DYNAMIC-MODELS FOR AMMONIUM INHIBITION OF NITRATE UPTAKE BY PHYTOPLANKTON

被引：35

作者：

PARKER, RA ^{[1
]}

机构：

[1] WASHINGTON STATE UNIV,DEPT ZOOL,PULLMAN,WA 99164

来源：

ECOLOGICAL MODELLING | 1993年 / 66卷 / 1-2期

关键词：

D O I：

10.1016/0304-3800(93)90042-Q

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Two systems of differential equations are proposed to describe the dynamic effects of NH4+ on NO3- uptake. The inhibitory function is of the form 1/(1 + [NH4+]/K4), where K4 is the Michaelis constant for NH4+ uptake. In the first system, concentrations of particulate nitrogen, NO3- and NH4+ are modeled, and NH4+ inhibits NO3- uptake directly. In the second, a pool of cellular reductant is added into which both reduced NO3- and NH4+ flow. Nitrate reductase also is included, and its formation is inhibited by NH4+. In each case, solutions agree well with published observations on a deep-tank culture of Ditylum brightwellii.

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页码：113 / 120

页数：8

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