for regions such as Long Island Sound (Riley and 

 Conover, 1956) and New England coastal surface 

 waters (Ketchum et al. 1958). - 



The ^jSi : AF ratios in table I are more variable 

 from section to section. The liighest ratio occurs 

 in the Baffin Bay waters of section H, where sili- 

 cate accumulates below sill depth. The value 

 found agrees with our previous observations (Cor- 

 win and McGill, 1965). By contrast, a low value 

 is obtained for section F. Without biomass 

 measurements or productivity estimates, this varia- 

 tion in the coastal sections cannot be correlated 

 with any changes in populations, thougli this is one 

 obvious agent affecting \Si:i^P through growth 

 of phytoplankton skeletons and other metabolic 

 changes. Land drainage might augment the local 

 supplies, as in section E where the ASi: aP ratio is 

 slightly increased, but this effect likewise cannot 

 be estimated from available information. 



The AS! : Af and AN : aP ratios do not vary con- 

 sistently together, which adds to the difficulty of 

 interpretation. In data of previous years for the 

 section from South Wolf Island to Cape Farewell, 

 Greenland, which includes the deep water offshore, 

 the AS I -.aN-.aP has been in good agreement with 

 the theoretical ratio of change in sea water (see Mc- 

 Gill and Corwin, 1965). It is probable that bio- 

 logical assimilation in the surface waters near 

 shore acts as a differential agent to alter the ratios 

 selectively, while process of regeneration in deep 

 water of the main Labrador Sea restore the nutri- 

 ent quantities to solution. In the coastal sections 

 surveyed in 1965 assimilative processes predomi- 

 nate, thus producing the variable ratios given in 

 table I. 



TABLE I. Relative changes in concentration among 

 the nutrient elements in coastal sections near Labra- 

 dor and Baffin Island 



Area 



Section : 



G-_ 

 F.. 

 E._ 

 D.. 

 D'_ 

 C._ 

 B_. 



ASi 



23. 82 ±3. 



13. 39 ±2. 



9. 27±0. 



16. 89±3. 



10. 15 ±3. 



11. 18±0. 

 11. 88±0. 

 10. 87± 1. 

 13. 01±1. 



42 ( 87) 

 40 ( 58) 

 80( 50) 

 53( 26) 

 05 ( 82) 

 87 ( 52) 

 93(160) 

 40( 95) 

 17(106) 



AN 



16. 40± 

 15. 02± 



17. 62± 

 15. 95± 

 15. 57± 



9. 45 ± 



18. 14± 

 18. 10± 

 17. 31 ± 



3. 16( 87) 

 3. 64 ( 58) 



1. 87 ( 50) 

 7. 21( 25) 



2. 88 ( 82) 

 1. 75 ( 52) 



1. 76(159) 



2. 99( 95) 

 1. 89(106) 



AP 



Organic phosphorus distribution is i)erhaps 

 best, represented as a frequency distribution. The 

 statistical parameters resulting from such treat- 

 ment are given in table II. The mean value given 

 includes observations from all depths on the sec- 



TABLE 11. Distribution of total organic phosphorus 

 for coastal sections near Labrador and Baffin Island, 

 arranged as a frequency distribution and with 95 

 percent confidence interval calculated for the mean in 

 each section 



Note— The number of data pairs used in the regression is given in paren- 

 theses. Nnety-five percent confidence intervals arc calculated from Simpson 

 el al.. 1960. 



Section I 



9493-9500 



Section G — 

 9477-9485 



Section F — 

 9464-9471 



Section E 



9471-9474 



Section D 



9448-9458 



Mouth of Hudson 

 Strait 



Section D' 



9459-9463 

 ITnOava Bay 



Section C — 

 9435-9448 



Section B — 

 9422-9432 



Section A 



9409-9420 



s 



n 



s/V"- 



sj^fri- 



sl-^- 



s' 



n 



X 



.e2 



S 



s|^|n. 



n 



X 



s' 



s 



slyfn- 



n 



X 



sK... 

 s 



s/V"- 



« 



s/V"- 



Frequency 



distribu- 

 tion values 



g."! percent 



corifldence 



interval 



58 



1716 

 0393 

 1982 

 0260 

 86 

 1645 

 ,0362 

 , 1903 

 .0205 

 50 

 . 1210 

 .0147 

 . 1211 

 .0171 

 26 

 . 1231 

 .0346 

 . 1856 

 .0365 

 83 

 . 1560 

 .0243 

 . 1560 

 .0171 

 42 

 . 1667 

 .0331 

 . 1820 

 .0281 

 158 

 . 1845 

 . 0428 

 . 2069 

 .0165 

 92 

 . 1707 

 .0306 

 . 1749 

 .0182 

 106 

 . 1637 

 . 0292 

 . 1709 

 . 0166 



± 0. 0533 



±. 0408 



± . 0346 



±.0753 



±. 0340 



±. 0568 



± . 0323 



± . 0362 



± . 0330 



37 



