Water-extractable soil carbon in relation to the belowground carbon cycle

The change of litter input can affect soil respiration (Rs) by influencing the availability of soil organic carbon and nutrients, regulating soil microenvironments, thus resulting in a profound influence on soil carbon cycle of the forest ecosystem. We conducted an aboveground litterfall manipulation experiment in different-aged Betula platyphylla forests (25-, 40- and 61-year-old) of the permafrost region, located in the northeast of China, during May to October in 2018, with each stand treated with doubling litter (litter addition, DL), litter exclusion (no-litter, NL) and control litter (CK). Our results indicated that Rs decreased under NL treatment compared with CK treatment. The effect size lessened with the increase in the stand age; the greatest reduction was found for young Betula platyphylla forest (24.46% for 25-year-old stand) and tended to stabilize with the growth of forest with the reduction of 15.65% and 15.23% for 40-and 61- year-old stands, respectively. Meanwhile, under DL treatment, Rs increased by 27.38%, 23.83% and 23.58% on 25-, 40- and 61-year-old stands, respectively. Our results also showed that the increase caused by DL treatment was larger than the reduction caused by NL treatment, leading to a priming effect, especially on 40- and 61-year-old stands. The change in litter input was the principal factor affecting the change of Rs under litter manipulation. The soil temperature was also a main factor affecting the contribution rate of litter to Rs of different-aged stands, which had a significant positive exponential correlation with Rs. This suggests that there is a significant relationship between litter and Rs, which consequently influences the soil carbon cycle in Betula platyphylla forests of the permafrost region, Northeast China. Our finding indicated the increased litter enhanced the Rs in Betula platyphylla forest, which may consequently increase the carbon emission in a warming climate in the future. It is of great importance for future forest management in the permafrost region, Northeast China.

Download Full-text

Effects of Biochar on the Soil Carbon Cycle in Agroecosystems: An Promising Way to Increase the Carbon Pool in Dryland

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/693/1/012082 ◽

2021 ◽

Vol 693 (1) ◽

pp. 012082

Author(s):

Mengying Li ◽

Youcai Xiong ◽

Liqun Cai

Keyword(s):

Carbon Cycle ◽

Soil Carbon ◽

Carbon Pool

Download Full-text

The changing global carbon cycle: linking plant-soil carbon dynamics to global consequences

Journal of Ecology ◽

10.1111/j.1365-2745.2009.01529.x ◽

2009 ◽

Vol 97 (5) ◽

pp. 840-850 ◽

Cited By ~ 194

Author(s):

F. Stuart Chapin III ◽

Jack McFarland ◽

A. David McGuire ◽

Eugenie S. Euskirchen ◽

Roger W. Ruess ◽

...

Keyword(s):

Carbon Cycle ◽

Soil Carbon ◽

Carbon Dynamics ◽

Global Carbon Cycle ◽

Soil Carbon Dynamics ◽

Plant Soil ◽

Global Carbon

Download Full-text

Consolidating soil carbon turnover models by improved estimates of belowground carbon input

Scientific Reports ◽

10.1038/srep32568 ◽

2016 ◽

Vol 6 (1) ◽

Cited By ~ 27

Author(s):

Arezoo Taghizadeh-Toosi ◽

Bent T. Christensen ◽

Margaret Glendining ◽

Jørgen E. Olesen

Keyword(s):

Soil Carbon ◽

Carbon Turnover ◽

Belowground Carbon ◽

Consolidating Soil ◽

Soil Carbon Turnover ◽

Turnover Models

Download Full-text

The dikes of the sub-lakes change soil carbon cycle in the littoral wetland in Poyang Lake

Journal of Lake Sciences ◽

10.18307/2018.0509 ◽

2018 ◽

Vol 30 (5) ◽

pp. 1260-1270 ◽

Cited By ~ 1

Author(s):

SHEN Ruichang ◽

◽

LAN Zhichun ◽

FANG Changming ◽

CHEN Jiakuan

Keyword(s):

Carbon Cycle ◽

Soil Carbon ◽

Poyang Lake

Download Full-text

The soil carbon cycle determined by GeoChip 5.0 in sugarcane and soybean intercropping systems with reduced nitrogen input in South China

Applied Soil Ecology ◽

10.1016/j.apsoil.2020.103653 ◽

2020 ◽

Vol 155 ◽

pp. 103653 ◽

Cited By ~ 1

Author(s):

Lingling Yu ◽

Shasha Luo ◽

Xia Xu ◽

Yonggang Gou ◽

Jianwu Wang

Keyword(s):

Carbon Cycle ◽

Soil Carbon ◽

South China ◽

Nitrogen Input ◽

Reduced Nitrogen

Download Full-text

Modelling carbon sink of urban street trees and soil in Helsinki, Finland

10.5194/egusphere-egu2020-13833 ◽

2020 ◽

Author(s):

Minttu Havu ◽

Liisa Kulmala ◽

Anu Riikonen ◽

Leena Järvi

Keyword(s):

Carbon Dioxide ◽

Soil Moisture ◽

Carbon Cycle ◽

Soil Carbon ◽

Urban Areas ◽

Carbon Dioxide Flux ◽

Specific Humidity ◽

Soil Conditions ◽

Surface Model ◽

Flow Measurements

A high proportion of anthropogenic carbon dioxide emissions originate from urban areas, which has led cities to become interested in reducing their own emissions and determining how much carbon could be sequestered by their own vegetation and soil. The challenge with the latter is that our current knowledge on carbon storage is based on data and models from natural and forest ecosystems, whereas the response of vegetation and soil to environmental factors most probably is altered in urban green space where the soil conditions, water availability and temperature are highly variable. Therefore, ecosystem models are required to correctly account for urban vegetation and soil to understand and quantify the biogenic carbon cycle in urban areas. In this study, urban land surface model SUEWS (the Surface Urban Energy and Water Balance Scheme) and the soil carbon decomposition model Yasso15 are used to simulate urban carbon cycle on two streets in Helsinki, Finland for years 2003-2016. Curbside trees (Alnus glutinosa and Tilia x Vulgaris) were planted while the two test streets were constructed in 2002. Thereafter, carbon and water fluxes and pools with detailed street tree soil compositions were monitored in 2002-2014. SUEWS creates a local spatially variable temperature and specific humidity environment which is used in the model runs. The modelled evaporation is evaluated against sap flow measurements and modelled soil moisture against soil moisture observations. The Yasso15 model is evaluated against loss-on-ignition based soil carbon measurements as it has not been previously evaluated in urban soils. The modelled carbon dioxide flux combined with the changes in the soil carbon stock is used to estimate the carbon cycle of urban street trees and soils.

Download Full-text