TY - JOUR
T1 - Stand-scale transpiration estimates in a Moso bamboo forest
T2 - (I) Applicability of sap flux measurements
AU - Kume, Tomonori
AU - Onozawa, Yuka
AU - Komatsu, Hikaru
AU - Tsuruta, Kenji
AU - Shinohara, Yoshinori
AU - Umebayashi, Toshihiro
AU - Otsuki, Kyoichi
N1 - Funding Information:
This work was supported by Grants-in-Aid for Scientific Research from the Japan Society for Promotion of Science (#21380098). We sincerely thank Ms. Shoko Ikezaki (Kyushu University/Minamata City Government), Mr. Kohei Kuramoto, and Mr. Daisuke Notomi (Kyushu University) for their cooperation in our work at the Kaguya site, Kyushu University. We appreciate fruitful discussions with Prof. Tomo’omi Kumagai (Kyushu University) and Prof. Shigeru Ogawa (Fukuoka Institute of Technology).
PY - 2010/9
Y1 - 2010/9
N2 - The applicability of sap flux (Fd) measurements to bamboo forests has not been studied. This study was undertaken to establish an optimal and effective design for stand-scale transpiration (E) estimates in a Moso bamboo forest. To this aim, we validated Fd measurements in Moso bamboos in a cut bamboo experiment. In addition, we analyzed how sample sizes affect the reliability of E estimates calculated from Fd and conducting culm area (AS_b). In the cut bamboo experiments, we found that Fd measurement using a 10mm probe was a valid means of determining the water-use behavior of a Moso bamboo, although a specific correction was needed. Furthermore, we calculated E from stand AS_b (AS_stand) and mean stand Fd (JS). Employing Monte Carlo analysis, we examined potential errors associated with sample size in E, AS_stand, and JS using an original dataset with AS_b and Fd measured for 40 and 16 individuals, respectively. Consequently, we determined the optimal sample size for both AS_stand and JS estimates as 11. The optimal sample sizes for JS were almost the same under different vapor pressure deficit and soil moisture conditions. The optimal sample size for JS at the study site was less than that of a coniferous plantation in the same region probably owing to small individual-to-individual variations in sap flux in the Moso bamboo forest. Our study concludes that sap flux measurements are an applicable technique for assessing water use in Moso bamboo forests.
AB - The applicability of sap flux (Fd) measurements to bamboo forests has not been studied. This study was undertaken to establish an optimal and effective design for stand-scale transpiration (E) estimates in a Moso bamboo forest. To this aim, we validated Fd measurements in Moso bamboos in a cut bamboo experiment. In addition, we analyzed how sample sizes affect the reliability of E estimates calculated from Fd and conducting culm area (AS_b). In the cut bamboo experiments, we found that Fd measurement using a 10mm probe was a valid means of determining the water-use behavior of a Moso bamboo, although a specific correction was needed. Furthermore, we calculated E from stand AS_b (AS_stand) and mean stand Fd (JS). Employing Monte Carlo analysis, we examined potential errors associated with sample size in E, AS_stand, and JS using an original dataset with AS_b and Fd measured for 40 and 16 individuals, respectively. Consequently, we determined the optimal sample size for both AS_stand and JS estimates as 11. The optimal sample sizes for JS were almost the same under different vapor pressure deficit and soil moisture conditions. The optimal sample size for JS at the study site was less than that of a coniferous plantation in the same region probably owing to small individual-to-individual variations in sap flux in the Moso bamboo forest. Our study concludes that sap flux measurements are an applicable technique for assessing water use in Moso bamboo forests.
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U2 - 10.1016/j.foreco.2010.07.012
DO - 10.1016/j.foreco.2010.07.012
M3 - Article
AN - SCOPUS:77956431124
SN - 0378-1127
VL - 260
SP - 1287
EP - 1294
JO - Forest Ecology and Management
JF - Forest Ecology and Management
IS - 8
ER -