Observation and difference analysis of carbon fluxes in different types of soil in Tianjin coastal zone

• Published in: IOP conference series. Earth and environmental science 2018-02, Vol.113 (1), p.12223
• Main Authors: Li, Ya-Juan, Wang, Ting-Feng, Mao, Tian-Yu
• Format: Article
• Language: English
• Subjects: Air temperature; Backfill; Carbon; Carbon sinks; Carbon sources; Coastal zone; Coasts; Fluxes; Intertidal zone; Soil analysis; Soil temperature; Soil types; Surface temperature; Wetlands
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/113/1/012223

Tianjin Coastal Zone is located in the coastal area of the Bohai Sea, belonging to the typical coastal wetland, with high carbon value. Over the past decade the development of great intensity, there are obvious characteristics of artificial influence. This study focuses on observing the carbon fluxes of different soil types in the coastal area under strong artificial disturbance, summarizing the carbon sink calculation formula according to the soil type, and analyzing the main influencing factors affecting the carbon flux. The results show that there are representative intertidal zones in Tianjin, and the respiration of soil and secondary soil are different. The main influencing factors are soil surface temperature or air temperature. Coastal zones with different ecosystems can basically establish the relationship between temperature and soil carbon flux. (R2 = 0.5990), the relationship between artificial backfill is Q = 0.2061 − 0.2129T − 0.0391T2 (R2 = 0.7469), and the artificial soil is restored by artificial soil and the herbaceous greening is carried out., The relationship is Q = −0.1019 + 0.0327T′ (R2 = 0.6621), T-soil temperature, T'-air temperature. At the same temperature, soil carbon fluxes in shoal wetlands are generally stronger than artificial backfill, showing more carbon source emissions.