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Table 2 CNP stoichiometry of particulate and dissolved organic matter

From: C:N:P stoichiometry of particulate and dissolved organic matter in river waters and changes during decomposition

Total organic matter

 

TOC

TON

TOP

C:N

N(%)

C:P

P(%)

N:P

Mean

4430

1667

63

3.10

17

181

0.64

59

Median

3980

1560

39

2.98

18

263

0.44

89

SD

2920

984

84

3.46

15

90

1.29

26

Total organic matter after 20 days decomposition

 

TOC

TON

TOP

C:N

N(%)

C:P

P(%)

N:P

Mean

3080

894

38

4.02

13

209

0.56

52

Median

2970

1030

26

3.37

16

295

0.39

88

SD

1220

337

47

4.22

12

67

1.73

16

Particulate organic matter

 

POC

PON

POP

C:N

N(%)

C:P

P(%)

N:P

Mean

1750

864

50

2.36

22

90

1.29

38

Median

1350

680

29

2.32

23

120

0.97

52

SD

2180

592

78

4.30

12

72

1.61

17

Labile particulate organic matter

 

LPOC

LPON

LPOP

C:N

N(%)

C:P

P(%)

N:P

Mean

710

447

17

1.85

28

108

1.08

58

Median

460

310

9

1.73

30

132

0.88

76

SD

1290

382

27

3.94

13

123

0.94

31

Recalcitrant particulate organic matter

 

RPOC

RPON

RPOP

C:N

N(%)

C:P

P(%)

N:P

Mean

930

407

33

2.67

20

73

1.60

27

Median

690

240

17

3.36

16

105

1.11

31

SD

1150

455

55

2.95

18

54

2.15

18

Dissolved organic matter

 

DOC

DON

DOP

C:N

N(%)

C:P

P(%)

N:P

Mean

2680

838

13

3.73

14

532

0.22

143

Median

2280

780

8

3.41

15

735

0.16

216

SD

1350

793

21

1.99

26

166

0.70

84

Labile dissolved organic matter

 

LDOC

LDON

LDOP

C:N

N(%)

C:P

P(%)

N:P

Mean

640

326

8

2.29

23

206

0.56

90

Median

550

220

4

2.92

18

355

0.33

122

SD

410

281

10

1.70

31

106

1.10

62

Recalcitrant dissolved organic matter

 

RDOC

RDON

RDOP

C:N

N(%)

C:P

P(%)

N:P

Mean

1800

511

5

4.11

13

929

0.13

226

Median

1540

410

4

4.38

12

993

0.12

227

SD

970

703

4

1.61

33

626

0.19

389

  1. Concentrations (mg m−3) of total organic carbon (TOC), total organic nitrogen (TON), and total organic phosphorus (TOP); POC, DOC, POP, DOP, PON, and DON, and their labile and recalcitrant fractions in the studied rivers (n = 197)