naa a22 4500 510737951 CHVBK 20180411083017.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11284-012-0934-8 doi (NATIONALLICENCE)springer-10.1007/s11284-012-0934-8 Patterns of foliar δ15N and their control in Eastern Asian forests [Elektronische Daten] [Yunting Fang, Keisuke Koba, Muneoki Yoh, Akiko Makabe, Xueyan Liu] Foliar δ15N has been used increasingly in research on ecosystem nitrogen (N) cycling, because it can serve as an integrator of ecosystem N cycling and thus has a potential to reveal temporal and spatial patterns of N cycling as well as how the N cycle is altered by disturbances. However, the current understanding on controls of foliar δ15N is based principally on studies from America, Europe, Australia and Africa. Here we compiled data from 65 forests at 33 sites across East Asia to explore regional patterns and what controls foliar δ15N by linking it to climate, species composition, soil depth, slope position, N deposition, and soil N availability. In East Asia, foliar δ15N ranged from −7.1 to +2.7‰. Mean foliar δ15N values for tropical, subtropical and temperate forests were all −3.1‰, which was unexpected. The patterns of foliar δ15N with precipitation, temperature and altitude were not clear. The variation in foliar δ15N among species and between different slope positions appeared to be small within a given forest. The δ15N for both bulk soil N and extractable inorganic N generally increased with soil depth as expected, strengthening the idea that deep-rooted trees may have access to 15N-enriched N. Different from the positive correlations reported across America and Europe, in East Asia we found that foliar δ15N decreased with increasing N deposition and did not relate to soil N availability. These discrepancies deserve more research to elucidate the mechanisms by which foliar δ15N is affected by ecosystem N availability at a regional scale. The Ecological Society of Japan, 2012 Climate nationallicence East Asia nationallicence Foliar δ15N nationallicence Forest nationallicence Nitrogen deposition nationallicence Soil nitrogen availability nationallicence Fang Yunting Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut Koba Keisuke Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut Yoh Muneoki Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut Makabe Akiko Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut Liu Xueyan Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut Ecological Research Springer Japan 28/5(2013-09-01), 735-748 0912-3814 28:5<735 2013 28 11284 https://doi.org/10.1007/s11284-012-0934-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11284-012-0934-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fang Yunting Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut NATIONALLICENCE 700 1- Koba Keisuke Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut NATIONALLICENCE 700 1- Yoh Muneoki Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut NATIONALLICENCE 700 1- Makabe Akiko Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut NATIONALLICENCE 700 1- Liu Xueyan Faculty of Agriculture, Tokyo University of Agriculture and Technology, 183-8509, Fuchu, Tokyo, Japan aut NATIONALLICENCE 773 0- Ecological Research Springer Japan 28/5(2013-09-01), 735-748 0912-3814 28:5<735 2013 28 11284 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer