Reidar borgstrøm (22 risultati)

Condizione: Used. pp. x + 441, Maps, Index.

Condizione: Used. pp. x + 441 Figures, Illus. (Partly Col.), Maps.

Condizione: New.

Condizione: New.

Taschenbuch. Condizione: Neu. Druck auf Anfrage Neuware - Printed after ordering - This book summarizes research from the intensive study of a pristine subalpine lake ecosystem and its catchment over the last 50 years. A wide range of topics is presented, including several unique time series focusing on changes in ice cover, water temperature, zooplankton, benthos and fish. Significant changes in the lake fauna after the introduction of European minnow into an ecosystem where brown trout was the sole fish species have been documented. The area received substantial radioactive fallout from the Chernobyl accident in 1986, and two articles address long-term changes in radiocaesium activity concentrations in allochthonous plant material and in fish. Other topics include palaeoecology, mercury in fish and remote sensing of catchment snows. Such long-term research is crucial in a rapidly changing environment due to the impacts of climate change, long-range pollutants and alien species. This provides a solid basis for future monitoring and management of freshwater ecosystems.The book will not only be of interest to freshwater ecologists working in the field, but also for managers responsible for the protection and monitoring of natural areas. It illustrates the changes now taking place in pristine ecosystems as a result of human activities and will serve as a supplementary text for courses in environmental management.…

Buch. Condizione: Neu. Druck auf Anfrage Neuware - Printed after ordering - This book summarizes research from the intensive study of a pristine subalpine lake ecosystem and its catchment over the last 50 years. A wide range of topics is presented, including several unique time series focusing on changes in ice cover, water temperature, zooplankton, benthos and fish. Significant changes in the lake fauna after the introduction of European minnow into an ecosystem where brown trout was the sole fish species have been documented. The area received substantial radioactive fallout from the Chernobyl accident in 1986, and two articles address long-term changes in radiocaesium activity concentrations in allochthonous plant material and in fish. Other topics include palaeoecology, mercury in fish and remote sensing of catchment snows. Such long-term research is crucial in a rapidly changing environment due to the impacts of climate change, long-range pollutants and alien species. This provides a solid basis for future monitoring and management of freshwater ecosystems.The book will not only be of interest to freshwater ecologists working in the field, but also for managers responsible for the protection and monitoring of natural areas. It illustrates the changes now taking place in pristine ecosystems as a result of human activities and will serve as a supplementary text for courses in environmental management.…

Taschenbuch. Condizione: Neu. The subalpine lake ecosystem, Øvre Heimdalsvatn, and its catchment: local and global changes over the last 50 years | John E. Brittain (u. a.) | Taschenbuch | v | Englisch | 2014 | Springer | EAN 9789401781992 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu. …

Condizione: Sehr gut. Zustand: Sehr gut | Sprache: Englisch | Produktart: Bücher | environmental variables are estimated and then applied to fossil assemblages under the assumption Plant and animal remains are often found well that the biota is in equilibrium with concurring preserved and in large quantities as fossils in lake environmental conditions. We have used fossil pollen sedimentary deposits. The composition of the fossil assemblages to reconstruct changes in past mean July assemblages, the biological proxies, can be used to air temperatures and changes in mean annual prec- infer environmental conditions at the time of de- itation (Birks & Birks, 2003). Plant macrofossils were sition. This is based on the uniformitarian assumption used to con?rm and to give more robust interpre- that particular species assemblages of the past have tions about past vegetation and climate than the been shaped by speci?c sets of environmental pollen evidence alone (Birks & Birks, 2000) and has conditions, and that these conditions are re?ected been widely used to con?rm the local presence of tree by the same species assemblages today (Rymer, species in studies of past tree-lines (Barnekow, 2000; 1978; Birks & Birks, 1980). Different proxies used to Bjune, 2005; Eide et al. , 2006). Chironomids (n- reconstruct past environmental conditions have in- biting midges) were used to infer past mean July air vidual strengths and weaknesses.…

Condizione: New. pp. 132, Map (Col.).

Hardcover. Condizione: Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

Paperback. Condizione: Brand New. 2010 edition. 132 pages. 10.24x7.60x0.30 inches. In Stock.

Paperback. Condizione: Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book.

First Edition. DW. x, 441pp. Illustrated. Board extremities bumped. Contents clean. Wrapper slightly chipped and worn at extremities, tail of spine creased o/w VG+/VG+.

Condizione: new. Questo è un articolo print on demand.

