Obiettivo The overall objective of this proposal is to understand how to achieve, in E. Africa, sustainable revegetation based on natural N2-inputs with optimum use of available water. It is the logical extension of our now-ending STD project in Kenya. This multidisciplinary research of tree-dominated plant communities is based on our own E. African research as well as on published work and personal communications of other experts. N and Water are the most commonly growth-limiting factors in arid areas. We propose to extend our investigations of the N and water relations of E. African forestry through a multi-disciplinary approach of: microbial, molecular, whole-plant studies (Frankia & rhizobial symbioses) and the newest tool for environmental studies,natural abundance levels of the stable isotopes of C, N, &H. The microbial and molecular studies will lead to a better understanding and management of this N-input to ecosystems. Both rhizobia and Frankia symbioses are important N2-fixers in the arid tropics. The stable isotopes work has two main roles: (1) self-standing study of N-cycling and water relations alongside advancement in the already valuable interpretations of stable isotope signatures in nature; and (2) a liaison and service role linking the microbial, whole plant, and ecosystems approaches, as well as evaluating the success, in nature, of microbial whole plant field trials by estimating the amounts of atmospheric N2-fixation and the water costs. The experimentation will include laboratory, glasshouse and field trials. New field plots in Scotland and Spain, analogous to Kenyan plots, add comparisons, cost-effective backups, and a newly emdhasized European dimension. Mathematical modelling will be added to the continuing isotope studies. This is an aggregate proposal, which has been provisionally costed. We invite comments on the several parts. Campo scientifico social scienceseconomics and businesseconomicsproduction economicsproductivitynatural sciencesbiological sciencesecologyecosystemsnatural sciencesbiological sciencesbiological behavioural sciencesethologybiological interactionsagricultural sciencesagriculture, forestry, and fisheriesforestrynatural sciencesmathematicsapplied mathematicsmathematical model Programma(i) FP3-STD 3 - Specific research and technological development programme (EEC) in the field of the life sciences and technologies for developing countries, 1990-1994 Argomento(i) Data not available Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore Scottish Crop Research Institute (SCRI) Contributo UE Nessun dato Indirizzo Invergowrie DD2 5DA Dundee Regno Unito Mostra sulla mappa Costo totale Nessun dato Partecipanti (3) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS Spagna Contributo UE Nessun dato Indirizzo 10,Avenida Reina Mercedes 10 41012 SEVILLA Mostra sulla mappa Costo totale Nessun dato KENYA FORESTRY RESEARCH INSTITUTE Kenya Contributo UE Nessun dato Indirizzo 2 NAIROBI Mostra sulla mappa Costo totale Nessun dato UNIVERSITY OF DUNDEE Regno Unito Contributo UE Nessun dato Indirizzo Nethergate DD1 4HN DUNDEE Mostra sulla mappa Costo totale Nessun dato