Abstract
Multi-year nitrogen (N) and phosphorus (P) budgets were developed for the Patuxent River estuary, a seasonally stratified and moderately eutrophic tributary of Chesapeake Bay. Major inputs (point, diffuse, septic, and direct atmospheric) were measured for 13 years during which, large reductions in P and then lesser reductions in N-loading occurred due to wastewater treatment plant improvements. Internal nutrient losses (denitrification and long-term burial of particulate N and P) were measured in tidal marshes and sub-tidal sediments throughout the estuary as were nutrient storage in the water column, sediments, and biota. Nutrient transport between the oligohaline and mesohaline zones and between the Patuxent and Chesapeake Bay was estimated using a salt and water balance model. Several major nutrient recycling terms were directly and indirectly evaluated and compared to new N and P inputs on seasonal and annual time-scales. Major findings included: (1) average terrestrial and atmospheric inputs of N and P were very close to the sum of internal losses plus export, suggesting that dominant processes are captured in these budgets; (2) both N and P export were a small fraction (13% and 28%, respectively) of inputs, about half of that expected for N based on water residence times, and almost all exported N and P were in organic forms; (3) the tidal marsh-oligohaline estuary, which by area comprised ~27% of the full estuarine system, removed about 46% and 74% of total annual upland N and P inputs, respectively; (4) recycled N and P were much larger sources of inorganic nutrients than new inputs during warm seasons and were similar in magnitude even during cold seasons; (5) there was clear evidence that major estuarine processes responded rapidly to inter-annual nutrient input variations; (6) historical nutrient input data and nutrient budget data from drought periods indicated that diffuse nutrient sources were dominant and that N loads need to be reduced by about 50% to restore water quality conditions to pre-eutrophic levels.
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Academy of Natural Sciences of Philadelphia (ANSP). 1965–1975. Patuxent River, Maryland stream survey reports. ANSP. Pennsylvania: Philadelphia.
Barnes, J., F. Rohland, and W. Boynton. 2004. Water quality monitoring program for the sub-estuary comprised of Mill Creek, St. Johns Creek, Back Creek, The Narrows and Solomons Harbor located in Southern Calvert County, Maryland. Technical Report Series No. TS-438-04-CBL. University of Maryland Center for Environmental Science, Solomons, MD.
Basta, D.J., M.A. Warren, T.R. Goodspeed, C.M. Blackwell, T.J. Culliton, J.J. McDonough III, M.J. Katz, D.G. Remer, J.P. Tolson, C.J. Klein, S.P. Orlando Jr, and D.M. Lott. 1990. Estuaries of the United States: vital statistics of a national resource base. A Special NOAA 20th Anniversary Report. NOAA, Rockville, MD.
Boynton, W.R., and W.M. Kemp. 1985. Nutrient regeneration and oxygen consumption by sediments along an estuarine salinity gradient. Marine Ecology Progress Series 23: 45–55.
Boynton, W.R., and F.M. Rohland (eds). 1998. Ecosystem process component. Maryland Chesapeake Bay Water Quality Monitoring Program. Maryland Department of Natural Resources. Level One, Report No. 15. Annapolis, MD. 217.
Boynton, W.R., and W.M. Kemp. 2000. Influence of river flow and nutrient loads on selected ecosystem processes: a synthesis of Chesapeake Bay data. In Estuarine science: a synthetic approach to research and practice, ed. J. Hobbie, 269–298. Washington, DC: Island.
Boynton, W.R., and F.M. Rohland (eds). 2001. Ecosystem process component. Maryland Chesapeake Bay Water Quality Monitoring Program. Maryland Department of Natural Resources. Level One, Report No. 18. Annapolis, MD.
Boynton, W.R., W.M. Kemp, C. Osborne, E. Spaulding, C.W. Keefe, and K.V. Wood. 1982a. Benthic respiration and nutrient fluxes in the vicinity of the chalk point electrical generating system. Final Report, Maryland Department of Natural Resources Power Plant Siting Program. Annapolis, MD.
