FN Archimer Export Format PT J TI Ultraviolet radiation induces reversal of the bioavailability of DOM to marine bacterioplankton BT AF OBERNOSTERER, I SEMPERE, R HERNDL, GJ AS 1:1;2:2;3:1; FF 1:;2:;3:; C1 Netherlands Inst Sea Res, Dept Biol Oceanog, NIOZ, NL-1790 AB Den Burg, Netherlands. CNRS, UPR 223, Lab Microbiol Marine, F-13288 Marseille 9, France. C2 INST SEA RESEARCH (NIOZ), NETHERLANDS CNRS, FRANCE IF 2.376 TC 41 UR https://archimer.ifremer.fr/doc/00220/33170/31686.pdf LA English DT Article CR ANTARES 4 BO Marion Dufresne DE ;dissolved organic matter;ultraviolet radiation;DOM-photoreactivity;bacterioplankton;Southern Ocean AB 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. PY 2001 PD MAR SO Aquatic Microbial Ecology SN 0948-3055 PU Inter-research VL 24 IS 1 UT 000168208300007 BP 61 EP 68 DI 10.3354/ame024061 ID 33170 ER EF