Phytoplankton population dynamics and productivity in a sewage-enriched tidal Creek in North Carolina
Tóm tắt
Calico Creek differs from neighboring estuaries in that it receives sewage effluent, and its waters therefore contain ample nutrients. High nutrient levels enable the phytoplankton population, which is probably light-limited, to reach densities of 109 cells·1−1 during the summer, 2 to 3 orders of magnitude higher than the surrounding, nutrient-limited populations. At cell densities greater than 108 cells·1−1 the number of dominant species is greatly reduced, and the level of diversity drops sharply. Calico Creek also differs by being very shallow; the population can be drastically affected by high runoff. The productivity of both the phytoplankton and the surroundingSpartina marsh is much higher than the neighboring unpolluted estuaries. Unlike the larger and more stable estuaries nearby, the dependence of the population on the effluent for nutrients, the possibility of toxic materials entering the creek with the effluent, and its small size make Calico Creek subject to sudden change.
Tài liệu tham khảo
Barnes, H. 1959. Apparatus and methods of oceanography. George Allen and Unwin, London.
Bender, M. E., D. M. Axelrad, and K. A. Moore. 1976. Nitrogen, phosphorus, and carbon flux in Chesapeake Bay marshes. Bulletin 79, Virginia Water Resources Research Center.
Campbell, P. H. 1973. Studies on brackish water phytoplankton. University of North Carolina Sea Grant Publication #UNC-SG-73-07, Raleigh.
Carpenter, E. J. 1971. Annual phytoplankton cycle of the Cape Fear River estuary, North Carolina.Chesapeake Sci. 12:95–104.
Copeland, B. J., andJ. E. Hobbie. 1972. Phosphorus and eutrophication in the Pamlico River estuary, N.C., 1966–1969—a summary. Report #65, Water Resources Research Institute, University of North Carolina, Raleigh.
Day, J. W., Jr. 1971. Carbon metabolism in brackish-water ponds, p. 42–75.In E. J. Kuenzler and A. F. Chestnut (eds.), Structure and functioning of estuarine ecosystems exposed to treated sewage wastes. Annual report for 1970–71 to Office of North Carolina Sea Grant Programs.
Harris, G. P., andR. E. H. Smith. 1977. Observations of small-scale spatial patterns in phytoplankton populations.Limnol. Oceanogr. 22:887–899.
Harrison, W. G., andJ. E. Hobbie. 1974. Nitrogen budget of a North Carolina estuary. Report #86, Water Resources Research Institute, University of North Carolina, Raleigh.
Hobbie, J. E. 1971. Phytoplankton species and populations in the Pamlico River estuary of North Carolina. Report #56, Water Resources Research Institute, University of North Carolina, Raleigh.
— 1974. Nutrients and eutrophication in the Pamlico River estuary, N.C. Report #100, Water Resources Research Institute, University of North Carolina, Raleigh.
Hommersand, M. H., and D. M. Talbert. 1971. Laboratory studies on the growth and nutrition ofMonodus from the treated sewage ponds in Morehead City, p. 174–181.In E. J. Kuenzler and A. F. Chestnut (eds.), Structure and functioning of estuarine ecosystems exposed to treated sewage wastes. Annual report for 1970–71 to Office of North Carolina Sea Grant Programs.
Kuenzler, E. J. 1970. Phytoplankton populations: A preliminary report, p. 94–111.In H. T. Odum and A. F. Chestnut (eds.), Studies of marine estuarine ecosystems developing with treated sewage wastes. Annual report to Office of Sea grant and North Carolina Board of Science and Technology.
Kuenzler, E. J., S. D. Wyman, and H. N. McKellar. 1971. Notes on hydrography and phytoplankton of Calico Creek, p. 9–22.In E. J. Kuenzler and A. F. Chestnut (eds.), Structure and functioning of estuarine ecosystems exposed to treated sewage wastes, II. Supplement to Annual report for 1970–71 to Office of North Carolina Sea Grant Programs.
Lorenzen, C. J. 1967. Determination of chlorophyll and phaeo-pigments: spectrophotometric equations.Limnol. Oceanogr. 12:343–346.
McKellar, H. N. 1971. The phosphorus system of brackish-water ponds receiving treated municipal wastes. MS thesis, University of North Carolina, Chapel Hill.
McMahan, E. A., R. L. Knight, andA. R. Camp. 1972. A comparison of microarthropod populations in sewage-exposed and sewage-freeSpartina salt marshes.Environ. Entomol. 1:244–252.
Marshall, D. E. 1970. Characteristics ofSpartina marsh which is receiving treated municipal sewage wastes, p. 317–358.In H. T. Odum and A. F. Chestnut (eds.), Studies of marine estuarine ecosystems developing with treated sewage wastes. Annual report to Office of Sea Grant and North Carolina Board of Science and Technology.
Mullin, J. B., andJ. P. Riley. 1955. The spectrophotometric determination of nitrate in natural waters, with particular reference to sea water.Anal. Chim. Acta 12:464–480.
Murphy, J., andJ. P. Riley. 1962. A modified single solution method for the determination of phosphate in natural waters.Anal. Chim. Acta 27:31–36.
Patten, B. C. 1962. Species diversity in net phytoplankton of Raritan Bay.J. Mar. Res. 20:57–75.
Sanders, J. G. 1978. Enrichment of estuarine phytoplankton by the addition of dissolved manganese.Mar. Environ. Res. 1:59–66.
Smith, M. A. 1971. Productivity of marine ponds receiving treated sewage. MS thesis, University of North Carolina, Chapel Hill.
Solorzano, L. 1969. Determination of ammonia in natural waters by the phenolhypochlorite method.Limnol. Oceanogr. 14:799–801.
Stiven, A. E., and E. J. Kuenzler. 1978. The response of two salt marsh molluscs,Littorina irrorata andGeukensia demissa, to field manipulations of density and marsh grass. Unpublished manuscript.
Thayer, G. W. 1969. Phytoplankton production and factors influencing production in the shallow estuaries near Beaufort, N.C. Ph.D. thesis, North Carolina State University, Raleigh.
— 1971. Phytoplankton production and the distribution of nutrients in a shallow unstratified estuarine system near Beaufort, N.C.Chesapeake Sci. 12:240–253.
— 1974. Identity and regulation of nutrients limiting phytoplankton production in the shallow estuaries near Beaufort, N.C.,Oecologia 14:75–92.
Williams, R. B. 1966. Annual phytoplanktonic production in a system of shallow temperate estuaries, p. 699–716.In H. Barnes (ed.), Some contemporary studies in marine science. George Allen and Unwin, London.
—, andM. B. Murdoch. 1966. Phytoplankton production and chlorophyll concentrations in the Beaufort Channel, N.C.Limnol. Oceanogr. 11:73–82.
Woods, W. J. 1970. The chemical composition of primary producers, p. 144–173.In H. T. Odum and A. F. Chestnut (eds.), Studies of marine estuarine ecosystems developing with treated sewage wastes. Annual report to Office of Sea Grant and North Carolina Board of Science and Technology.
Vollenweider, R. A. 1974. A manual on methods for measuring primary production in aquatic environments. IBP Handbook #12, Blackwell, Oxford.