Newly formed riparian microhabitats simplify bacterial community structure and diversity

Li, Jiajia; Li, Lijuan; Arif, Muhammad; Ding, Dongdong; Xin, Hu; Li, Changxiao

doi:10.1007/s11368-023-03454-6

Cited by 11 publications

(10 citation statements)

References 67 publications

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“…One study found that a neutral pH range was the ideal living environment for most methanotrophs (Rushworth et al, 2022). There are two mechanisms by which soil pH can affect the assembly of methanotrophic communities—by directly affecting the growth of methanotrophs or by indirectly influencing plants to form methanotrophic communities (Li, Lijuan, et al, 2023; Martin‐Guay et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…Soil samples were collected from the roots of woody plants in each quadrat using the monolith method (Gottel et al, 2011; Shakya et al, 2013). Rhizosphere soil is typically defined as the soil occurring within 4 mm of a root system (Boilard et al, 2019; Li, Arif, et al, 2023). After collecting five soil samples from each quadrat using the five‐point sampling method, the soil samples were mixed with five points of equal quality and retained using the quartering method (Ren et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

“…Ultraviolet spectrophotometry was used to determine the soil catalase activity (CAT), while the soil dehydrogenase activity (DHY) was determined via colorimetry using 2,3,5‐triphenyl‐tetrazolium chloride. Each measurement was repeated three times, and each sample had a matrix‐ and soil‐free control (Li, Arif, et al, 2023).…”

Section: Methodsmentioning

confidence: 99%

“…Methanotrophs play a fundamental role in many soils. While they are represented by both rare and abundant taxa, previous studies have often concerned only with the abundant taxa (Li, Arif, et al, 2023; Nazaries et al, 2018). However, latest research has highlighted the significance of rare taxa.…”

Section: Introductionmentioning

confidence: 99%

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Rare methanotrophs adapt to broader environmental gradients than abundant methanotrophs in the riparian zone of the Three Gorges Reservoir

Jiajia,

Arif,

Changxiao

2023

Land Degrad Dev

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Soil communities are intricately linked to ecosystem functioning. Uncovering the responses of rare and abundant taxa to environmental change is vital for understanding methanotrophic community assembly and ecosystem function. It is unclear what the proportions of the different taxa are in riparian soil and how environmental change may impact these, and thereby affect the structure and assembly of different communities. Considering both abundant and rare taxa, we investigated environmental thresholds and phylogenetic signals related to the ecological preferences of methanotrophic communities under complex environmental gradients, and explore the factors that influence their assembly. It has ecological significance for predicting how communities will gather in response to changing environmental conditions. It was found that methanotrophs had different ecological network patterns across land‐use types, with the network complexity of abundant taxa being higher in grasslands and woodlands than that of rare taxa. Different ecological preference thresholds and phylogenetic signals were observed between abundant and rare subcommunities in the riparian zone, with rare taxa possessing potentially broader environmental adaptation capabilities. Rare taxa were phylogenetically clustered closer together than abundant taxa. The assembly of abundant taxa was dominated by stochastic processes, whereas the assembly of rare taxa was dominated by deterministic processes. Soil pH played an important role in regulating the balance between the assembly processes of abundant and rare subcommunities. The deterministic assembly of rare taxa and the stochastic assembly of abundant taxa increased with pH values. We revealed the complexity of a co‐occurring ecological network, identified the mediators of methanotrophic community assembly, and examined the adaptability of rare and abundant methanotrophic species to different environmental gradients. These findings indicate that it is possible to predict the generation and maintenance of methanotrophic community diversity by studying how methanotrophs will respond to environmental changes in the riparian zone during vegetation restoration projects.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rare methanotrophs adapt to broader environmental gradients than abundant methanotrophs in the riparian zone of the Three Gorges Reservoir

Jiajia,

Arif,

Changxiao

2023

Land Degrad Dev

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“…Furthermore, the plants of L. obtusifolium that were treated with this concentration exhibited no growth inhibition and had optimal antioxidant enzyme activity, demonstrating that L. obtusifolium was able to grow under soils containing 300 mg/kg of Cr. It was shown that vegetation responds successfully to various factors [55][56][57][58][59].…”

Section: Trace Element Accumulation and Transport Capacity Of L Obtus...mentioning

confidence: 99%

Effects of Different Trace Elements on Ecophysiological Characteristics of Ligustrum obtusifolium Saplings

Cao

Arif

Cui

et al. 2023

Forests

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Phytoremediation is becoming more prevalent globally. Literature on phytoremediation strategies in western China is relatively scarce. The present research sought to fill this gap by examining the effects of trace elements such as Cd, Cr, Pb, and Zn on growth, physiological traits, tolerances, and accumulation characteristics in 2-year-old saplings of Ligustrum obtusifolium. The gradient of trace element concentration was determined by adding exogenous trace elements to the soil in a pot experiment: CK (no exogenous trace element), T1, T2, and T3 (Cd 0, 2, 5, and 10 mg/kg; Cr 0, 300, 500, and 700 mg/kg; Pb 0, 400, 800, and 1200 mg/kg; and Zn 0, 300, 500, and 1000 mg/kg, respectively). The results indicated that Chla, Chlb, and total Chls significantly decreased (p < 0.05) in the leaves of L. obtusifolium, with the lowest value obtained during soil treatment with T3. Along with the increase in trace element concentration, the net increase in height, root biomass, aerial biomass, and total biomass was reduced significantly. The net growth of L. obtusifolium under Cr stress did not differ significantly from that of CK at T1; however, the net growth of L. obtusifolium under Cr stress was considerably reduced at T2 and T3. The antioxidant enzyme activity of L. obtusifolium increased under different trace element stresses and first increased and then decreased as trace element levels increased. It was found that the SOD, POD, CAT, and APX activity of L. obtusifolium peaks at T2 under Cd and Zn stress in contrast to a peak at T1 under Cr and Pb stress. The contents of trace elements in L. obtusifolium roots, stems, and leaves increased along with the increase in soil trace element levels. Cr, Pb, and Zn threshold values can be set at 300 mg/kg, 400 mg/kg, and 300 mg/kg, respectively. This is carried out by using a reference index of the biomass of L. obtusifolium decreased by 10%, while the Cd threshold value needs to be further studied. L. obtusifolium would be an appropriate plant for phytoremediation of Cr-polluted soil, compared to Cd, Pb, and Zn absorption and accumulation. It showed optimal antioxidant enzyme activity and transfer ability under soil Cr contents of 300 mg/kg, and the growth of L. obtusifolium was not restricted. Therefore, L. obtusifolium was particularly suitable for phytoremediation of Cr pollution in areas in western China.

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Ecological-economic assessment of forest land degradation neutrality in the Indus River Basin of Pakistan

Arif,

Amin,

Zarif

et al. 2024

Environ Dev Sustain

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Newly formed riparian microhabitats simplify bacterial community structure and diversity

Cited by 11 publications

References 67 publications

Rare methanotrophs adapt to broader environmental gradients than abundant methanotrophs in the riparian zone of the Three Gorges Reservoir

Rare methanotrophs adapt to broader environmental gradients than abundant methanotrophs in the riparian zone of the Three Gorges Reservoir

Effects of Different Trace Elements on Ecophysiological Characteristics of Ligustrum obtusifolium Saplings

Ecological-economic assessment of forest land degradation neutrality in the Indus River Basin of Pakistan

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