Microbial Mats: Structure, Development and Environmental by Richard W. Castenholz (auth.), Lucas J. Stal, Pierre

By Richard W. Castenholz (auth.), Lucas J. Stal, Pierre Caumette (eds.)

Microbial mats are benthic groups of a number of microorganisms. Their research calls for multidisciplinary reports and shut cooperation among microbiologists, biogeochemists, and geologists.
Reported listed here are fresh advances within the examine of constitution, improvement and ecological relationships. The method defined comprises microsensors in addition to new molecular innovations for the detection and identity of microorganisms. expanding curiosity exists for utilized points, e.g. the chance to take advantage of typical or built microbial mats for the degradation of xenobiotics, for website remediation, etc.

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II. Nucleotide sequence analysis of the 16S ribosomal RNA. J Phyco128: 828-838 Yun Z (1986) Thermophilic microorganisms in the hot springs ofTengchong geothermal area, West Yunnan, China. Geothermics 15: 347-358 Zeng YB, Ward DM, Brassell S, Eglinton G (1992a) Biogeochemistry of hot spring environments. 2. Lipid composition of Yellowstone (Wyoming, USA) cyanobacterial and Chloroflexus mats. Chern Geo195: 327-345 Zeng YB, Ward DM, Brassell S, Eglinton G (1992b) Biogeochemistry of hot spring environments.

Chthonoplastes preincubated with or without elevated amount of iron 1. Low Fe medium High Fe medium JLmol r1 S2- Sulfide addition 300 300 reovery from the medium 280 o recovery from the cells 40 3 1Cells were preincubated for 24 h with 250 JLM Fe3+ in standard ASN 3 medium (Rippka et al. 1979) (high Fe medium) or in regular ASN 3 medium (low Fe medium). The cells were exposed to sulfide for 3 h in the dark under anoxic conditions. 50 0 ••• E ... 25 1 ! 00 0 10 20 30 Time (min) Fig. 3. Effect of 1 mM additions of sulfide (arrows) on oxygen exchange in Microcoleus chthonoplastes.

1983; 20, Zeikus and Wolfe 1972; 21, Sandbeck and Ward 1982; 22, Ward et al. 1992. sequences, so that the molecular method could overestimate species diversity (see Ward et al. 1992), but this is known to occur rarely, especially among bacteria. It seems more likely that by using such a conservative genetic marker (pace et al. 1986; Ward et al. 1992) we are underestimating biodiversity. Sixteen species are known on the basis of previous culture work, including two Thermoleophilum species, T. album and T.

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