40
Table 2.3 Estimation of burial rate of organic carbon to marine sediment based on Hedges and Keil (1995) and Schlünz and Schneider (2000)
Sediment type
Hedges and Keil (1995)
Schlünz and Schneider (2000)
Duarte et al. (2005)
(Tg C year
–1
)
Contribution (%) (Tg C year
–1
) Contribution (%)
(Tg C year
–1
) Contribution (%)
Continental shelf and upper slope
sediment (total)
98.9
46
Deltaic sediment
70
44
43.4
31
–
–
High- productivity zones
7
4
Not estimated separately
–
–
Other areas
68
42
55.2
40
–
–
Shallow- water carbonate sediment
6
4
Not estimated separately
–
–
Coastal vegetated habitats
Not included in the estimation
Not included in the estimation
Mangroves
–
–
–
–
23.6
11
Salt marsh
–
–
–
–
60.4
28
Seagrass meadows
–
–
–
–
27.4
13
Pelagic sediment (total)
8.8
6
6.0
3
High- productivity zones
3
2
–
–
–
–
Other areas
5
3
–
–
–
–
Anoxic basins (e.g., Black Sea)
1
1
Not estimated separately
Not estimated separately
Aeolian dust input
Not included in the estimation
32.0
23
Not included in the estimation
Total
160
100
139.4
100
216.3
100
Estimates for coastal vegetated habitats by Duarte et al. (2005) are also shown for comparison
T. Miyajima and M. Hamaguchi