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  • 1
    Electronic Resource
    Electronic Resource
    Halocins: are they involved in the competition between halobacteria in saltern ponds? (2000)
    Springer
    Extremophiles 4 (2000), S. 35-41 
    Details
    ISSN: 1433-4909
    Keywords: Key words Halocins ; Halobacteria ; Salterns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Many representatives of the family Halobacteriaceae ("halobacteria") excrete halophilic bacteriocins (halocins) that inhibit the growth of other halobacteria. In spite of the fact that halocin production is widespread among the Halobacteriaceae, no information is available on their ecological significance. To test whether halocins may play a role in the interspecies competition between dif-ferent types of halobacteria in saltern crystallizer ponds inhabited by dense communities of these red halophiles, we assayed for halocins active against a variety of halobacteria in salterns from different locations worldwide. Detection of halocin activity was based on the inhibition of growth of indicator organisms on agar plates, the decreased incorporation of radiolabeled substrates, and microscopic examinations. No halocin activity was detected in any of the brines examined, in spite of the fact that halocin production was demonstrated in cultures of most microorganisms isolated from these brines. Thus, the contribution of halocins in the competition between different halobacteria in hypersaline aquatic environments is probably negligible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007920050005
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  • 2
    Electronic Resource
    Electronic Resource
    Comparisons of the polar lipid and pigment profiles of two solar salterns located in Newark, California, U.S.A., and Eilat, Israel (2000)
    Springer
    Extremophiles 4 (2000), S. 259-265 
    Details
    ISSN: 1433-4909
    Keywords: Key words Solar salterns ; Halophilic Archaea ; Halophilic Bacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The whole community pigments and lipids have been examined during a 5-year period in two commercial solar salterns located in the United States and in Israel. There were significant differences in the complexity of the lipid and pigment patterns within the California saltern system, and these differences were not consistent over the sampling period despite examination of ponds with the same salinity. The solar saltern system in Eilat, Israel, showed greater consistency during this sampling period and compared directly with previous studies. The complexity of the saltern in Newark, California, could be explained on the basis of the prevailing weather conditions (cooler and more rainfall) and the nutrient-enriched source water. The Eilat saltern, however, has an oligotrophic water source and has a considerably warmer and drier climate. This difference resulted in more diverse and more complex pigment and lipid patterns and presumably microbial populations in the Newark, California, plant than in the saltern in Eilat, Israel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007920070011
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    Paper (German National Licenses)
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