Soil microbial biomass carbon stock and its relation with climatic and other environmental factors in forest ecosystems: A review

Das, Sujit; Deb, Sourabh; Sahoo, Snehasudha S.; Sahoo, Uttam Kumar

doi:10.1016/j.chnaes.2022.12.007

Cited by 20 publications

(7 citation statements)

References 140 publications

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“…Soil organic carbon acts as a substrate and energy source for microbial biomass growth and activity, with greater differences observed for SOC in zI between the treated and control plots. In fact, soil microbial biomass is mainly found in organic matter and is essential for decomposition and formation of the soil carbon pool, which is used as an indicator of soil quality [70,71]. These results were correlated by Spearman (Figure 9), which showed a clear correlation in the SOC content (r = 0.85) when the data were examined globally between treatment and control, rather than when they were examined comparing zI and zII (r = −0.041).…”

Section: Discussionmentioning

confidence: 99%

The Short-Term Effects of Heavy Thinning on Selected Soil Carbon Pools and Microbial Activity in a Young Aleppo Pine Forest

Lull,

Gil-Ortiz,

Bautista

et al. 2024

Forests

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Pinus halepensis Miller is a widespread tree species in the western Mediterranean basin, where very dense monospecific stands can be found, especially in natural regeneration after forest fires. Silvicultural thinning can reduce the competition of trees for natural resources and favour their development, although its effect depends on the habitat. The present study aims to know the effects on the soil at the physicochemical and microbiological levels after a heavy thinning in a young pine forest stand with a high stocking density. The stand is on a slope where the soil depth tends to decrease with altitude, and shows changes in its physicochemical properties between the upper and lower zones. Several soil carbon fractions (i.e., soil organic carbon (SOC), water-soluble organic carbon (WSOC), and microbial biomass carbon (MBC)), microbial activity (basal soil respiration (BSR)) and enzyme activities (acid phosphatase (AP) and urease (UA)) were analysed at specific dates over a period of about five years after a heavy thinning. The changes in organic matter content were abrupt in the slope, conditioning the observed differences. It is highlighted that the SOC and WSOC contents in the mineral soil were 2.5- and 3.5-fold significantly higher, respectively, in the upper shallow zone compared to the lower deeper zone. This was also reflected in significantly higher levels of gravimetric water content (GWC) and MBC (both about 1.4-fold higher), with higher levels of BSR and UA, and 2.5-fold significantly higher levels of AP. As a result, most of the properties studied showed no significant differences between the thinning treatment and the untreated control. Results varying between dates, with a strong dependence on climate (soil temperature and humidity) of WSOC and UA. It can be concluded that the heavy thinning applied in this short-term case study favoured the growth conditions of the pine without negatively affecting the soil properties studied.

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Section: Discussionmentioning

confidence: 99%

The Short-Term Effects of Heavy Thinning on Selected Soil Carbon Pools and Microbial Activity in a Young Aleppo Pine Forest

Lull,

Gil-Ortiz,

Bautista

et al. 2024

Forests

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“…This may be because forest fires reduce the stability of soil microorganisms [139], which use genetic variation to adapt to external interference and maintain the relative stability of community composition and structure to improve the resistance and resilience of soil microbial systems [140,141]. The carbon and nitrogen contents in the permafrost area decrease [128,129] with increasing fire intensity, and the carbon and nitrogen contents decrease with increasing soil depth [132]. When we study the microbial carbon and nitrogen content after forest fires, soil depth should be considered comprehensively.…”

Section: Discussionmentioning

confidence: 99%

“…Fire severity can alter factors such as the permafrost environment and soil organic matter (SOM) content [126,127], the SOM content decreases with increasing fire intensity and exacerbates the degradation of permafrost [75], affecting the survival and development of soil microorganisms [75]. The levels of MBC and MBN in the soil decrease with increasing fire severity [128,129]. For example, in Alaska, the contents of MBC and MBN were highest in unburned areas, followed by lightly burned areas, and lowest in severely burned areas [130].…”

Section: Effect Of Fire Severity On Soil Mbc and Mbnmentioning

confidence: 99%

Effects of Forest Fires on Boreal Permafrost and Soil Microorganisms: A Review

Liu,

Li,

et al. 2024

Forests

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The frequency of forest fires has increased dramatically due to climate change. The occurrence of forest fires affects the carbon and nitrogen cycles and react to climate change to form a positive feedback mechanism. These effects further impact the distribution of microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) and the soil microbial community structure. In addition, permafrost degradation can significantly affect the microorganisms in the soil. Based on these findings, this review examines the effects of fire intensity and post-fire recovery time on permafrost, the soil microbial community, MBC, MBN, and their interrelationships. This review demonstrated that (1) fires alter the condition of surface vegetation, reduce the organic layer thickness, redistribute snow, accelerate permafrost degradation, and even lead to permanent changes, where the restoration of the pre-fire state would require several decades or even centuries; (2) soil microbial community structure, soil MBC, and MBN negatively correlate with fire intensity, and the effects become more pronounced with increasing fire intensity; and (3) the structural diversity and stability of the soil microbial community were improved with time, and the amount of MBC and MBN increases as the years after a fire go by; it would still take more than ten years to recover to the pre-fire level. However, the relationship between permafrost degradation and soil microbes after forest fires is still unclear due to a lack of quantitative research on the mechanisms underlying the changes in soil microorganisms resulting from fire-induced permafrost degradation. Therefore, expanding quantitative studies and analyses of the mechanisms of interactions between forest fires, permafrost, and soil microorganisms can provide a scientific basis for understanding ecosystem carbon pools and dual-carbon targets in Arctic–boreal permafrost regions.

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“…熏蒸过程中气态氯仿破坏微生物细胞膜结构, 从而促进细胞内碳的释放 [46] , 利用K 2 SO 4 溶液浸提熏蒸和未熏蒸土样中的溶解碳, 因此该方法主要提取的是完整细胞体内(包括活微生物细胞和刚死亡细胞)的微生物碳 [38,46] , 即主要源于土壤细菌、真菌、放线菌等的活性组分的碳 [47] . 由于微生物残体(主要包括细胞碎片、胞外酶、胞外聚合物等)不具有完整细胞结构 [9,48] 、残体组分常与土壤矿物紧密结合具有稳定性 [5] 、浸提液难以提取具有高分子量和高疏水性的残体组分 Rousk和Bååth [51] 通过测定麦角甾醇中 14 C-乙酸的掺入量估算真菌的生长速率为0.0003~0.0014 h -1 .…”

Section: 方法学相对偏差unclassified

微生物活体碳对草地土壤有机碳贡献的方法评估

Tian,

Cui,

et al. 2024

Chin. Sci. Bull.

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Soil microbial biomass carbon stock and its relation with climatic and other environmental factors in forest ecosystems: A review

Cited by 20 publications

References 140 publications

The Short-Term Effects of Heavy Thinning on Selected Soil Carbon Pools and Microbial Activity in a Young Aleppo Pine Forest

The Short-Term Effects of Heavy Thinning on Selected Soil Carbon Pools and Microbial Activity in a Young Aleppo Pine Forest

Effects of Forest Fires on Boreal Permafrost and Soil Microorganisms: A Review

微生物活体碳对草地土壤有机碳贡献的方法评估

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