caa a22 4500 606218505 CHVBK 20210128101113.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s11104-014-2303-6 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2303-6 The effects of an induced short-term drought period on the spatial variations in soil respiration measured around emergent trees in a typical bornean tropical forest, Malaysia [Elektronische Daten] [Mizue Ohashi, Tomonori Kume, Natsuko Yoshifuji, Lip Kho, Michiko Nakagawa, Tohru Nakashizuka] Background: Our previous studies documented how soil CO2 efflux, one of the main carbon pathways in forest ecosystems, is affected by soil moisture and forest structure in an aseasonal tropical rainforest in Borneo, Malaysia. Aim: In this study, we clarify the effect of short-term drought treatment on the spatial variation of soil CO2 efflux in a forest, and to interpret the changes in soil CO2 efflux caused by root activities. Methods: Experimental plots (15m radius) were established around six emergent trees and a drought treatment was conducted for three of the six plots. Soil CO2 efflux was measured along with environmental factors and root biomass, respiration and production in each plot. Results: Soil CO2 efflux at 0.5m of the emergent trees was nearly three times higher than at 5 and 10m away from the trees. Root respiration and biomass had no correlation with the spatial variation. Soil water content decreased by nearly 30% during the drought treatment, although soil CO2 efflux was unchanged between drought and control plots. Conclusions: Our result suggests a strong spatial variation exists in soil CO2 efflux around emergent trees, but short-term severe drought has little effect on it. Springer International Publishing Switzerland, 2014 Drought treatment nationallicence Emergent tree nationallicence Soil CO2 efflux nationallicence Short-term monitoring nationallicence Tropical forest nationallicence Ohashi Mizue School of Human Science and Environment, University of Hyogo, 1-1-12 Shinzaike-honcho, 670-0092, Himeji, Hyogo, Japan aut Kume Tomonori School of Forestry and Resource Conservation, National Taiwan University, 10617, Taipei, Taiwan aut Yoshifuji Natsuko Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut Kho Lip Tropical Peat Research Institute, Malaysian Palm Oil Board, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia aut Nakagawa Michiko Graduate School of Bioagricultural Sciences, Nagoya University, 464-8601, Chikusa-ku, Nagoya, Japan aut Nakashizuka Tohru Graduate School of Life Sciences, Tohoku University, 980-8578, Sendai, Japan aut Plant and Soil Springer International Publishing 387/1-2(2015-02-01), 337-349 0032-079X 387:1-2<337 2015 387 11104 https://doi.org/10.1007/s11104-014-2303-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2303-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ohashi Mizue School of Human Science and Environment, University of Hyogo, 1-1-12 Shinzaike-honcho, 670-0092, Himeji, Hyogo, Japan aut NATIONALLICENCE 700 1- Kume Tomonori School of Forestry and Resource Conservation, National Taiwan University, 10617, Taipei, Taiwan aut NATIONALLICENCE 700 1- Yoshifuji Natsuko Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan aut NATIONALLICENCE 700 1- Kho Lip Tropical Peat Research Institute, Malaysian Palm Oil Board, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia aut NATIONALLICENCE 700 1- Nakagawa Michiko Graduate School of Bioagricultural Sciences, Nagoya University, 464-8601, Chikusa-ku, Nagoya, Japan aut NATIONALLICENCE 700 1- Nakashizuka Tohru Graduate School of Life Sciences, Tohoku University, 980-8578, Sendai, Japan aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 387/1-2(2015-02-01), 337-349 0032-079X 387:1-2<337 2015 387 11104