Ecological assessment of groundwater ecosystems disturbed by recharge systems using organic matter quality, biofilm characteristics, and bacterial diversity

Voisin, Jérémy; Cournoyer, Benoît; Marjolet, Laurence; Vienney, Antonin; Mermillod‐Blondin, Florian

doi:10.1007/s11356-019-06971-5

Cited by 15 publications

(13 citation statements)

References 69 publications

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“…1 and S1). As performed for microbial GW assessment using artificial substrates (Mermillod-Blondin et al, 2019;Voisin et al, 2020), these wells were used to incubate passive samplers (see below) during 10 days for contaminant assessment of GW by stormwater infiltration (Pinasseau et al, 2019). The wells consisted in either polyvinyl chloride or methacrylate tubes (with a minimum internal diameter of 5.5 cm) perforated at their lower end (0.5 m) to allow an efficient hydraulic connection with the aquifer.…”

Section: Studied Sites and Experimental Designmentioning

confidence: 99%

Emerging polar pollutants in groundwater: Potential impact of urban stormwater infiltration practices

Pinasseau

Wiest

Volatier

et al. 2020

Environmental Pollution

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Section: Studied Sites and Experimental Designmentioning

confidence: 99%

Emerging polar pollutants in groundwater: Potential impact of urban stormwater infiltration practices

Pinasseau

Wiest

Volatier

et al. 2020

Environmental Pollution

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“…In fact, a number of bacterial taxa known to be aerophilic or microaerophilic, like Gallionellaceae were identified. This aspect suggests that Po Plain deep aquifers are not confined systems and element exchange might occur to a certain extent, as observed in other European aquifers (Bochet et al, 2020;Voisin et al, 2020).…”

Section: Discussionmentioning

confidence: 59%

Adaptation of Microbial Communities to Environmental Arsenic and Selection of Arsenite-Oxidizing Bacteria From Contaminated Groundwaters

et al. 2021

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Arsenic mobilization in groundwater systems is driven by a variety of functionally diverse microorganisms and complex interconnections between different physicochemical factors. In order to unravel this great ecosystem complexity, groundwaters with varying background concentrations and speciation of arsenic were considered in the Po Plain (Northern Italy), one of the most populated areas in Europe affected by metalloid contamination. High-throughput Illumina 16S rRNA gene sequencing, CARD-FISH and enrichment of arsenic-transforming consortia showed that among the analyzed groundwaters, diverse microbial communities were present, both in terms of diversity and functionality. Oxidized inorganic arsenic [arsenite, As(III)] was the main driver that shaped each community. Several uncharacterized members of the genus Pseudomonas, putatively involved in metalloid transformation, were revealed in situ in the most contaminated samples. With a cultivation approach, arsenic metabolisms potentially active at the site were evidenced. In chemolithoautotrophic conditions, As(III) oxidation rate linearly correlated to As(III) concentration measured at the parental sites, suggesting that local As(III) concentration was a relevant factor that selected for As(III)-oxidizing bacterial populations. In view of the exploitation of these As(III)-oxidizing consortia in biotechnology-based arsenic bioremediation actions, these results suggest that contaminated aquifers in Northern Italy host unexplored microbial populations that provide essential ecosystem services.

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“…The transformation of bacterial community structure in the rhizosphere of S. cannabina was affected by the single application of organic fertilizer with the type of nutrient utilization as the screening model. Among them, some widely reported organic matter degrading bacteria were significantly enriched ( Figures 3D, E ), such as Salinimicrobium and Gramella ( Yun et al., 2018 ; Voisin et al., 2020 ); meanwhile, Bacteroidia and Actinobacteria ( Gurushankara et al., 2019 ; Voisin et al., 2020 ) became the hub node of the bacterial co-occurrence network ( Figures 5B ; Tables S2–S5 ), and the mutual association in the bacterial co-occurrence network increased; in addition, the functional proportion of chemoheterotrophic and phototrophic in rhizosphere bacterial community of S. cannabina was significantly increased ( Figure 4 ; Table S1 ). The decomposition and utilization of soil organic matter forms the basis for soil bacteria to exert more biogeochemical cycling functions ( Condron et al., 2010 ).…”

Section: Discussionmentioning

confidence: 99%

Effect and mechanism of the improvement of coastal silt soil by application of organic fertilizer and gravel combined with Sesbania cannabina cultivation

Sun

Ren

et al. 2022

Front. Plant Sci.

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Jiangsu Province of China has a large area of coastal silt soil (CSS) with poor permeability, high salinity, and poor nutrients, which brings great difficulties to the development and utilization of coastal zones, so that needs to be improved as a matter of urgency. In this study, river-sand, serpentine, and organic fertilizer were used as additives in CSS, and Sesbania cannabina, a salt-tolerant cash crop, was planted in these differently treated soils. Through high-throughput sequencing, analysis of soil physico-chemical properties, and detection of plant growth status, the rhizosphere bacterial diversity of S. cannabina growing in CSS under different treatments and their environmental impact factors were studied, while exploring the effect and mechanism of organic fertilizer combined with gravel as a CSS modifier. The results implied that single application of organic fertilizer could significantly increase the fertility levels of total nitrogen (TN), total organic carbon (TOC) and Avail. P in CSS; then, the application of organic fertilizer with river-sand significantly reduced salt content and alkalinity of soil; meanwhile, in the treatment of single application of organic fertilizer and application of organic fertilizer combined with river-sand, the rhizosphere of S. cannabina enriched the bacterial communities of organic matter degradation and utilization to varying degrees. The soil moisture content and indicators related to saline-alkali soil (including total salt, electrical conductivity (EC), exchangeable sodium percentage (ESP), Avail. Na and Avail. K, etc.) were further reduced significantly by the application of organic fertilizer combined with river-sand and serpentine. The method has greatly improved the growth conditions of S. cannabina and promoted the positive development of its rhizosphere bacterial community. Among them, in the treatment of organic fertilizer combined with river-sand and serpentine, a variety of plant growth-promoting rhizobacteria (PGPR, such as Sphingomonas, Ensifer, and Rhodobacter) and nitrogen-cycle-related bacteria (such as nitrate-reduction-related bacteria, nitrogen-fixing bacteria like Ensifer, and purple non-sulfur photosynthetic bacteria like Rhodobacter) were enriched in the rhizosphere of S. cannabina; moreover, the mutual association and robustness of bacterial co-occurrence networks have been significantly enhanced. The results provide a theoretical basis and reference model for the improvement of coastal saline-alkali silt soil.

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Ecological assessment of groundwater ecosystems disturbed by recharge systems using organic matter quality, biofilm characteristics, and bacterial diversity

Cited by 15 publications

References 69 publications

Emerging polar pollutants in groundwater: Potential impact of urban stormwater infiltration practices

Emerging polar pollutants in groundwater: Potential impact of urban stormwater infiltration practices

Adaptation of Microbial Communities to Environmental Arsenic and Selection of Arsenite-Oxidizing Bacteria From Contaminated Groundwaters

Effect and mechanism of the improvement of coastal silt soil by application of organic fertilizer and gravel combined with Sesbania cannabina cultivation

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