43
0
5 00
1000
0.0 0.5 1.0 1.5
13
C
org
0
5 00
1000
0.0 0.5 1.0 1.5
13
C
org
0
5 00
1000
0.0 0.5 1.0 1.5
13
C
org
Organic C (µmol C g )
Depth (cm)
Dry bulk density (g cm )
0
500
1000
0.0 0.5 1.0 1.5
13
C
org
0
500
1000
0.0 0.5 1.0 1.5
0
50
100
150
200
13
C
org
0
500
1000
0.0 0.5 1.0 1.5
13
C
org
0
500
1000
0.0 0.5 1.0 1.5
13
C
org
a
b
c
d
e
f
g
Organic C
Dry bulk density
13
C of OC
Fig. 2.3 Examples of vertical profiles of OC in seagrass meadow sediment cores up to 200 cm long. The dry bulk density of sediment and the carbon isotope
ratio (δ
13
C) of OC are also shown. Sampling locations: (a) Zostera marina
meadow in the Seto Inland Sea, central Japan; (b) unvegetated area adjacent to the
meadow in (a); (c) another Z. marina
meadow in the Seto Inland Sea; (d) Z. japonica
meadow in the Seto Inland Sea; (e) Cymodocea serrulata-dominated
mixed-species meadow on carbonate sediment of Ishigaki Island, southwestern Japan; (f) Enhalus acoroides
meadow on carbonate sediment of Ishigaki Island;
(g) E. acoroides
meadow near mangroves on the Andaman Sea coast of Thailand. (Data source: Miyajima et al. (2015))
2 Carbon Sequestration in Sediment as an Ecosystem Function of Seagrass Meadows