Soil carbon and nitrogen availability are key determinants of soil microbial biomass and respiration in forests along urbanized rivers of southern China

Mgelwa, Abubakari Said; Hu, Ya-Lin; Wang, Xu; ZhiQiang, Ge; Yu, Tan-Wei

doi:10.1016/j.ufug.2019.05.013

Cited by 28 publications

(10 citation statements)

References 53 publications

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“…The contents of MBC and MBN decreased with soil depth in all sites, which is consistent with findings of the recent studies (Feng et al, 2019;Mgelwa et al, 2019). This result may be related to the decrease of the substrate input of plant residues (such as roots and secretions) reduced with soil depth, which directly caused the MBC and MBN contents with soil depth (Wichern et al, 2003).…”

Section: Response Of Soil Microbial Biomass To Restoration Of Reclaimed Marshessupporting

confidence: 91%

Responses of Soil Microbial Biomass and Enzyme Activities to Natural Restoration of Reclaimed Temperate Marshes After Abandonment

Wang

Sun

et al. 2021

Front. Environ. Sci.

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Restoration of reclaimed marshes has great effects on soil biological processes. However, the responses of soil microbial properties (microbial biomass and enzyme activities) to natural restoration of reclaimed marshes is poorly studied, especially in a long restoration chronosequence. This study assessed the responses of soil microbial properties to natural restoration and investigated the relationships between soil microbial properties and soil physico-chemical and plant properties. We selected a restoration chronosequence (1, 4, 8, 13, 17, 27 years) after farmland abandonment, a soybean field, and a natural marsh in Sanjiang Plain, northeast China. For each site, we analyzed the soil microbial biomass carbon and nitrogen (MBC and MBN), four enzymes (β-glucosidase, invertase, catalase, urease) activities, soil physico-chemical properties at 0–50 cm depths, and plant properties (biomass, height, and coverage). The MBC and MBN contents increased with restoration time, but MBN content slowed down after 8 years of restoration. After 27 years of restoration, the soil MBC and MBN contents were 15.7 and 3.2 times of those in the soybean field, but the largest contents of MBC and MBN in the restored sites were 7.78%, 27.76% lower than those in natural marshes, respectively. Moreover, soil enzyme activities and the geometric mean of enzymatic activities (GME) also increased with restoration but slowed down after 13 years of restoration. After 27 years of restoration, the GME was 2.9 times than that in the soybean field, but the largest GME in the restored sites was 31.15% lower than that in the natural marsh. MBC and MBN contents, soil enzyme activities, and GME had significant relationships with soil C:N ratio, organic carbon, nutrients (total nitrogen, available nitrogen, total phosphorus), bulk density, moisture content, pH, plant properties, (i.e. biomass, height, and coverage) (p < 0.01). Redundancy analysis revealed that soil C:N ratio, pH, moisture content, total nitrogen and phosphorus were main factors affecting MBC and MBN contents and enzyme activities. In conclusion, soil microbial properties can respond positively to the natural restoration process of the reclaimed marshes and were significantly correlated with specific parameters of soil physico-chemical and plant properties.

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Section: Response Of Soil Microbial Biomass To Restoration Of Reclaimed Marshessupporting

confidence: 91%

Responses of Soil Microbial Biomass and Enzyme Activities to Natural Restoration of Reclaimed Temperate Marshes After Abandonment

Wang

Sun

et al. 2021

Front. Environ. Sci.

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“…High P contents in urban areas are usually explained by fertilization, stormwater or feces of domestic animals [ 59 , 60 ], but for the Murmansk soils, the effect of the mining activities can also be considerable [ 61 ]. The combined effect of C, N, and P inputs increases the stoichiometric C/N/P ratio with a considerable effect on soil microbiome [ 58 , 62 ] which is supported by high correlation values r = 0.68–0.95. In the urban soils of Murmansk, a decrease in the number of gene copies of all groups of microorganisms was noted in comparison with the natural soil.…”

Section: Discussionmentioning

confidence: 98%

“…In the investigated MUR-NR site, however, SOC content in the topsoil O horizon was much higher than in the urban sites due to slow decomposition of the plant residuals in Subarctic conditions resulting in peat formation. An additional N input identified by a lower C/N ratio is also a typical feature for urban soils [ 45 , 58 ]. High P contents in urban areas are usually explained by fertilization, stormwater or feces of domestic animals [ 59 , 60 ], but for the Murmansk soils, the effect of the mining activities can also be considerable [ 61 ].…”

