By John W. Doran (auth.), K. C. Marshall (eds.)
This quantity of Advances in Microbial Ecology marks a metamorphosis within the editor send of the sequence. The Editorial Board needs to take this chance to precise its gratitude to Martin Alexander, the founding editor and editor of the 1st 5 volumes, for his firm in setting up the sequence and in making sure that Advances has develop into an exceptional point of interest for the identity of latest advancements within the swiftly increasing box of microbial ecology. With the booklet of this quantity, we welcome Howard Slater to the Editorial Board. The regulations of the Editorial Board stay almost like ahead of. such a lot con tributions to Advances in Microbial Ecology may be solicited via the Board. notwithstanding, people are inspired to post outlines of unsolicited contri butions to the Board for attention for inclusion within the sequence. Advances is designed to serve a global viewers and to supply severe stories on simple and utilized facets of microbial ecology. Contributions within the current quantity are predominantly considering the ecology of aquatic microorganisms, yet surround a number of methods to this region. The exception is the bankruptcy via J. W. Doran at the function of micro organisms within the biking of selenium. G-Y. Rhee discusses the results of envi ronmental components on phytoplankton development. the criteria restricting the produc tivity of freshwater microbial ecosystems are thought of through H. W. Paerl.
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1975; McDonald and Duncan, 1979). Biological inputs to atmospheric Se would follow this pattern, but anthropogenic inputs should peak in fall and winter when combustion of fossil fuel is greatest. As mentioned earlier, microorganisms play an important role in the production of methylated Se compounds that are released into the atmosphere. , 1942). , 1968). Measurements of air over soil and sediments in New York State reveal that volatile Se is being released to the atmosphere even in low-Se regions (Doran, 1976).
Mudd, S. , and Catoni, G. , 1964, Biological transmethylation, methyl group transfer and other "one-carbon" metabolic reactions dependent upon tetrahydrofolic acid, in: Comprehensive Biochemistry, Vol. 15 (M. Florkin and E. ), pp. 1-47, Elsevier, Amsterdam. Muth, O. , Oldfield, J. , and Weswig, P. , 1967, Symposium: Selenium in Biomedicine, AVI Publ. , Westport, Conn. Natl. Acad. , Nat. Res. C. Nickerson, W. , 1963, Enzymatic reduction of selenite, J. Bacteriol. 85:763771. Obermeyer, B. , Palmer, I.
Paasche, 1975). In extrapolating the kinetic values obtained in the laboratory to natural environments, however, one must keep in mind that these values can vary with environmental conditions. The ratio of monovalent to divalent ions influences growth characteristics (Miller and Fogg, 1957; Provasoli, 1958); light and temperature alter both JLm and Ks (see below); and even the rate of agitation affects Ks (Skoglund and Jensen, 1976). For organisms with diel periodicities in division such as most planktonic algae, equation (3) can describe only nonperiodic and random division under continuous illumination or the relationship between JL and S at a specific time of the cell division cycle.