NEW: Annual Report - George Mason University

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Table 16 The number of trawls in each month at Stations 7, 9, and 10 in each year Year Months J F M A M J J A S O N D 2003 1 2 2 2 2 1 1 1 1 1 2002 Sta 7 & 9 1 2 2 2 2 2 2 1 1 1 Sta 10 0 2 2 2 2 2 2 1 1 1 2001 Sta 7 1 2 2 1 2 3 2 1 1 1 Sta 9 1 2 1 1 2 3 2 1 1 1 Sta 10 1 2 2 1 2 3 2 1 1 1 2000 1 2 2 2 2 2 2 2 1 1 1999 1 2 2 2 2 2 2 1 1 1 1998 1 2 2 2 2 2 2 1 1 1 1997 1 2 2 2 2 2 2 2 1 1 1996 Sta 7 1 2 2 1 2 1 2 1 1 1 Sta 10 1 2 1 2 2 1 2 1 1 1 Sta 9 1 2 2 1 2 1 2 1 1 1 1995 1 2 2 2 2 2 2 2 1 1994 1 1 1 2 2 2 2 1 1993 1 1 2 2 3 2 2 2 1 1 1992 Sta 7 and 10 1 1 1 1 1 1 1 1 1 1 Sta 9 1 1 1 1 1 1 1 1 1 1991 1 1 1 1 1 1 1 1 1 1990 1 1 1 1 1 1 1 1 1989 1 1 1 1 1 1 2 2 1 1 1988 Sta 7 and 10 1 1 1 2 2 2 2 1 1 Sta 9 2 1 1 1987 Sta 7 and 10 1 1 1 1 1 1 1 1 1 1986 Sta 7 and 10 1 1 1 1 1 1 1 1 1 1985 Sta 7 and 10 1 1 1 1 1 2 1 1984 Sta 7 and 10 1 2 3 2 3 2 3 3 2 1 115
116 Table 17 Mean catch of adult and juvenile fishes per trawl in all months at each station Year Station 10 Station 7 Station 9 2003 39.4 61.3 62.5 2002 70.9 91.2 52.9 2001 119.1 167.8 77.1 2000 44.8 95.1 52.4 1999 56.6 117.2 23.1 1998 78.1 88.3 22.1 1997 51.4 111.5 49.6 1996 31.5 64.5 14.0 1995 69.6 107.6 31.9 1994 62.1 122.2 31.9 1993 109.2 354.9 31.2 1992 70.2 155.5 27.5 1991 73.6 173.9 67.9 1990 68.4 77.2 101.5 1989 104.2 52.6 14.3 1988 96.2 95.8 19.2 1987 131.9 84.3 1986 153.4 95.8 1985 146.1 122.6 1984 207.7 197.4
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An Ecological Study of Gunston Cove
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ii An Ecological Study of Gunston C
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iv were collected on three sample d
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vi We recommend that: 1. Long term
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2 INTRODUCTION This section reports
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4 Table 1 Sampling Dates and Weathe
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6 immediately with formalin to a co
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8 subsample of known volume and res
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10 A. Climate and Hydrological Fact
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12 B. Physico-chemical Parameters:
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14 Dissolved Oxygen (mg/L) 16 14 12
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16 pH, NC Lab 9.5 9.0 8.5 8.0 7.5 7
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18 Secchi Depth (m) 1.2 1.0 0.8 0.6
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20 Ammonia Nitrogen (mg/L) 0.30 0.2
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22 Organic Nitrogen (mg/L) 1.2 1.0
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24 N/P Ratio (by mass) 60 50 40 30
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26 C. Phytoplankton Chlorophyll a,
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28 Figure 32. Phytoplankton Density
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30 The dominant cyanobacteria on a
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32 Total phytoplankton biovolume ca
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34 Melosira Figure 44. Phytoplankto
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36 Bosmina Density by Station (#/L)
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38 Moina Density by Station (#/m 3
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40 Diaptomus Density by Station (#/
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42 E. Ichthoplankton Larval fishes
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44 Clupeid Larvae (#/10m 3 ) 50 40
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46 Table 4 Adult and Juvenile Fish
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48 The abundance of each species in
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50 Average Number of Fish per Trawl
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56 Average Fish per Seine 600 500 4
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58 Macrobenthos (#/m 2 ) 500 400 30
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60 Total phosphorus levels were fai
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62 Table 10 Correlation and Linear
Page 71 and 72: 64 Water Temperature (oC) 35 30 25
Page 73 and 74: 66 Chloride (mg/L) 350 300 250 200
Page 75 and 76: 68 Dissolved Oxygen (% saturation)
Page 77 and 78: 70 Light Attenuation Coefficient (m
Page 79 and 80: 72 Lab pH, GMU 11 10 9 8 7 Station
Page 81 and 82: 74 Total Alkalinity (mg/L CaCO3), G
Page 83 and 84: 76 Biochemical Oxygen Demand (mg/L)
Page 85 and 86: 78 Volatile Suspended Solids (mg/L)
Page 87 and 88: 80 Soluble Reactive Phosphorus (mg/
Page 89 and 90: 82 Un-ionized Ammonia Nitrogen (mg/
Page 91 and 92: 84 Nitrite Nitrogen (mg/L) 0.100 0.
