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Yoshiaki Tsuda
Laboratory of Forest Ecosystem Studies, Department of Ecosystem Studies, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku,Tokyo, Japan
S. Goto
University Forest in Hokkaido, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yamabe, Furano,Hokkaido, Japan
Y. Ide
Laboratory of Forest Ecosystem Studies, Department of Ecosystem Studies, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku,Tokyo, Japan