cartography. In this perspective, the need of reviewing and discussing improvements of forest inventory and monitoring approaches is acknowledged to cope with assessment and analysis tools required for the full understanding of forest ecosystems, from local to global scales. Only a limited amount of information can be provided by adding a set of new attributes to the list of attributes commonly used in assessing the productive function of forests and utilizing traditional survey designs.The diversity of information needs that have to be satisfied by current forest resource assessments require the adoption of new survey approaches and the extension of assessment frames from forests to landscapes. This is deemed distinctively true for the issues related to sustainable forest management and biodiversity monitoring. Within this framework, the major purpose of this volume of Kluwer's "Forestry Science Series" is to give readers hands-on experiences about inventory and monitoring problems and potential by reviewing a selection of approaches, methods and tools for multi-resource forest surveys, with special reference to remote sensing, statistical sampling and spatial analyses. The book is intended for researchers and practitioners in the field of forest and environmental planning, environmental monitoring and environmental policies.