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Nitrogen limitation of phytoplankton in a Spanish karst lake with a deep chlorophyll maximum: a nutrient enrichment bioassay approach

Camacho, Antonio ; Wurtsbaugh, Wayne A. ; Miracle, Maria R. ; Armengol, Xavier ; Vicente, Eduardo

Journal of plankton research, 2003-04, Vol.25 (4), p.397-404 [Periódico revisado por pares]

Oxford: Oxford University Press

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Título:
Nitrogen limitation of phytoplankton in a Spanish karst lake with a deep chlorophyll maximum: a nutrient enrichment bioassay approach
Autor: Camacho, Antonio ; Wurtsbaugh, Wayne A. ; Miracle, Maria R. ; Armengol, Xavier ; Vicente, Eduardo
Assuntos: Algae ; Animal and plant ecology ; Animal, plant and microbial ecology ; Anthropogenic factors ; Bioassays ; Biological and medical sciences ; Chlorophyll ; Chlorophylls ; Epilimnion ; Fresh water ecosystems ; Fundamental and applied biological sciences. Psychology ; Ground water ; Groundwater ; Growth ; Hypolimnion ; Inland waters ; Karst ; Lakes ; Limiting factors ; Marine ; Metalimnion ; Nitrogen ; Nutrient cycles ; Nutrient deficiency ; Nutrient enrichment ; Phosphorus ; Phytoplankton ; Stratification ; Summer ; Synecology
É parte de: Journal of plankton research, 2003-04, Vol.25 (4), p.397-404
Notas: istex:36E5C8BF8C31229DF02D95482B9299683B9B41A0
local:0250397
Corresponding Author: antonio.camacho@uv.es
PII:1464-3774
ark:/67375/HXZ-W5N4GVP3-0
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: An in vitro nutrient addition bioassay was performed to test the relative inorganic nitrogen (N) and phosphorus (P) limitation of phytoplankton in a Spanish karst lake (El Tejo) during the last part of the stratification period, when nutrient limitation is most pronounced. Nutrient deficiency was tested in samples from three different layers of the lake: the epilimnion, metalimnion and oxic hypolimnion. Nitrogen additions, either without or combined with P, increased phytoplankton growth in all three strata, compared with controls or P treatments. This showed that N was the nutrient limiting phytoplankton growth in late summer–early fall. Since both hypolimnetic diffusion and groundwater fluxes of N-rich waters into the lake are much reduced during summer, N becomes the limiting nutrient as stratification advances. We suggest that in this Mediterranean area with low atmospheric deposition of anthropogenic N and in lakes relatively free of surface run-off, nutrient supply by atmospheric deposition might be a key factor in controlling nutrient deficiency for phytoplankton growth.
Editor: Oxford: Oxford University Press
Idioma: Inglês

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Nitrogen limitation of phytoplankton in a Spanish karst lake with a deep chlorophyll maximum: a nutrient enrichment bioassay approach

Camacho, Antonio ; Wurtsbaugh, Wayne A. ; Miracle, Maria R. ; Armengol, Xavier ; Vicente, Eduardo

Oxford: Oxford University Press

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