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The Condition of South Carolina's The Condition of South Carolina’s Estuarine and Coastal Habitats During 1999-2000 Technical Report An Interagency Assessment of South Carolina’s Coastal Zone DHEC PROMOTE PROTECT PROSPER South Carolina Department of Health and Environmental Control ED STA IT TE N S U E Y N C V N I R E O G N A M E N N I O T T A L C P R O T E The Condition of South Carolina’s Estuarine and Coastal Habitats During 1999 - 2000 Technical Report Prepared by: R.F. Van Dolah, P.C. Jutte, G.H.M. Riekerk, M.V. Levisen, L.E. Zimmerman, J.D. Jones, A.J. Lewitus Marine Resources Division South Carolina Department of Natural Resources P.O. Box 12559 Charleston, SC 29412 D.E. Chestnut, W. McDermott Bureau of Water South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, SC 29201 D. Bearden, G.I. Scott, M.H. Fulton Center for Coastal Environmental Health and Biomolecular Research NOAA NOS CCEHBR Laboratory 219 Ft. Johnson Rd Charleston, SC Technical Report No. 90 2002 This document should be cited as follows: Van Dolah, R.F., P.C. Jutte, G.H.M. Riekerk, M.V. Levisen, L.E. Zimmerman, J.D. Jones, A.J. Lewitus, D.E. Chestnut, W. McDermott, D. Bearden, G.I. Scott, M.H. Fulton. 2002. The Condition of South Carolina’s Estuarine and Coastal Habitats During 1999- 2000: Technical Report. Charleston, SC: South Carolina Marine Resources Division. Technical Report No. 90. 132p. TABLE OF CONTENTS TABLE OF CONTENTS..................................................................................................... i LIST OF FIGURES ............................................................................................................ ii LIST OF TABLES.............................................................................................................. v 1. INTRODUCTION .......................................................................................................... 1 2. METHODS ..................................................................................................................... 3 2.1. Sampling Design...................................................................................................... 3 2.2. Water Quality Measurements .................................................................................. 4 2.3. Biological and Sediment Sampling.......................................................................... 5 2.4. Habitat Evaluation ................................................................................................... 7 2.5. Quality Assurance.................................................................................................... 7 2.6. Data Analyses .......................................................................................................... 8 3. RESULTS AND DISCUSSION..................................................................................... 9 3.1. Station Array............................................................................................................ 9 3.2. Water Quality........................................................................................................... 9 Temperature .............................................................................................................. 14 Salinity ...................................................................................................................... 14 Dissolved Oxygen..................................................................................................... 15 pH.............................................................................................................................. 17 Nutrients.................................................................................................................... 19 Biochemical Oxygen Demand .................................................................................. 22 Total Organic Carbon ............................................................................................... 22 Fecal Coliform Bacteria............................................................................................ 23 Turbidity ................................................................................................................... 24 Alkalinity .................................................................................................................. 25 Integrated Water Quality Measure............................................................................ 25 3.3 Sediment Quality ................................................................................................... 28 Sediment Composition.............................................................................................. 28 TOC........................................................................................................................... 28 TAN .......................................................................................................................... 29 Contaminants ............................................................................................................ 30 Toxicity..................................................................................................................... 32 Integrated Assessment of Sediment Quality............................................................. 33 3.4 Biological Condition.............................................................................................. 35 Phytoplankton ........................................................................................................... 35 Benthic Communities................................................................................................ 36 Finfish and Crustacean Communities ....................................................................... 41 Contaminant Levels in Fish Tissue........................................................................... 47 3.5 Incidence of Litter.................................................................................................. 48 3.6 Integrated Measure of South Carolina’s Estuarine Habitat Quality ...................... 48 ACKNOWLEDGEMENTS.............................................................................................. 55 LITERATURE CITED ..................................................................................................... 57 DATA APPENDICES ...................................................................................................... 63 i LIST OF FIGURES Figure 2.1. Depiction of tidal creek and open water habitats in the Charleston Harbor area. The pie chart shows the percentage of each habitat for the whole coastal zone, excluding the un-sampled shoals (primarily mud flats) and vegetated salt marsh. .... 4 During each station visit, sampling crews noted whether there were any urban/suburban development or industrial sites visible within 1 km or greater than 1 km from the station. The presence of litter was also recorded. ...................................................... 4 Figure 2.2. Example of a CDF analysis using dissolved oxygen data from tidal creeks. The dotted line shows upper and lower 95% confidence limits. Based on these data, 46% of the state’s tidal creek habitat has a daily average bottom dissolved oxygen concentration < 4 mg / L during the summer index sampling period......................... 8 Figure 3.1.1. Distribution of open water and tidal creek stations sampled throughout South Carolina’s coastal zone during 1999 – 2000. ................................................. 10 Figure 3.1.2. Distribution of open water and tidal creek stations sampled in the northern portion of the state during 1999 – 2000.................................................................... 11 Figure 3.1.3. Distribution of open water and tidal creek stations sampled in the central portion of the state during 1999 – 2000.................................................................... 12 Figure 3.1.4. Distribution of open water and tidal creek stations sampled in the southern portion of the state during 1999 – 2000.................................................................... 13 Figure 3.2.1. Comparison of the average salinity concentrations observed in tidal creek and open water habitats during 1999-2000, and estimates of the percent of the state’s coastal habitat that represented various salinity ranges based the average of measurements obtained over 25-hrs at each station.................................................. 15 Figure 3.2.2. Comparison of the average dissolved oxygen concentrations observed in tidal creek and open water habitats during 1999-2000, and estimates of the percent of the state’s coastal habitat representing various DO ranges based on the average of measurements obtained over 25-hrs at each station.................................................. 16 Figure 3.2.3. Typical dissolved oxygen concentrations observed during various tidal and diurnal periods in tidal creek versus open water habitats during 1999-2000. Shaded areas represent night-time periods. Dotted lines show tidal stage........................... 17 Figure 3.2.4. Comparison of the average pH concentrations observed in tidal creek and open water habitats during 1999-2000, and estimates of the percent of the state’s coastal habitat representing various pH ranges based on the average of measurements obtained over 25-hrs at each station.................................................. 18 Figure 3.2.5. Comparison of the average total nitrogen (TN) concentrations
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