Abstract
The variation in CO2 flux from the forest floor is important in understanding the role of mangrove forests as a carbon sink. To clarify the effects of soil temperature and tidal conditions on variation in CO2 flux, sediment-atmosphere CO2 fluxes were measured between June 2012 and May 2013. We used the closed chamber method for two plots, with a 0.5 m difference in elevation (B, high elevation; R-B, low elevation), in a mangrove forest in south-western Japan. CO2 fluxes were highest in the warm season and showed a weak positive correlation with soil temperature in both forests. Estimated monthly CO2 flux showed moderate seasonal variation in accordance with the exposure duration of the soil surface under tidal fluctuation. Additionally, measured CO2 flux and soil temperature were slightly higher in the R-B plot than the B plot, although estimated annual CO2 flux was higher in the B plot than the R-B plot due to different exposure durations. These results suggest that variation in the exposure duration of the forest floor, which changes seasonally and microgeographically, is important in evaluating the annual CO2 flux at a local scale and understanding the role of mangrove ecosystems as regulators of atmospheric CO2.
| Original language | English |
|---|---|
| Pages (from-to) | 268-275 |
| Number of pages | 8 |
| Journal | Journal of Tropical Ecology |
| Volume | 34 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2018 Jul 1 |
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Keywords
- Bruguiera gymnorrhiza
- coastal ecosystem
- decomposition
- Rhizophora mucronata
- seasonality
- soil organic matter
- soil respiration
- soil temperature
- tidal fluctuation
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
Cite this
Effects of soil temperature and tidal condition on variation in carbon dioxide flux from soil sediment in a subtropical mangrove forest. / Tomotsune, Mitsutoshi; Yoshitake, Shimpei; Iimura, Yasuo; Kida, Morimaru; Fujitake, Nobuhide; Koizumi, Hiroshi; Ohtsuka, Toshiyuki.
In: Journal of Tropical Ecology, Vol. 34, No. 4, 01.07.2018, p. 268-275.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of soil temperature and tidal condition on variation in carbon dioxide flux from soil sediment in a subtropical mangrove forest
AU - Tomotsune, Mitsutoshi
AU - Yoshitake, Shimpei
AU - Iimura, Yasuo
AU - Kida, Morimaru
AU - Fujitake, Nobuhide
AU - Koizumi, Hiroshi
AU - Ohtsuka, Toshiyuki
PY - 2018/7/1
Y1 - 2018/7/1
N2 - The variation in CO2 flux from the forest floor is important in understanding the role of mangrove forests as a carbon sink. To clarify the effects of soil temperature and tidal conditions on variation in CO2 flux, sediment-atmosphere CO2 fluxes were measured between June 2012 and May 2013. We used the closed chamber method for two plots, with a 0.5 m difference in elevation (B, high elevation; R-B, low elevation), in a mangrove forest in south-western Japan. CO2 fluxes were highest in the warm season and showed a weak positive correlation with soil temperature in both forests. Estimated monthly CO2 flux showed moderate seasonal variation in accordance with the exposure duration of the soil surface under tidal fluctuation. Additionally, measured CO2 flux and soil temperature were slightly higher in the R-B plot than the B plot, although estimated annual CO2 flux was higher in the B plot than the R-B plot due to different exposure durations. These results suggest that variation in the exposure duration of the forest floor, which changes seasonally and microgeographically, is important in evaluating the annual CO2 flux at a local scale and understanding the role of mangrove ecosystems as regulators of atmospheric CO2.
AB - The variation in CO2 flux from the forest floor is important in understanding the role of mangrove forests as a carbon sink. To clarify the effects of soil temperature and tidal conditions on variation in CO2 flux, sediment-atmosphere CO2 fluxes were measured between June 2012 and May 2013. We used the closed chamber method for two plots, with a 0.5 m difference in elevation (B, high elevation; R-B, low elevation), in a mangrove forest in south-western Japan. CO2 fluxes were highest in the warm season and showed a weak positive correlation with soil temperature in both forests. Estimated monthly CO2 flux showed moderate seasonal variation in accordance with the exposure duration of the soil surface under tidal fluctuation. Additionally, measured CO2 flux and soil temperature were slightly higher in the R-B plot than the B plot, although estimated annual CO2 flux was higher in the B plot than the R-B plot due to different exposure durations. These results suggest that variation in the exposure duration of the forest floor, which changes seasonally and microgeographically, is important in evaluating the annual CO2 flux at a local scale and understanding the role of mangrove ecosystems as regulators of atmospheric CO2.
KW - Bruguiera gymnorrhiza
KW - coastal ecosystem
KW - decomposition
KW - Rhizophora mucronata
KW - seasonality
KW - soil organic matter
KW - soil respiration
KW - soil temperature
KW - tidal fluctuation
UR - http://www.scopus.com/inward/record.url?scp=85050780376&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050780376&partnerID=8YFLogxK
U2 - 10.1017/S026646741800024X
DO - 10.1017/S026646741800024X
M3 - Article
AN - SCOPUS:85050780376
VL - 34
SP - 268
EP - 275
JO - Journal of Tropical Ecology
JF - Journal of Tropical Ecology
SN - 0266-4674
IS - 4
ER -