CO2 leakage-induced vegetation decline is primarily driven by decreased soil O-2

文献类型： 外文期刊

第一作者： Zhang, Xueyan

作者： Zhang, Xueyan;Ma, Xin;Li, Yue;Ma, Xin;Li, Yue;Zhao, Zhi;Wu, Yang

作者机构：

关键词： Carbon capture and storage;Leaked CO2;Soil anaerobic conditions;Soil pH;Maize;Environmental impacts

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： To assess the potential risks of carbon capture and storage (CCS), studies have focused on vegetation decline caused by leaking CO2. Excess soil CO2 caused by leakage can affect soil O-2 concentrations and soil pH, but how these two factors affect plant development remains poorly understood. This hinders the selection of appropriate species to mitigate potential negative consequences of CCS. Through pot experiments, we simulated CO2 leakage to examine its effects on soil pH and soil O-2 concentrations. We subsequently assessed how maize growth responded to these changes in soil pH and O-2. Decreased soil O-2 concentrations significantly reduced maize biomass, and explained 69% of the biomass variation under CO2 leakage conditions. In contrast, although leaked CO2 changed soil pH significantly (from 7.32 to 6.75), it remained within the optimum soil pH range for maize growth. This suggests that soil O-2 concentration, not soil pH, influences plant growth in these conditions. Therefore, in case of potential CO2 leakage risks, hypoxia-tolerant species should be chosen to improve plant survival, growth, and yield. (C) 2016 Elsevier Ltd. All rights reserved.

分类号： X32

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