Effects of Simulated Nitrogen Deposition on the Bacterial Community of Urban Green Spaces

Mo, Lingzi; Zanella, Augusto; Chen, Xiaohua; Peng, Bin; Lin, Jiahui; Su, Jiaxuan; Luo, Xinghao; Xu, Guoliang; Squartini, Andrea

doi:10.3390/app11030918

Cited by 6 publications

(2 citation statements)

References 61 publications

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“…Our reasoning on pH is also based on the fact that it can profoundly affect the bacterial communities which on a lower ecological level, it could in turn affect the soil faunal components. In this regard, our data can be compared with a parallel analysis that we carried out from the same experiment and setup, in which we analyzed soil bacterial communities by culture-independent 16S DNA metabarcoding (Mo et al, 2021), also finding a dramatic drop in microbial diversity and evenness in a dose and timedependent fashion. Thus, the relevance of pH as a factor that could act in this sense, is supported by such prior analysis of the bacterial communities on the very same plots, in which we demonstrated the parallel effects on the bacterial trophic level, which is consistent with those displayed on arthropods described in the present study.…”

Section: The Effect Of Nitrogen Addition On Soil Fauna Community Structurementioning

confidence: 99%

Threshold Reaction of Soil Arthropods to Simulative Nitrogen Deposition in Urban Green Spaces

Zhang

et al. 2021

Front. Ecol. Evol.

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Sustained nitrogen (N) deposition has a wide-ranging impact on terrestrial ecosystems. However, still little attention has been paid to responses of urban soil fauna to the increasing N deposition. To clarify such effects on the soil properties and soil fauna in typical urban lawns (featuring Cynodon dactylon vegetation), a control experiment was conducted for 1 year, in which NH4NO3 was added as the external N source with four treatments of N addition: N0 (i.e., only water), N1 (50 kg N ha–1 yr–1), N2 (100 kg N ha–1 yr–1), N3 (150 kg N ha–1 yr–1). Results showed that N additions influence soil faunal communities in the urban lawns soil. The relative abundance of Oribatida increased with the N treatment level, partially replacing the more sensitive Collembola. Significant differences in the Shannon-Wiener and Margalef indices (p < 0.01) supported this statement. Although higher doses of N addition showed adverse effects on soil fauna communities, low N inputs increased the soil fauna diversity and richness, especially at 5–10 cm depth. A threshold effect appears to exist: low N addition (<25 kg N ha–1) did not negatively affect pedofauna structure and composition, while in the range from these values up to 50 kg N ha–1, the composition of the soil fauna underwent major changes which were confirmed by the decline of biodiversity indices. These changes are accompanied by the decreased pH values with increasing N inputs.

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Section: The Effect Of Nitrogen Addition On Soil Fauna Community Structurementioning

confidence: 99%

Threshold Reaction of Soil Arthropods to Simulative Nitrogen Deposition in Urban Green Spaces

Zhang

et al. 2021

Front. Ecol. Evol.

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“…Nitrogen addition has a negative impact on bacterial richness and diversity in urban green space. The decrease in biodiversity induced by N deposition may pose a serious threat to the stability of urban soil ecosystems, which emphasizes the necessity of thorough and concerted studies to prompt adequate policies to counteract these globally increasing threats [4]. Phosphorus removal from phosphorus-enriched soils (PES), such as agricultural lands, grasslands, and phosphate mining regions, is a major cause of eutrophication in aquatic environments and an increasing environmental problem worldwide.…”

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Editorial for Special Issue “Environmental Factors Shaping the Soil Microbiome”

Anandham

2021

Applied Sciences

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Soil is a complex system consisting of various abiotic and biotic factors interacting among themselves in a particular time period. These biotic factors are particularly affected by a large number of disturbances or perturbations occurring in the micro-niches. Soil microbiome is the paramount biotic factor responsible for nutrient cycling that in turn determines soil health and quality. However, there are limitations in studying soil systems as there are a number of unknown boxes that need to be checked before understanding their full-fledged contribution to the environment. The microbial diversity in the soil can be affected by salinity, contaminant, fertilization, nutrient accumulation, and cultivation practices. Additionally, plants can also benefit from these changes in microbial community composition, and novel microbial isolates can be used for enhancing their growth under various stress conditions. Collectively, this Special Issue includes various studies that determine key abiotic and biotic factors that can result in changes in microbial community composition in the soil system. These studies are carried out in specified environmental niches rather than microcosms, which provides a broader context in which to understand microbial dynamics.

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Characterizing suburban soil and microbial properties along a soil age chronosequence

Suratt,

Behl,

Hong

et al. 2024

Ecosphere

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Rapid urbanization is drastically altering ecosystem processes in landscapes around the world. In particular, suburban residential neighborhoods comprise novel ecosystems with water and nutrient inputs that differ greatly from the surrounding land area. These impacts generate concern over the sustainability of urban ecosystems, especially whether they will be characterized by net carbon gain or loss over time. To address this knowledge gap, we established a chronosequence of residential yards in Southern California to test how urban soils change after development. We predicted that urbanized soils would experience shifts in physical characteristics and microbial function over time consistent with ecological succession theory, but residential soils would maintain novel moisture and nutrient regimes compared to undeveloped soils, never “recovering” to a pre‐developed state. We compared different vegetation types to quantify impacts of homeowner landscaping choices and characterized yard soils and their microbial communities. We found that yard soils were nutrient‐ and moisture‐enriched compared to an adjacent undeveloped ecosystem, and turfgrass was associated with higher levels of water and nitrogen. Despite high respiration rates, yard soils accumulated carbon and nitrogen over time. We conclude that suburban residential soils comprise dynamic and heterogeneous ecosystems that are highly influenced by landscaping choices and management practices, and warrant closer study at small management‐relevant scales.

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Effects of Simulated Nitrogen Deposition on the Bacterial Community of Urban Green Spaces

Cited by 6 publications

References 61 publications

Threshold Reaction of Soil Arthropods to Simulative Nitrogen Deposition in Urban Green Spaces

Threshold Reaction of Soil Arthropods to Simulative Nitrogen Deposition in Urban Green Spaces

Editorial for Special Issue “Environmental Factors Shaping the Soil Microbiome”

Characterizing suburban soil and microbial properties along a soil age chronosequence

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