Boynton, W.R., W.M. Kemp, and C.W. Keefe. 1982b. A comparative analysis of nutrients and other factors influencing estuarine phytoplankton production. In Estuarine Comparisons, ed. V.S. Kennedy, 69–90. New York: Academic.
Boynton, W.R., J.H. Garber, R. Summers, and W.M. Kemp. 1995. Inputs, transformations, and transport of nitrogen and phosphorus in Chesapeake Bay and selected tributaries. Estuaries 18: 285–314.
Boynton, W.R., J.D. Hagy, L. Murray, C. Stokes, and W.M. Kemp. 1996. A comparative analysis of eutrophication patterns in a temperate coastal lagoon. Estuaries 192B: 408–421.
Boynton, W.R., N.H. Burger, R.M. Stankelis, F.M. Rohland, J.D. Hagy III, J.M. Frank, L.L. Matteson, and M.M. Weir. 1998. An environmental evaluation of Back River with selected data from Patapsco River. Ref. No. [UMCES]CBL 98-112b. Chesapeake Biological Laboratory, Solomons, MD, 90.
Bricker, S.B., and J.C. Stevenson. 1996. Nutrients in coastal waters: a chronology and synopsis of research. Estuaries 19: 337–341.
Bricker, S.B., C.G. Clement, D.E. Pirhalla, S.P. Orlando, and D.R.G. Farrow. 1999. National Estuarine eutrophication assessment: effects of nutrient enrichment in the nation’s estuaries. NOAA, National Ocean Service, Special Projects Office and the National Centers for Coastal Ocean Science. Silver Spring, MD, 71.
Castro, M.S., C.T. Driscoll, T.E. Jordan, W.G. Reay, and W.R. Boynton. 2003. Sources of nitrogen to estuaries in the United States. Estuaries 263: 803–814.
Cerco, C., and T. Cole. 1992. Application of the Three-dimensional eutrophication model CE-QUAL-ICM to Chesapeake Bay. Draft Technical Report. U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS.
Chesapeake Bay Benthic Monitoring Program. 2001. US EPA Chesapeake Bay Program, Annapolis, MD (http://www.chesapeakebay.net).
Chesapeake Bay Program. 2001. Point source loading database. US EPA Chesapeake Bay Program, Annapolis, MD (http://www.chesapeakebay.net).
Chesapeake Bay Phytoplankton Monitoring Program. 2001. US EPA Chesapeake Bay Program, Annapolis, MD (http://www.chesapeakebay.net).
Chesapeake Bay Watershed Model Land Use and Linkages to the Airshed and Estuarine Models. 2000. US EPA Chesapeake Bay Program, Annapolis, MD (http://www.chesapeakebay.net).
Chesapeake Bay Water Quality Monitoring Program. 2001. US EPA Chesapeake Bay Program, Annapolis, MD (http://www.chesapeakebay.net).
Chesapeake Bay Zooplankton Monitoring Program. 2001. US EPA Chesapeake Bay Program, Annapolis, MD (http://www.chesapeakebay.net).
Conley, D.J. 2000. Biogeochemical nutrient cycles and nutrient management strategies. Hydrobiologia 410: 87–96.
Cornwell, J.C., J.C. Stevenson, D.J. Conley, and M. Owens. 1996. A sediment chronology of Chesapeake Bay eutrophication. Estuaries 19: 488–499.
Cowan, J.L.W., and W.R. Boynton. 1996. Sediment–water oxygen and nutrient exchanges along the longitudinal axis of Chesapeake Bay: seasonal patterns, controlling factors and ecological significance. Estuaries 193: 562–580.
Cronin, W.B., and D.W. Pritchard. 1975. Additional statistics on the dimensions of the Chesapeake Bay and its tributaries: cross-section widths and segment volumes per meter depth. Special Report 42. Chesapeake Bay Institute, The Johns Hopkins University. Reference 75–3. Baltimore, MD.
