INVESTIGADORES
DIAZ VILLANUEVA veronica
artículos
Título:
A global analysis of terrestrial plant litter dynamics in non-perennial waterways
Autor/es:
DATRY, T.; FOULQUIER, A.; CORTI, R.; VON SCHILLER, D.; TOCKNER, K.; MENDOZA-LERA, C.; CLÉMENT, J. C.; GESSNER, M. O.; MOLEÓN, M.; STUBBINGTON, R.; GÜCKER, B.; ALBARIÑO, R.; ALLEN, D. C.; ALTERMATT, F.; ARCE, M. I.; ARNON, S.; BANAS, D.; BANEGAS-MEDINA, A.; BELLER, E.; BLANCHETTE, M. L.; BLANCO-LIBREROS, J. F.; BLESSING, J. J.; BOËCHAT, I. G.; BOERSMA, K. S.; BOGAN, M. T.; BONADA, N.; BOND, N. R.; BRINTRUP BARRÍA, K. C.; BRUDER, A.; BURROWS, R. M.; CANCELLARIO, T.; CANHOTO, C.; CARLSON, S. M.; CAUVY-FRAUNIÉ, S.; CID, N.; DANGER, M.; DE FREITAS TERRA, BIANCA; DE GIROLAMO, A. M; DE LA BARRA, EVANS; DEL CAMPO, R.; DIAZ-VILLANUEVA, V. D.; DYER, F.; ELOSEGI, A.; FAYE, E.; FEBRIA, C.; FOUR, B.; GAFNY, S.; GHATE, S. D.; GÓMEZ, R.; GÓMEZ-GENER, L.; GRAÇA, M. A. S.; GUARESCHI, S.; HOPPELER, F.; HWAN, J. L.; JONES, J. I.; KUBHEKA, S.; LAINI, A.; LANGHANS, S. D.; LEIGH, C.; LITTLE, C. J.; LORENZ, S.; MARSHALL, J. C.; MARTÍN, E.; MCINTOSH, A. R.; MEYER, E. I.; MILI?A, M.; MLAMBO, M. C.; MORAIS, M.; MOYA, N.; NEGUS, P. M.;
Revista:
NATURE GEOSCIENCE
Editorial:
NATURE PUBLISHING GROUP
Referencias:
Lugar: Londres; Año: 2018
ISSN:
1752-0894
Resumen:
Perennial rivers and streams make a disproportionate contribution to global carbon (C) cycling. However, the contribution ofintermittent rivers and ephemeral streams (IRES), which sometimes cease to flow and can dry completely, is largely ignoredalthough they represent over half the global river network. Substantial amounts of terrestrial plant litter (TPL) accumulate indry riverbeds and, upon rewetting, this material can undergo rapid microbial processing. We present the results of a globalresearch collaboration that collected and analysed TPL from 212 dry riverbeds across major environmental gradients and climatezones. We assessed litter decomposability by quantifying the litter carbon-to-nitrogen ratio and oxygen (O2) consumptionin standardized assays and estimated the potential short-term CO2 emissions during rewetting events. Aridity, cover of riparianvegetation, channel width and dry-phase duration explained most variability in the quantity and decomposability of plant litterin IRES. Our estimates indicate that a single pulse of CO2 emission upon litter rewetting contributes up to 10% of the daily CO2emission from perennial rivers and stream, particularly in temperate climates. This indicates that the contributions of IRESshould be included in global C-cycling assessments.