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Seasonal Dynamics of Soil Labile Organic Carbon and Enzyme Activities in Relation to Vegetation Types in Hangzhou Bay Tidal Flat Wetland

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  • Xuexin Shao
  • Wenying Yang
  • Ming Wu

Abstract

Soil labile organic carbon and soil enzymes play important roles in the carbon cycle of coastal wetlands that have high organic carbon accumulation rates. Soils under three vegetations (Phragmites australis, Spartina alterniflora, and Scirpusm mariqueter) as well as bare mudflat in Hangzhou Bay wetland of China were collected seasonally. Seasonal dynamics and correlations of soil labile organic carbon fractions and soil enzyme activities were analyzed. The results showed that there were significant differences among vegetation types in the contents of soil organic carbon (SOC) and dissolved organic carbon (DOC), excepting for that of microbial biomass carbon (MBC). The P. australis soil was with the highest content of both SOC (7.86 g kg-1) and DOC (306 mg kg-1), while the S. mariqueter soil was with the lowest content of SOC (6.83 g kg-1), and the bare mudflat was with the lowest content of DOC (270 mg kg-1). Soil enzyme activities were significantly different among vegetation types except for urease. The P. australis had the highest annual average activity of alkaline phosphomonoesterase (21.4 mg kg-1 h-1), and the S. alterniflora had the highest annual average activities of β-glycosidase (4.10 mg kg-1 h-1) and invertase (9.81mg g-1 24h-1); however, the bare mudflat had the lowest activities of alkaline phosphomonoesterase (16.2 mg kg-1 h-1), β-glycosidase (2.87 mg kg-1 h-1), and invertase (8.02 mg g-1 24h-1). Analysis also showed that the soil labile organic carbon fractions and soil enzyme activities had distinct seasonal dynamics. In addition, the soil MBC content was significantly correlated with the activities of urease and β-glucosidase. The DOC content was significantly correlated with the activities of urease, alkaline phosphomonoesterase, and invertase. The results indicated that vegetation type is an important factor influencing the spatial-temporal variation of soil enzyme activities and labile organic carbon in coastal wetlands.

Suggested Citation

  • Xuexin Shao & Wenying Yang & Ming Wu, 2015. "Seasonal Dynamics of Soil Labile Organic Carbon and Enzyme Activities in Relation to Vegetation Types in Hangzhou Bay Tidal Flat Wetland," PLOS ONE, Public Library of Science, vol. 10(11), pages 1-15, November.
    • Handle: RePEc:plo:pone00:0142677
    DOI: 10.1371/journal.pone.0142677
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    Cited by:

    1. Ye Xiao & Zhigang Huang & Youfeng Li & Yulin Ling & Hanxi Xiao, 2021. "Dynamics Variation of Soil Labile Organic Carbon Fractions in Different Wetland Types of Dongting Lake under Seasonal Water Level Fluctuation," Sustainability, MDPI, vol. 13(24), pages 1-15, December.
    2. Yuriy Kravchenko & Anna Yarosh & Yimin Chen, 2022. "Profile Soil Carbon and Nitrogen Dynamics in Typical Chernozem under Long-Term Tillage Use," Land, MDPI, vol. 11(8), pages 1-19, July.
    3. Joanna Lemanowicz & Kinga Gawlińska & Anetta Siwik-Ziomek, 2021. "Impact of Technogenic Saline Soils on Some Chemical Properties and on the Activity of Selected Enzymes," Energies, MDPI, vol. 14(16), pages 1-17, August.
    4. Qing Zhao & Jie Tang & Zhaoyang Li & Wei Yang & Yucong Duan, 2018. "The Influence of Soil Physico-Chemical Properties and Enzyme Activities on Soil Quality of Saline-Alkali Agroecosystems in Western Jilin Province, China," Sustainability, MDPI, vol. 10(5), pages 1-15, May.

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