Table 3: A comparison of 13C, 15N in TOM in surficial sediment layer and estimated terrigenous carbon contribution (TC, %) to the marine coastal environment in Asian region.
Site |
TOM, % |
TN, % |
C:N |
d13C, ‰ |
d15N, ‰ |
TC, % |
References |
Yangtze River estuary, China |
na |
na |
na |
-28.9 to -24.3 |
2.7-4.5 |
nd |
[48] |
Ganga River, Bangladesh |
na |
na |
na |
-22.4 to -20.0 |
nd |
Dominant |
[59] |
Ayeyarwady and Salween Rivers estuary, Myanmar |
0.07-2.66 |
0.01-0.2 |
2.7-14.5 |
-26.4 to -21.9 |
3.3-5.4 |
< 40 to > 90 |
[16] |
Pearl River estuary, South China |
6.8-15.2 |
-25 to -21 |
nd |
nd |
[60] |
||
Bo Hai Bay, China |
1.0-7.5 |
0.1-0.2 |
15-42 |
-26 to -19 |
4-14 |
38 |
[61] |
Ha Long Bay, Vietnam |
0.5-4.4 |
0.04-0.13 |
6.8-30.4 |
-26.5 to -24.6 |
4.55-5.56 |
65-92 |
This study |
Ha Long Bay* (center), Vietnam |
2.18 |
0.01 |
20 |
-20.73 |
4.15 |
nd |
[39] |
*Sediment at 11-13 cm depth from surface; na: Not Analyzed; nd: Not Determined.