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- W2324156684 abstract "AB Aquatic Biology Contact the journal Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AB 21:191-204 (2014) - DOI: https://doi.org/10.3354/ab00588 Impact of atypical ammonium concentrations on phytoplankton abundance and composition in fresh versus estuarine waters Mary Lou Esparza1,*, Ann E. Farrell1, Douglas J. Craig1, Curt Swanson1, Bhupinder S. Dhaliwal1, Gry Mine Berg2 1Central Contra Costa Sanitation District, 5019 Imhoff Place, Contra Costa, CA 94553, USA 2Applied Marine Sciences, 911 Center St, Santa Cruz, CA 95060, USA *Corresponding author: mesparza@centralsan.org ABSTRACT: The impact of atypically high ammonium (NH4+) concentrations delivered via treated wastewater effluent on phytoplankton community composition was investigated in a tidal slough connected with Suisun Bay in the northern part of San Francisco Bay. Input of effluent to a downstream location resulted in NH4+ concentrations of (mean ± SD) 1021 ± 380 µmol l-1, compared with 2.9 ± 1 µmol l-1 at a site further upstream, and 4.8 ± 1 µmol l-1 in Suisun Bay. Comparison of the diatom community at the downstream site in Pacheco Slough with that in Suisun Bay revealed a substantial overlap in species, including Cyclotella scaldensis, which dominated diatom species composition in both locations. The ratio of diatoms:other phytoplankton biomass (µmol3:µmol3) suggested that diatoms contributed a greater proportion of total phytoplankton community biomass at the downstream location (48.6 ± 87) versus in Suisun Bay (9.5 ± 1) or upstream (9.5 ± 8), and that diatoms can readily grow in the presence of NH4+ concentrations varying from 2 to 1350 µmol l-1. In the present investigation, species composition of the seeding population was found to be a more important predictor of final phytoplankton community composition than nutrient concentrations or ratios. KEY WORDS: Phytoplankton · Ammonium · N:P ratio · NH4+:NO3- ratio · Diatoms · Chlorophytes · San Francisco Estuary · Suisun Bay Full text in pdf format PreviousNextCite this article as: Esparza ML, Farrell AE, Craig DJ, Swanson C, Dhaliwal BS, Berg GM (2014) Impact of atypical ammonium concentrations on phytoplankton abundance and composition in fresh versus estuarine waters. Aquat Biol 21:191-204. https://doi.org/10.3354/ab00588 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AB Vol. 21, No. 3. Online publication date: September 03, 2014 Print ISSN: 1864-7782; Online ISSN: 1864-7790 Copyright © 2014 Inter-Research." @default.
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- W2324156684 title "Impact of atypical ammonium concentrations on phytoplankton abundance and composition in fresh versus estuarine waters" @default.
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