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Periodic bacterivore activity balances bacterial-growth in the marine-environment
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet). (Johan Wikner ; UMFpub)
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
1990 (engelsk)Inngår i: Limnology and Oceanography, ISSN 0024-3590, E-ISSN 1939-5590, Vol. 35, nr 2, s. 313-324Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The grazing rate of pelagic bacteria was repeatedly determined during 36-h time-course experiments with the minicell recapture technique. Die1 variation in the rate of grazing occurred in all water masses investigated. Maximal rates reached 2 x lo5 cells ml-’ h-r, whereas minimal values were 20 times lower. Highest grazing rates were found during the day in most cases, but grazing could also dominate at night as found in one study. Die1 periodicity was mainly due to variation in the per-cell feeding rate of bacterivorous flagellates. Accumulation of the bacterial biomass into the l-3-pm size fraction was positively correlated with changes in bacterial grazing. The transfer efficiency to organisms z 10 pm was low. On average, the daily grazing rate equaled 60% of the bacterial standing stock, exceeding bacterial growth by a factor of 2.6, as estimated from [3H]thymidine incorporation.

sted, utgiver, år, opplag, sider
American Society of Limnology and Oceanography, 1990. Vol. 35, nr 2, s. 313-324
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-52559ISI: A1990DR94700006OAI: oai:DiVA.org:umu-52559DiVA, id: diva2:506369
Tilgjengelig fra: 2012-02-28 Laget: 2012-02-24 Sist oppdatert: 2018-06-08
Inngår i avhandling
1. Predation on marine pelagic bacteria: On the in situ rates, regulation and dynamics of bacterivory studied with a molecular genetic technique
Åpne denne publikasjonen i ny fane eller vindu >>Predation on marine pelagic bacteria: On the in situ rates, regulation and dynamics of bacterivory studied with a molecular genetic technique
1989 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Umeå: Umeå universitet, 1989. s. 58
Emneord
Marine, grazing, minicells, molecular genetics, method, predation rate, dynamics, bacterivore, predator-prey
HSV kategori
Forskningsprogram
mikrobiologi
Identifikatorer
urn:nbn:se:umu:diva-52569 (URN)91-7174-418-5 (ISBN)
Disputas
1989-05-26, Institutionen för Mikrobiologi, Föreläsningssalen, Umeå Universitet 901 87, Umeå, 09:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2012-03-05 Laget: 2012-02-24 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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