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Average nitrogen concentrations NOx-N (µg l-1) and yearly median for each estuary, July-August 1999 (JA99) to May--June 2000 (MJ00), by bioregion and sampling event

Sample

Median

Bioregion

Estuary

JA99

SO99

ND99

JF00

MA00

MJ00

(JA99-MJ00)

Boags

East Inlet

5

3

1

1

2

3

2

Port Sorell

217

5

0

2

4

11

4

Little Musselroe River

16

24

1

2

1

13

4

Mersey River

289

65

19

24

22

61

31

Black River

95

62

48

24

48

55

57

Don River

1,125

328

20

5

31

343

118

Duck Bay

289

268

165

39

93

235

127

Boobyalla Inlet

250

277

132

72

18

158

138

Bruny

Cloudy Bay

7

4

0

2

1

13

1

Browns River

332

8

3

1

1

10

5

Davey

Cockle Creek

22

5

1

1

1

7

2

Catamaran River

13

9

0

1

6

9

5

Franklin

Nelson Bay River

13

7

8

2

3

8

7

Arthur River

39

17

10

5

9

20

13

Pieman River

28

22

36

20

21

19

23

Freycinet

Little Swanport

3

1

0

0

0

2

0

Grants Lagoon

17

3

0

1

2

38

1

Great Swanport

0

2

0

2

1

0

1

Ansons Bay

5

4

1

14

2

3

2

Earlham Lagoon

28

1

1

5

1

2

2

Meredith River

124

6

1

56

3

6

6

Douglas River

11

0

11

178

75

62

24

  1. Generally, n=6 for sample and n=36 for median
     

  2. Draft indicator levels for nutrients (nitrogen) in Tasmanian estuaries:
     

low

medium

high

very high

0.0 to 20

21 to 50

51 to 100

>100

Source: Murphy et. al., in preparation


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Last Modified: 14 Dec 2006
URL: http://soer.justice.tas.gov.au/2003/table/212/index.php
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