Denitrification and the Stoichiometry of Nutrient Regeneration in Waquoit Bay, Massachusetts: Supplementary Figures

The figure legends below are linked to figures discussed in our paper that appeared in Estuaries (25: 272-281).

Supplementary Figure 1. Comparison of benthic DIC release and O₂ uptake for a variety of estuarine and coastal systems.  Annual averages or integrated rates are shown.  Symbols refer to literature sources (below).  Line represents a model I regression.

Supplementary Figure 2. Comparison of benthic DON flux to DIN efflux for a variety of estuarine, shelf and coastal systems.  Annual integrated rates or averages are presented for temperate systems. Symbols refer to literature sources of data (below). Top) DON flux / DIN flux versus DIN release.  Negative values indicate benthic uptake. The power equation which yielded the plot is given. Bottom) DON flux as a fraction of total dissolved nitrogen (TDN) flux versus DIN efflux.  TDN was calculated as DON plus DIN (nutrient flux only, N₂ and N₂O flux are not included).

Data Sources

1.             Berelson, W. M., D. Heggie, A. Longmore, T. Kilgore, G. Nicholson, and G. Skyring. 1998. Benthic nutrient recycling in Port Phillip Bay, Australia. Estuarine Coastal and Shelf Science. 46:917-934.

2.             Bertuzzi, A., J. Faganeli, C. Welker, and A. Brambati. 1997. Benthic fluxes of dissolved inorganic carbon, nutrients and oxygen in the Gulf of Trieste (northern Adriatic). Water Air and Soil Pollution. 99:305-314.

3.             Blackburn, T. H., P. O. J. Hall, S. Hulth, and A. Landen. 1996. Organic-N loss by efflux and burial associated with a low efflux of inorganic N and with nitrate assimilation in Arctic sediments (Svalbard, Norway). Marine Ecology-Progress Series. 141:283-293.

4.             Burdige, D. J., and S. L. Zheng. 1998. The biogeochemical cycling of dissolved organic nitrogen in estuarine sediments. Limnology and Oceanography. 43:1796-1813.

5.             Cermelj, B., A. Bertuzzi, and J. Faganeli. 1997. Modelling of pore water nutrient distribution and benthic fluxes in shallow coastal waters (Gulf of Trieste, Northern Adriatic). Water Air and Soil Pollution. 99:435-443.

6.             D'avanzo, C., and J. N. Kremer. 1994. Diel oxygen dynamics and anoxic events in an eutrophic estuary of Waquoit Bay, Massachusetts. Estuaries. 17:131-139.

7.             Devol, A. H. 1991. Direct measurement of nitrogen gas fluxes from continental shelf sediments. Nature. 349:319-321.

8.             Dollar, S. J., S. V. Smith, S. M. Vink, S. Obrebski, and J. T. Hollibaugh. 1991. Annual cycle of benthic nutrient fluxes in Tomales Bay, California, and contribution of the benthos to total ecosystem metabolism. Marine Ecology-Progress Series. 79:115-125.

9.             Enoksson, V. 1993. Nutrient recycling by coastal sediments: effects of added algal material. Marine Ecology-Progress Series. 92:245-254.

10.           Giblin, A. E., C. S. Hopkinson, and J. Tucker. 1997. Benthic metabolism and nutrient cycling in Boston Harbor, Massachusetts. Estuaries. 20:346-364.

11.           Hammond, D. E., C. Fuller, D. Harmon, B. Hartman, M. Korosec, L. G. Miller, R. Rea, S. Warren, W. Berelson, and S. W. Hager. 1985. Benthic fluxes in San Francisco Bay. Hydrobiologia. 129:69-90.

12.           Hargrave, B. T., and G. A. Phillips. 1981. Annual in situ carbon-dioxide and oxygen flux across a subtidal marine sediment. Estuarine Coastal and Shelf Science. 12:725-737.

13.           Hopkinson, C. S., A. E. Giblin, J. Tucker, and R. H. Garritt. 1999. Benthic metabolism and nutrient cycling along an estuarine salinity gradient. Estuaries. 22:863-881.

14.           LaMontagne, M. G., and I. Valiela. 1995. Denitrification measured by a direct N₂  flux method in sediments of Waquoit Bay, MA. Biogeochemistry. 31:63-83.

15.           Lomstein, B. A., A.-G. U. Jensen, J. W. Hansen, J. B. Andreasen, L. S. Hansen, J. Berntsen, and H. Kunzendorf. 1998. Budgets of sediment nitrogen and carbon cycling in the shallow water of Knebel Vig, Denmark. Aquatic Microbial Ecology. 14:69-80.

16.           Nowicki, B. L. 1994. The effect of temperature, oxygen, salinity, and nutrient enrichment on estuarine denitrification rates measured with a modified nitrogen gas flux technique. Estuarine Coastal and Shelf Science. 38:137-156.

17.           Sayama, M. 1999. DON flux and metabolism at sediment-water interface in a coastal marine environment. American Society of Limnology and Oceanography Annual Meeting, Santa Fe, NM.

18.           Teague, K. G., C. J. Madden, and J. W. Day. 1988. Sediment-water oxygen and nutrient fluxes in a river-dominated estuary. Estuaries. 11:1-9.

19.           Therkildsen, M. S., and B. A. Lomstein. 1993. Seasonal variation in net benthic C-mineralization in a shallow estuary. FEMS Microbiology Ecology. 12:131-142.

20.           Trimmer, M., D. B. Nedwell, D. B. Sivyer, and S. J. Malcolm. 1998. Nitrogen fluxes through the lower estuary of the river Great Ouse, England: the role of the bottom sediments. Marine Ecology-Progress Series. 163:109-124.

21.           Tyler, A. C., K. C. McGlathery, and I. C. Anderson 1999. The influence of micro- and macroalgae on DON fluxes in a shallow coastal lagoon. American Society of Limnology and Oceanography Annual Meeting, Santa Fe, NM.

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