Season-dependent effect of snow depth on soil microbial biomass and enzyme activity in a temperate forest in Northeast China

Wu, Qiqian

doi:10.1016/j.catena.2020.104760

Cited by 22 publications

(7 citation statements)

References 70 publications

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“…Thus, our results show that lower snow cover significantly reduced soil ammonium-N concentration during spring snowmelt in a meadow steppe of China. However, the increases in N availability in the snow-free plots were inconsistent with other studies conducted in temperate or boreal forests [ 19 , 27 , 44 , 50 ]. The more frequent freeze–thaw cycles in the snow-removal treatment could accelerate the fragmentation of litter [ 51 , 52 ], soil aggregates [ 41 , 53 , 54 ], inactive fine roots [ 55 , 56 ], and soil microorganisms [ 57 , 58 ] and could release soluble substances into the soil, thereby enhancing the content of soil N.…”

Section: Discussioncontrasting

confidence: 94%

“…In addition, our findings show that lower snow cover decreased soil NH 4 + concentration and meanwhile significantly decreased soil MBC and MBN during the spring snowmelt ( Table 1 ), which is consistent with the observations found in alpine forest ecosystems [ 28 , 42 ] and in high alpine grassland [ 11 ]. This shows that decreases in snow cover may potentially affect soil nutrient availability and microbial properties by altering the environmental factors (i.e., soil temperature and freeze–thaw cycle) in cold ecosystems [ 43 , 44 ]. Changes in the microbial community further activated microbial N cycling [ 45 ].…”

Section: Discussionmentioning

confidence: 99%

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Short-Term Snow Removal Alters Fungal but Not Bacterial Beta Diversity and Structure during the Spring Snowmelt Period in a Meadow Steppe of China

Liu

Zhang

2022

JoF

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Global climate change is altering the amounts of ice and snow in winter, and this could be a major driver of soil microbial processes. However, it is not known how bacterial and fungal communities will respond to changes in the snow cover. We conducted a snow manipulation experiment to study the effects of snow removal on the diversity and composition of soil bacterial and fungal communities. A snow manipulation experiment was carried out on the meadow steppe in Hulunbuir, Inner Mongolia, China, during the winter period October 2019–March 2020. Soil samples were collected from the topsoil (0–10 cm) in mid-March 2020 (spring snowmelt period). Snow removal significantly reduced soil moisture and soil ammonium concentration. Lower snow cover also significantly changed the fungal community structure and beta diversity. Snow removal did not affect the bacterial community, indicating that fungal communities are more sensitive to snow exclusion than bacterial communities. The relative importance analysis (using the Lindeman–Merenda–Gold method) showed that available nitrogen (AN), soil water content (SWC), total organic carbon (TOC), microbial biomass carbon (MBC), and microbial biomass nitrogen (MBN) together explained 94.59% of the variation in soil fungal beta diversity, where AN was identified as the most important predictor. These finding provide insights into potential impacts of climate warming and associated reduced snow cover on soil microbial communities and processes.

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Section: Discussioncontrasting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Short-Term Snow Removal Alters Fungal but Not Bacterial Beta Diversity and Structure during the Spring Snowmelt Period in a Meadow Steppe of China

Liu

Zhang

2022

JoF

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“…Comparing the soil enzyme activities of the five typical site types of aggregates, its value showed the same trend as carbon and nitrogen abundance, with NF, CF, and SF being significantly higher than those of ST and AL. Most scholars now believe that soil enzyme activity is influenced by a combination of key physical and chemical properties of soil, soil microbial load, and soil organic matter content (Hsiao et al, 2018; Wu, 2020; Xu et al, 2021). In this study, the carbon and nitrogen abundance of each particle size agglomerate was highly significantly correlated with soil LAP content (Figure 5), and the significant difference in the LAP of each particle size agglomerate under the typical land use in the small watershed may be the main reason for the difference in carbon and nitrogen content.…”

Section: Discussionmentioning

confidence: 99%

Impact of typical land use type on the stability and content of carbon and nitrogen of soil aggregates in western Hubei

Luo,

Xia,

Xia

et al. 2023

Ecosphere

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In order to investigate the characteristics of soil structural stability and the factors influencing it under typical land use types in the karst region of western Hubei, soil samples were collected from five land use types (natural mixed forest [NF], cypress forest [CF], stone dike terrace [ST], stone dike forest [SF], and abandoned land [AL]) in Xialaoxi to analyze the particle size distribution of aggregates, structural stability, and the distribution characteristics of carbon, nitrogen, and extracellular enzyme contents. The results showed that the aggregates of NF, CF, SF, and AL were dominated by >2‐mm aggregates, while ST showed mostly 2–0.25‐mm aggregates. The mean weight diameter (EMWD) and the geometric mean diameter (EGMD) of mechanical aggregates showed a trend of CF > NF > SF > AL > ST, whereas the erodibility factor K showed an opposite trend. The total organic carbon (TOC), labile organic carbon (LOC), and total nitrogen (TN) contents of aggregates of each particle size were significantly higher in NF and CF than in ST and AL under the five land types. The content of available nitrogen (AN) was highest in NF and ST. The content of carbon and nitrogen and extracellular hydrolases (β‐glucosidase [BG], cellulose disaccharide hydrolase [CBH], β‐N‐acetyl‐aminoglucosidase [NAG], and leucine aminopeptidase [LAP]) in soil aggregates were mainly concentrated in <0.25–0.053‐mm aggregates. The variation in carbon and nitrogen abundance of each particle size agglomerate mainly originated from the LAP content of that particle size agglomerate and showed significant correlation. The partial least squares path models (PLS‐PM) showed that the main influences on the stability of soil aggregates in small watersheds were land use types, soil physical properties, carbon and nitrogen abundance, and extracellular enzyme activity. In conclusion, the structural stability of soil aggregates in Xialaoxi watershed is the result of the interaction between human disturbance and soil nutrient self‐cycling. In general, NF and CF have better soil aggregate stability and are conducive to soil carbon and nitrogen accumulation, whereas for later development and management of SF, ST, and AL sample plots, scientific cultivation means should be adopted, and attention should be paid to long‐term carbon and nitrogen accumulation and conservation.

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“…Previous research has demonstrated that after the removal of the snow-cover, frequent freeze-thaw cycles caused the death of soil microorganisms, which resulted in the temporary release of enzymes and nutrients. This fundamentally reduced the source of soil enzymes and constrained enzyme activity ( Wu, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Snow-cover loss attenuates the effects of N addition on desert nutrient cycling and microbial community

et al. 2023

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Desert ecosystems are sensitive to nitrogen (N) deposition. Considering snow is an important source of soil water, which is vital for plant growth and the biogeochemical cycle in desert areas. The effects of N deposition on biological soil crusts (BSCs) could be impacted by the removal of snow-cover. Here, we established a split-plot experiment in the Gurbantunggut Desert to examine the effects of snow-cover treatments on soil nutrients, enzyme activities, and the bacterial community under various N addition. The removal of snow-cover reduced the soil nutrients with light and moderate N addition, it also reduced the activities of urease (URE) and alkaline phosphatase (PHOS). The structural equation model (SEM) result indicated that low soil moisture (SMO) under snow-uncover inhibited the bacterial community, particularly suppressed bacterial diversity. Additionally, N addition indirectly affected the bacterial community via modifications to soil nutrients, and soil organic matter (SOM) (P < 0.001) was the crucial factor. Snow-uncover weakened soil nutrient and enzyme responses to N addition, indicating that snow-cover removal reduced the sensitivity of the desert ecosystem to N deposition. The study highlights the critical role of snow-cover in the desert ecosystem, raising our awareness of the ecological risks of BSCs in future global change.

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Season-dependent effect of snow depth on soil microbial biomass and enzyme activity in a temperate forest in Northeast China

Cited by 22 publications

References 70 publications

Short-Term Snow Removal Alters Fungal but Not Bacterial Beta Diversity and Structure during the Spring Snowmelt Period in a Meadow Steppe of China

Short-Term Snow Removal Alters Fungal but Not Bacterial Beta Diversity and Structure during the Spring Snowmelt Period in a Meadow Steppe of China

Impact of typical land use type on the stability and content of carbon and nitrogen of soil aggregates in western Hubei

Snow-cover loss attenuates the effects of N addition on desert nutrient cycling and microbial community

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