globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14328
Scopus ID: 2-s2.0-85053875116
Temporal response of soil organic carbon after grassland-related land-use change
Author: Li W.; Ciais P.; Guenet B.; Peng S.; Chang J.; Chaplot V.; Khudyaev S.; Peregon A.; Piao S.; Wang Y.; Yue C.
Source Publication: Global Change Biology
ISSN: 13541013
Publishing Year: 2018
Volume: 24, Issue:10
pages begin: 4731
pages end: 4746
Language: 英语
Keyword: land-use and land-cover change ; NPP ; soil carbon response curve ; soil organic carbon ; temporal change
English Abstract: The net flux of CO2 exchanged with the atmosphere following grassland-related land-use change (LUC) depends on the subsequent temporal dynamics of soil organic carbon (SOC). Yet, the magnitude and timing of these dynamics are still unclear. We compiled a global data set of 836 paired-sites to quantify temporal SOC changes after grassland-related LUC. In order to discriminate between SOC losses from the initial ecosystem and gains from the secondary one, the post-LUC time series of SOC data was combined with satellite-based net primary production observations as a proxy of carbon input to the soil. Globally, land conversion from either cropland or forest into grassland leads to SOC accumulation; the reverse shows net SOC loss. The SOC response curves vary between different regions. Conversion of cropland to managed grassland results in more SOC accumulation than natural grassland recovery from abandoned cropland. We did not consider the biophysical variables (e.g., climate conditions and soil properties) when fitting the SOC turnover rate into the observation data but analyzed the relationships between the fitted turnover rate and these variables. The SOC turnover rate is significantly correlated with temperature and precipitation (p < 0.05), but not with the clay fraction of soils (p > 0.05). Comparing our results with predictions from bookkeeping models, we found that bookkeeping models overestimate by 56% of the long-term (100 years horizon) cumulative SOC emissions for grassland-related LUC types in tropical and temperate regions since 2000. We also tested the spatial representativeness of our data set and calculated SOC response curves using the representative subset of sites in each region. Our study provides new insight into the impact grassland-related LUC on the global carbon budget and sheds light on the potential of grassland conservation for climate mitigation. © 2018 John Wiley & Sons Ltd
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被引频次[WOS]:12   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China; Institut de Recherche pour le Développement (IRD), Laboratoire d'Océanographie et du Climat: Expérimentations et approches numériques, UMR 7159, Paris, France; Institute of Soil Science and Agrochemistry, Siberian Branch Russian Academy of Sciences (SB RAS), Novosibirsk, Russian Federation

Recommended Citation:
Li W.,Ciais P.,Guenet B.,et al. Temporal response of soil organic carbon after grassland-related land-use change[J]. Global Change Biology,2018-01-01,24(10)
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