{"refrec":{"BRefID":16112,"RR":"<b>Yurkov, V.V.; van Gemerden, H.</b> (1993). Abundance and salt tolerance of obligately aerobic, phototrophic bacteria in a marine microbial mat. <i>Neth. J. Sea Res. 31(1)</i>: 57-62","BEntID":16112,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Neth. J. Sea Res. 31(1)</i>: 57-62","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Yurkov, V.V.; van Gemerden, H.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Yurkov, V.V.; van Gemerden, H.","Englishabstract":"Data have been collected on the abundance of obligately aerobic,bacteriochlorophyll-<i>a</i>-containing bacteria in a marine microbial mat on the West Frisian Island of Texel, the Netherlands. Plate counts on media rich in organic matter revealed average numbers of 3*10<sup>5</sup>·cm<sup>-3</sup> sediment in the top 10 mm of the mat; the number of purple non-sulphur bacteria was of the same magnitude. Due to the relatively small dimensions of obligately aerobic anoxygenic phototrophic bacteria and purple non-sulphur bacteria, compared to those of purple sulphur bacteria, the contributions of either of the two former groups to the biomass of Bchl-<i>a</i>-containing organisms was approximately 3%. The Specific Bchl-a-content of the isolated obligately aerobic phototrophs was very low (0.8 to 1.0 µg·mg<sup>-1</sup> protein) compared to that of purple non-sulphur bacteria (16 to 20 µg·mg<sup>-1</sup> protein), and purple sulphur bacteria (27 to 30 µg·mg<sup>-1</sup>). As a consequence, the relative contribution to the total Bchl <i>a</i> concentration of the two former groups (0.1% and 2.1%, respectively) was negligible, compared to that of the purple sulphur bacteria (97.8%). Salinities <50 had little effect on growth rate and yield of isolates; at salinities between 50 and 100 the doubling time increased progressively with a concomitant decrease in yield; no growth occurred at salinities >140.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Abundance and salt tolerance of obligately aerobic, phototrophic bacteria in a marine microbial mat","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:01.897972","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1993,"MonPub":null,"DateUpdate":"2001-09-17","DateCreate":"2001-08-20","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1993LD82400006","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":16112,"PubliDate":1993,"Pagination":"57-62","XtraPublOfAnaID":null,"ISBN":null,"Volume":"31","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44573,"SerRR":"Netherlands Journal of Sea Research. 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