Objetivo The proposed research programme will increase understanding of ecosystem dynamics at the forest-tundra ecotone in northern Europe. In particular, it will quantify the dynamics of the response of this ecotone to changes in climate and in land use. In order to achieve this overall objective, the following more specific objectives will be addressed:- To establish the principal environmental determinant(s) of the position of the forest-tundra ecotone in northern Europe;- To evaluate the long-term stability of the position of this ecotone;- To test the extent to which stabilising feedback controls determine the sensitivity of the ecotone to environmental changes;- To investigate the extent to which potential dynamic responses of the ecotone to environmental changes are modulated by other limiting factors, including propagule dispersal, seedling establishment, disturbance régime and herbivore impacts;- To evaluate the impacts of a transformation from tundra to birch woodland upon carbon sequestration, trace-gas fluxes, soil organic matter mineralisation rates and catchment hydrology;- To construct a landscape-scale model of ecosystem dynamics able to simulate the response of the ecotone to a variety of scenarios of environmental change;-To simulate the impacts of alternative environmental change scenarios upon the ecotone.These objectives will be addressed through a combination of field measurements, experiments and modelling at 6 study sites in Fennoscandia. Palaeoecological data will be used to provide a longer time perspective where appropriate, whilst the programmes of measurement and field manipulations will establish bases for longer-term monitoring of the ecotone. The study sites will be arranged along two complementary transects within environmental space. Northern Europe exhibits a strong oceanic-continental climate gradient along which the first transect will extend. The topographic diversity of Fennoscandia leads to recurrence of the forest-tundra ecotone across a wide latitudinal range and thus under diverse conditions of insolation and photoperiod; the second transect will extend along this gradient. The contemporary climate, trace-gas fluxes and soil organic matter mineralisation rates will be monitored; tree seedling establishment and growth and propagule flow, will be measured; the role of outlying trees in ecotone response will be assessed; the past position of the ecotone and the palaeoclimate will be investigated; time-series of snow-cover data will be obtained from satellite data; experiments will investigate the influences of temperature, snow-cover, the presence of a canopy, herbivory and disturbance upon tree seedling establishment; and models will be developed of landscape-scale hydrology and ecosystem dynamics. Ámbito científico natural sciencesearth and related environmental scienceshydrologyengineering and technologymechanical engineeringvehicle engineeringaerospace engineeringsatellite technologynatural sciencesbiological sciencesecologyecosystems Programa(s) FP4-ENV 2C - Specific programme of research and technological development in the field of environment and climate, 1994-1998 Tema(s) 01020203 - Biodiversity and environmental change Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador University of Durham Aportación de la UE Sin datos Dirección South Road DH1 3LE Durham Reino Unido Ver en el mapa Coste total Sin datos Participantes (8) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo GEOLOGICAL SURVEY OF DENMARK AND GREENLAND Dinamarca Aportación de la UE Sin datos Dirección 8,Oester Voldgade 10 2400 KOEPENHAGEN Ver en el mapa Coste total Sin datos NORWEGIAN INSTITUTE FOR WATER RESEARCH Noruega Aportación de la UE Sin datos Dirección 19,Brekkeveien 19 0411 Oslo Ver en el mapa Enlaces Sitio web Opens in new window Coste total Sin datos NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY Noruega Aportación de la UE Sin datos Dirección Realfagbygget 7491 TRONDHEIM Ver en el mapa Coste total Sin datos POTSDAM INSTITUTE FOR CLIMATE IMPACT RESEARCH Alemania Aportación de la UE Sin datos Dirección Telegrafenberg C4 1441 POTSDAM Ver en el mapa Coste total Sin datos UNIVERSITY OF HELSINKI Finlandia Aportación de la UE Sin datos Dirección 20 A,Siltavuorenpenger 20 A 00014 HELSINKI Ver en el mapa Coste total Sin datos Umeå Universitet Suecia Aportación de la UE Sin datos Dirección Universitetsomradet, Hus L 901 87 Umeå Ver en el mapa Coste total Sin datos University of Göteborg Suecia Aportación de la UE Sin datos Dirección 22B,Carl Skottsbergs Gata 413 19 Göteborg Ver en el mapa Coste total Sin datos Uppsala University Suecia Aportación de la UE Sin datos Dirección 18B,Norbyvägen 752 36 Uppsala Ver en el mapa Coste total Sin datos