100
D. A. MCGILL:
Table 6. Distribution of phosphorus fractions (.ug-at 1- 1 ) in the eastern Indian Ocean (Adapted from
data of RAo and RAo, 1968)
Nicobar
Andaman
Cost of
Northern
Sea
Sea
Burma
Bay of Bengal
Total phosphorus
Surface to 50 m
n
12
10
13
21
Range
0.35-1.38
0.43-0.80
0.68-2.10
0.90-1.52
Mean
0.985
0.59
1.12
1.23
50 to 200 m
n
9
2
3
11
Range
1.61-3.33
0.61-2.76
1.52-2.64
Mean
2.14
1.945
1.74
2.06
200 to 500 m
n
7
2
2
13
Range
2.48-2.91
3.90-5.40
2.64-4.60
Mean
2.62
2.72
4.65
3.09
500 to 1000 m
n
4
1
2
11
Range
2.59-2.71
2.86-3.20
Mean
2.67
2.70
3.01
2.97
1000 to 2000 m
n
7
Range
2.62-3.15
Mean
2.90
Over2000m
n
7
Range
2.41- 3.15
Mean
2.79
Inorganic phosphate
Surface to 50 m
n
11
10
13
19
Range
0-0.30
0-0.08
0-0.90
0.02-0.44
Mean
0.06
0.03
0.25
0.105
50 to 200 m
n
9
2
3
11
Range
0.09-2.19
0.55 -1.81
0.21-1.72
Mean
1.06
1.59
1.10
1.15
200 to 500 m
n
7
2
2
13
Range
2.23-2.55
2.51-2.91
Mean
2.41
2.525
2.62
2.73
500 to 1000 m
n
4
1
2
11
Range
2.65-2.73
2.76-3.22
Mean
2.69
2.69
2.91
2.93
1000 to 2000 m
n
7
Range
2.61-3.19
Mean
2.92
Over 2000m
n
7
Range
2.40-3.08
Mean
2.68
Dissolved organic P
Surface to 50 m
n
11
10
13
19
Range
0.22-1.23
0.36-0.75
0.50-1.11
0.64-1.63
Mean
0.86
0.51
0.81
1.06
50 to 200 m
n
9
2
3
11
Range
0.28-2.85
0.09-0.49
0.86-0.96
0.39-1.87
Mean
0.93
0.29
0.90
0.98