. The Biological bulletin. Biology; Zoology; Marine biology. 140 NORRIS W. RAKESTRAW The stations on the continental shelf, shown in Tables III and IV, and in Fig. 3, present a fairly regular picture. Since these were all sampled during the summer months, nitrite was seldom found at the surface in more than small traces, while significant amounts were en- countered below 30 meters, or near the bottom, if shallower than that. Surface conditions off New York Harbor were somewhat exceptional. Lines A and D, to the edge of the shelf, bring out the fact that the rate of nitrification on the bottom,
. The Biological bulletin. Biology; Zoology; Marine biology. 140 NORRIS W. RAKESTRAW The stations on the continental shelf, shown in Tables III and IV, and in Fig. 3, present a fairly regular picture. Since these were all sampled during the summer months, nitrite was seldom found at the surface in more than small traces, while significant amounts were en- countered below 30 meters, or near the bottom, if shallower than that. Surface conditions off New York Harbor were somewhat exceptional. Lines A and D, to the edge of the shelf, bring out the fact that the rate of nitrification on the bottom, as indicated by nitrite concentration there, is apparently greatest at depths of 50 to 75 meters. The number-. 16*3 Fig. 3. Location of stations in the Gulf of Maine and vicinity. ing of stations on these lines (A-5, A-39, D-20, etc.) indicates the number of miles off-shore, in each case. An unfortunate spacing of the sampling levels at the deeper stations on these lines, as well as else- where on the shelf, failed to reveal the zone of maximum nitrite gener- ally found at such stations between 30 and 50 meters, and which prob- ably existed here also. At the deepest stations, along the edge of the shelf (1725, 1684, 2143 and 2156), this maximum zone is clearly seen. Its depth varies considerably, showing the influence of the adjacent oceanic water, in which the maximum zone is invariably deeper than at stations on the 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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