{"refrec":{"BRefID":36033,"RR":"<b>Prezelin, B.B.; Glover, H.E.; Ver Hoven, B.; Steinberg, D.; Matlick, H.A.; Schofield, O.; Nelson, N.; Wyman, M.; Campbell, L.</b> (1989). Blue-green light effects on light-limited rates of photosynthesis: relationship to pigmentation and productivity estimates for <i>Synechococcus</i> populations from the Sargasso Sea. <i>Mar. Ecol. Prog. Ser. 54</i>: 121-136. <a href=\"https://dx.doi.org/10.3354/meps054121\" target=\"_blank\">https://dx.doi.org/10.3354/meps054121</a>","BEntID":36033,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 54</i>: 121-136. <a href=\"https://dx.doi.org/10.3354/meps054121\" target=\"_blank\">https://dx.doi.org/10.3354/meps054121</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Prezelin, B.B.; Glover, H.E.; Ver Hoven, B.; Steinberg, D.; Matlick, H.A.; Schofield, O.; Nelson, N.; Wyman, M.; Campbell, L.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Prezelin, B.B. <i>et al.</i>","Englishabstract":"The impact of blue-green light incubation on short-term diurnal, daily, and integrated water column estimates of whole water (> 0.2 ltm) and <i>Synechococcus</i>-specific photosynthesis was assessed throughout the euphotic zone at 2 stations in the Sargasso Sea. Replicate samples were incubated under both tungsten white light and broad band blue-green light, where the latter simulated light quality within the upper water column of the open sea. Diurnal variations in size-fractioned (0.2-0.6 ~m, 0.6-1 ~m, and 1-5 ~) blue-green vs white light photosynthesis-irradiance (P-I) curves, chlorophyll (ChI) and phycoerythrin (PE) concentrations, and cell abundance of PE-rich cyanobacterial <i>Synechococcus</i> spp. and Chl-fluorescing algae, were measured within samples from the surface, PE maximum, Chl maximum, and the base of the euphotic zone. <i>Synechococcus</i> spp. dominated ultraphytoplankton communities down to the light depths of the PE maximum (3 to 7 % surface illumination, 10)' with maxima in cell abundance routinely located at light depths;=: 50% 10, Blue-green and white light incubation conditions generally did not affect light-saturated rates of photosynthesis (Pmax) but blue-green light routinely did provide much higher estimates of light-limited rates of photosynthesis (alpha). For size-fractioned sub populations dominated by <i>Synechococcus</i> spp, blue-green light values of alpha were;=: 5-fold greater than white light estimates. Compared to white light estimates, bluegreen light estimates of total (> 0.2 ~m) daily integrated water column primary productivity were 6 to 13 % higher, while the contribution of <i>Synechococcus</i> spp. to overall primary production rose from between 57 and 61% to between 73 and 84°10. From the surface down to about 5% 10, the PE content of <i>Synechococcus</i> cells increased with decreasing light and/or increasing inorganic nitrogen availability. Increases in <i>Synechococcus</i> PE/cell occurred in direct proportion to blue-green light measurements of photosynthetic quantum efficiency, further indicating that these cyanobacteria are physiologically well suited to harvest photosynthetically utilize able light throughout a large portion of the euphotic zone.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Blue-green light effects on light-limited rates of photosynthesis: relationship to pigmentation and productivity estimates for <i>Synechococcus</i> populations from the Sargasso Sea","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-08 01:31:54.614412","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1989,"MonPub":null,"DateUpdate":"2014-09-03","DateCreate":"2003-07-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1989AB53400012","VABBcode":null,"OpenAcc":1,"DOI":"10.3354/meps054121"},"refs":null,"anarec":{"AnaID":36033,"PubliDate":1989,"Pagination":"121-136","XtraPublOfAnaID":null,"ISBN":null,"Volume":"54","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. 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