Influence of nitrogen enrichment on size-fractionated in vitro carboxylase activities of phytoplankton from Thau Lagoon (Coastal Mediterranean Lagoon, France)

被引：8
|
作者：
Fouilland, E
Descolas-Gros, C
Collos, Y
Vaquer, A
Souchu, P
Gasc, A
Bibent, B
Pons, V
机构：
[1] Univ Montpellier 2, Lab Hydrobiol Marine & Continentale, UMR 5556, F-34095 Montpellier 05, France
[2] IFREMER, Lab Ecol, F-34200 Sete, France
来源：
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY | 2002年 / 275卷 / 02期
关键词：
carboxylase activities; size-fractionated phytoplankton; nitrogen enrichments; autotrophy; heterotrophy;
D O I：
10.1016/S0022-0981(02)00235-6
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
The influence of dissolved inorganic and organic nitrogen (DIN and DON) enrichments on pools of enzymes responsible for CO2 fixation by the Calvin-Benson (Rubisco) and beta-carboxylation pathways (beta-carboxylases) were studied in a natural plankton assemblage. The plankton community from a coastal Mediterranean lagoon were incubated in situ for 24 h with initially ammonium, nitrate and DON (taurine) enrichments and compared to a control without any enrichment. An increase of small picophytoplankton and diatom biomass was observed in the enriched inorganic nitrogen treatments 7 - 10 h after the initial enrichment. Phytoplankton biomass decreased in the control and under taurine enrichment suggesting an inorganic nitrogen limitation of phytoplankton growth.
引用
收藏
页码：147 / 171
页数：25
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