TABLE IV. HALF-SATWATION CONSTANTS FOB
(K:) OF NITRATE AND AMMONIUM IONS BY ~ I N E
PHYTOPLANKTON
SPECIES IN C a m r AT 18°C (Data from Eppley e t d . , 1969b) AND BY NATUE~AL POPULATIONS (Data from MacIassc and
Dugdale, 1969).
Units of K," are pmolesll. Where only one value is given, data from two experiments were combined.
Organim
Oceanic species
Coccolithwr huxleyi"
C . huxleyib
Chaetoceroa gracile
Cyclotella nana
Skeletonema coelatum
Leptocylindrua danicw Cleve
Rhizocrolenia atolterfothii H. Peragallo
R. robwrta Pritchard
Ditylum brightwellii
Coacinodiscw lineatw Ehrenberg
C . wailesii Gran & Angst
Aaterionello j a p o n k
Neritic or littoral flagellates
Qonyauhx polyedra
Gymnodinium aplendena Lebour
Monoch y a i a lutheri
Isochryaia gdbana
Dunaliella tertwlecda
Oligotrophic
Eutrophic
Neritic diatoms
Natural marine communities
Nitrate
Ammonium
Cell
diameter
K:
f 95y' O
Ii:
i 95%
conf. limit
conf. limit
( P )
0.1
0.3
0.1
0.7
5
0.1
1.6
0.2
0.9
5
0.3, 0.1
0.5, 0.2
0.5, 0-3
0-5, 0-3
5
0.3, 0.7
0.4, 0.5
0-4
0.3
5
0.5, 0.4
0.4, 0-1
1.3, 1-2
0.5, 0.1
1-7
0.4
3.5, 2.5
1.0, 1-0
0.6
1.7
2.4, 2.8
0.5, 0-6
2.1, 5-1
0-3, 1.8
0.7, 1.3
0.3, 0.5
3.6, 0.8. 0.8
3.4, 0.9, 0.5
0.5, 0.5
0.9, 0.4
5.6, 9.3
2.0, 1.5
1.1
0.6
2.8, 1.2
2.6. 1.0
4.3, 5.5
5.4, 2.0
1.5, 0.6
1.2, 0.8
0.8, 0.7, 0-5
1.4, 0.2, 0-4
8
21
20
85
30
50
210
10
8.6, 10.3
- 2.4
5.7, 5.3
0.6, 1.1
45
3-8
0.9
1.1
1.0
47
0.6
0.3
0.5
0.4
5
5
0.1, 0.1
0.2, 0.2
-
I
1.4
1-1
0- 1
0-6
8
0.2 (G expts)
1.0 (3 expts)
0.1-0-6 (3 expts)
1.3
(1 expt)
a Sargaaso Sea isolate
D Oslo Fjord ioolate