Degobbis, D., and M. Gilmartin. 1990. Nitrogen, phosphorus, and biogenic silicon budgets for the northern Adriatic Sea. Oceanologica Acta 13: 31–45.
D'Elia, C.F., W.R. Boynton, and J. Sanders. 2003. A watershed perspective on nutrient enrichment, science, and policy in the Patuxent River, Maryland: 1960–2000. Estuaries 262A: 171–185.
Domotor, D.K., M.S. Haire, N.N. Panday, and R.M. Summers. 1989. Patuxent estuary water quality assessment: special emphasis 1983–1987. Technical Report No. 104. MD Dept Environment, Baltimore, MD.
Dugdale, R.C., and J.J. Goering. 1967. Uptake of new and regenerated forms of nitrogen in primary productivity. Limnology and Oceanography 12: 196–206.
Donigian, Jr A., B. Bicknell, A. Patwardhan, L. Linker, C. Chang, and R. Reynolds. 1994. Chesapeake Bay Program watershed model application to calculate bay nutrient loadings. Annapolis, MD: U.S. EPA Chesapeake Bay Program Office.
Engqvist, A. 1996. Long-term nutrient balances in the eutrophication of the Himmerfjarden estuary. Estuarine, Coastal and Shelf Science 42: 483–507.
Eyre, B.D., and L.J. McKee. 2002. Carbon, nitrogen, and phosphorus budgets for a shallow subtropical coastal embayment (Moreton Bay, Australia). Limnology and Oceanography 474: 1043–1055.
Fisher, D., and M. Oppenheimer. 1991. Atmospheric nitrogen deposition and the Chesapeake Bay estuary. Ambio 203: 102–108.
Fisher, T.R., A.B. Gustafson, K. Sellner, R. Lacuture, L.W. Haas, R. Magnien, R. Karrh, and B. Michael. 1999. Spatial and temporal variation in resource limitation in Chesapeake Bay. Marine Biology 133: 763–778.
Fisher, T.R., J.D. Hagy III, W.R. Boynton, and M.R. Williams. 2006. Cultural eutrophication in the Choptank and Patuxent estuaries of Chesapeake Bay. Limnology and Oceanography 511, part 2: 435–447.
Gordon Jr, D.C., P.R. Boudreau, K.H. Mann, J.-E. Ong, W.L. Silvert, S.V. Smith, G. Wattayakorn, F. Wulff, and T. Yanagi. 1996. LOICZ Biogeochemical Modelling Guidelines. LOICZ Reports & Studies No 5, 1–96.
Greene, S. 2005a. Tidal Freshwater and oligohaline tidal marshes as nutrient sinks in the Patuxent River estuary, Maryland. MS Thesis, University of Maryland, College Park, MD.
Greene, S. 2005b. Measurements of denitrification in aquatic ecosystems; Literature review and data report. Technical Report Series Ref. No. [UMCES]CBL 05-094. University of Maryland Center for Environmental Science, Solomons, MD.
Hager, S.W., and L.E. Schemel. 1992. Sources of nitrogen and phosphorus to Northern San Francisco Bay. Estuaries 151: 40–52.
Hagy III, J.D. 1996. Residence times and net ecosystem processes in the Patuxent River Estuary. MS Thesis. University of Maryland, College Park, MD.
Hagy, J.D., W.R. Boynton, and M.M. Weir. 1998. Estimating nitrogen and phosphorus loads for Patuxent River, 1960–1977, p.184–211. In Maryland Chesapeake Bay Water Quality Monitoring Program, Ecosystems Processes Component, Level One Report No. 15. Ref. No. [UMCES]CBL, (ed) W.R. Boynton, and F.M. Rohland, 98-073a.Chesapeake Biological Lab, Solomons, MD.
Hagy, J.D., L.P. Sanford, and W.R. Boynton. 2000. Estimation of net physical transport and hydraulic residence times for a coastal plain estuary using box models. Estuaries 233: 328–340.
