FORMATION OF BLOOMS BY THE SYMBIOTIC CILIATE MESODINIUM-RUBRUM - THE SIGNIFICANCE OF NITROGEN UPTAKE

被引:54
作者
WILKERSON, FP
GRUNSEICH, G
机构
[1] Department of Biological Sciences, University of Southern California, Los Angeles
[2] E.Morriches, NY 11940, Adelaide Ave
关键词
D O I
10.1093/plankt/12.5.973
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Mesodinium rubrum, a holotrichous ciliate that harbors endosymbiotic chloroplasts, was responsible for patches of red water in the coastal upweUing ecosystem at 15°S, Peru during March-May 1977. Stations within red patches showed elevated concentrations of paniculate nitrogen, chlorophyll a and dissolved organic nitrogen (DON), and lower concentrations of nitrate compared with areas where there were no ciliate blooms. These naturally occurring populations of M.rubrum took up nitrate, ammonium and DON. Light was required for nitrate uptake and to a lesser extent for ammonium uptake. Dark uptake of ammonium occurred in all experiments. There was no effect of light on DON uptake. Possession of endosymbiotic chloroplasts enables this protozoan to use upwelled nitrate efficiently for development of large blooms and concentrate into patches in the face of relatively strong advective regimes. © 1990 Oxford University Press.
引用
收藏
页码:973 / 989
页数:17
相关论文
共 55 条
[11]   BIOCHEMICAL INDICATORS OF N UTILIZATION BY PHYTOPLANKTON DURING UPWELLING OFF THE WASHINGTON COAST [J].
DORTCH, Q ;
POSTEL, JR .
LIMNOLOGY AND OCEANOGRAPHY, 1989, 34 (04) :758-773
[12]   THE USE OF N-15 TO MEASURE NITROGEN UPTAKE IN EUTROPHIC OCEANS - EXPERIMENTAL CONSIDERATIONS [J].
DUGDALE, RC ;
WILKERSON, FP .
LIMNOLOGY AND OCEANOGRAPHY, 1986, 31 (04) :673-689
[13]   UPTAKE OF NEW AND REGENERATED FORMS OF NITROGEN IN PRIMARY PRODUCTIVITY [J].
DUGDALE, RC ;
GOERING, JJ .
LIMNOLOGY AND OCEANOGRAPHY, 1967, 12 (02) :196-&
[14]  
DUGDALE RC, 1981, CAN B FISH AQUAT SCI, V210, P234
[15]  
DUGDALE RC, 1987, P INT S EQUATORIAL V, P103
[16]  
DUGDALE RC, 1977, SEA, V6, P789
[17]   AMMONIUM DISTRIBUTION IN SOUTHERN-CALIFORNIA COASTAL WATERS AND ITS ROLE IN THE GROWTH OF PHYTOPLANKTON [J].
EPPLEY, RW ;
RENGER, EH ;
HARRISON, WG ;
CULLEN, JJ .
LIMNOLOGY AND OCEANOGRAPHY, 1979, 24 (03) :495-509
[18]  
FENCHEL T, 1968, Ophelia, V5, P245
[19]  
GRUNSEICH GS, 1980, CUEA44 TECH REP
[20]  
HAMBURGER C, 1911, NORD PLANKT, V15, P1