Section: Discussionmentioning

confidence: 99%

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Korneykova

Vasenev

Никитин

et al. 2021

IJERPH

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Urbanization in the Arctic results in considerable and still poorly known environmental consequences. The effect of urbanization on soil microbiome—an ecosystem component highly sensitive to anthropogenic disturbance—remains overlooked for the Arctic region. The research compared chemical and microbial properties of the natural Podzol soils and urban soils of Murmansk—the largest Arctic city. Particular attention was given to the profile distribution, which is almost completely ignored by most microbial studies. Soil microbiome was investigated by the quantitative indicators based on fluorescence microscopy (microbial biomass) and PCR real-time methods (amount of rRNA genes copies of archaea, bacteria, and fungi). The principal changes in urban soils’ properties compared to the natural references included a shift in pH and an increase in C and nutrients’ contents, especially remarkable for the subsoil. The numbers of rRNA genes copies of archaea, bacteria, and fungi in urban topsoils (106–1010, 109–1010, and 107–109, respectively) were lower than in Podzol; however, the opposite pattern was shown for the subsoil. Similarly, the total microbial biomass in urban topsoils (0.55–0.75 mg g−1) was lower compared to the 1.02 mg g−1 in Podzols, while urban subsoil microbial biomass was 2–2.5 times higher than in the natural conditions. Both for urban and natural soils and throughout the profiles, fungi were dominated by mycelium forms; however, the ratios of mycelium–spores were lower, and the amount of thin mycelium was higher in urban soils than in natural Podzols. Urbanization in the Arctic altered soil morphological and chemical properties and created a new niche for microbial development in urban subsoils; its contribution to biodiversity and nutrient cycling promises to become increasingly important under projected climate change.

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“…Soil microbial biomass activity is also used as one of the indicators of soil health (Sparling, 1997). The quantity of soil organic matter, microbial biomass N and potential C and N mineralization rates are variable within the types of landscapes in urban environments (Mgelwa et al, 2019; Warren, 2015). Overall, soil needs to be quantified using soil microbial diversity to determine the impact of anthropogenic activities (Gupta & Germida, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The chloroform fumigation–extraction (CFE) method has been widely applied to determine MBC and MBN concentrations in the soil (Černý et al, 2008; Mgelwa et al, 2019; Raiesi, 2012; Yang et al, 2010). The fumigation procedure lyses cells of microorganisms and releases biomass C and simultaneously does not introduce additional organic C sources from other soil components (Alessi et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Soil microbial biomass carbon and nitrogen in historic convent gardens under long‐term horticultural cultivation in Krakow, Poland

Gąsiorek

Halecki

2021

Soil Use and Management

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This paper evaluates the seasonal changes of microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) contents as an indicator of urban soil health. Our research was conducted in six horticultural urban soils in Krakow that have been cultivated for centuries. We investigated the temporal dynamics of microbial biomass C and N in soil samples from 0 to 20 cm depth taken in spring, summer and autumn. The study plots were placed in suburban areas as well as in the centre of the city to distinguish whether the detected effect of altered soil properties is similar to suburban areas. Soil microbial biomass was determined by the chloroform fumigation–extraction (CFE) method. The concentrations of MBC and MBN were measured in the field‐moist soil samples. MBC in the soil ranged from 226.5 to 742.7 mg kg−1 and MBN from 62.7 to 359.6 mg kg−1 expressed in dry mass. Repeated‐measures analysis of variance (ANOVAR, match‐model) was performed to test the main effects and interactions of temporal changes for MBC and MBN. There were significant differences only between MBN concentration in summer and autumn (p < .05). Principle component analysis (PCA) gave insightful results for the whole soil profile. Detrended canonical correspondence analysis (DCCA) indicated that the most explanatory variables in the studied time period were concentration of silt, total nitrogen, MBN and MBC content in the surface layer. Molar ratios of total organic carbon and total nitrogen (TOC:TN) indicated that microbial activity for C and N is enhanced by stoichiometry demands and therefore may be important for vegetation.

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Soil carbon and nitrogen availability are key determinants of soil microbial biomass and respiration in forests along urbanized rivers of southern China

Cited by 28 publications

References 53 publications

Responses of Soil Microbial Biomass and Enzyme Activities to Natural Restoration of Reclaimed Temperate Marshes After Abandonment

Responses of Soil Microbial Biomass and Enzyme Activities to Natural Restoration of Reclaimed Temperate Marshes After Abandonment

Urbanization Affects Soil Microbiome Profile Distribution in the Russian Arctic Region

Soil microbial biomass carbon and nitrogen in historic convent gardens under long‐term horticultural cultivation in Krakow, Poland

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