"Iron is needed by most living organisms in larger quantities than any other element apart form the structural atoms carbon, oxygen, hydrogen, nitrogen, and phosphorus," (Horne and Goldman, 1994). It exists as one of the most common metals found in the earth's crust. Used in hemoglobin for its affinity towards oxygen, iron is a vital requirement to all living systems which use oxygen for life. Iron also is a key element in enzymes responsible for nitrogen fixation and denitirification.
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Depth (in meters) |
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June 6, 1998 |
0.19 |
0.41 |
0.48 (at 2 meters) |
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June 13, 1998 |
0.29 |
0.41 |
2.42 (at 2 meters) |
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June 20, 1998 |
0.39 |
0.42 |
0.63 |
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June 26, 1998 |
0.44 |
0.50 |
0.55 |
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July 2, 1998 |
0.41 |
0.41 |
0.51 |
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July 10, 1998 |
0.38 |
0.42 |
0.62 |
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July 21, 1998 |
0.39 |
0.44 |
0.73 |
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July 28, 1998 |
0.40 |
0.40 |
0.60 |
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August 8, 1998 |
0.45 |
0.54 |
N / A |
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August 25, 1998 |
0.34 |
0.38 |
0.56 |
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