Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloA rock-glacier - pond system (NW Italian Alps): Soil and sediment properties, geochemistry, and trace-metal bioavailability
Anno di pubblicazione2020
FormatoElettronico
Autore/iN.Colombo ab C.Ferronato cd L. Vittori Antisari d L.Marziali e F.Salerno e S. Fratianni b M. E. D'Amico a A. Ribolini f D. Godone g S. Sartini h L. Paro i U. Morra di Cella j M. Freppaz a
Affiliazioni autoria Department of Agricultural, Forest and Food Sciences, University of Turin, Grugliasco, Italy b Department of Earth Sciences, University of Turin, Turin, Italy c Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy d Department of Agricultural and Food Sciences, University of Bologna, Bologna, Italy e CNR-IRSA (National Research Council - Water Research Institute), Brugherio, Italy f Department of Earth Sciences, University of Pisa, Pisa, Italy g CNR-IRPI (National Research Council - Research Institute for Geo-Hydrological Protection), Turin, Italy h So.Ge.T, Lucca, Italy i Department of "Natural and Environmental Risks", Arpa Piemonte, Turin, Italy j Department of "Climate Change", Arpa Valle d'Aosta, Aosta, Italy
Autori CNR e affiliazioni
  • DANILO FRANCESCO STEFANO GODONE
  • FRANCO SALERNO
  • LAURA MARZIALI
Lingua/e
  • inglese
AbstractRock-glacier sediment transfer and ice melting can impact surface waters located downstream. However, there is a lack of knowledge on the influence of rock-glacier dynamics on the geochemical, hydrochemical, and ecological characteristics of adjacent impounded surface waters. In the Col d'Olen area (Long-Term Ecological Research site, NW Italian Alps), an intact rock glacier terminates into a pond and solute-enriched waters originating from the rock glacier flow into the pond through a subsurface hydrological window. In this study, we performed geophysical and ground surface temperature measurements. Moreover, we sampled soils and sediments in different compartments of the investigated rock-glacier - pond system and we further sampled benthic invertebrates in the pond. Cold ground thermal regime, ground-ice presence, and coarse debris cover on the rock glacier together with its lithology (serpentinites) influence the rock-glacier geochemistry and ecology with respect to surrounding areas. Pond geochemistry is affected by transfer of trace-metal-enriched fine-grained debris and meltwaters from the rock glacier. Enhanced bioavailability of serpentinite-associated trace metals was proved, with concentrations of Ni and Cr in benthic invertebrates up to 384 and 110 mg kg-1 d.w., respectively, potentially exerting toxic effects on pond biota. The advancing movement of the rock glacier not only has delivered sediments to the pond, but it has progressively filled the valley depression where the pond is located, creating a dam that could have modified the level of impounded water. This process likely constituted a sediment trap in which serpentinitic rock-glacier sediments could be deposited at the pond bottom, with related geochemical and ecological implications. This study illustrates the importance of rock glaciers in influencing the characteristics of downstream freshwater bodies and highlights the need to improve our knowledge about climate-change-related impacts of rock-glacier dynamics on alpine headwaters.
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RivistaCatena (Cremling.)
Attiva dal 1973
Editore: Elsevier Science - Cremlingen
Paese di pubblicazione: Paesi Bassi
Lingua: inglese
ISSN: 0341-8162
Titolo chiave: Catena (Cremling.)
Titolo proprio: Catena. (Cremling.)
Titolo abbreviato: Catena (Cremling.)
Titoli alternativi:
  • Catena (Amsterdam) (Cremling.)
  • Catena (Giessen) (Cremling.)
Numero volume della rivista194
Fascicolo della rivista-
DOI10.1016/j.catena.2020.104700
Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)-
Parole chiaveSoil, Weathering, Rock glacier, Lacustrine sediments, Alps, LTER
Link (URL, URI)https://doi.org/10.1016/j.catena.2020.104700
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Data di accettazione-
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Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
  • IRSA — Istituto di ricerca sulle acque
Moduli/Attività/Sottoprogetti CNR
  • TA.P05.010.001 : Tecniche e tecnologie per il monitoraggio dei parametri che caratterizzano le evoluzioni morfologiche di alvei e versanti instabili.
  • DTA.AD003.141.001 : Sviluppo sistemi monitoraggio innovativi
Progetti Europei-
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