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Table 1 Sediment parameters for the disposal and reference areas

From: The impact of harbour sludge disposal on benthic macrofauna communities in the Weser estuary

Survey

Sediment parameter

Significancea

Disposal area (stations I–IV)

Reference area (stations VI–IX)

August 1996, n=4

Silt (%)

 

21.8

17.7

Organic matter (%)

 

5.8

3.8

Median grain size (mm)

 

0.08

0.09

October 1996, n=4

Silt (%)

**

58.0

11.50

Organic matter (%)

**

10.0

3.3

Median grain size (mm)

**

0.06

0.1

April 1997, n=4

Silt (%)

**

43.7

2.7

Organic matter (%)

**

9.5

1.0

Median grain size (mm)

 

0.09

0.10

Overall, n=12

Silt (%)

**

41.1

8.9

Organic matter (%)

**

8.1

2.6

Median grain size (mm)

 

0.08

0.10

  1. aMann-Whitney test; *P<0.1, **P<0.05, ***P<0.01