Methane
Methane
Methane is the one of the major global-warming gas. Global Warnming Potential (GWP) is 21.
Methane emissions
Methane flux and vegetation types in grassy marshlands near Kolyma River, northern Siberia
Table 2. Mean values with standard error of each environmental factor in each cluster group. The different letters upper-right the mean values indicate significantly different at P < 0.01 (Tukey's HSD test). Except for the measurement of pH, EC, Eh and thaw depth in cluster group 1 where we did not measure in four plots, sample numbers are coincidence with number of plots clustered by TWINSPAN (Table 1). On water depth, minus value indicates the depth of soil where the ground water appeared. (Tsuyuzaki et al. 2001)
| Grassland type | Eriophorum grassland | Horsetail grassland | Carex grassland | All plots |
|---|---|---|---|---|
| Water depth (cm) | -5.1 ± 0.8a | 5.2 ± 0.3b | 5.4 ± 0.5b | 2.90 ± 0.6 |
| pH | 5.75 ± 0.04a | 6.15 ± 0.03b | 6.25 ± 0.01c | 6.08 ± 0.03 |
| Air temperature (°C) | 18.8 ± 0.9 | 17.0 ± 1.0 | 17.4 ± 0.3 | 17.5 ± 0.6 |
| EC (mS/m) | 5.20 ± 0.29a | 8.86 ± 0.30b | 6.61 ± 0.13c | 7.64 ± 0.26 |
| Eh (mV) | 451.4 ± 7.8a | 455.7 ± 2.0a | 454.9 ± 1.2a | 454.6 ± 2.2 |
| Soil humidity (%) | 49.8 ± 2.3a | 63.8 ± 1.4b | 55.5 ± 1.0a | 58.6 ± 1.2 |
| Thaw depth (cm) | 39.7 ± 0.8a | 69.4 ± 3.2b | 59.4 ± 0.4b | 59.8 ± 2.5 |
| Elevation difference (cm) | 7.6 ± 0.8a | 10.1 ± 0.4a | 14.7 ± 0.9b | 10.2 ± 0.4 |
| Methane flux (mg CH4/m2/d) | -1.9 ± 1.6a | 165.5 ± 6.8b | 73.2 ± 4.9c | 105.1 ± 9.5 |
It may be possible that terrestial plants emit methane under aerobic conditions that has not been mentioned (Keppler et al. 2006).
References
- Keppler F, Hamilton HTG, Brass M & Roeckmann T. 2006. Methane emissions from terrestrial plants under aerobic conditions. Nature 439: 187-191
- Tolmachev AN. 1974. Opredeliteil' viswix raastenii Yakutii (Key to Vascular plants of the Yakutia). Nauka, Novosibirsk (in Russia) 543 pp.
- Tsuyuzaki, S., Nakayama, T., Kuniyoshi, S. & Fukuda, M. 2001. Methane flux and vegetation types in grassy marshlands near Kolyma River, northern Siberia. Soil Biology and Biochemistry 33: 1419-1423
- Introduction to the Ozone Depletion and the Effects of UV Radiation (自然環境学特論)
- Wetland