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Abstract Detail


Phycological Section

Burr, Kari L [1], Brunell, Mark S [1].

Thalassiosira From the Tidal San Joaquin River Stockton, California USA.

Several species of the diatom genus Thalassiosira Cleve were collected in freshwater phytoplankton samples from a fifty two kilometer reach of the San Joaquin River between Vernalis and the Stockton Deep Water Ship Channel during 2005-2006. The entire reach is freshwater habitat with the lower twenty eight km influenced by mixed diurnal tides driven by the San Francisco Estuary. A total of ninety four samples were collected during the months of July, August, September and October. Conductivity ranged from 384-571 µS cm-1. The morphology of these species is being examined using scanning electron microscopy and light microscopy. Preliminary work indicates at least five species are present including T. weissflogii (Grunow) Fryxell & Hasle; T. visurgis (Hustedt); T. decipiens and T. bramaputrae (Ehrenberg) Hak. & Locker. The objective of this paper is to give a detailed account of the observed Thalassiosira species, with remarks on their morphology and ecology.


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1 - University of the Pacific, Biological Sciences, 3601 Pacific Avenue, Stockton, CA, 95211, USA

Keywords:
Thalassiosira
San Joaquin River
Estuary
Freshwater
Tidal.

Presentation Type: Oral Paper:Papers for Sections
Session: 10
Location: 215/SUB
Date: Monday, July 28th, 2008
Time: 10:30 AM
Number: 10003
Abstract ID:310


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