Hagy, J.D., and W.M. Kemp. 2002. LOICZ Biogeochemical Budgets: Patuxent River, Maryland, Land–Ocean Interactions in the Coastal Zone, International Project Office, Netherlands Institute for Sea Research, Texel (http://www.nioz.nl/loicz/).
Hagy, J.D., W.R. Boynton, C.W. Keefe, and K.V. Wood. 2004. Hypoxia in Chesapeake Bay, 1950–2001: long-term change in relation to nutrient loading and river flow. Estuaries 274: 634–658.
Heinle, D.R. 1966. Production of a calanoid copepod, Acartia tonsa, in the Patuxent River estuary. Chesapeake Science 72: 59–74.
Heinle, D.R., C.F. D’Elia, J.L. Taft, J.S. Wilson, M. Cole-Jones, A.B. Caplins, and L.E. Cronin. 1980. Historical review of water quality and climatic data from Chesapeake Bay with emphasis on effects of enrichment. USEPA Chesapeake Bay Program, Publication 84, Chesapeake Research Consortium.
Herman, P.M.J., J.J. Middleburg, J. Van De Koppel, and C.H.R. Heip. 1999. Ecology and estuarine macrobenthos. Advances in Ecological Research 15(2).
Hobbs III C.H., J.P. Halka, R.T. Kerhin, and M.J. Carron. 1992. Chesapeake Bay sediment budget. Journal of Coastal Research 82: 292–300.
Homer, C., J. Dewitz, J. Fry, M. Coan, N. Hossain, C. Larson, N. Herold, A. McKerrow, J.N. VanDriel, and J. Wickham. 2004. Completion of the 2001 National Land Cover Database for the Conterminous United States. Photogrammetric Engineering & Remote Sensing 734: 337–341.
Howarth, R.W., R. Marino, and J. Lane. 1988. Nitrogen fixation in freshwater, estuarine, and marine ecosystems. 1. Rates and importance. Limnology and Oceanography 334, part 2: 669–687.
Howarth, R.W., G. Billen, D. Swaney, A. Townsend, N. Jaworski, K. Lajtha, J.A. Downing, R. Elmgren, N. Caraco, T. Jordan, F. Berendse, J. Freney, V. Kudeyarov, P. Murdoch, and Z. Zhao-Liang. 1996. Regional nitrogen budgets and riverine N & P fluxes for the drainages to the North Atlantic Ocean: natural and human influences. Biogeochemistry 35: 75–139.
Howarth, R.W., E.W. Boyer, W.J. Pabich, and J.N. Galloway. 2002. Nitrogen use in the United States from 1961–2000 and potential future trends. Ambio 312: 88–96.
Hu, H.L., H.M. Chen, N.P. Nikolaidis, D.R. Miller, and X.S. Yang. 1998. Estimation of nutrient atmospheric deposition to Long Island Sound. Water, Air and Soil Pollution 105: 521–538.
Jenkins, M.C., and W.M. Kemp. 1984. The coupling of nitrification and denitrification in two estuarine sediments. Limnology and Oceanography 29: 609–619.
Jones, R.C. 2000. Long-term trends in phytoplankton chlorophyll a in the tidal freshwater Potomac River, USA: relationship to climate and management factors. Verhandlungen—Internationale Vereinigung für Theoretische und Angewandte Limnologie 27: 2959–2962.
Jordan, T.E., D.L. Correll, D.E. Weller, and N.M. Goff. 1995. Temporal variation in precipitation chemistry on the shore of the Chesapeake Bay. Water, Air and Soil Pollution 83: 263–284.
Jordan, T.E., D.E. Weller, and D.L. Correll. 2003. Sources of nutrient inputs to the Patuxent River estuary. Estuaries 262A: 226–243.
Jørgensen, S.E., S.N. Nielsen, and L.A. Jorgensen (eds). 1991. Handbook of ecological parameters and ecotoxicology. Elsevier: Amsterdam, p 1263.
