Effects of Nitrogen Deposition on Nitrogen-Mineralizing Enzyme Activity and Soil Microbial Community Structure in a Korean Pine Plantation

He, Wenyuan; Zhang, Mengmeng; Jin, Guangze; Sui, Xin; Zhang, Tong; Song, Fuqiang

doi:10.1007/s00248-020-01595-6

Cited by 48 publications

(20 citation statements)

References 64 publications

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“…In addition, according to Pearson correlation analyses, the 20 most abundant bacterial phyla were mainly influenced by NH 4 + -N, NO 3 − -N, TK, MBC, MBN, TC, MC ( Figure 4 ), and Proteobacteria, Acidobacteria, Bacteroidetes, Chlroflexi, Gemmatimonadetes, Latescibacteria, Actinobacteria, Planctomycetes, Armatimonadetes, Elusimicrobia, and Chlorobi all showed significantly negative correlations with soil nutrients. This is inconsistent with previous studies, for example Proteobacteria are eutrophic microorganisms, which have been shown a positive correlation with soil nutrients ( He et al, 2021 ). This may be because at the bacterial phylum level, not all Proteobacteria may be constrained by nutrient content when nutrient availability is adequate.…”

Section: Discussioncontrasting

confidence: 99%

Composition and diversity of soil bacterial communities under identical vegetation along an elevational gradient in Changbai Mountains, China

Dai

2022

Front. Microbiol.

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Soil bacteria play important roles in biogeochemical cycling and biodiversity in mountain ecosystems. Past studies have investigated the bacterial community composition and diversity in elevation gradations covered by different vegetation types, but for a better assessment of elevation effects, here we studied bacterial communities in soil under identical vegetation cover. High-throughput amplicon sequencing of the V3-V4 region of bacterial 16S rDNA was used to investigate the diversity and composition bacterial communities in soil from 700 to 1,000 m above sea level collected on the north slope of Changbai Mountains, Northeast China. Obviously differences (p < 0.05) in soil physicochemical parameters (i.e., total nitrogen, nitrate and ammonium nitrogen, soil moisture content, available potassium, microbial biomass carbon and nitrogen) were observed at different elevations. Soil bacterial abundance indices (Richness, Chao1, ACE) differed significantly along the elevation gradient, whereas the Shannon index remained unchanged. Principal Coordinates Analysis indicated separated soil bacterial communities of the different elevations. The dominant phyla in all soil samples were Proteobacteria, Acidobacteria, Actinobacteria, Verrucomicrobia, and Bacteroidetes, which in combination reached 80%–85%. Soil pH to some extend related to soil bacterial community along altitude gradations. The relative abundance of a multiple phyla was negatively affected by the soil nutrients, such as ammonium and nitrate nitrogen, available potassium, soil moisture content, available phosphorus, microbial biomass nitrogen and soil organic C. The strongest effects were seen for Proteobacteria. The pH either positively or negatively correlated with specific genera. The soil bacterial function differed significantly among four elevations. The chemoheterotrophy, aerobic chemoheterotrophy and nitrification were the most dominant functions of soil bacteria among four elevations. Overall, the changes in soil physicochemical properties with elevation are important in shaping the bacterial diversity, composition and function in soil with the same above-ground vegetation of Changbai Mountains.

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Section: Discussioncontrasting

confidence: 99%

Composition and diversity of soil bacterial communities under identical vegetation along an elevational gradient in Changbai Mountains, China

Dai

2022

Front. Microbiol.

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“…The increased fungal α-diversity at both sites may be explained by the following reasons: (i) N addition enhanced the plant net primary productivity of the tropical forest ( Du and de Vries, 2018 ; Liang et al, 2020 ), leading to more plant-derived resources for soil fungal growth; (ii) the rate of N addition (∼100 kg N ha –1 yr –1 ) likely caused an intermediate disturbance and led to many vacant ecological niches that facilitate fungal colonization, according to the intermediate disturbance hypothesis ( Zhang X. et al, 2018 ); (iii) the internal pH regulatory mechanism of soil fungi can make their cells maintain a relatively neutral pH ( Gross and Robbins, 2000 ), and thus, the acidic soil induced by N addition could result in more abundant acidophilic or acid-tolerant fungi in the studied forest. However, different response patterns were found in the N-limited temperate and boreal forests, which indicated that soil fungal α-diversity or abundance was decreased or not significantly affected by N addition ( Xia et al, 2020 ; Zhou et al, 2020 ; He W. et al, 2021 ). We presume that the discrepancies might originate from the differences in the initial N status of the forest ecosystems.…”

Section: Discussionmentioning

confidence: 93%

Adaptation of Soil Fungal Community Structure and Assembly to Long- Versus Short-Term Nitrogen Addition in a Tropical Forest

Jiao

Tan

et al. 2021

Front. Microbiol.

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Soil fungi play critical roles in ecosystem processes and are sensitive to global changes. Elevated atmospheric nitrogen (N) deposition has been well documented to impact on fungal diversity and community composition, but how the fungal community assembly responds to the duration effects of experimental N addition remains poorly understood. Here, we aimed to investigate the soil fungal community variations and assembly processes under short- (2 years) versus long-term (13 years) exogenous N addition (∼100 kg N ha–1 yr–1) in a N-rich tropical forest of China. We observed that short-term N addition significantly increased fungal taxonomic and phylogenetic α-diversity and shifted fungal community composition with significant increases in the relative abundance of Ascomycota and decreases in that of Basidiomycota. Short-term N addition also significantly increased the relative abundance of saprotrophic fungi and decreased that of ectomycorrhizal fungi. However, unremarkable effects on these indices were found under long-term N addition. The variations of fungal α-diversity, community composition, and the relative abundance of major phyla, genera, and functional guilds were mainly correlated with soil pH and NO3––N concentration, and these correlations were much stronger under short-term than long-term N addition. The results of null, neutral community models and the normalized stochasticity ratio (NST) index consistently revealed that stochastic processes played predominant roles in the assembly of soil fungal community in the tropical forest, and the relative contribution of stochastic processes was significantly increased by short-term N addition. These findings highlighted that the responses of fungal community to N addition were duration-dependent, i.e., fungal community structure and assembly would be sensitive to short-term N addition but become adaptive to long-term N enrichment.

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“…Soil enzyme activity is influenced by soil temperature, soil nutrients, microbial community, fertilization, and other factors ( Cheng et al, 2013 ; Díaz et al, 2021 ; Levakov et al, 2021 ; Tan et al, 2021 ). The activities of nitrogen cycle enzymes such as urease, protease, glutaminase, and catalase varied significantly under different nitrogen fertilizer treatments ( Cao et al, 2014 ; He et al, 2021 ; Li et al, 2021b ). Seasonal low temperatures or diurnal variations in temperature can have a significant impact on soil enzymes ( Viswanathan and Krishnan, 1962 ; Cao R. et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Effects of Temperature and Nitrogen Application on Carbon and Nitrogen Accumulation and Bacterial Community Composition in Apple Rhizosphere Soil

Zhang

Phillip

et al. 2022

Front. Plant Sci.

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Malus sieversii grows on the slopes of the Tianshan Mountains in Xinjiang where the difference in daily temperature is significant. In recent years, the rhizosphere soil health of Malus sieversii has been severely impacted by anthropogenic disturbance and pathogenic infestation. The soil nutrient content and soil microorganism diversity are the main components of soil health. Low temperature has negative effects on soil bacterial community structure by inhibiting the accumulation of carbon and nitrogen. However, the effects of temperature and nitrogen application on soil carbon and nitrogen accumulation and the bacterial community composition in the rhizosphere soil of Malus sieversii are unclear. We set two temperature levels, i.e., low temperature (L) and room temperature (R), combined with no nitrogen (N0) and nitrogen application (N1) to explore the response of plant carbon and nitrogen uptake, rhizosphere soil carbon and nitrogen accumulation and bacterial community composition to temperature and nitrogen fertilization. At the same temperature level, plant 13C abundance (P-Atom13C), plant 15N absolute abundance (P-Con15N), soil 15N abundance (S-Atom15N) and soil urease, protease and glutaminase activities were significantly higher under nitrogen application compared with the no-nitrogen application treatment. The bacterial community diversity and richness indices of the apple rhizosphere soil in the N1 treatment were higher than those in the N0 treatment. The relative abundances of Actinobacteria, Rhodopseudomonas, and Bradyrhizobium were higher in the LN1 treatment than in the LN0 treatment. Redundancy analysis (RDA) showed that plant 13C absolute abundance (P-Con13C) and plant 15N absolute abundance (P-Con15N) were the main factors affecting the soil bacterial community composition. In summary, Nitrogen application can alleviate the effects of low temperature stress on the soil bacterial community and is of benefit for the uptakes of carbon and nitrogen in Malus sieversii plants.

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Effects of Nitrogen Deposition on Nitrogen-Mineralizing Enzyme Activity and Soil Microbial Community Structure in a Korean Pine Plantation

Cited by 48 publications

References 64 publications

Composition and diversity of soil bacterial communities under identical vegetation along an elevational gradient in Changbai Mountains, China

Composition and diversity of soil bacterial communities under identical vegetation along an elevational gradient in Changbai Mountains, China

Adaptation of Soil Fungal Community Structure and Assembly to Long- Versus Short-Term Nitrogen Addition in a Tropical Forest

Effects of Temperature and Nitrogen Application on Carbon and Nitrogen Accumulation and Bacterial Community Composition in Apple Rhizosphere Soil

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