Global warming exerts particularly pronounced effects on the European Alps. As the thawing rates of mountain permafrost ice is lower than for glacier ice, a shift from glacial/periglacial to paraglacial/periglacial dynamics is predicted for Alpine landscapes during the 21st century in relation to deglaciation. Poor knowledge exists on chemical and biological features of waters emerging from Alpine rock glaciers. A set of glacial- or permafrost-fed headwaters was investigated in the Eastern Italian Alps, aiming at exploring bacterial community composition and diversity in epilithic biofilm and sediments. Bacterial assemblages show significant differences according to water and sample type, and to catchment geology. Rock glacier-fed waters show enhanced conductivity and trace element concentrations, and their highly diverse bacterial assemblages significantly differ only from those of glacial streams. Further research will better outline the role of environmental features in modulating bacterial diversity of Alpine headwaters affected by progressing deglaciation.

Tolotti, M.; Albanese, D.; Cerasino, L.; Donati, C.; Pindo, M.; Rogora, M.; Seppi, R. (2018-06). First insights in bacteria diversity in headwaters emerging from Alpine rock glaciers. In: 5th European Conference on Permafrost (EUCOP 2018), Chamonix, France, June 23-July 1st, 2018. handle: http://hdl.handle.net/10449/46158

First insights in bacteria diversity in headwaters emerging from Alpine rock glaciers

Tolotti, M.
;
Albanese, D.;Cerasino, L.;Donati, C.;Pindo M.;
2018-06-01

Abstract

Global warming exerts particularly pronounced effects on the European Alps. As the thawing rates of mountain permafrost ice is lower than for glacier ice, a shift from glacial/periglacial to paraglacial/periglacial dynamics is predicted for Alpine landscapes during the 21st century in relation to deglaciation. Poor knowledge exists on chemical and biological features of waters emerging from Alpine rock glaciers. A set of glacial- or permafrost-fed headwaters was investigated in the Eastern Italian Alps, aiming at exploring bacterial community composition and diversity in epilithic biofilm and sediments. Bacterial assemblages show significant differences according to water and sample type, and to catchment geology. Rock glacier-fed waters show enhanced conductivity and trace element concentrations, and their highly diverse bacterial assemblages significantly differ only from those of glacial streams. Further research will better outline the role of environmental features in modulating bacterial diversity of Alpine headwaters affected by progressing deglaciation.
Alpine permafrost
Glaciers
Water chemistry
Bacterial finger-printing
Biofilm
Surface sediment
giu-2018
Tolotti, M.; Albanese, D.; Cerasino, L.; Donati, C.; Pindo, M.; Rogora, M.; Seppi, R. (2018-06). First insights in bacteria diversity in headwaters emerging from Alpine rock glaciers. In: 5th European Conference on Permafrost (EUCOP 2018), Chamonix, France, June 23-July 1st, 2018. handle: http://hdl.handle.net/10449/46158
File in questo prodotto:
File Dimensione Formato  
EUCOP-2018-abstract Tolotti etal.pdf

accesso aperto

Descrizione: Pdf of the abstract in its final print format
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 254.41 kB
Formato Adobe PDF
254.41 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/46158
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact