Groundwater metabolome responds to recharge in fractured sedimentary strata

Zerfaß, Christian; Lehmann, Robert; Ueberschaar, Nico; Sanchez-Arcos, Carlos; Totsche, Kai Uwe; Pohnert, Georg

doi:10.1016/j.watres.2022.118998

Cited by 4 publications

(14 citation statements)

References 59 publications

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“…Therefore, during the fluctuation of the GTF zone, nutrients necessary for organisms are redistributed . The dynamics and metabolic activities of microbial populations can transform dissolved organic matter while constituting the diversities of groundwater metabolomes . The H 2 O 2 formed during the GTF process affects bacterial activity.…”

Section: Impacts Of Gtf On Chemical and Biological Fieldsmentioning

confidence: 99%

“…49 The dissimilarity variability between groundwaters with contrasting aquifer properties coincides with recharge dynamics, including high and low groundwater tables as well as recharge and recession phases. 50 Hydraulic gradients can drive the exchange of water fluxes between surface water and the GTF zone (Figure 1). 51 Groundwater extraction or continuous recharge of surface water causes a strong downward hydraulic gradient.…”

Section: Lateral Recharge and Drainagementioning

confidence: 99%

“…111 The dynamics and metabolic activities of microbial populations can transform dissolved organic matter while constituting the diversities of groundwater metabolomes. 50 The H 2 O 2 formed during the GTF process affects bacterial activity. Through the exploration of iron sediment within the microbial community structure, researchers proved that H 2 O 2 had an inhibitory effect on the microbial population of the Fe(II) sediment surface, and the inhibition effect was proportional to the H 2 O 2 content.…”

Section: Microorganismsmentioning

confidence: 99%

“…Causes of GTF. Dynamic fluctuation of the groundwater table caused by various natural and anthropogenic activities (such as evaporation, rainfall, tide, lateral recharge and drainage, surface water, − irrigation, , and groundwater pumping). There is a mixing zone between freshwater and seawater in a coastal aquifer, and salinity drives high-salinity seawater into freshwater aquifers.…”

Section: Formation Of Gtfmentioning

confidence: 99%

“…The water flux intensity and direction of these mutual conversions can vary in a complex manner over space and time . The dissimilarity variability between groundwaters with contrasting aquifer properties coincides with recharge dynamics, including high and low groundwater tables as well as recharge and recession phases . Hydraulic gradients can drive the exchange of water fluxes between surface water and the GTF zone (Figure ).…”

Section: Formation Of Gtfmentioning

confidence: 99%

See 4 more Smart Citations

A Critical Review of Groundwater Table Fluctuation: Formation, Effects on Multifields, and Contaminant Behaviors in a Soil and Aquifer System

Wei,

Chen,

Cao

et al. 2024

Environ. Sci. Technol.

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The groundwater table fluctuation (GTF) zone is an important medium for the hydrologic cycle between unsaturated soil and saturated aquifers, which accelerates the migration, transformation, and redistribution of contaminants and further poses a potential environmental risk to humans. In this review, we clarify the key processes in the generation of the GTF zone and examine its links with the variation of the hydrodynamic and hydrochemistry field, colloid mobilization, and contaminant migration and transformation. Driven by groundwater recharge and discharge, GTF regulates water flow and the movement of the capillary fringe, which further control the advection and dispersion of contaminants in soil and groundwater. In addition, the formation and variation of the reactive oxygen species (ROS) waterfall are impacted by GTF. The changing ROS components partially determine the characteristic transformation of solutes and the dynamic redistribution of the microbial population. GTF facilitates the migration and transformation of contaminants (such as nitrogen, heavy metals, non-aqueous phase liquids, and volatile organic compounds) through colloid mobilization, the co-migration effect, and variation of the hydrodynamic and hydrochemistry fields. In conclusion, this review illustrates the limitations of the current literature on GTF, and the significance of GTF zones in the underground environment is underscored by expounding on the future directions and prospects.

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Section: Impacts Of Gtf On Chemical and Biological Fieldsmentioning

confidence: 99%

Section: Lateral Recharge and Drainagementioning

confidence: 99%

Section: Microorganismsmentioning

confidence: 99%

Section: Formation Of Gtfmentioning

confidence: 99%

Section: Formation Of Gtfmentioning

confidence: 99%

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A Critical Review of Groundwater Table Fluctuation: Formation, Effects on Multifields, and Contaminant Behaviors in a Soil and Aquifer System

Wei,

Chen,

Cao

et al. 2024

Environ. Sci. Technol.

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Current-use and legacy contaminants evidence dissolved organic matter transfer and dynamics across a fractured-rock groundwater recharge area

Zerfaß,

Lehmann,

Ueberschaar

et al. 2024

Preprint

Self Cite

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Anthropogenic activities cause the release of vast amounts of contaminants into the environment which eventually reach even groundwater resources. With usually sparse regulatory monitoring of limited priority compounds, the large spectrum of contaminants, and the intricacies of intra- and inter-annual contaminant dynamics, such as the emergence and mobilisation of contaminants, are easily overlooked. Utilizing an 6-year record of untargeted LC-MS assessment of dissolved organic, we report the detection and tracing of selected environmental chemicals in the Hainich Critical Zone Exploratory (central Germany), representing a model groundwater flow system under different land use. The insect repellent DEET (N,N-diethyl-m-toluamide) and the coniferous resin acid 7-ODAA (7-oxodehydroabietic acids) show phases of seasonal dynamics in line with their expected periods of release. The legacy herbicides simazine, the triazine transformation product hydroxypropazine, and the flame retardant/plasticiser TPP (triphenyl phosphate) occurred episodically at various locations in the fractured sedimentary bedrock. Within the period of monitoring, extreme weather events (i.e., the severe 2018 drought) and extreme subsurface responses (i.e., 5-year groundwater highstand 2018) likely contributed to long-term organic matter dynamics, potentially causing re-emergence of legacy agrochemicals. This investigation points to the persistence and mobilisation of anthropogenic contaminants, and highlights the importance of long-term combined untargeted and targeted analysis of the groundwater dissolved organic matter for understanding subsurface ecosystems processes. The results add a note of caution for regulatory monitoring since also legacy contaminant levels may considerably vary over time.Highlights6 years of monitoring with non-target LC-MS screenings; 4-weekly samplings5 current-use and legacy compounds that evidence dissolved organic matter transferCompounds comprise regularly targeted and non-monitored features in groundwaterPronounced phases of non-detects help to further investigate surface-subsurface couplingThis illustrates the need for spatiotemporally highly resolved non-target monitoring

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Altering environmental conditions induce shifts in simulated deep terrestrial subsurface bacterial communities—Secretion of primary and secondary metabolites

Herzig,

Hyötyläinen,

Vettese

et al. 2023

Environmental Microbiology

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The deep terrestrial subsurface (DTS) harbours a striking diversity of microorganisms. However, systematic research on microbial metabolism, and how varying groundwater composition affects the bacterial communities and metabolites in these environments is lacking. In this study, DTS groundwater bacterial consortia from two Fennoscandian Shield sites were enriched and studied. We found that the enriched communities from the two sites consisted of distinct bacterial taxa, and alterations in the growth medium composition induced changes in cell counts. The lack of an exogenous organic carbon source (ECS) caused a notable increase in lipid metabolism in one community, while in the other, carbon starvation resulted in low overall metabolism, suggesting a dormant state. ECS supplementation increased CO2 production and SO42− utilisation, suggesting activation of a dissimilatory sulphate reduction pathway and sulphate‐reducer‐dominated total metabolism. However, both communities shared common universal metabolic features, most probably involving pathways needed for the maintenance of cell homeostasis (e.g., mevalonic acid pathway). Collectively, our findings indicate that the most important metabolites related to microbial reactions under varying growth conditions in enriched DTS communities include, but are not limited to, those linked to cell homeostasis, osmoregulation, lipid biosynthesis and degradation, dissimilatory sulphate reduction and isoprenoid production.

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Groundwater metabolome responds to recharge in fractured sedimentary strata

Cited by 4 publications

References 59 publications

A Critical Review of Groundwater Table Fluctuation: Formation, Effects on Multifields, and Contaminant Behaviors in a Soil and Aquifer System

A Critical Review of Groundwater Table Fluctuation: Formation, Effects on Multifields, and Contaminant Behaviors in a Soil and Aquifer System

Current-use and legacy contaminants evidence dissolved organic matter transfer and dynamics across a fractured-rock groundwater recharge area

Altering environmental conditions induce shifts in simulated deep terrestrial subsurface bacterial communities—Secretion of primary and secondary metabolites

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