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Impact of a flood event on the biogeochemical behaviour of a mesotrophic alpine lake: Lake Bourget (Savoy)

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Book cover Oceans, Rivers and Lakes: Energy and Substance Transfers at Interfaces

Part of the book series: Developments in Hydrobiology ((DIHY,volume 131))

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Abstract

A flood event which occurred during the onset of thermal stratification and of algal growth (March 1996) was studied in mesotrophic Lake Bourget (France). Both physical and biogeoehemical processes occurring during this episode were assessed. The dominant effect was a decrease of nutrient concentrations along the river—lake ecotone. This phenomenon seemed mainly linked to biological factors: stimulation of the spring algal and bacterial growth. After the flood, the algae aggregated with allochthonous particles brought by the river and were rapidly eliminated by sedimentation. The effect of this early spring flood, seemed spatially restricted and rather neutral as regards lake water quality. In the lake region crossed by the river plume, the overall effect after the flood was a decrease of P available for the phytoplankton. In the open water, the P concentration was probably not modified by the load supplied by the flood.

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J.-C. Amiard B. Le Rouzic B. Berthet G. Bertru

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© 1998 Springer Science+Business Media Dordrecht

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Vinçon-Leite, B., Bournet, PE., Gayte, X., Fontvieille, D., Tassin, B. (1998). Impact of a flood event on the biogeochemical behaviour of a mesotrophic alpine lake: Lake Bourget (Savoy). In: Amiard, JC., Le Rouzic, B., Berthet, B., Bertru, G. (eds) Oceans, Rivers and Lakes: Energy and Substance Transfers at Interfaces. Developments in Hydrobiology, vol 131. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5266-2_28

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  • DOI: https://doi.org/10.1007/978-94-011-5266-2_28

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-6216-9

  • Online ISBN: 978-94-011-5266-2

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