| Title | Variability of microbial respiratory activity in relation to particulate organic matter over short time scales in a glacial Arctic fjord (Kongsfjorden, Svalbard) |
| Abstract | Sinking biogenic particles drive respiration in the ocean interior, help to maintain the ocean's strong vertical gradient of inorganic carbon and related studies are important to determine the flow of organic matter along the water column. Sediment trap studies have shown that a low percentage of the surface primary production reaches the bottom. However, organic matter collected by sediment traps does not take into account the entire pool of oxidable organic matter, which includes the dissolved organic matter present in the seawater. The study of microbial respiration rates instead fills this gap, since respiration includes oxidation of both dissolved and particulate organic mater, providing an integrated estimate of the carbon utilization in the sea. In this context, a study on an Arctic fjord (Kongsfyorden, Svalbard) was done in late summer 2013, with the purpose of knowing the variability of microbial remineralization rates in relation to particulate organic matter over short time scales in a coastal station (water depth ~105 m), where a mooring (Mooring Dirigibile Italia, MDI: 78° 54 .859'N; 12° 15. 411' E) is positioned.
A high variability of carbon dioxide production rates was recorded during the sampling days and this result was related to several factors. Useful information may be deducted for modelling studies of carbon flux in similar areas. |
| Source | PICES Effects of climate changes on the world's oceans, Santos, 23-27 marzo 2015 |
| Year | 2015 |
| Type | Abstract in atti di convegno |
| Authors | Maurizio Azzaro, Rosabruna La Ferla, Giovanna Maimone, Franco Decembrini, Filippo Azzaro, Carmela Caroppo, Stefano Miserocchi, Federico Giglio, Leonardo Langone, Stefano Aliani, Anderson S. Cabral, Rodolfo Paranhos |
| Text | 320016 2015 Variability of microbial respiratory activity in relation to particulate organic matter over short time scales in a glacial Arctic fjord Kongsfjorden, Svalbard Maurizio Azzaro, Rosabruna La Ferla, Giovanna Maimone, Franco Decembrini, Filippo Azzaro, Carmela Caroppo, Stefano Miserocchi, Federico Giglio, Leonardo Langone, Stefano Aliani, Anderson S. Cabral, Rodolfo Paranhos Institute for Coastal Marine Environment, Messina, Italy. Institute for Coastal Marine Environment, Taranto, Italy. Institute of Marine Sciences, Bologna, Italy. Institute of Marine Sciences, La Spezia, Italy. Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil PICES Effects of climate changes on the world s oceans Santos 23 27 marzo 2015 Internazionale Contributo Sinking biogenic particles drive respiration in the ocean interior, help to maintain the ocean s strong vertical gradient of inorganic carbon and related studies are important to determine the flow of organic matter along the water column. Sediment trap studies have shown that a low percentage of the surface primary production reaches the bottom. However, organic matter collected by sediment traps does not take into account the entire pool of oxidable organic matter, which includes the dissolved organic matter present in the seawater. The study of microbial respiration rates instead fills this gap, since respiration includes oxidation of both dissolved and particulate organic mater, providing an integrated estimate of the carbon utilization in the sea. In this context, a study on an Arctic fjord Kongsfyorden, Svalbard was done in late summer 2013, with the purpose of knowing the variability of microbial remineralization rates in relation to particulate organic matter over short time scales in a coastal station water depth 105 m , where a mooring Mooring Dirigibile Italia, MDI 78° 54 .859 N; 12° 15. 411 E is positioned. A high variability of carbon dioxide production rates was recorded during the sampling days and this result was related to several factors. Useful information may be deducted for modelling studies of carbon flux in similar areas. Abstract in atti di convegno federico.giglio GIGLIO FEDERICO stefano.miserocchi MISEROCCHI STEFANO franco.decembrini DECEMBRINI FRANCO filippo.azzaro AZZARO FILIPPO carmela.caroppo CAROPPO CARMELA stefano.aliani ALIANI STEFANO maurizio.azzaro AZZARO MAURIZIO rosabruna.laferla LA FERLA ROSABRUNA leonardo.langone LANGONE LEONARDO TA.P04.001.002 Processi Microbici coinvolti nel ciclo del carbonio in zone costiere e pelagiche del Mediterraneo e di aree polari |
