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Dust inputs and bacteria influence dissolved organic matter in clear alpine lakes.

AutorMladenov, N.; Sommaruga, Rubén; Morales-Baquero, M.; Laurion, I.; Camarero, Lluís ; Diéguez, M.; Camacho, Antonio; Delgado Huertas, Antonio ; Torres, O.; Chen, Z.; Felip, Marisol; Reche, Isabel
Fecha de publicación2011
EditorNature Publishing Group
CitaciónNature Communications 2: 405-411 (2011)
ResumenRemote lakes are usually unaffected by direct human infl uence, yet they receive inputs of atmospheric pollutants, dust, and other aerosols, both inorganic and organic. In remote, alpine lakes, these atmospheric inputs may infl uence the pool of dissolved organic matter, a critical constituent for the biogeochemical functioning of aquatic ecosystems. Here, to assess this infl uence, we evaluate factors related to aerosol deposition, climate, catchment properties, and microbial constituents in a global dataset of 86 alpine and polar lakes. We show signifi cant latitudinal trends in dissolved organic matter quantity and quality, and uncover new evidence that this geographic pattern is infl uenced by dust deposition, fl ux of incident ultraviolet radiation, and bacterial processing. Our results suggest that changes in land use and climate that result in increasing dust fl ux, ultraviolet radiation, and air temperature may act to shift the optical quality of dissolved organic matter in clear, alpine lakes.
Descripción6 páginas, 4 figuras.
Versión del editorhttp://dx.doi.org/10.1038/ncomms1411
URIhttp://hdl.handle.net/10261/46195
DOI10.1038/ncomms1411
ISSN2041-1723
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