NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Whiting events: biogenic origin due to the photosynthetic activity of cyanobacterial picoplanktonAn annual whiting event occurs each year in late May to early June in Fayetteville Green Lake, New York. The initiation of this event correlates with exponential growth of the Synechococcus population within the lake. Synechococcus is the dominant (by approximately 4 orders of magnitude) autotrophic organism owing to the oligotrophic condition of the lake. The delta 13C values of the dissolved inorganic C range seasonally from -9.5% in winter to -6.2% in summer due to photosynthetic activity. Calcite precipitates principally in the microenvironment surrounding Synechococcus because of a photosynthetically driven alkalization process and the availability of the cells as nucleation sites. This calcite has a heavier delta 13C value (>4%) than does the dissolved inorganic C of the lake water owing to the cells' preferential uptake of 12C. A conceptual model suggests that photosynthetic activity and cell surface chemistry, together with the substantial surface area that arises from the great abundance of micron-sized cells, allow Synechococcus to dominate the annual whiting events in Fayetteville Green Lake.
Document ID
20040089289
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Thompson, J. B.
(Eckerd College St. Petersburg, Florida 33711, United States)
Schultze-Lam, S.
Beveridge, T. J.
Des Marais, D. J.
Date Acquired
August 21, 2013
Publication Date
January 1, 1997
Publication Information
Publication: Limnology and oceanography
Volume: 42
Issue: 1
ISSN: 0024-3590
Subject Category
Exobiology
Distribution Limits
Public
Copyright
Other
Keywords
NASA Center ARC
NASA Discipline Exobiology

Available Downloads

There are no available downloads for this record.
No Preview Available