. The Biological bulletin. Biology; Zoology; Marine biology. LOCATION 22 Q I I Ir I Ir I J I. I» I I tI tI tI tI ' ' -. -LEGEND- MICROGRAM-ATOMS PER LITER NITRITE D .i8 NITRATE 1 â I5 LOCATION 3 Fig. 5. Seasonal variation of nitrite and nitrate. Locations 3 and 22, Gulf of Maine. Ordinates, depths in meters. Relation of Nitrite to Other Factors Nitrate and Phosphate Since nitrite participates in the metabolic cycle with the other " nutri- ent salts," it would seem important to compare its variations and be- havior with that of the other nutrients, nitrate and phosphate. Figures 9 an
. The Biological bulletin. Biology; Zoology; Marine biology. LOCATION 22 Q I I Ir I Ir I J I. I» I I tI tI tI tI ' ' -. -LEGEND- MICROGRAM-ATOMS PER LITER NITRITE D .i8 NITRATE 1 â I5 LOCATION 3 Fig. 5. Seasonal variation of nitrite and nitrate. Locations 3 and 22, Gulf of Maine. Ordinates, depths in meters. Relation of Nitrite to Other Factors Nitrate and Phosphate Since nitrite participates in the metabolic cycle with the other " nutri- ent salts," it would seem important to compare its variations and be- havior with that of the other nutrients, nitrate and phosphate. Figures 9 and 10 show these relations at a number of stations in the Gulf of Maine at various times of the year. Certain conclusions are evident: 1. High nitrite concentrations in the upper water levels are associated with high concentrations of nitrate and phosphate. The converse is not always true, especially at certain times of the year. During the winter, when the surface is being replenished with nutrients by overturn of the water mass, nitrite is also in evidence, particularly as the season ad- vances. In January, the production of nitrite is at a minimum, and since this corresponds to the time of greatest instability of the water mass it occasionally happens that little or no nitrite is found at any level,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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