6 Benthic Heterotrophs - Benthic Heteretrephic Micrcbes 1'...

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Unformatted text preview: Benthic Heteretrephic Micrcbes 1' Heteretrephic bacteria & preteseans '- Enhancement cf bacterial numbers in the sediment versus water celumn ' Vertical sequence cf bacterial metabelic types ' Substrates fer heteretrephic bacteria (bettem up centrels) 1' Bacterial gras ers (tap dawn centrels) Sedimth Nficmbe Types 1' Many [if the same grflups ffllllld in the water culumn (bacteria, flagellates, ciliates, fflraminifera, and ameflba) 1' Bacteria may be — Phutuaututrnphic (Cyannphyta) — Pl] 01:11]] eter ntr nphic { Sulfur h anteria) — Ehemnaututrnphic (Beggiatna) — Ehemnhflter ntr nphic (Greatest-variety) Differences in PQM, DOM and Bacteria in the Water versus Sediments ' POM 100-1000 X water eeaeeatratiea 1' DOM 2 - 10 X water eeaeeatratiea ' Bacteria 100 - 1000 X water eeaeeatratiea — estuarine water HE I III] —mudd}r sediment IE? I all Vertical Sequence of Neil- Phetosynthetic Bacteria - Aerebic chemeheteretrepha (OZ reepirers) - Aerebic chemeheteretrepha (N03 respirera) - Chemeautetrephs I Anaerebic ferm entative bacteria - Anaerebic sulphate reducing bacteria - Methanegeuic bacteria Bacterial Substrates 1' Must ultimately be disselred erganie niatter (DOM) 1' Medes ef prednetien — Eielegical (slept-y feeding, antelysis, escretia, enayniatic) —Ahielegical (leaching, disaggregatien) 1' Majer qualitative determinants — (energy centent, strnctnrial characteristics, [EN centent) Gl'azers on bacteria ' Viral impacts *- Prntoz Ina (flagellates, ciliates, etc) *- Meiflfauna (anal. tn cupepnds} '- Macrnfauna (nu anal. in water cnlumn} *- Fish (detritivures) Role of Benthic Bacteria F and Web Link 0? Carbon Sink ? ...
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6 Benthic Heterotrophs - Benthic Heteretrephic Micrcbes 1'...

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