Ultraviolet radiation induces reversal of the bioavailability of DOM to marine bacterioplankton

2-fold higher in the <20 kDa fraction than in the bulk DOM. These results clearly indicate that initially bioreactive DOM can be rendered biologically more recalcitrant by exposure to solar radiation, while DOM of initially low bioavailability can be, at least partly, photochemically transformed...

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Bibliographic Details
Published in:Aquatic Microbial Ecology
Main Authors: Obernosterer, I, Sempere, R, Herndl, Gj
Format: Article in Journal/Newspaper
Language:English
Published: Inter-research 2001
Subjects:
dissolved organic matter
ultraviolet radiation
DOM-photoreactivity
bacterioplankton
Southern Ocean
Online Access:https://archimer.ifremer.fr/doc/00220/33170/31686.pdf
https://doi.org/10.3354/ame024061
https://archimer.ifremer.fr/doc/00220/33170/
Description
Summary:2-fold higher in the <20 kDa fraction than in the bulk DOM. These results clearly indicate that initially bioreactive DOM can be rendered biologically more recalcitrant by exposure to solar radiation, while DOM of initially low bioavailability can be, at least partly, photochemically transformed to compounds of higher biological reactivity.

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