Environmental Monitoring and Assessment

, Volume 81, Issue 1–3, pp 207–219 | Cite as

Production, Respiration and Net Ecosystem Metabolism in U.S. Estuaries

  • Jane M. Caffrey


Primary production, respiration, and net ecosystem metabolism (NEM) are useful indicators of ecosystem level trophic conditions within estuaries. In this study, dissolved oxygen data collected every half hour between January 1996 to December 1998 by the National Estuarine Research Reserve System Wide Monitoring Program were used to calculate primary production, respiration, and net ecosystem metabolism. Data from two sites at each of 14 Reserves were analyzed. On average, three quarters of the data available could be used to calculate metabolic rates. Data from two of the Reserves were used to evaluate the assumption of homogeneity of water masses moving past the oxygen sensor. Temperature was the single most important factor controlling metabolic rates at individual sites, although salinity was also important at about half the sites. On an annual basis, respiration exceeded gross primary production demonstrating that all but 4 of the 28 sites were heterotrophic.

estuary production respiration net ecosystem metabolism dissolved oxygen 


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  1. Copeland, B.J. and Duffer, W.R.: 1964, ‘Use of a Clear Plastic Dome to Measure Gaseous Diffusion Rates in Natural Waters’, Limnology and Oceanography, 9, 494–499.Google Scholar
  2. D'Avanzo, C., Kremer, J.N. and Wainright, S.C.: 1996, ‘Ecosystem Production And Respiration In Response To Eutrophication In Shallow Temperate Estuaries’, Marine Ecology Progress Series, 141, 263–274.Google Scholar
  3. Hartman, B. and Hammond, D.E.: 1984, ‘Gas Exchange Rates Across the Sediment Water and Air-Water Interfaces in South San Francisco Bay’, Journal of Geophysical Research, 89, 3593–3603.Google Scholar
  4. Kemp, W.M. and Boynton, W.R: 1980, ‘Influence of Biological and Physical Processes on Dissolved Oxygen Dynamics in an Estuarine System: Implications for Measurement of Community Metabolism’, Estuarine, Coastal and Marine Science, 11, 407–431.Google Scholar
  5. Kemp, W.M., Smith, E.M., Marvin-Dipasquale, M., and Boynton, W.R.: 1997, ‘Organic Carbon Balance and Net Ecosystem Metabolism in Chesapeake Bay’, Marine Ecology Progress Series, 150, 229–248.Google Scholar
  6. Marino, R. and Howarth, R.W.: 1993, ‘Atmospheric Oxygen Exchange in the Hudson River: Dome Measurements and Comparison with Other Natural Waters’, Estuaries, 16, 433–445.Google Scholar
  7. Nixon, S.W. and Oviatt, C.A.: 1972, ‘Preliminary Measurements of Midsummer Metabolism in Beds of Eelgrass, Zostera marina’, Ecology, 53, 150–153.Google Scholar
  8. Odum, H.T.: 1956, ‘Primary Production in Flowing Waters’, Limnology And Oceanography, 1, 102–117.Google Scholar
  9. Odum, H.T. and Hoskins, C.M.: 1958, ‘Comparative Studies on the Metabolism of Marine Waters’, Publications of the Institute of Marine Science, Texas 5, 16–46.Google Scholar
  10. Oviatt, C.A., Keller, A.A., Sampou, P.A., and Beatty, L.L.: 1986, ‘Patterns of Productivity During Eutrophication: a Mesocosm Experiment’, Marine Ecology Progress Series, 28, 69–80.Google Scholar
  11. Smith, S.V. And Hollibaugh, J.T.: 1997, ‘Annual Cycle and Interannual Variability of Ecosystem Metabolism in a Temperate Climate Embayment’, Ecological Monographs, 67, 509–533.Google Scholar
  12. Swaney, D.P., Howarth, R.W. and Butler, T.J.: 1999, ‘A Novel Approach for Estimating Ecosystem Production and Respiration in Estuaries: Application to the Oligohaline and Mesohaline Hudson River’, Limnology and Oceanography, 44, 1509–1521.Google Scholar
  13. Wenner, E.L., Holland, A.F., Arendt, M.D., Edwards, D. And Caffrey, J.M.: 2001, ‘A Synthesis of Water Quality Data from the National Estuarine Research Reserve System-Wide Monitoring Program’, Report to NOAA Estuarine Reserve Division.Google Scholar

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Jane M. Caffrey
    • 1
  1. 1.Center for Environmental Diagnostics and BioremediationUniversity of West FloridaPensacolaUSA

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