{"refrec":{"BRefID":15499,"RR":"<b>Joiris, C.</b> (1977). A propos du rôle des bactéries planktoniques dans les écosystèmes marins, <b><i>in</i></b>: Elskens, I. <i>et al.</i> (Ed.) <i>Studie en beheer van het mariene systeem: 4de Colloquium E4-77, Louvain-la-Neuve, 18 juli-5 augustus 1977, vol. 2.</i> pp. 244-267","BEntID":15499,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":", <b><i>in</i></b>: Elskens, I. <i>et al.</i> <i>Studie en beheer van het mariene systeem: 4de Colloquium E4-77, Louvain-la-Neuve, 18 juli-5 augustus 1977, vol. 2.</i> pp. 244-267","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Joiris, C.","OrigTitleTranslFlag":1,"Authorstringtrunc":"Joiris, C.","Englishabstract":"Resulting from synecological studies in some areas of the southern North Sea, a contradiction became evident between measurements of primary production and determinations of the activities consuming organic matter. In the Southern Bight, the consumption is 10 to 20 times higher than the production. This means that the primary production has been underestimated, and/or the consumption over-estimated. In order to discuss the validity of the methods used for determining the respiration activities, some results are presented:a. During a 24 h cycle at the Sluice-Dock of Ostend, the variations of the oxygen concentration in the water are explained by the measured activities and diffusion fluxes;b. Two different methods are shown to give comparable results: the initial rate of oxygen consumption and the anapleratic fixation of CO<sub>2</sub>.The extrapolation of measured respiration rates in function of time and depth is discussed. The obtained results for organic matter, respiration activities and their ratio: the turnover rate, are compared with other ones from the literature. No argument was found against the validity of the methods used for the determination of respiration activities. Therefore, it is suggested to look also for possible errors in the evaluation of primary production, and more particularly to the repsiration and excretion activities of phytoplankton in the dark: at night and under the euphatic zone.","AbstractOtherLang":"Au cours d'un travail d'équipe concernant l'étude synécologique de plusieurs biotopes du secteur sud-est de la Mer du Nord, est apparue une contradiction entre les mesures de production primaire et de consommation de matières organiques ainsi formées. La consommation est de 10 à 20 fois plus élevée que la production. Ces résultats indiquent que la production primaire a été sous-estimée et/ou que la consommation a été surévaluée. C'est pourquoi la validité des méthodes utilisées doit être discutée. Dans le cas des activités de consommation, les résultats obtenus semblent corrects et sont en accord avec les données de la littérature. Aucun argument n'ayant été trouvé contre la validité des résultats de consommation des matières organiques, il est suggéré que la source d'erreur puisse se situer au niveau de la production primaire, et plus particulièrement au niveau de la respiration et de l'excrétion phytoplanktoniques à l'obscurité, c'est-à-dire tant de nuit que sous la zone euphotique.","BibLvlCode":"AM","StandardTitle":"A propos du rôle des bactéries planktoniques dans les écosystèmes marins","OrigTitleLangCode":"fr","OrigTitleLangCodeExtended":"fre","OrigTitleLangID":22,"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":1977,"MonPub":null,"DateUpdate":"2019-06-13","DateCreate":"2001-08-13","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":15499,"PubliDate":1977,"Pagination":"244-267","XtraPublOfAnaID":null,"ISBN":null,"Volume":null,"Issue":null,"BRefMon":15437,"BRefMonRR":"<b>Elskens, I. <i>et al.</i> (Ed.)</b> (1977). Studie en beheer van het mariene systeem: 4de Colloquium E4-77, Louvain-la-Neuve, 18 juli-5 augustus 1977, vol. 2. 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