The effect of fire disturbance on short-term soil respiration in typical forest of Greater Xing’an Range, China

Effects of fire disturbance on soil respiration in the non-growing season in a Larix gmelinii forest in the Daxing'an Mountains, China

“…Fire reduces Rs to a degree dependent on the fire severity and duration [ 71 – 73 ]. In the non-growing season, high burn severity resulted in significantly decreased Rs, approximately 55% of that of the control sites.…”

“…During the growing season, the interaction between T and soil moisture content is the primary factor reported to restrict Rs [ 71 , 83 , 84 ]. However, the water in the soil is frozen and thus virtually ineffective for Rs during the non-growing season.…”

Changes in soil carbon fractions and enzyme activities under different vegetation types of the northern Loess Plateau

“…While the proportion of soil active organic carbon to soil total organic carbon is low, this ratio can reflect the changes in soil carbon groups due to soil management measures and environmental changes (Jha et al., 2012; Sahoo et al., 2019). The soil active organic carbon is directly involved in the biological and chemical conversion process of soil (Sun et al., 2014), plays a vital role in the cycling of soil nutrient, and stores soil nutrients (Simard et al., 2001). Furthermore, soil active organic carbon is easily affected by plants and microorganisms in a significant way (Chen et al., 2010; Kimura et al., 2004).…”

Soil carbon flux research in the Asian region: Review and future perspectives

“…Globally, approximately half the average annual flux of 2.0 Pg C yr -1 has been emitted due to fires in forest ecosystems between 1997 and 2009; 20 of these fires were from deforestation and tropical forest fires, 16 from woodland fires, and 15 from mostly extra-tropical forest fires 2001 -2009 van der Werf et al, 2010 . Although most fires in ecosystems are set by humans, a complex interaction between climate, ecosystem processes, and human activities determines fire-driven C emissions from burned areas van der Werf et al, 2010 . In tropical peatlands of Southeast Asia such as the Indonesian lowlands and Peninsular Malaysia, there are substantial fire-driven C losses in the global terrestrial C cycle Herawati and Santoso, 2011;Smith et al, 2018;Kumar et al, 2020 . For examples, the R s from burned peat surfaces increased 46 over the first nine months following a fire in the Kalimantan tropical peatland forest Astiani et al, 2018 , and a ground fire significantly stimulated R s by 17.5 for a mixed forest of sub-tropical-temperate transition zones in central China Hu et al, 2020 . Although the humid climate typical of the Asian monsoon region is relatively free from wildfire when compared to drier ecosystems in other arid or boreal ecosystems, the frequency, intensity, and size of wildfires have been increasing and is expected to increase rapidly in future given the increase in lightning strikes and seasonally extreme droughts associated with global warming Hu et al, 2017;Chen et al, 2019;Song et al, 2019. Sun et al 2014 investigated the effect of fire disturbance on R s in birch and larch forests in China, and Hu et al 2017 examined the effects of fire severity on R s in larch forests to better estimate R s in boreal ecosystems; they found that wildfires decreased R s mainly due to decreased autotrophic respiration.…”