naa a22 4500 510738141 CHVBK 20180411083018.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11284-012-1024-7 doi (NATIONALLICENCE)springer-10.1007/s11284-012-1024-7 Possible ideas on carbon and nitrogen trophic fractionation of food chains: a new aspect of food-chain stable isotope analysis in Lake Biwa, Lake Baikal, and the Mongolian grasslands [Elektronische Daten] [Eitaro Wada, Reiichiro Ishii, Maki Aita, Nanako Ogawa, Ayato Kohzu, Fujio Hyodo, Yoshihiro Yamada] Trophic fractionation of carbon and nitrogen isotopes (Δδ13C, Δδ15N) was examined using previously complied databases for food chains in Lake Biwa, Lake Baikal, and Mongolian grassland. The following two features were clarified: (1) For each ecosystem, the ratios of trophic fractionation of carbon and nitrogen isotopes (Δδ15N/Δδ13C) throughout food chain could be obtained as the slope of linear regression line on the δ15N-δ13C plot. (2) Further, analysis of covariance (ANCOVA) revealed the slopes on δ15N-δ13C were not significantly different among these various ecosystems and allowed us to have the regression by setting δ15N as the response variable: δ15N=1.61 δ13C+[ecosystem specific constant] with standard errors of [±0.41] and [±9.7] for the slope and the intercept, respectively. It was suggested that the slope of the regression (or the ratio Δδ15N/Δδ13C) could be applicable to more complicated food webs in case nitrogen and carbon isotope ratios of primary producers can be assumed constant in space and time within the ecosystems. The results from simple linear regression analyses coincided well with the ANCOVA results for these ecosystems, although there was some discrepancy between the results of the two statistical analyses. Possible factors that govern the linear relationship between δ15N and δ13C along a food chain are discussed together with a new scope for the stable isotope food chain analyses. The Ecological Society of Japan, 2013 Δ15N-δ13C relationship nationallicence Food chain nationallicence Lake Biwa nationallicence Lake Baikal nationallicence Mongolian grassland nationallicence Wada Eitaro Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Kanagawa, Japan aut Ishii Reiichiro Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Kanagawa, Japan aut Aita Maki Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Kanagawa, Japan aut Ogawa Nanako Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, 237-0061, Yokosuka, Kanagawa, Japan aut Kohzu Ayato Center for Regional Environmental Research Division, National Institute for Environmental Studies, 16-2 Onogawa, 305-8506, Tsukuba, Ibaraki, Japan aut Hyodo Fujio Research Core for Interdisciplinary Sciences, Okayama University, 3-1-1 Tsushimanaka, 700-8530, Okayama, Japan aut Yamada Yoshihiro Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, 761-0795, Kagawa, Japan aut Ecological Research Springer Japan 28/2(2013-03-01), 173-181 0912-3814 28:2<173 2013 28 11284 https://doi.org/10.1007/s11284-012-1024-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-012-1024-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wada Eitaro Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Kanagawa, Japan aut NATIONALLICENCE 700 1- Ishii Reiichiro Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Kanagawa, Japan aut NATIONALLICENCE 700 1- Aita Maki Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, 236-0001, Yokohama, Kanagawa, Japan aut NATIONALLICENCE 700 1- Ogawa Nanako Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, 237-0061, Yokosuka, Kanagawa, Japan aut NATIONALLICENCE 700 1- Kohzu Ayato Center for Regional Environmental Research Division, National Institute for Environmental Studies, 16-2 Onogawa, 305-8506, Tsukuba, Ibaraki, Japan aut NATIONALLICENCE 700 1- Hyodo Fujio Research Core for Interdisciplinary Sciences, Okayama University, 3-1-1 Tsushimanaka, 700-8530, Okayama, Japan aut NATIONALLICENCE 700 1- Yamada Yoshihiro Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, 761-0795, Kagawa, Japan aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/2(2013-03-01), 173-181 0912-3814 28:2<173 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer