| Title | Response of Alpine lakes to major environmental gradients, as detected through planktonic, benthic and sedimentary assemblages |
| Abstract | A survey of 72 oligotrophic, clearwater high mountain lakes with minimum direct human impact in the Alps (Italy, Austria and Switzerland) was carried out in 2000 to identify biological indicators useful for lake classification. Samples were collected for water chemistry, phytoplankton, epilithic diatoms, littoral macroinvertebrates and zooplankton. Surface sediments were analyzed for algal pigments, metals, cladocera, chironomid and diatom remains. A multivariate analysis of morphometric, geographical and chemical variables identified two main gradients: (1) a geological gradient, from alkaline lakes in calcareous catchments to acidic lakes on granitic catchments, and (2) a morphological gradient including variables related to lake and catchment size and depth. The analysis of the biological data showed that the geological gradient is related to the composition of phytobenthos, as well as sedimentary diatoms and chironomids, while the morphological gradient is mainly related to the composition of algal pigments, phytoplankton and macrozoobenthos. The results were used to provide a lake typology for this ecoregion, and finally to identify indicator taxa. © 2009 E. Schweizerbart'sche Verlagsbuchhandlung, D-70176 Stuttgart. |
| Source | Advances in limnology (1995) 62, pp. 419–440 |
| Keywords | ChironomidsCladoceraDiatomsMacroinvertebratesMountain lakesPlankton |
| Journal | Advances in limnology (1995) |
| Editor | Schweizerbart, Stuttgart, Germania |
| Year | 2009 |
| Type | Articolo in rivista |
| DOI | 10.1127/advlim/62/2009/419 |
| Authors | Marchetto, Aldo; Rogora, Michela; Boggero, Angela; Musazzi, Simona; Lami, Andrea; Lotter, André F.; Tolotti, Monica; Thies, Hansjoerg; Psenner, Roland; Massaferro, Julieta; Barbieri, Alberto |
| Text | 407992 2009 10.1127/advlim/62/2009/419 Scopus 2 s2.0 80255137676 Chironomids Cladocera Diatoms Macroinvertebrates Mountain lakes Plankton Response of Alpine lakes to major environmental gradients, as detected through planktonic, benthic and sedimentary assemblages Marchetto, Aldo; Rogora, Michela; Boggero, Angela; Musazzi, Simona; Lami, Andrea; Lotter, Andre F.; Tolotti, Monica; Thies, Hansjoerg; Psenner, Roland; Massaferro, Julieta; Barbieri, Alberto Istituto Agrario San Michele all Adige; Consiglio Nazionale delle Ricerche; Centro Regional Universitario Bariloche; University of Innsbruck; Utrecht University; Cantonal Agency for Water Protection and Treatment A survey of 72 oligotrophic, clearwater high mountain lakes with minimum direct human impact in the Alps Italy, Austria and Switzerland was carried out in 2000 to identify biological indicators useful for lake classification. Samples were collected for water chemistry, phytoplankton, epilithic diatoms, littoral macroinvertebrates and zooplankton. Surface sediments were analyzed for algal pigments, metals, cladocera, chironomid and diatom remains. A multivariate analysis of morphometric, geographical and chemical variables identified two main gradients 1 a geological gradient, from alkaline lakes in calcareous catchments to acidic lakes on granitic catchments, and 2 a morphological gradient including variables related to lake and catchment size and depth. The analysis of the biological data showed that the geological gradient is related to the composition of phytobenthos, as well as sedimentary diatoms and chironomids, while the morphological gradient is mainly related to the composition of algal pigments, phytoplankton and macrozoobenthos. The results were used to provide a lake typology for this ecoregion, and finally to identify indicator taxa. © 2009 E. Schweizerbart sche Verlagsbuchhandlung, D 70176 Stuttgart. 62 Published version http //www.scopus.com/record/display.url eid=2 s2.0 80255137676 origin=inward Articolo in rivista Schweizerbart 1612 166X Advances in limnology 1995 Advances in limnology 1995 Adv. limnol. 1995 Advances in limnology. 1995 Ergebnisse der Limnologie 1995 1995 Archiv fur Hydrobiologie. Special issues Ergebnisse der Limnologie 1995 angela.boggero BOGGERO ANGELA aldo.marchetto MARCHETTO ALDO michela.rogora ROGORA MICHELA andrea.lami LAMI ANDREA |
