La Tour du Valat

Article

Isotopic Approach to Determining the Fate of Ammonium Regenerated from Sediments in a Eutrophic Sub-estuary of Waquoit Bay, MA

Joanna K. York, Auteur ; Gabrielle Tomasky, Auteur ; Ivan Valiela, Auteur ; Anne E. Giblin, Auteur

Dans Estuaries and Coasts (33(5) SEP 2010)

We measured fluxes of NH4+ and NO3- and delta N-15 of NH4+, sediment, and porewater NH4+ from incubated sediment cores along a nitrate gradient and in different seasons from Childs River, MA. NH4+ flux was low at the downstream site with the low[...]

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Article

Microzooplankton Grazing in Green Water-Results from Two Contrasting Estuaries

Joanna K. York, Auteur ; Barbara A. Costas, Auteur ; George B. McManus, Auteur

Dans Estuaries and Coasts (34(2) MAR 2011)

We measured seasonal variations in microzooplankton grazing in Long Island Sound (LIS) and San Francisco Bay (SFB). There was consistent evidence of nutrient limitation in LIS, but not SFB. We found higher chlorophyll a concentrations in LIS com[...]

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Article

Trophic Links in the Plankton in the Low Salinity Zone of a Large Temperate Estuary: Top-down Effects of Introduced Copepods

Joanna K. York, Auteur ; George B. McManus, Auteur ; Wim J. Kimmerer, Auteur ; Anne M. Slaughter, Auteur ; Toni R. Ignoffo, Auteur

Dans Estuaries and Coasts (37(3) MAY 2014)

We investigated trophic relationships involving microzooplankton in the low salinity zone of the San Francisco Estuary (SFE) as part of a larger effort aimed at understanding the dynamics of the food web supporting the endangered delta smelt, Hy[...]

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