Condizione: new. Questo è un articolo print on demand.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book summarizes research from the intensive study of a pristine subalpine lake ecosystem and its catchment over the last 50 years. A wide range of topics is presented, including several unique time series focusing on changes in ice cover, water temperature, zooplankton, benthos and fish. Significant changes in the lake fauna after the introduction of European minnow into an ecosystem where brown trout was the sole fish species have been documented. The area received substantial radioactive fallout from the Chernobyl accident in 1986, and two articles address long-term changes in radiocaesium activity concentrations in allochthonous plant material and in fish. Other topics include palaeoecology, mercury in fish and remote sensing of catchment snows. Such long-term research is crucial in a rapidly changing environment due to the impacts of climate change, long-range pollutants and alien species. This provides a solid basis for future monitoring and management of freshwater ecosystems.The book will not only be of interest to freshwater ecologists working in the field, but also for managers responsible for the protection and monitoring of natural areas. It illustrates the changes now taking place in pristine ecosystems as a result of human activities and will serve as a supplementary text for courses in environmental management. 132 pp. Englisch.…

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book summarizes research from the intensive study of a pristine subalpine lake ecosystem and its catchment over the last 50 years. A wide range of topics is presented, including several unique time series focusing on changes in ice cover, water temperature, zooplankton, benthos and fish. Significant changes in the lake fauna after the introduction of European minnow into an ecosystem where brown trout was the sole fish species have been documented. The area received substantial radioactive fallout from the Chernobyl accident in 1986, and two articles address long-term changes in radiocaesium activity concentrations in allochthonous plant material and in fish. Other topics include palaeoecology, mercury in fish and remote sensing of catchment snows. Such long-term research is crucial in a rapidly changing environment due to the impacts of climate change, long-range pollutants and alien species. This provides a solid basis for future monitoring and management of freshwater ecosystems.The book will not only be of interest to freshwater ecologists working in the field, but also for managers responsible for the protection and monitoring of natural areas. It illustrates the changes now taking place in pristine ecosystems as a result of human activities and will serve as a supplementary text for courses in environmental management. 132 pp. Englisch.…

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -environmental variables are estimated and then applied to fossil assemblages under the assumption Plant and animal remains are often found well that the biota is in equilibrium with concurring preserved and in large quantities as fossils in lake environmental conditions. We have used fossil pollen sedimentary deposits. The composition of the fossil assemblages to reconstruct changes in past mean July assemblages, the biological proxies, can be used to air temperatures and changes in mean annual prec- infer environmental conditions at the time of de- itation (Birks & Birks, 2003). Plant macrofossils were sition. This is based on the uniformitarian assumption used to con rm and to give more robust interpre- that particular species assemblages of the past have tions about past vegetation and climate than the been shaped by speci c sets of environmental pollen evidence alone (Birks & Birks, 2000) and has conditions, and that these conditions are re ected been widely used to con rm the local presence of tree by the same species assemblages today (Rymer, species in studies of past tree-lines (Barnekow, 2000; 1978; Birks & Birks, 1980). Different proxies used to Bjune, 2005; Eide et al. , 2006). Chironomids (n- reconstruct past environmental conditions have in- biting midges) were used to infer past mean July air vidual strengths and weaknesses.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 132 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Preface.- The Norwegian reference lake ecosystem, Øvre Heimdalsvatn.- Holocene climate and environmental history of Brurskardstjørni, a lake in the catchment of Øvre Heimdalsvatn, south-central Norway.- The development of new algorithms for remote sensing of snow conditions based on data from the catchment of Øvre Heimdalsvatn and the vicinity.- Long-term trends in water temperature and ice cover in the subalpine lake, Øvre Heimdalsvatn, and nearby lakes and rivers.- Between-year variations in the development of crustacean zooplankton in the Norwegian subalpine lake, Øvre Heimdalsvatn.- Long-term changes in the littoral benthos of a Norwegian subalpine lake following the introduction of the European minnow (Phoxinus phoxinus).- The brown trout (Salmo trutta) in the lake, Øvre Heimdalsvatn: long-term changes in population dynamics due to exploitation and the invasive species, European minnow (Phoxinus phoxinus).- Diet overlap between introduced European minnow (Phoxinus phoxinus) and young brown trout (Salmo trutta) in the lake, Øvre Heimdalsvatn: a result of abundant resources or forced niche overlap .- A long-term study of catchment inputs of 137Cs to a subalpine lake in the form of allochthonous terrestrial plant material.- Long-term trends and variation in 137Cs activity concentrations in brown trout (Salmo trutta) from Øvre Heimdalsvatn, a Norwegian subalpine lake.- The importance of size and growth rate in determining mercury concentrations in European minnow (Phoxinus phoxinus) and brown trout (Salmo trutta) in the subalpine lake, Øvre Heimdalsvatn.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 132 pp. Englisch. …

Condizione: New. Print on Demand pp. 132 Illus., Map (Col.).

Condizione: New. PRINT ON DEMAND pp. 132.

Condizione: New. PRINT ON DEMAND pp. 132.