{"refrec":{"BRefID":211232,"RR":"<b>Lorenzo, J.I.; Nieto-Cid, M.; Alvarez-Salgado, X.A.; Perez, P.; Beiras, R.</b> (2007). Contrasting complexing capacity of dissolved organic matter produced during the onset, development and decay of a simulated bloom of the marine diatom <i>Skeletonema costatum</i>. <i>Mar. Chem. 103(1-2)</i>: 61-75. <a href=\"http://dx.doi.org/10.1016/j.marchem.2006.05.009\" target=\"_blank\">dx.doi.org/10.1016/j.marchem.2006.05.009</a>","BEntID":203154,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Chem. 103(1-2)</i>: 61-75. <a href=\"https://dx.doi.org/10.1016/j.marchem.2006.05.009\" target=\"_blank\">https://dx.doi.org/10.1016/j.marchem.2006.05.009</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lorenzo, J.I.; Nieto-Cid, M.; Alvarez-Salgado, X.A.; Perez, P.; Beiras, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lorenzo, J.I. <i>et al.</i>","Englishabstract":"The capacity of natural dissolved organic matter (DOM) produced during the onset, development and decay of a simulated bloom of the marine diatom <i>Skeletonema costatum</i> to complex free copper has been followed for a 2 week period. Copper binding capacity of the culture was measured by anodic stripping voltammetry (ASV) with a hanging mercury drop electrode (HMDE). The concentration of dissolved organic carbon (DOC) and two fluorophores, M (humic-like, Ex/Em: 320 nm/410 nm) and T (protein-like, Ex/Em: 280 nm/350 nm), were followed during the course of the incubation. Models using DOC concentrations alone could not accurately predict the complexing capacity of the culture, especially at the end of the bloom, and better predictions were obtained when fluorescence measurements were considered. They were helpful in charactenising two types of copper ligands produced in the culture. The first type, traced by the fluorescence of peak T, was related to labile DOC directly exuded by phytoplankton. The second type, traced by the fluorescence of peak M, was the refractory humic-like material presumably produced in situ as a by-product of the bacterial degradation of phyrogenic materials. During the onset and development of the bloom (days 0 to 7), the fluorescence of peak T explains 60-80% of the total complexing capacity of the culture, suggesting that exuded \"protein-like\" compounds among other exuded complexing agents efficiently complexed free copper. On the contrary, during the decay (days 8 to 13), these ligands were replaced by humic substances as the complexing agent for copper.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Contrasting complexing capacity of dissolved organic matter produced during the onset, development and decay of a simulated bloom of the marine diatom <i>Skeletonema costatum</i>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"dissolved organic matter; phytoplankton culture; ligands; fluorescence;","OtherDescriptors":null,"Notes":null,"AnaPub":2007,"MonPub":null,"DateUpdate":"2012-01-24","DateCreate":"2011-12-22","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000243681700005","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.marchem.2006.05.009"},"refs":null,"anarec":{"AnaID":211232,"PubliDate":2007,"Pagination":"61-75","XtraPublOfAnaID":null,"ISBN":null,"Volume":"103","Issue":"1-2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43353,"SerRR":"Marine Chemistry. Elsevier: Amsterdam.  ISSN 0304-4203; e-ISSN 1872-7581","StandardTitleSer":"Marine Chemistry","ISSN":"0304-4203","AbbrevSer":"Mar. 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