globalchange  > 气候变化与战略
DOI: 10.1016/j.foreco.2020.117988
论文题名:
Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes
作者: Xiong X.; Zhang H.; Deng Q.; Hui D.; Chu G.; Meng Z.; Zhou G.; Zhang D.
刊名: Forest Ecology and Management
ISSN: 3781127
出版年: 2020
卷: 462
语种: 英语
英文关键词: Reforestation ; Soil carbon stock ; Soil carbon turnover ; Stable carbon isotopes
Scopus关键词: Conservation ; Isotopes ; Organic carbon ; Reforestation ; Restoration ; Soil moisture ; Evergreen broad-leaved forests ; Isotopic enrichment ; Natural restoration ; Soil carbon stock ; Soil carbon turnover ; Soil organic carbon turnovers ; Soil water content ; Stable carbon isotopes ; Soil surveys ; broad-leaved forest ; carbon balance ; carbon sequestration ; forest ecosystem ; organic carbon ; reforestation ; restoration ecology ; secondary forest ; soil carbon ; soil profile ; soil water ; stable isotope ; tropical forest ; turnover ; China ; Acacia mangium ; Coniferophyta
英文摘要: As over half of the world's tropical forests are reforested or afforested, understanding the resilience of carbon (C) pool in these forests is critical for global C balance. While most previous studies on the reforested lands have focused on C stock recovery, soil C turnover has largely been overlooked. We evaluated soil C turnover rate by calculating the isotopic enrichment factors of α (defined as the slope of the regression between the δ13C difference and ln-transferred C concentrations in mineral soil samples relative to the surface litter) and β (defined as the slope of the regression between δ13C and log-transferred C concentrations) along 0–30 cm soil profiles in a 400-year-old monsoon evergreen broad-leaved forest (MEBF), a 51-year-old mixed-native plantation (NP1), a 31-year-old mixed-native plantation (NP2), a 31-year-old Acacia mangium plantation (AP), a 31-year-old mixed-conifer plantation (CP), and a 31-year-old secondary forest with natural restoration (SF). Results showed that soil C stocks did not differ among the six forests. The estimated α values ranged from 1.0023 to 1.0086 and increased in the order of MEBF = NP1 < NP2 = AP = CP < SF. The estimated β values ranged from −19.70 to −5.22 but showed an opposite trend to α values. Additionally, changes of the α and β values among these forests were mainly regulated by soil water content and bulk density. Our findings demonstrate that forest restoration could enhance soil C stock equivalent to the undisturbed old-growth forests within a few decades, but the rate of soil C turnover in these restored forests were still higher. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158405
Appears in Collections:气候变化与战略

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作者单位: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystem, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; Center for Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou, 510650, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 510301, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 10049, China; Department of Biological Sciences, Tennessee State University, Nashville, TN 37209, United States; School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, 210044, China

Recommended Citation:
Xiong X.,Zhang H.,Deng Q.,et al. Soil organic carbon turnover following forest restoration in south China: Evidence from stable carbon isotopes[J]. Forest Ecology and Management,2020-01-01,462
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