Acidity of Soil and Water Decreases in Acid-Sensitive Forests of Tropical China

Zhiyang Lie; Wenjuan Huang; Guoyi Zhou

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Acidity of Soil and Water Decreases in Acid-Sensitive Forests of Tropical China

机译：Acidity of Soil and Water Decreases in Acid-Sensitive Forests of Tropical China

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Acid deposition in China has been declining since the 2000s. While this may help mitigate acidification in forest soils and water, little is known about the recovery of soils and water from previous severe acidification in tropical China. Here, we assessed the chemistry of mineral soils, water, and acid gases (SO2 and NOx) from three successional forest types in tropical China from 2000 to 2022. Our results showed that soil pH increased sync hronously from 3.9 (2000-2015) to 4.2 (2016-2022) across all three forest types, with exchangeable acid initially decreasing and thereafter stabilizing. Surface and ground water pH also gradually increased throughout the monitoring period. Soil pH recovery was stronger in the primary than in the planted forest. However, soil pH recovery lagged behind the increase in rainfall pH by approximately a decade. The recovery of soil pH was likely related to die positive effects of the dissolution of Al/ Fe-hydroxysulfate mineral and subsequent sulfur desorption on soil acid-neutralizing capacity, increased soil organic matter, and climate warming, but was likely moderated by increased exchangeable aluminum and potentially proton-producing hydroxysulfate mineral dissolution that caused the lagged soil pH recovery. Surface and ground water pH recovery was attributed to increased water acid-neutralizing capacity. Our study reports the potential for the recovery of acidified soil and water following decreased acid deposition and provides new insights into the functional recovery of acid-sensitive forests.

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《Environmental Science & Technology: ES&T》 |2023年第30期|11075-11083|共9页
作者
Zhiyang Lie; Wenjuan Huang; Guoyi Zhou;
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作者单位

Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;

Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa 50011, United States;

Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
decreased acid deposition; pH; recovery; aluminum; soil and water acidification;

Acidity of Soil and Water Decreases in Acid-Sensitive Forests of Tropical China

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