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Estimation of Storage and Density of Organic Carbon in peatlands of China

Chinese Geographical Science 2012年第6期22卷 637-646页

作者： LIU Zigang WANG Ming MA Xuehui School of Environment and Natural Resources Renmin University of China Beijing 100872 China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Based on the results of the National Survey of Peat Resources(1983-1985) and the investigation results on the peatlands of China,the storage and density of the organic carbon in the peatlands of China were *** total organic carbon storage(OCS) of the peatlands in China,including bare peatlands and buried peatlands,are 1.503 × 109 t,unevenly distributed over 30 provincial level administrative units and 16 climatic *** organic carbon storage(POCS) in Sichuan(6.45 × 108 t) and Yunnan provinces(2.91 × 108 t) is the highest,accounting for 62.29% of the total *** zone of plateau has the highest POCS of 7.14 × 108 t,especially in the Zoigê Plateau,where the POCS is 6.30 × 108 t,accounting for 41.92% of the total POCS of *** organic carbon density(OCD) of the peatlands in China mostly ranges from 80 kg/m3 to 140 kg/m3,and the range of the maximum is 270-360 kg/m3,and the minimum is less than 80 kg/*** by the Yanshan Mountain,Taihang Mountains and Hengduan Mountains,the peatland oganic carbon density(POCD) is lower on the northwestern side than that on the southeastern *** Province has the highest POCD due to the ancient buried *** OCD of the bare peatlands is mostly in the range of 60-150 kg/m3,and that of the buried peatlands is more than 100 kg/*** the bare peatlands,the OCD generally increases from the surface layer to the below surface layer,and then decreases with the *** the peatlands area in China is small,the OCS per unit area is far higher than the other soil types,so peatlands protection can effectively mitigate climate change.

关键词： peatlands organic carbon storage organic carbon density China

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Effects of water level alteration on carbon cycling in peatlands

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Ecosystem Health and Sustainability 2020年第1期6卷 199-227,198页

作者： Yehui Zhong Ming Jiang Beth A.Middleton Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchunJilinPR China University of Chinese Academy of Sciences BeijingPR China Jilin Provincial Joint Key Laboratory of Changbai Mountain Wetland and Ecology ChangchunJilinPR China U.S.Geological Survey Wetlands and Aquatic Research CenterLafayetteLAUSA

Globally,peatlands play an important role in the carbon(C)*** water level is a key factor in maintaining C storage in peatlands,but water levels are vulnerable to climate change and anthropogenic *** review examines literature related to the effects of water level alteration on C cycling in peatlands to summarize new ideas and uncertainties emerging in this *** ecosystems maintain their function by altering plant community structure to adapt to changing water *** primary production,woody plants are more productive in unflooded,well-aerated conditions,while Sphagnum mosses are more productive in wetter *** responses of sedges to water level alteration are *** peat decomposition is faster in unflooded,well aerated conditions,increased plant production may counteract the C loss induced by increased ecosystem respiration(ER)for a period of *** contrast,rising water table maintains anaerobic conditions and enhances the role of the peatland as a C ***,changes in DOC flux during water level fluctuation is complicated and depends on the interactions of flooding with ***,vegetation also plays a role in C flux but particular species vary in their ability to sequester and transport *** ecosystems have a greater resilience to water level alteration than fens,due to differences in biogeochemical responses to *** full understanding of the role of peatlands in global C cycling deserves much more study due to uncertainties of vegetation feedbacks,peat-water interactions,microbial mediation of vegetation,wildfire,and functional responses after hydrologic restoration.

关键词： peatlands carbon cycling climate change anthropogenic disturbance water level

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Comparison Between the Formation of peatlands and Paleosols of Sandy Land and the Changes of Ari4 Index During Holocene in Northeast China

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Chinese Science Bulletin 1994年第15期39卷 1290-1294页

作者：李取生 Changchun Institute of Geography Academia Sinica Changchun 130021 PRC

In Northeast China, peatlands and paleosols have developed very well in the eastern swamps and western sandy lands, respectively. They become an important object of studying the paleoenvironment in this region. Since both of them were formed under humid climate conditions, it is significant to compare their formation and ages for the unification of climatic change divisions and the reconstruction of the

关键词： Northeast China peatlands and paleosols of sandy land comparison study change of aridity.

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Effects of climate anomaly on rainfall, groundwater depth, and soil moisture on peatlands in South Sumatra, Indonesia

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Journal of Groundwater Science and Engineering 2023年第1期11卷 81-88页

作者： Muhammad Irfan Sri Safrina Erry Koriyanti Netty Kurniawati Khairul Saleh Iskhaq Iskandar Department of Physics Faculty of Mathematics and Natural SciencesUniversity of SriwijayaJl.Raya Prabumulih Km.32InderalayaSouth SumateraIndonesia Department of English Education Faculty of Education and Teacher TrainingUniversity of SriwijayaJl.Raya Prabumulih Km.32InderalayaSouth SumateraIndonesia

Climate anomalies can cause natural disasters such as severe fires and floods on peatlands in South *** that affect the natural disasters on peatlands include rainfall,groundwater level,and soil *** paper aims to study the effect of the climate anomalies in 2019 and 2020 and effects of these influencing factors on peatlands in South *** data used in this study was derived from insitu measurement at two SESAME’s measurement stations in the study *** results indicate that in the 2019 dry season,the rainfall was minimal,the lowest groundwater table depth was-1.14 m and the lowest soil moisture was 3.4%.In the 2020 dry season,rainfall was above the monthly average of 100 mm,the lowest groundwater level was-0.44 m,and the lowest soil moisture was 26.64%.There is also a strong correlation between soil moisture and groundwater table *** correlation between the two is stronger when there is less rainfall.