Kana, T.M., C. Darkangelo, M.D. Hunt, J.B. Oldham, G.E. Bennett, and J.C. Cornwell. 1994. Membrane inlet mass spectrometer for rapid high-precision determination of N2, O2, and Ar in environmental water samples. Analytical Chemistry 66: 4166–4170.
Kearney, M.S., A.S. Rogers, J.P.R.G. Townsend, E. Rizzo, D. Stutzer, J.C. Stevenson, and K.L. Sundberg. 2002. Landsat imagery shows decline of coastal marshes in Chesapeake and Delaware Bays. EOS 3: 173–178.
Keefe, C.W., K.L. Blodnikar, W.R. Boynton, C.A. Clark, J.M. Frank, N.L. Kaumeyer, M.M. Weir, K.V. Wood, and C.F. Zimmermann. 2004. Nutrient analytical services laboratory standard operating procedures. Special Publication Series No. SS-80-04-CBL. University of Maryland System, Center for Environmental and Estuarine Studies, Chesapeake Biological Laboratory, Solomons, MD.
Kemp, W.M., P.A. Sampou, J. Garber, J. Tuttle, and W.R. Boynton. 1992. Seasonal depletion of oxygen from the bottom waters of Chesapeake Bay: roles of benthic and planktonic respiration and physical exchange processes. Marine Ecology. Progress Serie 85: 137–152.
Kemp, W.M., W.R. Boynton, J.E. Adolf, D.F. Boesch, W.C. Boicourt, G. Brush, J.C. Cornwell, T.R. Fisher, P.M. Glibert, J.D. Hagy, L.W. Harding, E.D. Houde, D.G. Kimmel, W.D. Miller, R.I.E. Newell, M.R. Roman, E.M. Smith, and J.C. Stevenson. 2005. Eutrophication of Chesapeake Bay: historical trends and ecological interactions. Marine Ecology. Progress Serie 303: 1–29.
Khan, H., and G.S. Brush. 1994. Nutrient and metal accumulation in a freshwater tidal marsh. Estuaries 172: 345–360.
Kroeze, C., and S.P. Seitzinger. 1998. Nitrogen inputs to rivers, estuaries and continental shelves and related oxide emissions in 1990 and 2050: a global model. Nutrient Cycling In Agroecosystems 52: 195–212.
Langland, M.J., R.E. Edwards, L.A. Sprague, and S.E. Yochum. 2001. Summary of trends and status for flow, nutrients and sediments at selected nontidal sites, Chesapeake Bay basin, 1985–99. U.S. Geological Survey Open File Report 01-73. 49p.
Larsen, III R.K., J.C. Steinbacher, and J.E. Baker. 2001. Ammonia exchange between the atmosphere and the surface waters at two locations In the Chesapeake Bay. Environmental Science & Technology 35: 4731–4738.
Lehrter, J.C., and J. Cebrian. 2008. Uncertainty propagation in an ecosystem nutrient budget. EPA Laboratory, 1 Sabine Island Drive, Gulf Breeze FL 32561 (in preparation).
Linker, L.C., G.W. Shenk, R.L. Dennis, and J.S. Sweeney. 1999. Cross-media models of the Chesapeake Bay watershed and airshed. Chesapeake Bay Program Office, Annapolis, MD. (http://www.chesapeakebay.net/modsc.htm).
Maizel, M.S., G. Muehlbach, P. Baynham, J. Zoerkler, D. Monds, T. Iivari, P. Welle, J. Robbin, and J. Wiles. 1997. The potential for nutrient loadings from septic systems to ground and surface water resources and the Chesapeake Bay. U. S. EPA Report No. 903-R-97-005. Washington, DC.
Malone, T.C., W. Boynton, T. Horton, and C. Stevenson. 1993. Nutrient loadings to surface waters: Chesapeake Bay case study. In Keeping pace with science and engineering, ed. M.F. Uman, 8–38. Washington, DC: National Academy Press.
