Response of fungal composition and diversity to simulated nitrogen deposition and manipulation of precipitation in soils of an Inner Mongolia desert steppe of Northern China

Jia, Meiqing; Liu, Chengbao; Li, Yang; Shuai, Xu; Han, Guodong; Huang, Jing; Jin, Beihong; Zou, Yu Xing; Zhang, Guogang

doi:10.1139/cjss-2016-0135

Cited by 6 publications

(10 citation statements)

References 8 publications

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“…Our results showed that the number of cultivable bacteria in treatment groups ranged from 37.33 × 10 4 to 48.94 × 10 4 CFU•g -1 in the 0.00-0.30 m soil layer (Figure 2), in agreement with the results of another study (Kurapova et al, 2012). The quantity of cultivable bacteria peaked in the layer of 0.00-0.10 m, and was lowest in the layer of 0.20-0.30 m; this is consistent with the results of the study on microbes by Liu (2014) and Jia et al (2016Jia et al ( , 2017 in the same plot. This phenomenon may strongly be associated with the shallow and dense root systems of the above-ground community and the high content of soil physical and chemical factors in the 0.00-0.10 m layer, as detailed in Jia et al (2017).…”

Section: Resultssupporting

confidence: 92%

“…The quantity of cultivable bacteria peaked in the layer of 0.00-0.10 m, and was lowest in the layer of 0.20-0.30 m; this is consistent with the results of the study on microbes by Liu (2014) and Jia et al (2016Jia et al ( , 2017 in the same plot. This phenomenon may strongly be associated with the shallow and dense root systems of the above-ground community and the high content of soil physical and chemical factors in the 0.00-0.10 m layer, as detailed in Jia et al (2017).…”

Section: Resultssupporting

confidence: 90%

“…In each plot, four cores were randomly taken with an auger (0.05 m diameter) from the 0.00-0.30 m layer. Every soil core was divided into five layers according to preliminary results (Jia et al, 2017), namely, 0.00-0.02, 0.02-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30 m. Soil samples at the same layer from each plot were mixed evenly in a plastic bag to prepare a composite sample. Then, each sample was divided into two sub-samples and transported to the lab at 4 ℃; one part was used for soil physicochemical measurements, and the other was stored at -20 ℃ for soil microbial analysis.…”

Section: Soil Sampling and Measurement Of Soil Physicochemical Indicesmentioning

confidence: 99%

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Effects of Simulated Nitrogen Deposition and Precipitation Manipulation on Soil Microorganisms in the Desert Steppe of Northern China

Jia

Huang

Yang

et al. 2019

Rev. Bras. Ciênc. Solo

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Soil microorganisms are influenced by climate change. However, the effect of climate change on soil cultivable bacteria are unclear. In this study, the composition and diversity of the soil cultivable bacterial community were explored by a dilution-plate method, PCR, and 16S rRNA sequencing in a desert steppe of northern China after repeated NH 4 NO 3 amendments and precipitation manipulation for seven years. The experimental treatments were as follows: control (CK), N addition (+N), N addition plus water addition (+N+W), and N addition plus water reduction (+N-W). Among the treatment groups, 11 genera and 17 bacterial species were isolated. Nitrogen addition and precipitation manipulation significantly increased the number of cultivable bacteria in the 0.00-0.30 m layer compared to CK. Compared to +N treatment, the +N+W and +N-W treatments had no significant impact on the number of cultivable bacteria. Compared to the CK community, bacterial communities exposed to the other three treatments did not show shifts in the relative abundance of dominant genera and other cultivable bacteria, except for Pontibacter and Staphylococcus. The treatments +N+W and +N-W significantly modified the relative abundance of Pontibacter and Staphylococcus compared to the +N treatment. Available potassium and phosphorus, and moisture content contributed to the change in the composition of the cultivable bacterial community (p>0.05). Nitrogen addition and precipitation manipulation significantly decreased species richness in the 0.00-0.02 m layer, but they did not affect evenness and the Shannon-Wiener Index in the 0.00-0.30 m layer. This study provides insights into how the composition and diversity of the bacterial community is affected by climate change scenarios.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 90%

Section: Soil Sampling and Measurement Of Soil Physicochemical Indicesmentioning

confidence: 99%

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Effects of Simulated Nitrogen Deposition and Precipitation Manipulation on Soil Microorganisms in the Desert Steppe of Northern China

Jia

Huang

Yang

et al. 2019

Rev. Bras. Ciênc. Solo

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“…), Inner Mongolia Autonomous Region (IMAR), northern China ( Figure 1) (Lin et al, 2010b;Cao et al, 2013). The steppe is characterized by a semiarid continental monsoon climate with a short plant-growing period from May to September (Jia et al, 2017a). The mean annual temperature is 3.4 ℃, and the three highest monthly mean temperatures are 21.5, 24.0, 23.5 °C in June, July and August, respectively (Lin et al, 2010b).…”

Section: Study Sitementioning

confidence: 99%

“…The desert steppe ecosystem of Inner Mongolia, which comprises 10.7% of the region's grassland, is important for both livestock production and preservation of biodiversity (Jia et al, 2017a). Grazing has been one of the most important land-use methods across all Inner Mongolian steppe types for thousands of years.…”

Section: Introductionmentioning

confidence: 99%

Effect of different grazing intensities on bacterial community composition and diversity in rhizosphere and non-rhizosphere soils in desert steppe of China

Zhang

Huang

Jia

et al. 2019

Chil. j. agric. res.

