| Title | Response fo 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 im pact 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. |
| Source | Advances in limnology (1995) 62, pp. 419–440 |
| Keywords | mountain lakesdiatomscladoceramacroinvertebratesplankton |
| Journal | Advances in limnology (1995) |
| Editor | Schweizerbart, Stuttgart, Germania |
| Year | 2009 |
| Type | Articolo in rivista |
| DOI | 10.1127/advlim/62/2009/419 |
| Authors | Marchetto A. (1); Rogora M. (1); Boggero A. (1); Musazzi S. (1); Lami A. (1); Lotter A.F.(2); Tolotti M.(3;4); Thies H. (3); Psenner R.(3); Massaferro J.(5); & Barbieri A.(6) |
| Text | 71917 2009 10.1127/advlim/62/2009/419 mountain lakes diatoms cladocera macroinvertebrates plankton Response fo Alpine lakes to major environmental gradients, as detected through planktonic, benthic and sedimentary assemblages Marchetto A. 1 ; Rogora M. 1 ; Boggero A. 1 ; Musazzi S. 1 ; Lami A. 1 ; Lotter A.F. 2 ; Tolotti M. 3;4 ; Thies H. 3 ; Psenner R. 3 ; Massaferro J. 5 ; Barbieri A. 6 1 CNR Istuto per lo Studio degli Ecosistemi, Verbania 2 University of Utrecht, Laboratory of Paleobotany ald Palynology 3 University of Innsbruck, Institute fur Zoologie und Limnologie 4 Istituto Agrario Sperimentale di San Michele all Adige 5 CRUB University of Comahue 6 Cantonal Agency for Water Protection and Treatment Canton Ticino A survey of 72 oligotrophic, clearwater high mountain lakes with minimum direct human im pact 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. 62 Published version Response fo Alpine lakes to major environmental gradients, as detected through planktonic, benthic and sedimentary assemblages Marchetto_etalii_2009_Advanc_Limnology_62_419_440 0.pdf 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 simona.musazzi MUSAZZI SIMONA aldo.marchetto MARCHETTO ALDO michela.rogora ROGORA MICHELA andrea.lami LAMI ANDREA TA.P02.014.002 Impatto dei cambiamenti globali sugli ecosistemi acquatici |
