CS29 Phytoplankton & Primary Production
Date: Tuesday, June 11, 2002
Location: Poster Session - VCC
 
HollibaughJT, Dept Marine Sciences, Univ Georgia, Athens GA, USA, aquadoc@deletethis.uga.edu
Rocap, G, , Univ. Washington, Seattle, WA, USA, rocap@deletethis.ocean.washington.edu
Ahlgren, N, , Massachusetts Inst. Technology, Cambridge MA, USA, nahlgren@deletethis.mit.edu
Chisholm, S, W, Massachusetts Inst. Technology, Cambridge, USA, chisholm@deletethis.mit.edu
Nelson, J, , Univ. Georgia, Athens GA, USA, jnelson@deletethis.arches.uga.edu
Jellison, R, S, Univ. California, Santa Barbara CA, USA, jellison@deletethis.lifesci.ucsb.edu,
 
AN UNUSUAL SYNECHOCOCCUS FROM MONO LAKE, CALIFORNIA
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Mono Lake is an alkaline, hypersaline lake in eastern California that has been meromictic since 1995. During a phylogenetic survey of the lake's microbial assemblage, a 16S rRNA gene sequence was encountered that branched deeply on the Synechococcus side of the Synechococcus-Prochlorococcus cluster of the cyanobacteria. Flow cytometric and microscopic examination of lake water samples reveled a small rod (0.8 x 2 um) exhibiting orange autofluorescence. Abundances were low (<10^4 cells/mL) in surface waters but increased sharply to >10^6/mL in the hypolimnion (>26 m). This distribution coincided with the distribution of a diagnostic band expressed in PCR/DGGE analysis. The base of the photic zone (ca 1% Io) ranges from depths of 2-14 m and is marked by a dense