{"refrec":{"BRefID":221129,"RR":"<b>Bouillon, S.; Abril, G.; Borges, A.V.; Dehairs, F.; Govers, G.; Hughes, H.J.; Merckx, R.; Meysman, F.J.R.; Nyunja, J.; Osburn, C.; Middelburg, J.J.</b> (2009). Distribution, origin and cycling of carbon in the Tana River (Kenya): a dry season basin-scale survey from headwaters to the delta. <i>Biogeosciences 6(11)</i>: 2475-2493. <a href=\"http://dx.doi.org/10.5194/bg-6-2475-2009\" target=\"_blank\">http://dx.doi.org/10.5194/bg-6-2475-2009</a>","BEntID":212859,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Biogeosciences 6(11)</i>: 2475-2493. <a href=\"http://dx.doi.org/10.5194/bg-6-2475-2009\" target=\"_blank\">http://dx.doi.org/10.5194/bg-6-2475-2009</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Bouillon, S.; Abril, G.; Borges, A.V.; Dehairs, F.; Govers, G.; Hughes, H.J.; Merckx, R.; Meysman, F.J.R.; Nyunja, J.; Osburn, C.; Middelburg, J.J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Bouillon, S. <i>et al.</i>","Englishabstract":"The Tana River basin (TRB) is the largest in Kenya (~120 000 km<sup>2</sup>). We conducted a survey during the dry season throughout the TRB, analyzing a broad suite of biogeochemical parameters. Biogeochemical signatures in headwater streams were highly variable. Along the middle and lower river course, total suspended matter (TSM) concentrations increased more than 30-fold despite the absence of tributary inputs, indicating important resuspension events of internally stored sediment. These resuspended sediment inputs were characterized by a lower and <sup>14</sup>C-depleted OC content, suggesting selective degradation of more recent material during sediment retention. Masinga Dam (a large reservoir on the upper river) induced a strong nutrient retention (~50% for inorganic N, ~72% for inorganic phosphate, and ~40% for dissolved silicate). Moreover, while DOC pools and d<sup>13</sup>C signatures were similar above, in and below the reservoir, the POC pool in Masinga surface waters was dominated by <sup>13</sup>C-depleted phytoplankton, which contributed to the riverine POC pool immediately below the dam, but rapidly disappeared further downstream, suggesting rapid remineralization of this labile C pool in the river system. Despite the generally high turbidity, the combination of relatively high oxygen saturation levels, low d<sup>18</sup>O signatures of dissolved O<sub>2</sub> (all <+24.2‰), and the relatively low <i>p</i>CO<sub>2</sub> values suggest that in-stream primary production was significant, even though pigment data suggest that phytoplankton makes only a minor contribution to the total POC pool in the Tana River.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Distribution, origin and cycling of carbon in the Tana River (Kenya): a dry season basin-scale survey from headwaters to the delta","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2009,"MonPub":null,"DateUpdate":"2013-07-26","DateCreate":"2012-12-12","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000272232200009","VABBcode":null,"OpenAcc":1,"DOI":"10.5194/bg-6-2475-2009"},"refs":null,"anarec":{"AnaID":221129,"PubliDate":2009,"Pagination":"2475-2493","XtraPublOfAnaID":null,"ISBN":null,"Volume":"6","Issue":"11","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":68092,"SerRR":"<b>Gattuso, J.P.; Kesselmeier, J. 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