Publications by authors named "Yan-Yu Song"
[Change in nitrogen availability of northern peatlands and its effect on carbon sink function].
Ying Yong Sheng Tai Xue Bao
October 2022
Northern peatlands are typical nitrogen-limited ecosystems, which are sensitive to global climate change and human activities. The increases of endogenous available nitrogen caused by climate warming and exogenous nitrogen input caused by human activities changed the nitrogen availability of northern peatlands, and would affect carbon and nitrogen cycling and carbon sink function of peatland. Here, we review the influence factors of carbon accumulation rate and carbon sink function in northern peatlands.
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- Soil microbial carbon metabolism plays a crucial role in carbon cycling within wetlands, yet most research tends to focus only on surface layers.
- In a study across five reed wetlands in the Songnen Plain, it was found that microbial carbon activity decreases significantly with soil depth, with activity in deeper layers being only 57.41% - 74.60% of that in the top layer.
- Key factors influencing microbial carbon usage include dissolved organic carbon (DOC) and other soil properties, highlighting the importance of microbial metabolism in the deeper soil layers.
The changes in microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) were examined in order to assess the effect of surface layer soil (0 - 10 cm) under different land-use types after freshwater marshes tillage in the Sanjiang Plain Northeast China. Land uses were Deyeuxia angustifolia freshwater marshes ((DAM), cultivated land (CL), recovery freshwater marsh (RFM), constructed woodland (CW). After DAM soil tillage, MBC, MBN, DOC and DON declined strongly in agricultural surface soil layer, decreased 63.
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