. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. - Percentage of total ammonium lost from each sediment layer - Percentage of total ammonium lost from the adsorbed pool of each sediment layer equilibrium. Based on the difference in the ammonium concen- tration in the sediment before and after inundation, the release nf ammonium from the sediment over a tidal cycle was calcu- lated to be mmol/irr. That accounts for as much as 37% of the total ammonium in the upper 10-cm sediment layers, of which S(K£ originated from the adsorbed ammonium pool. These values are in accor
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. - Percentage of total ammonium lost from each sediment layer - Percentage of total ammonium lost from the adsorbed pool of each sediment layer equilibrium. Based on the difference in the ammonium concen- tration in the sediment before and after inundation, the release nf ammonium from the sediment over a tidal cycle was calcu- lated to be mmol/irr. That accounts for as much as 37% of the total ammonium in the upper 10-cm sediment layers, of which S(K£ originated from the adsorbed ammonium pool. These values are in accordance with other data for ammonium flushing (I. 2). and indicate that studies examining the loss of ammonium in sediments need to consider the adsorbed pools as well as the dissolved pools. This research was supported by a grant from NOAA Sea Grant. Literature Cited 1. Rocha, C. 1998. Linmol. Oceanogr. 43: 823- S31. 2. Cabrita, M. T., F. Catarino, and C. Vale. 1999. Oceanol. Actu 22: 291-302. 3. Caetano, M., M. Falcao, C. Vale, and M. J. Bebianno. 1997. Mar. Chem. 58: 203-211. 4. Wolaver, T. G., G. J. Whiting, R. F. Dame, T. M. Williams, and J. D. Spurrier. 1988. Mar. Ecol. Prog. Ser. 49: 107-116. 5. Rosenfeld, J. K. 1979. Linmol. Oceanogr. 24: 356-364. 6. Mackin, J. E., and R. C. Aller. 1984. Linmol. Oceanogr. 29: 250- 257. 7. Solorzano. L. 1969. Linmol. Oceanogr. 14: Figure 1. (At Ammonium concentration profiles before and after in- undation. (B) Percentage of total ammonium removed from each sediment layer due to tidal flushing, and percentage of total ammonium lust from the adsorbed ammonium pool. 1C) Kj-profile after 12 h of air 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annua
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