| Title | Endogenous origin of foams in lakes: a long-term analysis for Lake Maggiore (northern Italy) |
| Abstract | The formation of foams on lakes is a complex phenomenon whose origin is often hardly identifiable. Recently (2007, 2008, and 2010) foam episodes started to occur in Lake Maggiore, northern Italy. The present work aimed to verify the hypothesis of an endogenous-natural origin of these foams, driven by trophic or climatic changes. To this purpose, a long-term (2000-2013) analysis of phytoplankton biovolumes, meteorological, and hydrological data has been performed together with the chemical characterization of foams. Foams resulted of endogenous origin and likely related to phytoplankton biomass degradation. Data analysis highlighted atypical warm temperature and residual lake stratification in winter in two of the three years of foam events, coupled with exceptional Bacyllariophyceae blooms in spring. Tabellaria flocculosa mostly contributed in terms of biomass in 2007 and 2008, but not in 2010; thus overall algal biomass seemed a better predictor of the risk of foam formation. Foam events occurred from July to December, driven by atypically windy conditions, and congruently with the time needed to degrade biomass into surface-active compounds. A co-occurrence of different factors resulted essential to generate foams, and climate changes likely contribute to enhance their occurrence in Lake Maggiore. |
| Source | Hydrobiologia (The Hague. Print) 767, pp. 249–265 |
| Keywords | Climate changeFoamLake MaggiorePhytoplankton |
| Journal | Hydrobiologia (The Hague. Print) |
| Editor | Kluwer Academic Publishers, Boston, Paesi Bassi |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1007/s10750-015-2506-8 |
| Authors | Stefani, F.; Salerno, F.; Copetti, D.; Rabuffetti, D.; Guidetti, L.; Torri, G.; Naggi, A.; Iacomini, M.; Morabito, G.; Guzzella, L. |
| Text | 339313 2016 10.1007/s10750 015 2506 8 Scopus 2 s2.0 84955645010 ISI Web of Science WOS WOS 000369001000020 Climate change Foam Lake Maggiore Phytoplankton Endogenous origin of foams in lakes a long term analysis for Lake Maggiore northern Italy Stefani, F.; Salerno, F.; Copetti, D.; Rabuffetti, D.; Guidetti, L.; Torri, G.; Naggi, A.; Iacomini, M.; Morabito, G.; Guzzella, L. Consiglio Nazionale delle Ricerche; ARPA Piemonte; Istituto di Ricerche Chimiche e Biochimiche G. Ronzoni; Universidade Federal do Parana; Consiglio Nazionale delle Ricerche The formation of foams on lakes is a complex phenomenon whose origin is often hardly identifiable. Recently 2007, 2008, and 2010 foam episodes started to occur in Lake Maggiore, northern Italy. The present work aimed to verify the hypothesis of an endogenous natural origin of these foams, driven by trophic or climatic changes. To this purpose, a long term 2000 2013 analysis of phytoplankton biovolumes, meteorological, and hydrological data has been performed together with the chemical characterization of foams. Foams resulted of endogenous origin and likely related to phytoplankton biomass degradation. Data analysis highlighted atypical warm temperature and residual lake stratification in winter in two of the three years of foam events, coupled with exceptional Bacyllariophyceae blooms in spring. Tabellaria flocculosa mostly contributed in terms of biomass in 2007 and 2008, but not in 2010; thus overall algal biomass seemed a better predictor of the risk of foam formation. Foam events occurred from July to December, driven by atypically windy conditions, and congruently with the time needed to degrade biomass into surface active compounds. A co occurrence of different factors resulted essential to generate foams, and climate changes likely contribute to enhance their occurrence in Lake Maggiore. 767 Published version https //link.springer.com/article/10.1007/s10750 015 2506 8 Endogenous origin of foams in lakes a long term analysisfor Lake Maggiore northern Italy Endogenous origin of foams in lakes a long term analysisfor Lake Maggiore northern Italy pdf 2016_Article_.pdf Articolo in rivista Kluwer Academic Publishers 0018 8158 Hydrobiologia The Hague. Print Hydrobiologia The Hague. Print Hydrobiologia The Hague. Print Hydrobiologia. The Hague. Print Hydrobiologia Dordrecht The Hague. Print Hydrobiologia Boston The Hague. Print Hydrobiologia London The Hague. Print giuseppe.morabito MORABITO GIUSEPPE liciamaria.guzzella GUZZELLA LICIA MARIA diego.copetti COPETTI DIEGO franco.salerno SALERNO FRANCO fabrizio.stefani STEFANI FABRIZIO |
