Responses of soil organic matter and microorganisms to freeze–thaw cycles

Soil organic matter (SOM) biomarker methods were utilized in this study to investigate the responses of fungi and bacteria to freeze–thaw cycles (FTCs) and to examine freeze–thaw-induced changes in SOM composition and substrate availability. Unamended, grass-amended, and lignin-amended soil samples were subject to 10 laboratory FTCs. Three SOM fractions (free lipids, bound lipids, and lignin-derived phenols) with distinct composition, stability and source were examined with chemolysis and biomarker Gas Chromatography/Mass Spectrometry methods and the soil microbial community composition was monitored by phospholipid fatty acid (PLFA) analysis. Soil microbial respiration was also measured before and during freezing...

Categories: Publication; Types: Citation, Journal Citation; Tags: Soil Biology and Biochemistry, bacteria, biomarkers, bound lipids, co2 flush, All tags... free lipids, freeze–thaw cycles, fungi, lignin, microbial respiration, soil organic matter, Fewer tags