| Abstract | Phytoplankton (PCC) and prokaryoplankton community compositions were studied in five perialpine lakes (Garda, Maggiore, Como, Iseo, and Lugano) of different trophic conditions and mixing regimes, using inverted microscopy and CARD-FISH technique. The aim of this research was to assess, for the first time in these lakes, the relationships among PCC, bacteria, and archaea, and the effects of environmental drivers. We observed a clear difference of PCC compositions in spring and summer. All the lakes showed Bacillariophyta dominating in spring, whereas in summer, there were remarkable differences of PCC. Prokaryoplankton composition showed more pronounced differences in the vertical profile than those between spring and summer. The oligomictic lakes showed a uniform vertical gradient of prokaryotes in spring, while in the meromictic lakes, their abundances were incremented with depth. In summer, the prokaryotic community changed, and niche differentiation occurred in almost all lakes. In conclusion, our study showed a general pattern, common to all the lakes, of a first appearance of the large-sized "opportunistic" bacteria in spring, followed by ultramicrobacteria, less vulnerable to predation in summer. Significant correlations between a few PCC and bacterial groups were found, thus elucidating that functional interactions can be the key to understand plankton successions. |
| Text | 399430 2018 10.1007/s10750 018 3586 z Scopus 2 s2.0 85044209134 ISI Web of Science WOS 000448578500004 CARD FISH Prokaryotic Oligomictic Meromictic Limnological parameters Prokaryoplankton and phytoplankton community compositions in five large deep perialpine lakes Hernandez Aviles J.S.; Callieri C.; Bertoni R.; Morabito G.; Leoni B.; Lepori F.; Buzzi F.; Salmaso N. Laboratory Limnoecology, Department of Biology, UNAM, FES Zaragoza, Av. Guelatao 66, Iztapalapa, Mexico City, 09230, , Mexico; CNR Institute of Ecosystem Study, MEG, Largo Tonolli 50, Verbania, 28922, , Italy; Department of Earth and Environmental Sciences, University of Milano Bicocca, Monza, , Italy; Institute of Earth Sciences, SUPSI, Canobbio, 6952, , Switzerland; Department of Lecco, ARPA Lombardia, Via I Maggio 21, Oggiono, 23848, , Italy; Research and Innovation Centre, Fondazione E. Mach, Via E. Mach 1, S. Michele All adige, Trento, 38010, , Italy Phytoplankton PCC and prokaryoplankton community compositions were studied in five perialpine lakes Garda, Maggiore, Como, Iseo, and Lugano of different trophic conditions and mixing regimes, using inverted microscopy and CARD FISH technique. The aim of this research was to assess, for the first time in these lakes, the relationships among PCC, bacteria, and archaea, and the effects of environmental drivers. We observed a clear difference of PCC compositions in spring and summer. All the lakes showed Bacillariophyta dominating in spring, whereas in summer, there were remarkable differences of PCC. Prokaryoplankton composition showed more pronounced differences in the vertical profile than those between spring and summer. The oligomictic lakes showed a uniform vertical gradient of prokaryotes in spring, while in the meromictic lakes, their abundances were incremented with depth. In summer, the prokaryotic community changed, and niche differentiation occurred in almost all lakes. In conclusion, our study showed a general pattern, common to all the lakes, of a first appearance of the large sized opportunistic bacteria in spring, followed by ultramicrobacteria, less vulnerable to predation in summer. Significant correlations between a few PCC and bacterial groups were found, thus elucidating that functional interactions can be the key to understand plankton successions. 824 Published version http //www.scopus.com/inward/record.url eid=2 s2.0 85044209134 partnerID=q2rCbXpz Articolo 2018_Hydrobiologia_824_71_92.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 roberto.bertoni BERTONI ROBERTO cristiana.callieri CALLIERI CRISTIANA |
