1998
DOI: 10.1007/s002489900095
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A Predictive Model of Bacterial Foraging by Means of Freely Released Extracellular Enzymes

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Cited by 213 publications
(199 citation statements)
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References 66 publications
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“…We therefore suggest a more parsimonious explanation is that differences in carbon quality between the treatments caused an uncoupling of bacterial catabolic and anabolic processes. Bacteria solubilize and catabolize available substrates at maximal rates, independent of their specific requirements (del Giorgio and Cole, 1998;Vetter et al, 1998). This results in reduced BGE when growth is constrained by factors such as temperature and nutrient supply, rather than organic carbon (energy) (del Giorgio and Cole, 1998).…”
Section: Discussionmentioning
confidence: 99%
“…We therefore suggest a more parsimonious explanation is that differences in carbon quality between the treatments caused an uncoupling of bacterial catabolic and anabolic processes. Bacteria solubilize and catabolize available substrates at maximal rates, independent of their specific requirements (del Giorgio and Cole, 1998;Vetter et al, 1998). This results in reduced BGE when growth is constrained by factors such as temperature and nutrient supply, rather than organic carbon (energy) (del Giorgio and Cole, 1998).…”
Section: Discussionmentioning
confidence: 99%
“…The good correlation of the kinetic rate constants k andk indicates that the kinetics of BSi dissolution is related to the kinetics of OM degradation, rather than to an intrinsic property of the solid BSi phase, as the latter would require a close coupling of BSi and OM in the particle downflux, which is not the case. Further investigations that integrate studies on how BSi and OM are associated within particles (Schrader, 1971;Tande and Slagstad, 1985;Ragueneau et al, 2002), the structure of diatom skeletons (Hecky et al, 1973;Wetherbee et al, 2000;Volcani, 2002), and models on the use and spreading of hydrolytic enzymes by bacteria (Vetter et al, 1998;Rothman and Forney, 2007) are necessary to elucidate the conditions under which bacteria may mediate BSi dissolution, and the low impact of sediment opal contents on its dissolution rate.…”
Section: Kinetics and Reactive Surface Areamentioning
confidence: 99%
“…Global POC, HM-DOC and LM-DOC pools are subdivided into three fractions each, defined according to turnover time and Redfield ratios, reflecting different inherent qualities, origin and degree of decomposition. Since the use of hydrolytic exoenzymes belongs to the disposal of bacterial foraging strategies, POC hydrolysis is enhanced by aerobic bacteria [52,12]. As only fermentation converts HM-DOC into LM-DOC, the distribution ratio of POC to the DOC-pools may create a fermentation bottleneck for subsequent mineralization processes.…”
Section: A2 Geochemical Reactionsmentioning
confidence: 99%