Reprinted from Hydrobiologia, 521.
The Atna River: Studies in an Alpine-Boreal Watershed 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 Atna River: Studies in an Alpine-Boreal Watershed 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.
Preface: S. Sandøy
1. Introduction to the Atna Research Area; A.M. Tvede, G. Halvorsen.
The Atna Watershed
2. The climate of Atndalen; P.Ø. Nordli, A.A. Grimines
3. Hydrology of Lake Atnsjøen and River Atna; A.M. Tvede
4. Erosion and sediment yield in the Atna river basin; J. Bogen
5. Fish distribution of a mountain area in southeastern Norway: human introductions overrule natural immigration; T. Hesthagen, O.T. Sandlund.
6. Periphyton in running waters - long term studies of natural variation; E.A. Lindstrøm, S.W. Johansen, T. Saloranta
7. Studies of aquatic insects in the Atna River 1987-2002; K. Aagaard, J.O. Solem, T. Bongard, O. Hanssen
8. Age and growth of Siberian sculpin (Cottus poecilopus) and young brown trout (Salmo trutta) in a subalpine Norwegian river; T. Hesthagen, O. Hegge, J. Skurdal, B.K. Dervo
9. Niche overlap between young brown trout (Salmo trutta) and Siberian sculpin (Cottus poecilopus) in a subalpine Norwegian river; T. Hesthagen, R. Saksgård, O. Hegge, B.K. Dervo, J. Skurdal.
10. Some physical and chemical characteristics of Lake Atnsjøen; G. Halvorsen
11. Phytoplankton of Lake Atnsjøen, Norway - a long-term investigation; P. Brettum, G, Halvorsen
12. Zooplankton of Lake Atnsjøen 1985-1997; G. Halvorsen, B.K. Dervo, K. Papinska
13. Annual variability of the life-history characteristics of brown trout (Salmo trutta) and Arctic charr (Salvelinus alpinus) in a subalpine Norwegian lake; T. Hesthagen, T. Forseth, O. Hegge, R. Saksgård, J. Skurdal
14. A 14-year study of habitat use and diet of brown trout (Salmo trutta) and Arctic charr (Salvelinus alpinus) in a subalpine Norwegian lake; R. Saksgård, T. Hesthagen.
15. Long-term monitoring and research in an alpine-boreal watershed: Atndalen in perspective; O. T. Sandlund, K. Aagaard
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