Research BackgroundIn permafrost regions, CH₄ emissions represent a significant potential positive feedback to global warming. However, most existing studies and models assume a monotonic response between CH₄ fluxes and temperature, paying relatively little attention to the possible nonlinear threshold characteristics in CH₄ production and oxidation processes, as well as to the asymmetry in hydrothermal conditions between warming and cooling seasons. This suggests that the same temperature may correspond to different flux states during the warming and cooling phases (i.e., “hysteresis effect”). Yet, this phenomenon has so far lacked long-term, in-situ empirical evidence in forest-wetland transition zones characterized by high hydrological heterogeneity.To this end, Professor Zang Shuying’s...
release time:
2026
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08
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21
Views：4
Research BackgroundIn permafrost regions, CH₄ emissions represent a significant potential positive feedback to global warming. However, most existing studies and models assume a monotonic response between CH₄ fluxes and temperature, paying relatively little attention to the possible nonlinear threshold characteristics in CH₄ production and oxidation processes, as well as to the asymmetry in hydrothermal conditions between warming and cooling seasons. This suggests that the same temperature may correspond to different flux states during the warming and cooling phases (i.e., “hysteresis effect”)...
release time:
2026
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08
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21
Views：4
BackgroundGrassland ecosystems are an important component of the global carbon cycle, playing a critical role in soil carbon sequestration, water conservation, and biodiversity maintenance. However, arid and semi-arid grasslands are highly sensitive to fluctuations in rainfall and grazing disturbances. Short-term, intense rainfall can rapidly alter soil moisture, thereby influencing plant growth, microbial activity, and ecosystem carbon exchange; meanwhile, grazing intensity further modulates this response by adjusting vegetation structure and soil water-holding capacity. Although previous stu...
release time:
2026
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07
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18
Views：1
Research BackgroundForest carbon sequestration is an important pathway for mitigating global climate change. The temperate forests in Northeast China cover a vast area and store substantial carbon, playing a crucial role in the nation’s carbon balance and regional climate regulation. Therefore, accurately assessing their carbon sink capacity is of great significance. However, estimating forest carbon sinks does not simply yield a single numerical value. Observation methods, sampling timing, spatial heterogeneity, and measurement errors in component analysis can all affect the reliability of th...
release time:
2026
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06
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29
Views：0
Research BackgroundNatural wetlands serve as significant carbon sinks. The long-term inundation conditions slow down the decomposition of organic matter, allowing large amounts of carbon to accumulate in the soil. As a result, wetlands play a crucial role in the global carbon cycle and in regulating greenhouse gases. However, with the expansion of land development and food production, an increasing number of natural wetlands are being converted into paddy fields. This not only alters land use types but also reshapes soil moisture levels, redox conditions, and microbial communities, thereby aff...
release time:
2026
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06
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12
Views：0