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