Obiettivo This proposal wishes to fundamentally improve our understanding of the role of tropical freshwater ecosystems in carbon (C) cycling on the catchment scale. It uses an unprecedented combination of state-of-the-art proxies such as stable isotope, 14C and biomarker signatures to characterize organic matter, radiogenic isotope signatures to determine particle residence times, as well as field measurements of relevant biogeochemical processes. We focus on tropical systems since there is a striking lack of data on such systems, even though riverine C transport is thought to be disproportionately high in tropical areas. Furthermore, the presence of landscape-scale contrasts in vegetation (in particular, C3 vs. C4 plants) are an important asset in the use of stable isotopes as natural tracers of C cycling processes on this scale. Freshwater ecosystems are an important component in the global C cycle, and the primary link between terrestrial and marine ecosystems. Recent estimates indicate that ~2 Pg C y-1 (Pg=Petagram) enter freshwater systems, i.e. about twice the estimated global terrestrial C sink. More than half of this is thought to be remineralized before it reaches the coastal zone, and for the Amazon basin this has even been suggested to be ~90% of the lateral C inputs. The question how general these patterns are is a matter of debate, and assessing the mechanisms determining the degree of processing versus transport of organic carbon in lakes and river systems is critical to further constrain their role in the global C cycle. This proposal provides an interdisciplinary approach to describe and quantify catchment-scale C transport and cycling in tropical river basins. Besides conceptual and methodological advances, and a significant expansion of our dataset on C processes in such systems, new data gathered in this project are likely to provide exciting and novel hypotheses on the functioning of freshwater systems and their linkage to the terrestrial C budget. Campo scientifico natural sciencesbiological sciencesecologyecosystemsfreshwater ecosystemsnatural sciencesearth and related environmental scienceshydrologydrainage basins Parole chiave Carbon biogeochemistry ecosystems proxies Programma(i) FP7-IDEAS-ERC - Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Argomento(i) ERC-SG-PE10 - ERC Starting Grant - Earth system science Invito a presentare proposte ERC-2009-StG Vedi altri progetti per questo bando Meccanismo di finanziamento ERC-SG - ERC Starting Grant Istituzione ospitante KATHOLIEKE UNIVERSITEIT LEUVEN Contributo UE € 1 015 422,00 Indirizzo OUDE MARKT 13 3000 Leuven Belgio Mostra sulla mappa Regione Vlaams Gewest Prov. Vlaams-Brabant Arr. Leuven Tipo di attività Higher or Secondary Education Establishments Ricercatore principale Steven Bouillon (Prof.) Contatto amministrativo Stijn Delauré (Dr.) Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Costo totale Nessun dato Beneficiari (2) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto KATHOLIEKE UNIVERSITEIT LEUVEN Belgio Contributo UE € 1 015 422,00 Indirizzo OUDE MARKT 13 3000 Leuven Mostra sulla mappa Regione Vlaams Gewest Prov. Vlaams-Brabant Arr. Leuven Tipo di attività Higher or Secondary Education Establishments Ricercatore principale Steven Bouillon (Prof.) Contatto amministrativo Stijn Delauré (Dr.) Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Costo totale Nessun dato UNIVERSITE DE LIEGE Belgio Contributo UE € 729 840,00 Indirizzo PLACE DU 20 AOUT 7 4000 Liege Mostra sulla mappa Regione Région wallonne Prov. Liège Arr. Liège Tipo di attività Higher or Secondary Education Establishments Contatto amministrativo Isabelle Halleux (Ms.) Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Costo totale Nessun dato