Marino, R., F. Chan, R.W. Howarth, M. Pace, and G.E. Likens. 2002. Ecological and biogeochemical interactions constrain planktonic nitrogen fixation in estuaries. Ecosystems 5: 719–725.
Mauchline, J. 1998. The biology of calanoid copepods. In Advances in marine biology, eds. J.H. Blaxter, A. Southward, and P.A. Tyler, 1–13. NY: Academic710.
Merrill, J.Z. 1999. Tidal freshwater marshes as nutrient sinks: particulate nutrient burial and denitrification. PhD Dissertation. University of Maryland. College Park, Maryland. 342p.
Merrill, J.L., and J.C. Cornwell. 2000. The role of oligohaline and tidal freshwater marshes in estuarine nutrient cycling. In Concepts and controversies in tidal marsh ecology, (ed), M. Weinstein and D.A. Kreeger, (425–441). Kluwer.
Mihursky, J.A., and W.R. Boynton. 1978. Review of Patuxent estuary data base. Chesapeake Biological Laboratory. Ref. No. UMCEES 78-157CBL. Solomons, MD.
Mikita, K.A. 2002. An investigation of factors influencing the dynamics of the spring phytoplankton bloom in the Patuxent River estuary, Maryland. MS Thesis, University of Maryland, College Park, MD. 163p.
Mortazavi, B., R.L. Iverson, W. Huang, F.G. Lewis, and J. Caffrey. 2000. Nitrogen budget of Apalachicola Bay, a bar-built estuary in the northeastern Gulf of Mexico. Marine Ecology Process Series 195: 1–14.
Naiman, R.J., and J.R. Sibert. 1978. Transport of nutrients and carbon from the Nanaimo River to its estuary. Limnology and Oceanography 236: 1183–1193.
National Atmospheric Deposition Program (NRSP-3)/National Trends Network. 2001. NADP Program Office, Illinois State Water Survey, 2204 Griffith Drive, Champaign. IL 61820.
National Oceanographic and Atmospheric Administration/Environmental Protection Agency (NOAA/EPA). 1989. Strategic Assessment of Near Coastal Waters, Susceptibility of East Coast Estuaries to Nutrient Discharges: Passamaquoddy Bay to Chesapeake Bay. Strategic Assessment Branch, NOS/NOAA, Rockville, MD.
National Research Council. 2000. Clean coastal waters. Understanding and reducing the effects of nutrient pollution. Committee on the Causes and Management of Coastal Eutrophication, Ocean Studies Board and Water Sciences and Technology Board, National Research Council. 393. Washington, D.C.: National Academy Press.
Nixon, S.W. 1997. Prehistoric nutrient inputs and productivity in Narragansett Bay. Estuaries 202: 253–261.
Nixon, S.W., C.D. Hunt, and B.L. Nowicki. 1986a. The retention of nutrients (C,N,P), heavy metals (Mn, Cd, Pb, Cu), and petroleum hydrocarbons in Narragansett Bay. In Biogeochemical processes at the land–sea boundary, eds. P. Lasserre, and J.M. Martin, 99–122. New York, NY: Elsevier Oceanography Series, 43.
Nixon, S.W., C.A. Oviatt, J. Frithsen, and B. Sullivan. 1986b. Nutrients and the productivity of estuarine and coastal marine systems. Journal of the Limnological Society of South Africa 121/2: 43–71.
Nixon, S.W., S.L. Granger, and B.L. Nowicki. 1995. An assessment of the annual mass balance of carbon, nitrogen and phosphorus in Narragansett Bay. Biogeochemistry 31: 15–61.
Nixon, S.W., J.W. Ammerman, L.P. Atkinson, V.M. Berounsky, G. Billen, W.C. Boicourt, W.R. Boynton, T.M. Church, D.M. Ditoro, R. Elmgren, J.H. Garber, A.E. Giblin, R.A. Jahnke, N.J.P. Owens, M.E.Q. Pilson, and S.P. Seitzinger. 1996. The fate of nitrogen and phosphorus at the land–sea margin of the North Atlantic Ocean. Biogeochemistry 35: 141–180.
