By J. Gijs Kuenen, Lesley A. Robertson, Hans Van Gemerden (auth.), K. C. Marshall (eds.)
Advances in Microbial Ecology was once verified by means of the foreign Com mittee on Microbial Ecology (ICOME) as a motor vehicle for the book of serious reports chosen to mirror present developments within the ever-expanding box of microbial ecology. lots of the chapters present in Advances in Microbial Ecology were solicited via the Editorial Board. people are inspired, although, to put up outlines of unsolicited contributions to any member of the Editorial Board for attention for inclusion in a next quantity of Advances. Contributions are anticipated to be in intensity, even provocative, experiences of topical curiosity with regards to the ecology of microorganisms. With the ebook of quantity eight of Advances we welcome to the panel of participants Martin Alexander, the founding editor of this sequence, who discusses the variety of average constraints on nitrogen fixation in agri cultural ecosystems. Ecological elements of cellulose degradation are dis stubborn by way of L. G. Ljungdahl and ok. -E. Eriksson, and of heavy steel responses in microorganisms by means of T. Duxbury. In his bankruptcy, A. Lee con siders the gastrointestinal tract as an ecological procedure, and reviews at the probability of manipulating the program. The advanced interactions between cardio and anaerobic sulfur-oxidizing micro organism are mentioned by way of normal habitats and chemostat tradition by means of J. G. Kuenen, L. Rob ertson, and H. van Gemerden. ultimately, J. A. Robinson offers the benefits and boundaries within the use of nonlinear regression research in deciding upon microbial kinetic parameters in ecological occasions. ok. C. Marshall, Editor R. M. Atlas B. B.
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Extra info for Advances in Microbial Ecology: Volume 8
Thiobacillus organoparus is a facultatively chemolithotrophic bacterium that can utilize reduced sulfur compounds, but not ferrous iron (Markosyan, 1973). It has since been shown that if Leptospirillum ferrooxidans is mixed with other sulfide-oxidizing bacteria, such as T. thiooxidans or T. acidophilus, the rapid degradation of pyrite occurs (Kelly, 1978; Norris and Kelly, 1978). Since T. thiooxidans is itself an obligate chemolithotroph, the stimulation is unlikely, in this case, to be due to the removal by the secondary population of organic excretory products.
1, this is particularly important under light-limiting conditions. Under saturating light conditions other differences come into play in the competition between these groups of bacteria. Such an example can be found in the competition of Chromatium and Chlorobium species for sulfide. Both Chromatium and Chlorobium oxidize sulfide to sulfate, with the temporary accumulation of elemental sulfur, the difference being that the latter deposits the sulfur outside the cells, whereas Chromatium stores the sulfur intracellularly.
Conceivably, the Chlorobiaceae can grow at greater depth because of the lower light requirement generally observed in these organisms. 4. Competition between Colorless and Phototrophic Sulfur Bacteria Habitats where the total turnover of inorganic and organic compounds is heavily dominated by the sulfur cycle are called sulfureta. They are often characterized by heavy blooms of phototrophic bacteria, and, particularly when the bloom occurs on the surface of a sediment, blooms of colorless sulfur bacteria, especially Beggiatoa, have been found.