TY - JOUR
T1 - An estimation of CO2 fixation capacity in mangrove forest using two methods of CO2 gas exchange and growth curve analysis
AU - Okimoto, Yosuke
AU - Nose, Akihiro
AU - Ikeda, Keizo
AU - Agarie, Sakae
AU - Oshima, Kenzo
AU - Tateda, Yutaka
AU - Ishii, Takashi
AU - Nhan, Dang D.
N1 - Funding Information:
Acknowledgement This work was partly supported by the research of CO2 sequestration and collection technology funded by New Energy and Industrial Technology Development Organization and Research Institute of Innovative Technology for the Earth. The assistance of M. Kinoshita, Y. Mizoguchi, and H. Toyonaga at various stages of the study are acknowledged.
PY - 2008/4
Y1 - 2008/4
N2 - In many coastal areas of South-East Asia, attempts have been made to revive coastal ecosystem by initiating projects that encourage planting of mangrove trees. Compared to the terrestrial trees, mangrove trees possess a higher carbon fixation capacity. It becomes a very significant option for clean development mechanism (CDM) program. However, a reliable method to estimate CO2 fixation capacity of mangrove trees has not been established. Acknowledging the above fact, we decided to set up an estimation method for the CDM program, using gas exchange analysis to estimate mangrove productivity, we put into consideration the net CO2 fixation of reforested Kandelia candel (5-, 10-, and 15-year-old stand). This was estimated by gas exchange analysis and growth curve analysis. In growth curve analysis, we drew a growth curve of a single stand using data of above- and below-ground biomass. In the gas exchange analysis, we calculated CO2 fixation capacity by (1) measuring respiration rate of each organ of stand and calculating respiratory CO 2 emission from above- to below-ground biomass. (2) Measuring the single-leaf photosynthetic rate in response to light intensity and calculating the photosynthetic CO2 absorption. (3) We also developed a model for the diurnal changes in temperature, and monthly averages based on one-day estimation of CO2 absorption and emission, which we corrected by this model in order to estimate the net CO2 fixation capacity in response to temperature. Comparing the biomass accumulation of the two methods constructed for the same forest, the above-ground biomass accumulation of 10-year-old forest (34.3 ton ha-1 yr-1) estimated by gas exchange analysis was closely compared to those of growth curve analysis (26.6 ton ha-1 yr-1), suggesting that the gas exchange analysis was capable of estimating mangrove productivity. The validity of the estimated CO2 fixation capacity by the gas exchange analysis and the growth curve analysis was also discussed.
AB - In many coastal areas of South-East Asia, attempts have been made to revive coastal ecosystem by initiating projects that encourage planting of mangrove trees. Compared to the terrestrial trees, mangrove trees possess a higher carbon fixation capacity. It becomes a very significant option for clean development mechanism (CDM) program. However, a reliable method to estimate CO2 fixation capacity of mangrove trees has not been established. Acknowledging the above fact, we decided to set up an estimation method for the CDM program, using gas exchange analysis to estimate mangrove productivity, we put into consideration the net CO2 fixation of reforested Kandelia candel (5-, 10-, and 15-year-old stand). This was estimated by gas exchange analysis and growth curve analysis. In growth curve analysis, we drew a growth curve of a single stand using data of above- and below-ground biomass. In the gas exchange analysis, we calculated CO2 fixation capacity by (1) measuring respiration rate of each organ of stand and calculating respiratory CO 2 emission from above- to below-ground biomass. (2) Measuring the single-leaf photosynthetic rate in response to light intensity and calculating the photosynthetic CO2 absorption. (3) We also developed a model for the diurnal changes in temperature, and monthly averages based on one-day estimation of CO2 absorption and emission, which we corrected by this model in order to estimate the net CO2 fixation capacity in response to temperature. Comparing the biomass accumulation of the two methods constructed for the same forest, the above-ground biomass accumulation of 10-year-old forest (34.3 ton ha-1 yr-1) estimated by gas exchange analysis was closely compared to those of growth curve analysis (26.6 ton ha-1 yr-1), suggesting that the gas exchange analysis was capable of estimating mangrove productivity. The validity of the estimated CO2 fixation capacity by the gas exchange analysis and the growth curve analysis was also discussed.
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U2 - 10.1007/s11273-007-9062-6
DO - 10.1007/s11273-007-9062-6
M3 - Article
AN - SCOPUS:40049108956
SN - 0923-4861
VL - 16
SP - 155
EP - 171
JO - Wetlands Ecology and Management
JF - Wetlands Ecology and Management
IS - 2
ER -
