{"refrec":{"BRefID":286483,"RR":"<b>Lyngsgaard, M.M.; Markager, S.; Richardson, K.; M\u00f8ller, E.F.; Jakobsen, H.H.<\/b> (2017). How well does chlorophyll explain the seasonal variation in phytoplankton activity? <i>Est. Coast. 40(5)<\/i>: 1263-1275. <a href=\"https:\/\/dx.doi.org\/10.1007\/s12237-017-0215-4\" target=\"_blank\">https:\/\/dx.doi.org\/10.1007\/s12237-017-0215-4<\/a>","BEntID":278507,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":" <i>Est. Coast. 40(5)<\/i>: 1263-1275. <a href=\"https:\/\/dx.doi.org\/10.1007\/s12237-017-0215-4\" target=\"_blank\">https:\/\/dx.doi.org\/10.1007\/s12237-017-0215-4<\/a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lyngsgaard, M.M.; Markager, S.; Richardson, K.; M\u00f8ller, E.F.; Jakobsen, H.H.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lyngsgaard, M.M. <i>et al.<\/i>","Englishabstract":"The seasonal variation in phytoplankton activity is determined by analysing 1385 primary production (PP) profiles, chlorophyll a (Chl) concentration profiles and phytoplankton carbon biomass concentrations (C) from the period 1998\u20132012. The data was collected at six different stations in the Baltic Sea transition zone (BSTZ) which is a location with strong seasonal production patterns with light as the key parameter controlling this productivity. We show that the use of Chl as a proxy for phytoplankton activity strongly overestimates the contribution from the spring production to annual pelagic carbon flow. Spring (February and March) Chl comprised 16\u201330% of the total annual Chl produced, whereas spring C was much lower (8\u201323%) compared to the annual C. Spring PP accounted for 10\u201318% of the total annual PP, while the July\u2013August production contributed 26\u201333%, i.e. within the time frame when zooplankton biomass and grazing pressure are highest. That is, Chl failed in this study to reflect the importance of the high summer PP. A better proxy for biomass may be C, which correlated well with the seasonal pattern of PP (Pearson correlation, p < 0.05). Thus, this study suggests to account for the strong seasonal pattern in C\/Chl ratios when considering carbon flow in coastal systems. Seasonal data for PP were fitted to a simple sinusoidal wave model describing the seasonal distribution of PP in the BSTZ and were proposed to present a better parameterizaton of PP in shallow stratified temperate regions than more commonly applied proxies.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"How well does chlorophyll explain the seasonal variation in phytoplankton activity?","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-07 01:31:36.886655","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Spring bloom primary production; Seasonal variation; Nutrient concentration; Chlorophyll a; Phytoplankton biomass   ","OtherDescriptors":null,"Notes":null,"AnaPub":2017,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2017-06-29","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000406333700004","VABBcode":null,"OpenAcc":0,"DOI":"10.1007\/s12237-017-0215-4"},"refs":null,"anarec":{"AnaID":286483,"PubliDate":2017,"Pagination":"1263-1275","XtraPublOfAnaID":null,"ISBN":null,"Volume":"40","Issue":"5","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":101945,"SerRR":"Estuaries and Coasts. 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