naa a22 4500 510738079 CHVBK 20180411083018.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11284-012-1013-x doi (NATIONALLICENCE)springer-10.1007/s11284-012-1013-x Separation of root and heterotrophic respiration within soil respiration by trenching, root biomass regression, and root excising methods in a cool-temperate deciduous forest in Japan [Elektronische Daten] [Mitsutoshi Tomotsune, Shinpei Yoshitake, Shinya Watanabe, Hiroshi Koizumi] Trenching (Tr), root biomass regression (RR), and root excising (RE) methods were used to estimate the contribution of root (RR) and heterotrophic (HR) respiration to soil respiration (SR) in a cool-temperate deciduous forest in central Japan. The contribution ratios of RR to SR were 23% (−16 to 46%), 11% (−19 to 61%), and 115% (20 to 393%), as estimated by the Tr, RR, and RE methods, respectively. The contribution ratio showed clear seasonal variation with high values in summer for the Tr method, while they were undetectable for the RR and RE methods because of some methodological problems. These results suggest the Tr method is the best of the three methods used to estimate the contribution ratio of RR and HR to SR in the forest. Annual SR, RR, and HR rates, estimated by the Tr method, were 479, 369, 110gCm−2year−1, respectively. The seasonal variation of SR was mainly influenced by HR (77%) throughout the year, while the influence of RR on SR was strongest in summer (46%). This effect occurred because RR (Q 10=7.5) is more sensitive to temperature than HR (Q 10=3.2). Also, the contribution of fine RR to total RR was higher than that of coarse RR because of high respiratory activity (Q 10 and R 10) as well as the large biomass of fine roots. These results suggest that each component of SR responds differently to the same environmental factors and their relative influence on SR changes across the seasons. The Ecological Society of Japan, 2012 Carbon cycle nationallicence Fine root nationallicence Q 10 value nationallicence Quercus serrata nationallicence Seasonal variation nationallicence Tomotsune Mitsutoshi Faculty of Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut Yoshitake Shinpei Faculty of Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut Watanabe Shinya Faculty of Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut Koizumi Hiroshi Faculty of Education and Integrated Arts and Sciences, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut Ecological Research Springer Japan 28/2(2013-03-01), 259-269 0912-3814 28:2<259 2013 28 11284 https://doi.org/10.1007/s11284-012-1013-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-012-1013-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tomotsune Mitsutoshi Faculty of Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut NATIONALLICENCE 700 1- Yoshitake Shinpei Faculty of Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut NATIONALLICENCE 700 1- Watanabe Shinya Faculty of Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut NATIONALLICENCE 700 1- Koizumi Hiroshi Faculty of Education and Integrated Arts and Sciences, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, 162-8480, Tokyo, Japan aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/2(2013-03-01), 259-269 0912-3814 28:2<259 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer