Changes in Soil Substrate and Microbial Properties Associated with Permafrost Thaw Reduce Nitrogen Mineralization
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Changes in Soil Substrate and Microbial Properties Associated with Permafrost Thaw Reduce Nitrogen Mineralization. / Yang, Xue; Jin, Xiaoying; Yang, Sizhong; Jin, Huijun; Wang, Hongwei; Li, Xiaoying; He, Ruixia; Wang, Junfeng; Sun, Zhizhong; Yun, Hanbo.
In: Forests, Vol. 14, No. 10, 2060, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Changes in Soil Substrate and Microbial Properties Associated with Permafrost Thaw Reduce Nitrogen Mineralization
AU - Yang, Xue
AU - Jin, Xiaoying
AU - Yang, Sizhong
AU - Jin, Huijun
AU - Wang, Hongwei
AU - Li, Xiaoying
AU - He, Ruixia
AU - Wang, Junfeng
AU - Sun, Zhizhong
AU - Yun, Hanbo
N1 - Publisher Copyright: © 2023 by the authors.
PY - 2023
Y1 - 2023
N2 - Anticipated permafrost thaw in upcoming decades may exert significant impacts on forest soil nitrogen (N) dynamics. The rate of soil N mineralization (Nmin) plays a crucial role in determining soil N availability. Nevertheless, our understanding remains limited regarding how biotic and abiotic factors influence the Nmin of forest soil in response to permafrost thaw. In this study, we investigated the implications of permafrost thaw on Nmin within a hemiboreal forest based on a field investigation along the degree of permafrost thaw, having monitored permafrost conditions for eight years. The results indicate that permafrost thaw markedly decreased Nmin values. Furthermore, Nmin demonstrated positive associations with soil substrates (namely, soil organic carbon and soil total nitrogen), microbial biomass carbon and nitrogen, and soil moisture content. The decline in Nmin due to permafrost thaw was primarily attributed to the diminished quality and quantity of soil substrates rather than alterations in plant community composition. Collectively, our results underscore the pivotal role of soil substrate and microbial biomass in guiding forest soil N transformations in the face of climate-induced permafrost thaw.
AB - Anticipated permafrost thaw in upcoming decades may exert significant impacts on forest soil nitrogen (N) dynamics. The rate of soil N mineralization (Nmin) plays a crucial role in determining soil N availability. Nevertheless, our understanding remains limited regarding how biotic and abiotic factors influence the Nmin of forest soil in response to permafrost thaw. In this study, we investigated the implications of permafrost thaw on Nmin within a hemiboreal forest based on a field investigation along the degree of permafrost thaw, having monitored permafrost conditions for eight years. The results indicate that permafrost thaw markedly decreased Nmin values. Furthermore, Nmin demonstrated positive associations with soil substrates (namely, soil organic carbon and soil total nitrogen), microbial biomass carbon and nitrogen, and soil moisture content. The decline in Nmin due to permafrost thaw was primarily attributed to the diminished quality and quantity of soil substrates rather than alterations in plant community composition. Collectively, our results underscore the pivotal role of soil substrate and microbial biomass in guiding forest soil N transformations in the face of climate-induced permafrost thaw.
KW - forests
KW - microbial biomass
KW - nitrogen mineralization
KW - permafrost thaw
KW - soil organic carbon and nitrogen
U2 - 10.3390/f14102060
DO - 10.3390/f14102060
M3 - Journal article
AN - SCOPUS:85175065212
VL - 14
JO - Forests
JF - Forests
SN - 1999-4907
IS - 10
M1 - 2060
ER -
ID: 372701351