Carbon and nitrogen content of transparent exopolymer particles (TEP) in relation to their Alcian Blue adsorption

被引:213
作者
Engel, A
Passow, U
机构
[1] Inst Meereskunde, D-24109 Kiel, Germany
[2] Univ Calif Santa Barbara, Inst Marine Sci, Santa Barbara, CA 93106 USA
关键词
transparent exopolymer particles; TEP; POC; PON; phytoplankton exudation; coagulation; carbon cycling;
D O I
10.3354/meps219001
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The carbon and nitrogen content of transparent exopolymer particles (TEP) was determined and related to the concentration of TEP as quantified by a colorimetrical method. TEP were produced in the laboratory from dissolved precursors by laminar or turbulent shear. Dissolved precursors were obtained by 0.2 mum filtration from diatom cultures, with or without nutrient reduction, and from natural diatom populations. The relationship between carbon and TEP was significant, linear and species-specific. Carbon concentration of TEP derived from this relationship concurred with previous findings, Shortage of silicic acid or nitrate in the culture media had no effect on the carbon content of TER Molar C:N ratios of TEP were above the Redfield ratio, with a mean value of 26. It is suggested that the nitrogen fraction of TEP can be explained by adsorption of dissolved organic nitrogen (DON) onto TEP. Based on the newly established relationship, concentrations of TEP-derived carbon (TEP-C) were calculated for the Baltic Sea, the coastal Pacific, the North East Atlantic and the Northern Adriatic Sea.
引用
收藏
页码:1 / 10
页数:10
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