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Degradation and desertification are extremely significant environmental problems in arid and semi-arid grassland ecosystems. Long-term overgrazing is the most fundamental cause of grassland degradation. We investigated relationships between grazing intensity and bacterial communities in non-rhizospheric and rhizospheric soils in desert steppe, including 0-10, 10-20 and 20-30 cm depth soils, as well as Stipa breviflora Griseb., Cleistogenes songorica (Roshev.) Ohwi, Artemisia frigida Willd. and plant community rhizospheric soils. This involved simulating grazing intensities in a long-term localization experiment, using a randomized block design. The effects of grazing on non-rhizospheric soil bacterial abundance were reflected in the 0-10 cm layer, increasing under light grazing and decreasing rapidly under moderate and heavy grazing, mainly related to Bacillus. Bacterial abundance in dominant plant rhizosphere responded differently. In A. frigida Willd. Rhizosphere, it decreased with increasing grazing intensity (a trend repeated in mixed rhizosphere). Bacterial abundance in S. breviflora and C. songorica rhizosphere increased under light and decreased under moderate and heavy grazing. Thus, changes in the dominant plant rhizospheric bacterial community did not significantly affect bacterial abundance in mixed rhizosphere. Changes in the rhizospheric bacterial abundance mainly resulted from levels of the dominant species, Streptomyces and Arthrobacter. There were significantly different results for bacterial community structure. Specifically, grazing had a nonsignificant and significant impact on bacterial community structures in non-rhizospheric (F PERMANOVA = 1.38, p = 0.199) and rhizospheric (FPERMANOVA = 2.03, p = 0.012) soil, respectively, varying significantly among plants (FPERMANOVA = 1.9, p = 0.022). In conclusion, bacterial communities in rhizosphere were mainly affected by plant species and were more sensitive to changing grazing intensity than in non-rhizospheric soil.

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Plant property regulates soil bacterial community structure under altered precipitation regimes in a semi-arid desert grassland, China

et al. 2023

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Variations of precipitation have great impacts on soil carbon cycle and decomposition of soil organic matter. Soil bacteria are crucial participants in regulating these ecological processes and vulnerable to altered precipitation. Studying the impacts of altered precipitation on soil bacterial community structure can provide a novel insight into the potential impacts of altered precipitation on soil carbon cycle and carbon storage of grassland. Therefore, soil bacterial community structure under a precipitation manipulation experiment was researched in a semi-arid desert grassland in Chinese Loess Plateau. Five precipitation levels, i.e., control, reduced and increased precipitation by 40% and 20%, respectively (referred here as CK, DP40, DP20, IP40, and IP20) were set. The results showed that soil bacterial alpha diversity and rare bacteria significantly changed with altered precipitation, but the dominant bacteria and soil bacterial beta diversity did not change, which may be ascribed to the ecological strategy of soil bacteria. The linear discriminate analysis (LDA) effect size (LEfSe) method found that major response patterns of soil bacteria to altered precipitation were resource-limited and drought-tolerant populations. In addition, increasing precipitation greatly promoted inter-species competition, while decreasing precipitation highly facilitated inter-species cooperation. These changes in species interaction can promote different distribution ratios of bacterial populations under different precipitation conditions. In structural equation model (SEM) analysis, with changes in precipitation, plant growth characteristics were found to be drivers of soil bacterial community composition, while soil properties were not. In conclusion, our results indicated that in desert grassland ecosystem, the sensitive of soil rare bacteria to altered precipitation was stronger than that of dominant taxa, which may be related to the ecological strategy of bacteria, species interaction, and precipitation-induced variations of plant growth characteristics.

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Response of fungal composition and diversity to simulated nitrogen deposition and manipulation of precipitation in soils of an Inner Mongolia desert steppe of Northern China

Cited by 6 publications

References 8 publications

Effects of Simulated Nitrogen Deposition and Precipitation Manipulation on Soil Microorganisms in the Desert Steppe of Northern China

Effects of Simulated Nitrogen Deposition and Precipitation Manipulation on Soil Microorganisms in the Desert Steppe of Northern China

Effect of different grazing intensities on bacterial community composition and diversity in rhizosphere and non-rhizosphere soils in desert steppe of China

Plant property regulates soil bacterial community structure under altered precipitation regimes in a semi-arid desert grassland, China

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