Nitrogen and phosphorus limitation of oceanic microbial growth during spring in the Gulf of Aqaba

0335112 - MBÚ 2010 RIV DE eng J - Journal Article
Suggett, D. J. - Stambler, N. - Prášil, Ondřej - Kolber, Z. - Quigg, A. - Vázquez-Dominguez, E. - Zohary, T. - Berman, T. - Iluz, D. - Levitan, O. - Lawson, T. - Meeder, E. - Lazar, B. - Bar-Zeev, E. - Medová, Hana - Berman-Frank, I.
Nitrogen and phosphorus limitation of oceanic microbial growth during spring in the Gulf of Aqaba.
Aquatic Microbial Ecology. Roč. 56, 2-3 (2009), s. 227-239. ISSN 0948-3055. E-ISSN 1616-1564
Institutional research plan: CEZ:AV0Z50200510
Keywords : Phytoplankton * Aerobic anoxygenic photoheterotroph * Bacterial
Subject RIV: EE - Microbiology, Virology
Impact factor: 1.743, year: 2009

Bioassay experiments were performed to identify how growth of key groups within the microbial community was simultaneously limited by nutrient (nitrogen and phosphorus) availability during spring in the Gulf of Aqaba’s oceanic waters. Measurements of chlorophyll a (chl a) concentration and fast repetition rate (FRR) fluorescence generally demonstrated that growth of obligate phototrophic phytoplankton was co-limited by N and P and growth of facultative aerobic anoxygenic photoheterotropic (AAP) bacteria was limited by N. Phytoplankton exhibited an increase in chl a biomass over 24 to 48 h upon relief of nutrient limitation. This response coincided with an increase in photosystem II (PSII) photochemical efficiency (Fv/Fm), but was preceded (within 24 h) by a decrease in effective absorption crosssection (PSII) and electron turnover time
Permanent Link: http://hdl.handle.net/11104/0179678