| Title | Sedimentary pigments in 308 alpine lakes and their relation to environmental gradients |
| Abstract | We undertook a comprehensive comparison between the pigment composition of surface
sediment samples and contemporary catchment and limnological data deriving from 308 mountain
lakes in 11 mountain regions (Lake Districts) covering a wide latitudinal and longitudinal gradient
across Europe. This paper examines whether photosynthetic algal and bacterial pigments stored in the
lake sediment can be used to identify different lake typologies and population dynamics of primary producers.
We focus on a multivariate numerical analysis relating the relative abundance of marker pigments
of algae, cyanobacteria and phototrophic sulphur bacteria to a set of physical and chemical factors
(both natural and anthropogenic) determining the environmental conditions in mountain lakes.
Redundancy Analysis (RDA), including partial RDA, of carotenoid assemblages constrained by environmental
variables suggests that the main differences between lake districts are caused by geographic
position (e.g. longitude), catchment characteristics (e.g. % carbonate rocks) and chemical variables
(e.g. Mg, NO3). Other variables such as temperature and phosphorus play a minor role, probably be -
cau se of the short length of the gradient covered by these cold and mostly oligotrophic lakes. Pigment
composition varies primarily in response to catchment geology and pollution (i.e. acidification from
long range transport) gradients. Purple sulphur photosynthetic bacteria (okenone) and cyanobacteria
(echinenone, canthaxanthin, scytonemin) are replaced by siliceous algae (fucoxanthin and diatoxanthin),
cryptophytes (alloxanthin) and dinoflagellates (diadinoxanthin). With respect to site classification,
the pigment ordination shows a clear distinction between the more pristine lakes (in the Pyrenees)
and the more polluted sites (in the Tatra Mountains and Central Southern Alps) or those with water
higher in solute content (the Julian Alps and Greenland). |
| Source | Journal of Great Lakes research, pp. 217–238 |
| Keywords | carotenoidscanonical analysisalpine lakesEMERGE |
| Journal | Journal of Great Lakes research |
| Editor | International Association for Great Lakes Research., s.l., Canada |
| Year | 2009 |
| Type | Articolo in rivista |
| DOI | 10.1127/advlim/62/2009/247 |
| Authors | Lami, A., S. Musazzi, A. Marchetto, T. Buchaca, M. Kernan, E. Jeppesen, & P. Guilizzoni |
| Text | 454296 2009 10.1127/advlim/62/2009/247 ISI Web of Science WOS WOS 000267040900018 Scopus 2 s2.0 83155194990 carotenoids canonical analysis alpine lakes EMERGE Sedimentary pigments in 308 alpine lakes and their relation to environmental gradients Lami, A., S. Musazzi, A. Marchetto, T. Buchaca, M. Kernan, E. Jeppesen, P. Guilizzoni CNR IRSA, We undertook a comprehensive comparison between the pigment composition of surface sediment samples and contemporary catchment and limnological data deriving from 308 mountain lakes in 11 mountain regions Lake Districts covering a wide latitudinal and longitudinal gradient across Europe. This paper examines whether photosynthetic algal and bacterial pigments stored in the lake sediment can be used to identify different lake typologies and population dynamics of primary producers. We focus on a multivariate numerical analysis relating the relative abundance of marker pigments of algae, cyanobacteria and phototrophic sulphur bacteria to a set of physical and chemical factors both natural and anthropogenic determining the environmental conditions in mountain lakes. Redundancy Analysis RDA , including partial RDA, of carotenoid assemblages constrained by environmental variables suggests that the main differences between lake districts are caused by geographic position e.g. longitude , catchment characteristics e.g. % carbonate rocks and chemical variables e.g. Mg, NO3 . Other variables such as temperature and phosphorus play a minor role, probably be cau se of the short length of the gradient covered by these cold and mostly oligotrophic lakes. Pigment composition varies primarily in response to catchment geology and pollution i.e. acidification from long range transport gradients. Purple sulphur photosynthetic bacteria okenone and cyanobacteria echinenone, canthaxanthin, scytonemin are replaced by siliceous algae fucoxanthin and diatoxanthin , cryptophytes alloxanthin and dinoflagellates diadinoxanthin . With respect to site classification, the pigment ordination shows a clear distinction between the more pristine lakes in the Pyrenees and the more polluted sites in the Tatra Mountains and Central Southern Alps or those with water higher in solute content the Julian Alps and Greenland . We undertook a comprehensive comparison between the pigment composition of surface sediment samples and contemporary catchment and limnological data deriving from 308 mountain lakes in 11 mountain regions Lake Districts covering a wide latitudinal and longitudinal gradient across Europe. This paper examines whether photosynthetic algal and bacterial pigments stored in the lake sediment can be used to identify different lake typologies and population dynamics of primary producers. We focus on a multivariate numerical analysis relating the relative abundance of marker pigments of algae, cyanobacteria and phototrophic sulphur bacteria to a set of physical and chemical factors both natural and anthropogenic determining the environmental conditions in mountain lakes. Redundancy Analysis RDA , including partial RDA, of carotenoid assemblages constrained by environmental variables suggests that the main differences between lake districts are caused by geographic position e.g. longitude , catchment characteristics e.g. % carbonate rocks and chemical variables e.g. Mg, NO3 . Other variables such as temperature and phosphorus play a minor role, probably be cau se of the short length of the gradient covered by these cold and mostly oligotrophic lakes. Pigment composition varies primarily in response to catchment geology and pollution i.e. acidification from long range transport gradients. Purple sulphur photosynthetic bacteria okenone and cyanobacteria echinenone, canthaxanthin, scytonemin are replaced by siliceous algae fucoxanthin and diatoxanthin , cryptophytes alloxanthin and dinoflagellates diadinoxanthin . With respect to site classification, the pigment ordination shows a clear distinction between the more pristine lakes in the Pyrenees and the more polluted sites in the Tatra Mountains and Central Southern Alps or those with water higher in solute content the Julian Alps and Greenland . Published version http //www.scopus.com/inward/record.url eid=2 s2.0 83155194990 partnerID=MN8TOARS Lami et al. 2009 Sedimentary pigments in 308 alpine lakes and their.pdf articolo pdf Lami et al. 2009 Sedimentary pigments in 308 alpine lakes and their.pdf Articolo in rivista International Association for Great Lakes Research. 0380 1330 Journal of Great Lakes research Journal of Great Lakes research J. Great Lakes res. simona.musazzi MUSAZZI SIMONA piero.guilizzoni GUILIZZONI PIERO aldo.marchetto MARCHETTO ALDO andrea.lami LAMI ANDREA |
