Table 3.Responses of L. perenne After 59-day Incubation1

ERDC TN-DOER-R3

September 2004

Table 3

Responses of L. perenne After 59-day Incubation1

Dredged Material Mixture

Plant

Reference

10% IHC

20% IHC

33% IHC

Characteristic

Dry

Wet

Dry

Wet

Dry

Wet

Dry

Wet

Biomass

65.83+3.94

Shoots

95.79+11.56A

19.21+4.50

57.89+6.28B

3.13+0.75

19.10+3.40C

0.59+0.20

3.98+1.42D

-2

(g DW m )

15.71+2.28

Roots

51.46+8.87

8.08+1.53

19.93+7.26

1.56+0.71

6.74+2.72

-2

(g DW m )

81.54+3.88

Total

147.25+13.00

27.30+5.22

77.83+3.64

4.69+1.00

25.84+4.39

0.59+0.20

3.98+1.42

-2

(g DW m )

Lipids shoots

7.30+0.39

6.20+0.72

9.23+3.58

6.82+1.25

13.48+2.53

4.61+0.83

18.83

7.85

(% DW)

Lipids roots

2.80+0.76

2.69+1.07

4.50+0.79

3.71+0.07

8.54

3.37+0.52

(% DW)

-1

Organics in Shoots (mg kg DW)

Arochlor-1248

0.61+0.05

14.25B

Σ16-PAHs

0.20+0.16A

2.51+0.15

0.31+0.04A

6.36+5.57

1.73+1.29A

51.87

29.89B

-1

Metals in Shoots (mg kg DW)

Arsenic

0.31+0.45

0.48+0.00

1.68+0.36

0.96+0.09

3.36+1.07

2.38+1.70

1.39+1.96

3.70+1.36

Cadmium

0.59+0.08

0.64+0.13

0.80+0.19

0.41+0.04

2.41+0.35

1.09+0.66

1.85+0.60

1.21+0.09

Chromium

21.55+10.54

7.38+2.57

22.75+6.01

10.11+2.53

35.10+7.07

35.25+11.10

19.55+7.00

31.05+9.26

Copper

13.20+0.99

14.10+0.71

23.85+0.49

24.20+2.97

47.70+4.67

31.10+0.61

42.75+9.40

64.70+5.37

Lead

4.74+1.92

3.81+1.46

20.90+13.01

8.51+1.25

49.70+20.36

33.45+31.04

27.05+8.41

51.90+21.07

Nickel

11.995+5.10

5.82+0.92

12.20+0.28

9.50+0.27

19.15+2.19

15.40+4.53

16.70+3.54

22.95+2.90

Zinc

82.10+19.09

81.55+11.10

197.00+33.94

231.5+30.41

315.50+74.25

278.00+118.79 270.50+84.15

-1

Organics in Roots (mg kg DW)

Arochlor-1248

16.01+6.22

9.21+4.73AB

22.38+21.84

6.10+10.57B

Σ16-PAHs

0.06+0.10A

6.05+1.54

7.14+4.65AB

25.69+11.28

6.40+5.82B

-1

Metals in Roots (mg kg DW)

Arsenic

2.04+0.14

2.40+0.33

2.16+0.52

3.08+0.11

3.53+1.07

3.18+0.42

Cadmium

3.31+0.06

1.84+0.18

2.47+0.16

0.19+0.07

2.83+0.18

0.49+0.19

Chromium

15.20+1.84

30.25+1.48

14.25+3.46

24.50+3.39

59.40+63.07

15.85+3.18

Copper

47.55+5.73

56.65+1.91

73.05+1.63

75.00+2.69

71.80+8.91

68.90+3.96

Lead

8.82+0.09

19.35+12.23

11.62+4.21

34.95+22.42

41.80+29.13

24.80+8.91

Nickel

15.50+0.00

24.60+2.62

17.80+1.70

19.50+2.40

22.25+0.49

19.40+2.55

Zinc

130.5+2.12

162.50+2.12

226.50+2.12

304.50+44.55 406.50+193.04

282.50+24.75

Mean values and standard deviations (biomass N=5, organics N=3; metals N=2). Different letters indicate statistically significant differ-

ences between means at the 95-percent confidence level, according to Fisher's least significant difference procedure.

Abbreviations: IHC, Indiana Harbor Canal; ND, not determined.