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Water-Quality Monitoring and Biological Integrity Assessment in the Indian River Lagoon, Florida: Status, Trends, and Loadings (1988–1994)

Author

Listed:
  • Gilbert C. Sigua

    (Environmental Sciences Division, St. Johns River Water Management District, P.O. Box 1429, Palatka, Florida 32178, USA)

  • Joel S. Steward

    (Environmental Sciences Division, St. Johns River Water Management District, P.O. Box 1429, Palatka, Florida 32178, USA)

  • Wendy A. Tweedale

    (Environmental Sciences Division, St. Johns River Water Management District, P.O. Box 1429, Palatka, Florida 32178, USA)

Abstract

a production in the central, south central, and the south segments of the lagoon. In a system as large and complex as the lagoon, N and P limitations are potentially subject to significant spatial and temporal variability. Total Kjeldahl nitrogen (TN) was higher in the north (1.25 mg/liter) and lower in the south (0.89 mg/liter). The reverse pattern was observed for total P (TP), i.e., lowest in the north (0.03 mg/liter) and highest at the south (0.14 mg/liter) ends of the IRL. This increased P concentration in the SIRL appears to have a significantly large effect on chlorophyll a production compared with the other segments, as indicated by stepwise regression statistics. This relationship can be expressed as follows: South IRL [chlorophyll a] =−8.52 + 162.41 [orthophosphate] + 7.86 [total nitrogen] + 0.38 [turbidity]; R 2= 0.98**.

Suggested Citation

  • Gilbert C. Sigua & Joel S. Steward & Wendy A. Tweedale, 2000. "Water-Quality Monitoring and Biological Integrity Assessment in the Indian River Lagoon, Florida: Status, Trends, and Loadings (1988–1994)," Environmental Management, Springer, vol. 25(2), pages 199-209, February.
    • Handle: RePEc:spr:envman:v:25:y:2000:i:2:d:10.1007_s002679910016
    DOI: 10.1007/s002679910016
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