This volume is based on papers presented at "The Norway/United Nations (UN) Conference on Alien Species" which was hosted by the Norwegian Ministry of the Environment in collaboration with the United Nations Environment Programme (UNEP), the Secretariat of the Convention on Biological Diversity, the United Nations Educational, Scientific and Cultural Organisation (UNESCO), the International Conservation Union (lDCN) and the Scientific Committee on Problems of the Environment (SCOPE) of the International Council of Scientific Unions (ICSU). The organisation and sponsoring of the conference was also a joint venture between the Norwegian Ministry of Environment, the Ministry of Agriculture, the Ministry of Fisheries and the Ministry of Foreign Affairs. The Conference was held at Royal Garden Hotel, Trondheim, Norway, 1-5 July 1996. This was the second Trondheim Conference on Biodiversity, the first being the NorwaylUNEP Expert Conference on Biodiversity, 24-28 May 1993. The conference was organised by the Norwegian Directorate of Nature Management, the Norwegian Institute for Nature Research (NINA) and the Norwegian University for Science and Technology (NTNU) and its Centre for Environment and Development (SMU), all based in Trondheim. These institutions are all active in the fields of management, education and research related to biological diversity. Weare extremely grateful for the support we have received from all these national and international institutions.

This volume presents a unique set of time series data concerning the environmental and biological dynamics of a pristine alpine - boreal river system in Norway. A simultaneous collection of data on climate, hydrology, erosion, water chemistry, primary production, invertebrates and fish provides an unusual insight into the ecology of a watercourse characteristic of this region of north-western Europe. Individual papers present data collected over 14 years, which provides an opportunity to understand the natural dynamics in a system with very little direct influence from human activities. The results indicate a level of variation that should be expected in natural systems, and provides a solid basis for a discussion of the best approach to the monitoring of biological diversity and environmental factors in rivers and lakes. The volume is aimed at researchers working with watershed management and aquatic sciences. It provides useful information and experiences of particular relevance to the implementation of the EU Frame Directive for Water.

This volume presents a unique set of time series data concerning the environmental and biological dynamics of a pristine alpine - boreal river system in Norway. A simultaneous collection of data on climate, hydrology, erosion, water chemistry, primary production, invertebrates and fish provides an unusual insight into the ecology of a watercourse characteristic of this region of north-western Europe. Individual papers present data collected over 14 years, which provides an opportunity to understand the natural dynamics in a system with very little direct influence from human activities. The results indicate a level of variation that should be expected in natural systems, and provides a solid basis for a discussion of the best approach to the monitoring of biological diversity and environmental factors in rivers and lakes. The volume is aimed at researchers working with watershed management and aquatic sciences. It provides useful information and experiences of particular relevance to the implementation of the EU Frame Directive for Water.

This volume is based on papers presented at "The Norway/United Nations (UN) Conference on Alien Species" which was hosted by the Norwegian Ministry of the Environment in collaboration with the United Nations Environment Programme (UNEP), the Secretariat of the Convention on Biological Diversity, the United Nations Educational, Scientific and Cultural Organisation (UNESCO), the International Conservation Union (lDCN) and the Scientific Committee on Problems of the Environment (SCOPE) of the International Council of Scientific Unions (ICSU). The organisation and sponsoring of the conference was also a joint venture between the Norwegian Ministry of Environment, the Ministry of Agriculture, the Ministry of Fisheries and the Ministry of Foreign Affairs. The Conference was held at Royal Garden Hotel, Trondheim, Norway, 1-5 July 1996. This was the second Trondheim Conference on Biodiversity, the first being the NorwaylUNEP Expert Conference on Biodiversity, 24-28 May 1993. The conference was organised by the Norwegian Directorate of Nature Management, the Norwegian Institute for Nature Research (NINA) and the Norwegian University for Science and Technology (NTNU) and its Centre for Environment and Development (SMU), all based in Trondheim. These institutions are all active in the fields of management, education and research related to biological diversity. Weare extremely grateful for the support we have received from all these national and international institutions.

This volume presents a unique set of time series data concerning the environmental and biological dynamics of a pristine alpine - boreal river system in Norway. A simultaneous collection of data on climate, hydrology, erosion, water chemistry, primary production, invertebrates and fish provides an unusual insight into the ecology of a watercourse characteristic of this region of north-western Europe. Individual papers present data collected over 14 years, which provides an opportunity to understand the natural dynamics in a system with very little direct influence from human activities. The results indicate a level of variation that should be expected in natural systems, and provides a solid basis for a discussion of the best approach to the monitoring of biological diversity and environmental factors in rivers and lakes. The volume is aimed at researchers working with watershed management and aquatic sciences. It provides useful information and experiences of particular relevance to the implementation of the EU Frame Directive for Water.

This volume presents a unique set of time series data concerning the environmental and biological dynamics of a pristine alpine - boreal river system in Norway. A simultaneous collection of data on climate, hydrology, erosion, water chemistry, primary production, invertebrates and fish provides an unusual insight into the ecology of a watercourse characteristic of this region of north-western Europe. Individual papers present data collected over 14 years, which provides an opportunity to understand the natural dynamics in a system with very little direct influence from human activities. The results indicate a level of variation that should be expected in natural systems, and provides a solid basis for a discussion of the best approach to the monitoring of biological diversity and environmental factors in rivers and lakes. The volume is aimed at researchers working with watershed management and aquatic sciences. It provides useful information and experiences of particular relevance to the implementation of the EU Frame Directive for Water.