naa a22 4500 510737595 CHVBK 20180411083016.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1007/s11284-012-1019-4 doi (NATIONALLICENCE)springer-10.1007/s11284-012-1019-4 Determination of the gas exchange phenology in an evergreen coniferous forest from 7years of eddy covariance flux data using an extended big-leaf analysis [Elektronische Daten] [Yoshiko Kosugi, Satoru Takanashi, Masahito Ueyama, Shinjiro Ohkubo, Hiroki Tanaka, Kazuho Matsumoto, Natsuko Yoshifuji, Mioko Ataka, Ayaka Sakabe] We defined gas exchange phenology as the seasonality of the gas exchange characteristics of a forest canopy, and investigated how the gas exchange phenology could be directly detected from an eddy covariance (EC) dataset and its influence on the canopy fluxes within an evergreen Japanese cypress forest. For the detection of gas exchange phenology, we derived three bulk parameters of the extended big-leaf model (Kosugi et al. 2005) inversely from EC flux data over a 7-year period: surface conductance (g c), maximum rate of carboxylation of the "big leaf” (V CMAX), and intercellular CO2 concentration of the "big leaf” (C I). The relationship between g c and the vapor pressure deficit declined in winter and spring. The relationship between the daily ecosystem respiration and air temperature was greater in the spring than in the other seasons. The temperature dependence curve of V CMAX decreased substantially in the winter and was different from that of an evergreen broadleaved forest. A decrease in C I was occasionally coupled with the decrease in canopy gross primary production during April and August, indicating that stomatal closure was responsible for a decline in canopy photosynthesis. Gas exchange phenology should be quantified when understanding the determining factors of the seasonality of canopy fluxes at evergreen coniferous forests. The Ecological Society of Japan, 2013 Evergreen conifer nationallicence Phenology nationallicence Eddy covariance nationallicence Canopy conductance nationallicence V CMAX nationallicence Kosugi Yoshiko Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut Takanashi Satoru Department of Meteorological Environment, Forestry and Forest Products Research Institute, 305-8687, Tsukuba, Ibaraki, Japan aut Ueyama Masahito Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 599-8351, Sakai, Osaka, Japan aut Ohkubo Shinjiro NARO Hokkaido Agricultural Research Center, 062-8555, Sapporo, Japan aut Tanaka Hiroki Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut Matsumoto Kazuho Faculty of Agriculture, University of the Ryukyus, 903-0213, Okinawa, Japan aut Yoshifuji Natsuko Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut Ataka Mioko Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut Sakabe Ayaka Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut Ecological Research Springer Japan 28/3(2013-05-01), 373-385 0912-3814 28:3<373 2013 28 11284 https://doi.org/10.1007/s11284-012-1019-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-012-1019-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kosugi Yoshiko Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut NATIONALLICENCE 700 1- Takanashi Satoru Department of Meteorological Environment, Forestry and Forest Products Research Institute, 305-8687, Tsukuba, Ibaraki, Japan aut NATIONALLICENCE 700 1- Ueyama Masahito Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 599-8351, Sakai, Osaka, Japan aut NATIONALLICENCE 700 1- Ohkubo Shinjiro NARO Hokkaido Agricultural Research Center, 062-8555, Sapporo, Japan aut NATIONALLICENCE 700 1- Tanaka Hiroki Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut NATIONALLICENCE 700 1- Matsumoto Kazuho Faculty of Agriculture, University of the Ryukyus, 903-0213, Okinawa, Japan aut NATIONALLICENCE 700 1- Yoshifuji Natsuko Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut NATIONALLICENCE 700 1- Ataka Mioko Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut NATIONALLICENCE 700 1- Sakabe Ayaka Laboratory of Forest Hydrology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/3(2013-05-01), 373-385 0912-3814 28:3<373 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer