Project:	Trophic ecology of small hydromedusae: a new perspective on their function in coastal ecosystems
Principal Investigator:	Dian Gifford (University of Rhode Island)
Co-Principal Investigator:	John Costello (Providence College) Sean Colin (Roger Williams University)
BCO-DMO Data Manager:	Nancy Copley (Woods Hole Oceanographic Institution) Nancy Copley (Woods Hole Oceanographic Institution)
Validated:	yes
Data version:	Jan 24, 2012
Version date:	Nov 20, 2012

Dataset handle ID (e.g. DOI or other persistent identifier):

not yet assigned

Current state: Final no updates expected
Description: hydromedusae and zooplankton abundance in Naragansett Bay timeseries
Acquisition description:

Field Sampling: Field sampling in Narragansett Bay was done twice weekly in 2005 and once weekly in 2006 during the hydromedusan growth season. Hydrographic data was collected using a HydroLab Datasonde 4 profiling package outfitted with sensors for depth, conductivity,and temperature. The potential prey field of hydromedusae consists of mesozooplankton (>200 µm) and microplankton (autotrophs and heterotrophs <200 µm). Mesozooplankton samples include both the hydromedusae and their potential mesozooplankton prey. Mesozooplankton were collected by vertical hauls of a metered 64 µm-mesh 0.5m diameter ring net. Samples were preserved in 4% buffered formaldehyde. Samples for analysis of autotrophic and heterotrophic microplankton were collected using a Niskin bottle deployed at targeted depths, typically 3 depths perstation (surface, mid-depth and bottom of the well-mixed water column). Samples were preserved with 10% (vol/vol) acid Lugols solution, settled, and then processed by inverted microscopy (Gifford and Caron 2001).

Processing description:

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