Marine Biology

, Volume 133, Issue 4, pp 763–778

Spatial and temporal variation of resource limitation in Chesapeake Bay

  • T. R. Fisher
  • A. B. Gustafson
  • K. Sellner
  • R. Lacouture
  • L. W. Haas
  • R. L. Wetzel
  • R. Magnien
  • D. Everitt
  • B. Michaels
  • R. Karrh
Article

DOI: 10.1007/s002270050518

Cite this article as:
Fisher, T., Gustafson, A., Sellner, K. et al. Marine Biology (1999) 133: 763. doi:10.1007/s002270050518

Abstract

We report nutrient addition bioassays at 18 stations in Chesapeake Bay (USA) to assess resources limiting phytoplankton growth. Data were pooled from several sampling programs conducted from 1989 to 1994. Spatially, light and P limitation declined from low salinity regions to high salinity regions, as N limitation increased. This spatial pattern was driven primarily by freshwater inflows with high N/P and seawater inflows with low N/P. Seasonally, there was a marked progression of winter light limitation, spring P limitation, and summer N limitation at mesohaline and polyhaline stations. The seasonal pattern appeared to be caused by temperature, mixing, river discharge, and sediment P fluxes. At high salinity stations, we also observed winter N limitation (caused by DIN depletion prior to spring nitrate delivery), and at lower salinity stations there was fall P limitation (caused by reaeration of bottom sediments). At tidal fresh stations, turbidity and nutrient concentrations resulted in continuous light limitation, except at some stations in summer. Interannual decreases in light limitation and increases in N and P limitation appear to represent improvements in water quality.

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • T. R. Fisher
    • 1
  • A. B. Gustafson
    • 1
  • K. Sellner
    • 2
  • R. Lacouture
    • 2
  • L. W. Haas
    • 3
  • R. L. Wetzel
    • 3
  • R. Magnien
    • 4
  • D. Everitt
    • 4
  • B. Michaels
    • 4
  • R. Karrh
    • 4
  1. 1.Horn Point Laboratories, University of Maryland – CES, P.O. Box 775, Cambridge, Maryland 21613, USAUS
  2. 2.Benedict Estuarine Research Laboratory, Academy of Natural Sciences, 10545 Mackall Road, St. Leonard, Maryland 20685, USAUS
  3. 3.Virginia Institute of Marine Sciences, College of William and Mary, Gloucester Point, Virginia 23062, USAUS
  4. 4.Maryland Dept. of Natural Resources, Chesapeake Bay and Special Projects Division, Annapolis, Maryland 21401, USAUS