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Comparative functional ultrastructure of two hypersaline submerged cyanobacterial mats - Guerrero Negro, Baja California Sur, Mexico, and Solar Lake, Sinai, EgyptThe ultrastructure of the submerged microbial mat from the Solar Lake (SL), Egypt, was compared to that of samples from the Guerrero Negro (GN), Mexico, salt pans. The locations and distributions of the main organisms were determined light microscopy, and the corresponding ultrathin sections were examined under TEM; chemical microprofile analyses were carried out on the day of sampling for microscopic studies. Both communities were found to be dominated by Microleus chthonoplastes, although several morphological species found in the GN mat were absent from the SL mat, including the Tropica nigra and the 'big' Microleus chthonoplastes component. The chemical microprofiles of oxygen, sulfide, pH, and the oxygenic photosynthesis in the two mats were virtually identical. In both mats, the photic zone was restricted to the upper 800 microns of the mat, and oxygenic photosynthesis was detected down to 600 microns.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
D'Amelio, Elisa D'antoni
(NASA Ames Research Center Moffett Field, CA, United States)
Des Marais, David J.
(NASA Ames Research Center Moffett Field, CA, United States)
Cohen, Jehuda
(Jerusalem, Hebrew University Israel)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Life Sciences (General)
Accession Number
Distribution Limits

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