Sökning: onr:"swepub:oai:DiVA.org:umu-52548" >
Photochemically ind...
-
Bertilsson, Stefan
(författare)
Photochemically induced changes in bioavailable carbon and nitrogen pools in a boreal watershed
- Artikel/kapitelEngelska1999
Förlag, utgivningsår, omfång ...
-
Oldendorf :Inter-Research,1999
-
printrdacarrier
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:umu-52548
-
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-52548URI
-
https://doi.org/10.3354/ame019047DOI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
In several recent studies, a net stimulation of bacterial growth has been demonstrated after exposing humic surface waters to solar radiation or artificial ultraviolet radiation. This stimulation has been attributed to a photochemical release of bioavailable carbon or nitrogen compounds (ammonium). In a synoptic experiment, we exposed 0.2 mu m filtered water from 12 different habitats in a river system, dominated by allochthonous carbon input, to mild artificial UV radiation. A significant photochemical release of carboxylic acids of low molecular weight occurred. Furthermore, the exposure increased carbon-limited bacterial yield on average by a factor of 1.7. No photochemical production of free ammonium could be detected, which was in accordance with the lack of effects of radiation on bacterial growth yield under nitrogen-limited conditions. We conclude that, in boreal systems dominated by allochthonous carbon input, photochemical production of bioavailable carbon rather than nitrogen compounds is likely to positively influence the total substrate pool available for bacterial utilization.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Stepanauskas, Ramonas
(författare)
-
Cuadros-Hansson, RocioUmeå universitet,Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet),Johan Wikner ; UMFpub
(författare)
-
Graneli, Wilhelm
(författare)
-
Wikner, Johan,1961-Umeå universitet,Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet),Umeå marina forskningscentrum (UMF),Johan Wikner(Swepub:umu)jowi0002
(författare)
-
Tranvik, Lars
(författare)
-
Umeå universitetInstitutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet)
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Aquatic Microbial EcologyOldendorf : Inter-Research19:1, s. 47-560948-30551616-1564
Internetlänk
Hitta via bibliotek
Till lärosätets databas