Effects of warming and litter positions on litter decomposition in a boreal peatland

Litter decomposition is an important source of carbon accumulation in the permafrost peatlands. Climate warming has led to shrub expansions and accelerated litter mixing with soils fluctuations water table. However, little known about how changes position will affect under climate warming. To reveal mechanisms response location soil Here, we selected evergreen shrub, Chamaedaphne calyculata , deciduous Vaccinium uliginosum from peatlands Greater Hing’an Mountains, China. The leaf was placed on surface (no-mixing) mixed (soil-litter mixing), then it incubated for 124 days at 15°C (control) 20°C (warming). Our results showed that significantly increased CO 2 emission rates C. V. by 19.9 17.4%, respectively. When compared no-mixing, were reduced (not significantly) 1.5 ( ) 13.6% soil-litter mixing. Interestingly, suppressed positive effect relative suppressing effects subplot stronger than those subplot. Specifically, emissions 27.4% no-mixing but increase decreased 13.1% Similarly, induced significant increases 38.8% non-significant (1.9%) observed combination enzyme activities β-1,4-glucosidase, β-1,4-xylosidase β-D-1,4-cellobiosidase laccase phenolics explained more 60.0% variability study highlights importance positions mediating responses northern