Paerl, H.W. 1997. Coastal eutrophication and harmful algal blooms: importance of atmospheric deposition and groundwater as “new” nitrogen and other nutrient sources. Limnology and Oceanography 425, part 2: 1154–1165.
Rabalais, N.N. 2002. Nitrogen in aquatic ecosystems. Ambio 312: 102–112.
Roberts, W.P., and J.W. Pierce. 1974. Sediment yield in the Patuxent River, MD undergoing urbanization, 1968–1969. Sedimentary Geology 12: 179–197.
Rysgaard, S., N. Risgaard-Petersen, N.P. Sloth, K. Jensen, and L.P. Nielsen. 1994. Oxygen regulation of nitrification and denitrification in sediments. Limnology and Oceanography 397: 1643–1652.
Rysgaard, S., P.B. Christensen, and L.P. Nielsen. 1995. Seasonal variation in nitrification and denitrification in estuarine sediments colonized by benthic microalgae and bioturbating infauna. Marine Ecology. Progress Serie 126: 111–121.
Schubel, J.R., and C.F. Zabawa. 1977. Agnes in the geological record of the upper Chesapeake Bay, p. 240–248. In the effects of tropical storm Agnes on the Chesapeake Bay System. Baltimore, MD: CRC Publ. No. 54. The Johns Hopkins University Press.
Shenk, G.W., and L.C. Linker. 2001. Simulating the Chesapeake Bay watershed with time-varying land use and management actions. EPA Chesapeake Bay Program Report, Annapolis, MD. 13p.
Smith, E.M. 2000. Factors regulating respiration and its coupling to primary production in a coastal planktonic community. PhD Dissertation, University of Maryland, College Park, MD.285p.
Smith, S.V. 1981. Responses of Kaneohe Bay, Hawaii, to relaxation of sewage stress. In Estuaries and nutrients, eds. B.J. Neilson, and L.E. Cronin, 391–410. Clifton, NJ: Humana.
Smullen, J.T., J.L. Taft, and J. Macknis. 1982. Nutrient and sediment loads to the tidal Chesapeake Bay system. In United States Environmental Protection Agency, Chesapeake Bay Program. p. 147–258. Technical Studies: a Synthesis. Washington, DC.
Stammerjohn, S.E., E. Smith, W.R. Boynton, and W.M. Kemp. 1991. Potential impacts from marinas and boats in Baltimore Harbor. Chesapeake Research Consortium Publication Number 139. Solomons, MD.
Stankelis, R.M., M.D. Naylor, and W.R. Boynton. 2003. Submerged aquatic vegetation In the mesohaline region of the Patuxent estuary: past, present and future status. Estuaries 262A: 186–195.
Stevenson, J.C., M.S. Kearney, and E.M. Koch. 2002. Impacts of sea-level rise on tidal wetlands and shallow water habitats: a case study from Chesapeake Bay. In Fisheries in a Changing Environment, (ed) N.A. McGinn, 23–36. American Fisheries Society Symposium No. 32.
Sweeney, B.F. 1995. Community metabolism in the Patuxent River estuary: 1963–1969 and 1992. Masters Thesis. University of Maryland, College Park, MD. 83p.
Testa, J.M. 2006. Factors regulating variability in water quality and net biogeochemical fluxes in the Patuxent River estuary. Univ Maryland Masters Thesis, College Park, MD p.1–166.
Twilley, R.R., and W.M. Kemp. 1987. Estimates of sediment denitrification and its influence on the fate of nitrogen in Chesapeake Bay. Annapolis, MD: USEPA, Chesapeake Bay Program.
United States Geological Survey. 2004. Chesapeake Bay River Input Monitoring Program. URL://va.water.usgs.gov/chesbay/RIMP/index.html.