关键词： IOD ENSO Dry season Correlation peatlands

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Suspended Solids from Drained peatlands in the East Coastal Zone of New Brunswick： Point Estimates and Climate Effects on the Environment

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Journal of Environmental Science and Engineering(A) 2015年第1期4卷 1-13页

作者： Mathieu Quenum Marion Tetegan Papa Malick Sail Department of Peat Peatlands and Sustainable Development Coastal Zones Research Institute Shippagan E8S1J2 Canada

peatlands represent one of the most important economic resources and abandoned peatlands after mining can be considered as ecological resources by re-vegetation restoration or management. However, some environmental problems like particles from peatlands and their effects in the water system have to be characterized. Since centuries, artificial drainage has been a current practice for the mining of peatlands. Mainly mined for horticultural purpose, New Brunswick＇s peatlands--predominantly located in the eastern of the province--cover about 140,000 ha. At the downstream end of the drainage system, the water from peatlands flow into sedimentation basins. Drainage waters are often laden with solid particles. Once they have flowed through the ponds to allow sediment settling, the water is released into the water system. This paper describes the spatio-temporal evolution of suspended solids from 12 New Brunswick drained peatlands. The studied sites were characterized by some heterogeneity in the concentration of suspended solids. This study also provides knowledge on the suspended solids amount that can be released by drained peatlands, and it proposes a function to estimate the concentration of suspended solids by using climate variables; and identifies some potential ecological risks.

关键词： peatlands drainage sedimentation ponds suspended matters water system.

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Soil respiration in paludified forests of European Russia

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Journal of Forestry Research 2020年第5期31卷 1939-1948页

作者： Dmitry Ivanov Fedor Tatarinov Julia Kurbatova A.N.Severtsov Institute of Ecology and Evolution RAS Leninsky Prospekt 33MoscowRussia 119071 Weizmann Institute of Science Herzl St 23476100 RehovotIsrael

Soil respiration studies in paludified forests of the European part of Russia are quite rare in comparison with those of open peat bogs,which make long-term observations in this region highly *** this study,soil CO2 emissions were measured by the close chamber method in different microlandscapes of paludified *** four summer seasons with different environments,soil respiration ranged from 1078 to 248 mg CO2 m^-2 h^-1 in a paludified spruce forest site with coarse woody debris to 659–820 mg CO2 m^-2 h^-1 in a paludified boggy pine *** most intensive soil respiration was observed during the hot summer of 2013 and the lowest in the hot and humid summer of *** total soil CO2 emissions in paludified forests in 2015–2016 were approximately 2000–3000 g CO2 *** the year,the lowest CO2 emission values were observed from November to April(14–84 mg CO2 m^-2 h^-1)and the maximum were in July and August(522–1205 mg CO2 m^-2 h^-1).The contributions of CO2 emissions in the cold November–April period were 6–8.5%.The impacts of temperature on soil respiration were higher(r2=0.45–0.57)than those of groundwater levels(r^2=0.17–0.49).Soil respiration in the paludified spruce forest and in the pine bog generally were higher than emissions from ecosystems with similar hydrothermal conditions in the boreal zone.

关键词： Carbon flux Chamber measurements CO2 emission peatlands Southern taiga

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Temperature Responses to Infrared-Loading and Water Table Manipulations in Peatland Mesocosms

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Journal of Integrative Plant Biology 2008年第11期50卷 1484-1496页

作者： Jiquan Chen Scott Bridgham Jason Keller John Pastor Asko Noormets Jake F.Weltzin Department of Environmental Sciences University of Toledo Center for Ecology and Evolutionary Biology University of Oregon Smithsonian Environmental Research Center Department of Biological Sciences University of Minnesota National Phenology Network

We initiated a multi-factor global change experiment to explore the effects of infrared heat loading （HT） and water table level （WL） treatment on soil temperature （T） in bog and fen peatland mesocosms. We found that the temperature varied highly by year, month, peatland type, soil depth, HT and WL manipulations. The highest effect of HT on the temperature at 25 cm depth was found in June for the bog mesocosms （3.34-4.27 ℃） but in May for the fen mesocosms （2.32-4.33 ℃） over the 2-year study period. The effects of WL in the bog mesocosms were only found between August and January, with the wet mesocosms warmer than the dry mesocosms by 0.48-2.03 ℃ over the 2-year study period. In contrast, wetter fen mesocosms were generally cooler by 0.16-3.87℃. Seasonal changes of temperatures elevated by the HT also varied by depth and ecosystem type, with temperature differences at 5 cm and 10 cm depth showing smaller seasonal fluctuations than those at 25 cm and 40 cm in the bog mesocosms. However, increased HT did not always lead to warmer soil, especially in the fen mesocosms. Both HT and WL manipulations have also changed the length of the non-frozen season.

关键词： global change infrared mesocosm peatlands warming experiment water table.

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