Palmer LTER: Hydrogen peroxide in the Palmer-LTER region: IV. Photochemical interactions with dissolved organic matter. Karl, D. M. & Resing, J. Antarctic Journal of the United States, 1993.
abstract   bibtex   
There is a new 20th-century challenge to southern oceans microbial assemblages in the form of an increased flux of ultraviolet (UV) light caused by an erosion of the atmospheric ozone layer (Frederick and Snell 1988). Smith et al. (1992) and Helbling et al. (1992) recently documented growth inhibitory, UV-dependent effects on antarctic marine phytoplankton populations. We hypothesized that UV radiation might also play a role in micro- heterotrophic microbial processes by direct interactions with DOM. Two independent pathways are proposed: (1) partial photolytic degradation or alteration of refractory DOM resulting in a supply of readily available organic substrates for bacterial metabolism and (2) complete photolytic degradation of DOM. The former pathway would enhance heterotrophic bacterial processes; the latter would effectively constitute a form of competition for the availability of organic nutrients and, perhaps, provide an independent nonbiological pathway for DOM decomposition.
@article{karl_palmer_1993,
	title = {Palmer {LTER}: {Hydrogen} peroxide in the {Palmer}-{LTER} region: {IV}. {Photochemical} interactions with dissolved organic matter},
	volume = {28},
	abstract = {There is a new 20th-century challenge to southern oceans microbial assemblages in the form of an increased flux of ultraviolet (UV) light caused by an erosion of the atmospheric ozone layer (Frederick and Snell 1988). Smith et al. (1992) and Helbling et al. (1992) recently documented growth inhibitory, UV-dependent effects on antarctic marine phytoplankton populations. We hypothesized that UV radiation might also play a role in micro- heterotrophic microbial processes by direct interactions with DOM. Two independent pathways are proposed: (1) partial photolytic degradation or alteration of refractory DOM resulting in a supply of readily available organic substrates for bacterial metabolism and (2) complete photolytic degradation of DOM. The former pathway would enhance heterotrophic bacterial processes; the latter would effectively constitute a form of competition for the availability of organic nutrients and, perhaps, provide an independent nonbiological pathway for DOM decomposition.},
	number = {5},
	journal = {Antarctic Journal of the United States},
	author = {Karl, David M. and Resing, J.},
	year = {1993},
	keywords = {PAL}
}

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