Valiela, I., and J.E. Costa. 1988. Eutrophication of Buttermilk Bay, a Cape Cod coastal embayment: concentrations of nutrients and watershed nutrient budgets. Environmental Management 124: 539–553.
Valiela, I., J.L. Bowen, M.L. Cole, K.D. Kroeger, D. Lawrence, W.J. Pabich, G. Tomasky, and S. Mazzilli. 2001. Following up on a Margalevian concept: interactions and exchanges among adjacent parcels of coastal landscapes. Scientia Marina 65Suppl. 2: 215–229.
Van Breemen, N., E.W. Boyer, C.L. Goodale, N.A. Jaworski, K. Paustian, S.P. Seitzinger, K. Lajtha, B. Mayer, D. Van Dam, R.W. Howarth, K.J. Nadelhoffer, M. Eve, and G. Billen. 2002. Where did all the nitrogen go? Fate of nitrogen inputs to large watersheds in the northeastern U.S.A. Biogeochemistry 57/58: 267–293.
Vitousek, P.M., H.A. Mooney, J. Lubchenco, and J.M. Melillo. 1997. Human domination of earth’s ecosystems. Science 277: 494–499.
Walve, J., and U. Larsson. 1999. Carbon, nitrogen and phosphorus stoichiometry of crustacean zooplankton in the Baltic Sea: implications for nutrient cycling. Journal of Plankton Research 2112: 2309–2321.
Wiedeman, A., and A. Cosgrove. 1998. Chesapeake Bay Watershed Model Application and Calculation of Nutrient and sediment loading—Appendix F: phase IV Chesapeake Bay Watershed Model Point Source Loads. Report of the Nutrient Subcommittee. Chesapeake Bay Program Office, Annapolis, MD (http://www.chesapeakebay.net/modsc.htm).
Wies, R.A., and R.J. O’Melia. 1989. Acid rain deposition monitoring. Air Management Division. Maryland Department of the Environment. Baltimore, MD.
Williams, M.R., T.R. Fisher, W.R. Boynton, C.F. Cerco, W.M. Kemp, K.N. Eshleman, S.-C. Kim, R.R. Hood, D.A. Fiscus, and G.R. Radcliffe. 2006. An integrated modeling system for management of the Patuxent River estuary and basin, Maryland, USA. International Journal of Remote Sensing 2717: 3705–3726.
Yurkovskis, A., F. Wulff, L. Rahm, A. Andruzaitis, and M. Rodrigues-Medina. 1993. A nutrient budget of Gulf of Riga; Baltic Sea. Estuarine, Coastal and Shelf Science 37: 113–127.
Zheng, X., C. Fu, X. Xu, X. Yan, Y. Huang, S. Han, F. Hu, and G. Chen. 2002. The Asian nitrogen cycle case study. Ambio 312: 79–87.
Acknowledgments
We acknowledge the following colleagues and institutions for their assistance in completing this work. L. Linker, G. Shenk and K. Hopkins, US EPA Chesapeake Bay Program, provided estimates of diffuse source nutrient loads for the Patuxent basin. Dr. N. Panday, MD Dept Environment, provided nutrient point source and river area and volume data. K. A. Mikita and K. V. Wood assisted with data compilation and analyses. We thank Dr. Joseph Mihursky for nurturing this scale of analysis for many decades. This work was supported by the Integration and Analysis Network (IAN) of the UMD Center for Environmental Science, National Science Foundation (DEB-9412113, DEB-0212636) National Oceanographic and Atmospheric Administration (NOAA NA07NO54780191) and the MD Chesapeake Bay Biomonitoring Program (RAT-6/01-117).
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Boynton, W.R., Hagy, J.D., Cornwell, J.C. et al. Nutrient Budgets and Management Actions in the Patuxent River Estuary, Maryland. Estuaries and Coasts 31, 623–651 (2008). https://doi.org/10.1007/s12237-008-9052-9
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DOI: https://doi.org/10.1007/s12237-008-9052-9