Page 93 and 94: 86 Nitrogen:Phosphorus Ratio 70 60
Page 95 and 96: 88 Chlorophyll a, Surface (ug/L) 10
Page 97 and 98: 90 PBmax (ug C/ug Chl a/hr) 30 25 2
Page 99 and 100: 92 D. Zooplankton Trends: 1990-2003
Page 101 and 102: 94 Brachionus (#/L) 1000.0 100.0 10
Page 103 and 104: 96 Filinia (#/L) 1000.0 100.0 10.0
Page 105 and 106: 98 Polyarthra (#/L) 1000.0 100.0 10
Page 107 and 108: 100 Diaphanosoma (#/m3) 100000.00 1
Page 109 and 110: 102 Chydorid Cladocera (#/m3) 1000.
Page 111 and 112: 104 Copepod Nauplii (#/L) 1000.0 10
Page 113 and 114: 106 Clupeid Larvae (#/10m3) 1000.0
Page 115 and 116: 108 Atherinid Larvae (#/10m3) 10.00
Page 117 and 118: 110 F. Adult and Juvenile Fish Tren
Page 119 and 120: 112 Table 14 Mean catch of adult an
Page 121: 114 Table 15 Mean catch of adult an
Page 125 and 126: 118 Mean Catch Per Trawl 50 40 30 2
Page 127 and 128: 120 Mean Catch Per Trawl 8 6 4 2 Tr
Page 129 and 130: 122 Mean Catch Per Trawl 120 100 80
Page 131 and 132: 124 Mean Catch Per Trawl 16 14 12 1
Page 133 and 134: 126 Seines The mean annual catch pe
Page 135 and 136: 128 Table 19 The number of seines i
Page 137 and 138: 130 Mean Catch Per Seine 300 250 20
Page 139 and 140: 132 Mean Catch Per Seine 250 200 15
Page 141 and 142: 134 G. Benthos Trends Oligochaetes
Page 143 and 144: 136 Amphipods (#/m2) 16 12 8 4 Stat
Page 145 and 146: 138 Corbicula (#/m2) 40 30 20 10 St
Page 147 and 148: 140 Table 21 Summary of Important T
Page 149 and 150: 142 observed through 1995. This has
Page 151 and 152: 144 being filled. A dredged channel
Page 153 and 154: 146 Anadromous Fish Survey Pohick,
Page 155 and 156: 148 sized fishes were seen, an atte
Page 157 and 158: 150 Table 3. Fish eggs and larvae c
Page 159 and 160: 152 Total 7 11 237 13 2 64 119 (2.3
Page 161 and 162: 154 Table 7. Adult anadromous and s
Page 163 and 164: 156 Table 8. Summary of alewife spa
Page 165 and 166: 158 Spawning information on gizzard
Page 167 and 168: 160 The information that pertains t
Page 169 and 170: 162 lower reaches of Pohick Creek i
Page 171 and 172: 164 Table 13. Catches of adult clup
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Appendix A Phytoplankton Species Di
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