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• W2334506775 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 488:133-143 (2013) - DOI: https://doi.org/10.3354/meps10395 Interaction between ammonium and phosphate uptake rates in the seagrass Zostera noltii Beatriz Villazán*, Fernando G. Brun, Rocío Jiménez-Ramos, J. Lucas Pérez-Lloréns, Juan J. Vergara Departamento de Biología (Área de Ecología), Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus de Excelencia Internacional del Mar (CEIMAR), Puerto Real 11510, Cádiz, Spain *Email: beatriz.villazan@uca.es ABSTRACT: Foliar ammonium and phosphate uptake rates and their interactions were assessed in whole seagrass Zostera noltii plants incubated in 2-compartment transparent chambers. This method allowed the calculation of nutrient uptake rates by leaves and by roots and rhizomes independently, avoiding plant breakage. Overall, a direct linear relationship between foliar uptake rates and seawater nutrient concentrations (phosphate or ammonium) was found, with uptake rates much higher in the first 5 min (nutrient adsorption). This faster adsorption was followed by slower uptake rates (nutrient absorption) in the next time intervals. When both nutrients were supplied separately, foliar ammonium uptake rates were 3-fold higher than those of phosphate in the range of the nutrient concentrations assayed for the whole incubation interval (120 min). When both nutrients were added simultaneously (10 µM phosphate and 50 µM ammonium, final concentrations), ammonium uptake rates were similar to those values recorded when ammonium was provided alone, whereas phosphate uptake rates were about 55% lower than those measured when phosphate was added alone. This study reveals for the first time the inhibitory effect of ammonium on phosphate uptake in seagrasses. KEY WORDS: Ammonium toxicity · Phosphate uptake · Ammonium uptake · Zostera noltii · Eutrophication · Membrane potential · Seagrass Full text in pdf format PreviousNextCite this article as: Villazán B, Brun FG, Jiménez-Ramos R, Pérez-Lloréns JL, Vergara JJ (2013) Interaction between ammonium and phosphate uptake rates in the seagrass Zostera noltii. Mar Ecol Prog Ser 488:133-143. https://doi.org/10.3354/meps10395 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 488. Online publication date: August 15, 2013 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2013 Inter-Research." @default.
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• W2334506775 date "2013-08-15" @default.
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• W2334506775 title "Interaction between ammonium and phosphate uptake rates in the seagrass Zostera noltii" @default.
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• W2334506775 doi "https://doi.org/10.3354/meps10395" @default.
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