DYNAMICS OF CARBON ASSIMILATION BY ST-LAWRENCE ESTUARY PHYTOPLANKTON AT THE END OF SUMMER

被引：4

作者：

DESCOLASGROS, C ^{[1
]}

FONTUGNE, MR ^{[1
]}

机构：

[1] CEA,CNRS,CTR FAIBLES RADIOACT,F-91190 GIF SUR YVETTE,FRANCE

来源：

HYDROBIOLOGIA | 1990年 / 207卷

关键词：

ESTUARY; CARBON; CARBOXYLASES; DELTA-C-13; PRODUCTION; PHYTOPLANKTON;

D O I：

10.1007/BF00041460

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

This study presents data of in situ measurements of inorganic carbon assimilation by phytoplankton communities of the St Lawrence estuary during the end of summer 1982. We used carboxylase activity measurements (ribulose-1, 5-bisphosphate carboxylase, beta-carboxylases) and the C-13/C-12 ratio of phytoplankton organic carbon, expressed as partial-C-13, to study patterns of assimilation. Upper estuary phytoplankton communities showed a smaller turn-over rate in carbon assimilation than lower estuary phytoplankton communities. Carbon assimilation was limited by light intensity in the upper estuary and by CO2 availability in the lower estuary. In the St Lawrence estuary, stable carbon isotope ratios of phytoplankton organic carbon seemed to be controlled by inorganic carbon availability rather than by phytoplankton metabolism.

引用

页码：227 / 232

页数：6

共 26 条

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