{"refrec":{"BRefID":98216,"RR":"<b>Alderkamp, A.-C.; Nejstgaard, J.C.; Verity, P.G.; Zirbel, M.J.; Sazhin, A.F.; van Rijssel, M.</b> (2006). Dynamics in carbohydrate composition of <i>Phaeocystis pouchetii</i> colonies during spring blooms in mesocosms. <i>J. Sea Res. 55(3)</i>: 169-181. <a href=\"http://dx.doi.org/10.1016/j.seares.2005.10.005\" target=\"_blank\">dx.doi.org/10.1016/j.seares.2005.10.005</a>","BEntID":93571,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Sea Res. 55(3)</i>: 169-181. <a href=\"https://dx.doi.org/10.1016/j.seares.2005.10.005\" target=\"_blank\">https://dx.doi.org/10.1016/j.seares.2005.10.005</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Alderkamp, A.-C.; Nejstgaard, J.C.; Verity, P.G.; Zirbel, M.J.; Sazhin, A.F.; van Rijssel, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Alderkamp, A.-C. <i>et al.</i>","Englishabstract":"The colony-forming microalgae <i>Phaeocystis</i> produces two major pools of carbohydrates: mucopolysaccharides in the colony matrix and intracellular storage glucan. Both have different functions and separate degradation pathways in the ecosystem, so a partial precipitation method was developed to distinguish the dynamics of the two pools. Changes in concentration in response to variation in nutrients and irradiance were followed during a spring bloom of <i>Phaeocystis pouchetii</i> colonies in mesocosms near Bergen, Norway. Upon nutrient limitation, the carbohydrate to carbon ratio of the colonies increased from 15% during the growth phase, to more than 50% during the decline phase. During the growth phase of the bloom, the carbohydrate concentration and composition were influenced by irradiance: glucan concentrations showed strong diel dynamics and increased with higher light levels, whereas mucopolysaccharide concentrations were unaffected. During the exponential growth phase, glucan contributed 6-11% to <i>P. pouchetii</i> carbon, depending on the time of the day. During the decline of the bloom, the glucan contribution increased up to 60%. We provide further evidence for the concept that the <i>Phaeocystis</i> colony matrix is built with a relatively small but constant amount of carbohydrates, compared to the large quantities of glucan produced during <i>Phaeocystis</i> spring blooms. Since a major part of <i>Phaeocystis</i> primary production is recycled in the water column by bacteria, this vast glucan injection is a potential determinant of the magnitude and composition of the microbial community following a bloom.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Dynamics in carbohydrate composition of <i>Phaeocystis pouchetii</i> colonies during spring blooms in mesocosms","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":"algae; polysaccharides; mucus; glucan; laminarin; diel","OtherDescriptors":null,"Notes":null,"AnaPub":2006,"MonPub":null,"DateUpdate":"2012-05-25","DateCreate":"2006-04-20","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000236644500001","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.seares.2005.10.005"},"refs":null,"anarec":{"AnaID":98216,"PubliDate":2006,"Pagination":"169-181","XtraPublOfAnaID":null,"ISBN":null,"Volume":"55","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43261,"SerRR":"Journal of Sea Research. 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