首页|Biogeochemical sequestration of carbon within phytoliths of wetland plants: A case study of Xixi wetland, China

Biogeochemical sequestration of carbon within phytoliths of wetland plants: A case study of Xixi wetland, China

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As an important long-term terrestrial carbon sequestration mechanism,biogeochemical sequestration of carbon within phytoliths may play a significant role in the global carbon cycle and climate change.The aim of this study is to explore the potential of carbon bio-sequestration within phytoliths produced by wetland plants.The results show that the occluded carbon content of phytoliths in wetland plants ranges from 0.49％ to 3.97％,with a CV (coefficient of variation) value of 810％.The data also indicate that the phytolith-occluded carbon (PhytOC) content of biomass for wetland plants depends not only on the phytolith content of biomass,but also the efficiency of carbon occlusion within phytoliths during plant growth in herb-dominated fens.The fluxes of carbon bio-sequestration within phytoliths of herb-dominated fen plants range from 0.003 to 0.077 t CO2 equivalents t-e-CO2 ha-1 a-1.In China,0.04× 106 to 1.05× 106 t CO2 equivalents per year may be sequestrated in phytoliths of herbaceous-dominated fen plants.Globally,taking a fen area of 1.48×108 ha and the largest phytolith carbon biosequestration flux (0.077 t-e-CO2 ha-1 a-1) for herb-dominated fen plants,about 1.14× 107 t CO2 equivalents per year would have been sequestrated in phytoliths of fen plants.If other wetland plants have similar PhytOC production flux with herb-dominated fen plants (0.077 t-e-CO2 ha-1 a-1),about 4.39×107 t-e-CO2 a-1 may be sequestrated in the phytoliths of world wetland plants.The data indicate that the management of wetland ecosystems (e.g.selection of plant species) to maximize the production of PhytOC have the potential to bio-sequestrate considerable quantities of atmospheric CO2.

carbon sequestrationfen plantswetlandphytolith occluded carbon (PhytOC)China

LI ZiMin、SONG ZhaoLiang、JIANG PeiKun

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School of Environment and Resources, Zhejiang Agricultural and Forestry University, Lin'an 311300, China

Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang Agricultural and Forestry University, Lin' an 311300, China

Laboratories for Earth Surface Processes, Ministry of Education, Beijing 100871, China

College of Urban and Environmental Sciences, Peking University, Beijing 100871, China

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国家自然科学基金Zhejiang Provincial Key Science and Technology Innovation TeamZhejiang Provincial Natural Science Foundation ProgramZhejiang Provincial Natural Science Foundation ProgramOpening Project of State Key Laboratory of Environmental Geochemistry (SKLEG9011) and the Opening Project of Ministry of Edu

411030422010R50030Y5080110Z5080203201106

2013

10.1007/s11434-013-5785-3

科学通报(英文版)
中国科学院

科学通报(英文版)

SCI
ISSN：1001-6538
年,卷(期)：2013.58(20)
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