caa a22 4500 445384123 CHVBK 20180317143026.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10021-011-9438-6 doi (NATIONALLICENCE)springer-10.1007/s10021-011-9438-6 Effects of Carbon Dioxide Enrichment and Nitrogen Addition on Inorganic Carbon Leaching in Subtropical Model Forest Ecosystems [Elektronische Daten] [Juxiu Liu, Zhihong Xu, Deqiang Zhang, Guoyi Zhou, Qi Deng, Honglang Duan, Liang Zhao, Chunlin Wang] Soil mineral weathering may serve as a sink for atmospheric carbon dioxide (CO2). Increased weathering of soil minerals induced by elevated CO2 concentration has been reported previously in temperate areas. However, this has not been well documented for the tropics and subtropics. We used model forest ecosystems in open-top chambers to study the effects of CO2 enrichment alone and together with nitrogen (N) addition on inorganic carbon (C) losses in the leachates. Three years of exposure to an atmospheric CO2 concentration of 700ppm resulted in increased annual inorganic C export through leaching below the 70cm soil profile. Compared to the control without any CO2 and N treatments, net biocarbonate C (HCO3 −-C) loss increased by 42%, 74%, and 81% in the high CO2 concentration treatment in 2006, 2007, and 2008, respectively. Increased inorganic C export following the exposure to the elevated CO2 was related to both increased inorganic C concentrations in the leaching water and the greater amount of leaching water. Net annual inorganic C (HCO3 −-C and carbonate C: CO3 2−-C) loss via the leaching water in the high CO2 concentration chambers reached 48.0, 49.5, and 114.0kgha−1 y−1 in 2006, 2007, and 2008, respectively, compared with 33.8, 28.4, and 62.8kgha−1y−1 in the control chambers in the corresponding years. The N addition showed a negative effect on the mineral weathering. The decreased inorganic C concentration in the leaching water and the decreased leaching water amount induced by the high N treatment were the results of the adverse effect. Our results suggest that tropical forest soil systems may be able to compensate for a small part of the atmospheric CO2 increase through the accelerated processing of CO2 into HCO3 −-C during soil mineral weathering, which might be transported in part into ground water or oceans on geological timescales. Springer Science+Business Media, LLC, 2011 carbon dioxide nationallicence inorganic carbon loss nationallicence mineral weathering nationallicence N addition nationallicence soil CO2 flux nationallicence subtropical area nationallicence Liu Juxiu Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut Xu Zhihong Environmental Futures Centre & School of Biomolecular and Physical Sciences, Griffith University, 4111, Nathan, Queensland, Australia aut Zhang Deqiang Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut Zhou Guoyi Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut Deng Qi Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut Duan Honglang Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut Zhao Liang Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut Wang Chunlin Climate Centre of Guangdong Province, 510080, Guangzhou, China aut Ecosystems Springer-Verlag 14/5(2011-08-01), 683-697 1432-9840 14:5<683 2011 14 10021 https://doi.org/10.1007/s10021-011-9438-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-011-9438-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Juxiu Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Xu Zhihong Environmental Futures Centre & School of Biomolecular and Physical Sciences, Griffith University, 4111, Nathan, Queensland, Australia aut NATIONALLICENCE 700 1- Zhang Deqiang Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhou Guoyi Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Deng Qi Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Duan Honglang Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhao Liang Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, 510160, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Wang Chunlin Climate Centre of Guangdong Province, 510080, Guangzhou, China aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/5(2011-08-01), 683-697 1432-9840 14:5<683 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer