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2000 Harbor Benthic Monitoring Report 2000 harbor benthic monitoring report Massachusetts Water Resources Authority Environmental Quality Department Report ENQUAD 2002-02 Citation: Kropp RK, Diaz RJ, Dahlen DT, Boyle JD, Hunt, CD. 2002. 2000 Harbor Benthic Monitoring Report. Boston: Massachusetts Water Resources Authority. Report ENQUAD 2002-02. 101 p. plus appendices. 2000 HARBOR BENTHIC MONITORING REPORT submitted to MWRA Water Resources Authority Environmental Quality Department 100 First Avenue Charlestown Navy Yard Boston, MA 02129 (617) 242-6000 prepared by Roy K. Kropp1 Robert J. Diaz2 Deirdre T. Dahlen3 Jeanine D. Boyle3 Carlton D. Hunt3 1Battelle Marine Sciences Laboratory 1529 West Sequim Bay Road Sequim, WA 98382 2Diaz and Daughters 6198 Driftwood Lane Ware Neck, VA 23178 3 Battelle 397 Washington Street Duxbury, MA 02332 May 2002 Report No. 2002-02 . 2000 Harbor Benthic Monitoring Report July 2002 TABLE OF CONTENTS EXECUTIVE SUMMARY........................................................................................................................... v 1.0 INTRODUCTION .............................................................................................................................1-1 1.1 Program Background.................................................................................................................1-1 1.2 Overview of this Report ............................................................................................................1-1 2.0 FIELD OPERATIONS.......................................................................................................................2-1 2.1 Sampling Design........................................................................................................................2-1 2.1.1 Traditional ....................................................................................................................2-1 2.1.2 Reconnaissance.............................................................................................................2-1 2.2 Surveys/Samples Collected .......................................................................................................2-1 2.3 Field Methods Overview ...........................................................................................................2-4 2.3.1 Vessel/Navigation.........................................................................................................2-4 2.3.2 Grab Sampling..............................................................................................................2-4 2.3.3 SPI ................................................................................................................................2-4 3.0 2000 SEDIMENT PROFILE CAMERA RECONNAISSANCE OF HARBOR BENTHIC HABITATS ........................................................................................................................................3-1 3.1 Materials and Methods ..............................................................................................................3-1 3.1.1 Field Methods...............................................................................................................3-1 3.1.2 Image Analysis .............................................................................................................3-1 3.2 Results and Discussion ..............................................................................................................3-1 3.2.1 2000 Harbor Image Data ..............................................................................................3-1 3.2.1.1 Physical Processes and Sediments .................................................................3-1 3.2.1.2 Apparent Color RPD Layer Depth.................................................................3-9 3.2.1.3 Biogenic Activity.........................................................................................3-12 3.2.1.4 Successional Stage and Organism Sediment Index .....................................3-12 3.2.2 2000 Harbor Summary ...............................................................................................3-13 3.2.3 Long-term Benthic Habitat Conditions: 1992 to 2000 ...............................................3-14 4.0 ANALYTICAL CHEMISTRY ..........................................................................................................4-1 4.1 Methods .....................................................................................................................................4-1 4.1.1 Laboratory Analyses for Ancillary Measurements.......................................................4-1 4.1.2 Statistical Analyses and Data Treatments.....................................................................4-1 4.2 Results and Discussion ..............................................................................................................4-2 4.2.1 Grain Size 1991–2000 ..................................................................................................4-2 4.2.2 Total Organic Carbon 1991–2000 ................................................................................4-8 4.2.3 Clostridium perfringens 1991–2000...........................................................................4-11 4.2.4 Correspondence within Ancillary Measurements.......................................................4-17 4.3 Conclusions .............................................................................................................................4-22 5.0 2000 SOFT-BOTTOM INFAUNAL COMMUNITIES.....................................................................5-1 5.1 Methods .....................................................................................................................................5-1 5.1.1 Laboratory Analyses.....................................................................................................5-1 5.1.2 Data Analyses...............................................................................................................5-1 5.1.3 Total Species Richness Analysis ..................................................................................5-2 5.1.4 Cluster & Ordination ....................................................................................................5-2 5.2 Results and Discussion ..............................................................................................................5-2 5.2.1 2000 Station T06 Sample Handling Problem ...............................................................5-2 5.2.2 2000 Descriptive Community Measures ......................................................................5-3 5.2.3 2000 Harbor Multivariate Analysis ............................................................................5-10 i 2000 Harbor Benthic Monitoring Report July 2002 5.2.4 Descriptive Community Measures: 1991–2000 Harbor-wide Patterns ......................5-17 5.2.5 Descriptive Community Measures: 1991–2000 Station Patterns ...............................5-22 5.2.6 Multivariate Community Analyses: 1991–2000.........................................................5-28 6.0 LITERATURE CITED ......................................................................................................................6-1 LIST OF TABLES Table 2-1. Survey dates and numbers of samples collected on Boston Harbor benthic surveys in 2000....................................................................................................................................2-1 Table 3-1. Summary of sediment profile image data for Boston Harbor, August 2000..........................3-3 Table 3-2. Long-term data for the organism sediment index from 1992 to 2000..................................3-17 Table 4-1. Grain size, TOC, and Clostridium perfringens data from sediments collected at Traditional stations in April and August 2000 .......................................................................4-3 Table 4-2. Grand station mean, standard deviation, and coefficient of variation results for sediment parameters from April and August surveys............................................................................4-3 Table 4-3. Correspondence within bulk sediment properties and against Clostridium perfringens for April surveys from 1993 to 2000....................................................................................4-17 Table 4-4. Correspondence within bulk sediment properties and against Clostridium perfringens for September 1991 and August surveys from 1992 to 2000...............................................4-17 Table 5-1. Descriptive ecological parameters for samples collected from Boston Harbor in Spring 2000 ............................................................................................................................5-4 Table 5-2. Relative contribution of higher-level taxa to infaunal abundance among Spring 2000 Boston Harbor samples ..........................................................................................................5-5 Table 5-3. Descriptive ecological parameters for samples collected from Boston Harbor in Summer 2000 .........................................................................................................................5-6 Table 5-4. Relative contribution of higher-level taxa to infaunal abundance among Summer 2000 Boston Harbor samples ..........................................................................................................5-8 Table 5-5. Relative contribution of higher-level
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