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Table 2 Studies reporting above ground carbon stocks (AGC) across Africa, some also reporting other carbon pools

From: The effects of seaward distance on above and below ground carbon stocks in estuarine mangrove ecosystems

Location

Authors

Annual rainfall

Seaward Distance reported?

Stem density (stems ha−1)

Basal area (m2 ha−1)

No. species

No. plots sampled

Plot size/shape

Minimum DBH

AGB Equation used (H = height used in equation)

Soil depth sampled

No. of soil samples

AGC (Mg C ha-1)

BGC (Mg C ha-1)

SOC (Mg C ha-1)

SOC method

Observations

Africa

Fatoyimbo & Simard (2013)

–

N

–

–

–

–

–

–

Mutlispecies (H) (Saenger and Snedaker, 1993)

–

–

54.52*

–

–

 

radar/lidar integration study

Cameroon

Ajonina et al. 2014

3000–4000 mm

N

3256

25.1

5

3 subplots × 5 PSP

20 × 10 m/1 × 1 m

>1 cm/< 1 cm

Genus specific (Ajonina et al. 2008)

1 m

60

237.35*

119.34*

–

  

Democratic Republic of the Congo

Ajonina et al. 2014

772 mm

N

1267

24.5

2

3 subplots × 3 PSP

20 × 10 m/1 × 1 m

> 1 cm/< 1 cm

Genus specific (Ajonina et al. 2008)

1 m

36

192.23*

72.15*

–

  

Gabon

Ajonina et al. 2014

2500–3000 mm

N

1467

24.5

8

3 subplots × 4 PSP

20 × 10 m/1 × 1 m

> 1 cm/< 1 cm

Genus specific (Ajonina et al. 2008)

1 m

48

160.27*

58.89*

–

  

Gabon North

Kauffman & Bhomia, 2017

2883 mm

N

–

–

–

6 plots × 7 sites

7 m radius, 2 m radius

> 5 cm, < 5 cm

Genus specific (Fromard et al. 1998)

~1 m

42

36–380

–

345

dry combustion method (induction furnace)

 

Gabon South

Kauffman & Bhomia, 2017

1818 mm

N

< 1000

–

–

6 plots × 10 sites

7 m radius, 2 m radius

> 5 cm, < 5 cm

Genus specific (Fromard et al. 1998)

~1 m

60

3–313

–

191

dry combustion method (induction furnace)

 

Guinea-Bissau

Carreiras, et al. 2012

–

N

–

–

3

16

20 m, 14 m, 4 m radius concentric

> 50 cm, > 20 cm, > 5 cm

A. germinans, L. racemosa (Fromard et al.1998); R. mangle (Imbert and Rollet, 1989)

–

–

26.39*

–

–

 

Remote sensing study

Kenya

Gress et al. 2017

–

Y

–

–

3

77

10 × 10 m

–

–

2.5 m

 

–

–

1224

Oven dried

 

Kenya

Cohen et al. 2013

–

N

–

–

7

337 trees

harvest data

n/a

Species specific and multispecies

–

–

35.04–96*

–

–

  

Liberia

Kauffman & Bhomia, 2017

3346 mm

N

–

–

–

6 plots × 10 sites

7 m radius, 2 m radius

> 5 cm, < 5 cm

Genus specific (Fromard et al. 1998)

~1 m

60

5–162

–

342

dry combustion method (induction furnace)

 

Madagascar

Jones et al. 2014

–

N

1250-5600

–

8

56

10 × 10 m and 20 × 20 m

5 cm

A. marina (Clough & Scott, 1989); B. gymnorrhiza (leaves), C. tagal, H. littoralis (leaves), R. mucronata (Comley & McGuinness, 2005); B. gymnorrhiza (stem, H), H. littoralis (stem, H), L. racemosa, S. alba (H), R. mucronata (stem, H), X. granatum (H) (Kauffman & Cole, 2010)

1.5 m

50

20.8–146.8

–

324-517

  

Mozambique

Fatoyinbo et al. 2017

  

2036

–

8

25

0.0154 ha, 2 m radius

> 5 cm, < 5 cm

Njana et al. (H)

–

–

95.41*

–

–

 

radar/lidar integration study

Mozambique

Sitoe et al. 2014

–

N

–

–

6

55, 31 trees felled

7 m radius

> 5 cm

Multispecies (Sitoe et al. 2014)

1 m

55

28.02

25.22

160

Walkley–Black wet oxidation method

 

Mozanbique

Stringer et al. 2015

1000–1400 mm

N

–

–

9

6 subplots × 12 plots

7 m, 2 m radius

> 5 cm, < 5 cm and h > 1.3 m

Multispecies (Komiyama et al. 2005, 2008)

2 m

72

25.85–113.2*

8.80-26.94*

274.6-314.1

Oven dried weight

 

Republic of Congo

Ajonina et al. 2014

2500–3000 mm

N

1667

18.8

2

3 subplots × 3 PSP

20 × 10 m/1 × 1 m

> 1 × cm/< 1 cm

Genus specific (Ajonina et al. 2008)

1 m

36

117.97*

47.58*

–

  

Senegal

Kauffman & Bhomia, 2017

650 mm

N

35,000

–

–

6 plots × 6 sites

7 m radius, 2 m radius

> 5 cm, < 5 cm

Genus specific (Fromard et al. 1998)

~1 m

36

11–122

–

240

dry combustion method (induction furnace)

 

Tanzania

Njana et al. 2017

879–1240 mm

N

3662–4947

10.8–13.3

9

88

15 m radius concentric plots

> 1 and min height 2 m

Mulitspecies and species scpecific for Avicennia marina, Sonneratia alba and Rhizophora mucronata (Njana et al. 2016)

–

–

33.5

30.5

–

  

Tanzania

Lupembe 2014

750–1250 mm

N

729

18.3

8

59 plots, 50 trees felled

20 m × 40 m

> 5 cm

Multi species (Lupembe 201)6

60 cm

50

40.5

21.08

98.57

Walkley–Black wet oxidation method

 

Tanzania

This study

1200 mm

Y

717

8.82

7

5

100 m × 100 m

> 5 cm

Multipspecies (Njana et al. 2016)

1 m

20

26.84

25.79

301.69

Walkley–Black wet oxidation method

 
  1. AGC: above ground carbon; BGC: below ground carbon (e.g. roots), SOC: soil organic carbon
  2. *Signifies that values have been computed from above ground biomass values (AGB, Mg dry mass ha−1) to carbon (Mg C ha−1) using the carbon fraction of 0.47 (Kauffman and Donato [59])
  3. Studies on only SOC as reviewed in Twilley et al. [31] were not included in this review