Decadal evolution of an acidic pit lake: Insights into the biogeochemical impacts of microbial community succession

She, Zhixiang; Wang, Jin; Pan, Xin; Ma, Ding; Gao, Yijun; Wang, Shaoping; Chuai, Xin; Yue, Zhengbo

doi:10.1016/j.watres.2023.120415

Cited by 4 publications

(3 citation statements)

References 68 publications

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“…Prior studies have revealed its distinct stratification, weak mixing, and intense photochemical processes. 36−38 Consistent with previous studies, 36 the lake was sampled quarterly during March, June, September, and December 2020. Water samples were collected from the surface (∼0.5 m) and bottom (∼10 m) layers at three sampling sites (∼100 m apart).…”

Section: Data Collection For Model Validationmentioning

confidence: 84%

“…Subsequently, we contrasted neutral modeling results for DOM assemblages and microbial communities in the lake and river data sets, respectively. The 16S rRNA amplicon analyses of prokaryotic microorganisms were conducted as previously described . Neutral community model was then applied to examine the influence of stochastic processes on the microbial community assembly. , By comparing the variations in the fit between the microbial and DOM neutral models, we obtained preliminary insights into the relationship between the microbial community and DOM molecular assembly.…”

Section: Methodsmentioning

confidence: 99%

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Quantifying Stochastic Processes in Shaping Dissolved Organic Matter Pool with High-Resolution Mass Spectrometry

She,

Wang,

Wang

et al. 2023

Environ. Sci. Technol.

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Natural dissolved organic matter (DOM) represents a ubiquitous molecular mixture, progressively characterized by spatiotemporal resolution. However, an inadequate comprehension of DOM molecular dynamics, especially the stochastic processes involved, hinders carbon cycling predictions. This study employs ecological principles to introduce a neutral theory to elucidate the fundamental processes involving molecular generation, degradation, and migration. A neutral model is thus formulated to assess the probability distribution of DOM molecules, whose frequencies and abundances follow a β-distribution relationship. The neutral model is subsequently validated with high-resolution mass spectrometry (HRMS) data from various waterbodies, including lakes, rivers, and seas. The model fitting highlights the prevalence of molecular neutral distribution and quantifies the stochasticity within DOM molecular dynamics. Furthermore, the model identifies deviations of HRMS observations from neutral expectations in photochemical and microbial experiments, revealing nonrandom molecular transformations. The ecological null model further validates the neutral modeling results, demonstrating that photodegradation reduces molecular stochastic dynamics at the surface of an acidic pit lake, while random distribution intensifies at the river surface compared with the porewater. Taken together, the DOM molecular neutral model emphasizes the significance of stochastic processes in shaping a natural DOM pool, offering a potential theoretical framework for DOM molecular dynamics in aquatic and other ecosystems.

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Section: Data Collection For Model Validationmentioning

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Quantifying Stochastic Processes in Shaping Dissolved Organic Matter Pool with High-Resolution Mass Spectrometry

She,

Wang,

Wang

et al. 2023

Environ. Sci. Technol.

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“…In turn, it correlates with the dissolved oxygen availability (reported in Beamud et al, 2007 ) and follows the trend of chlorophyl a , which declines bellow 20 m of depth. Concurrence of Acidiphilium and Ferrovum has been reported in acidic pit lakes at the Nanshan iron mine in China ( Hao et al, 2017 ; She et al, 2023 ) and streams draining the abandoned Mynydd Parys copper mine in north Wales ( Johnson et al, 2014 ), under conditions in which one drives the oxidation of ferrous iron and the other drives the reduction of ferric iron. Ferrovum myxofaciens is described as an extremely acidophilic, psychrotolerant, autotrophic, and obligate ferrous iron oxidizer, which requires oxygen as electron acceptor for growth ( Johnson et al, 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Nutrient structure dynamics and microbial communities at the water–sediment interface in an extremely acidic lake in northern Patagonia

Cuevas,

Francisco,

Díaz-González

et al. 2024

Front. Microbiol.

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Lake Caviahue (37° 50 ‘S and 71° 06’ W; Patagonia, Argentina) is an extreme case of a glacial, naturally acidic, aquatic environment (pH ~ 3). Knowledge of the bacterial communities in the water column of this lake, is incipient, with a basal quantification of the bacterioplankton abundance distribution in the North and South Basins of Lake Caviahue, and the described the presence of sulfur and iron oxidizing bacteria in the lake sediments. The role that bacterioplankton plays in nutrient utilization and recycling in this environment, especially in the phosphorus cycle, has not been studied. In this work, we explore this aspect in further depth by assessing the diversity of pelagic, littoral and sediment bacteria, using state of the art molecular methods and identifying the differences and commonalties in the composition of the cognate communities. Also, we investigate the interactions between the sediments of Lake Caviahue and the microbial communities present in both sediments, pore water and the water column, to comprehend the ecological relationships driving nutrient structure and fluxes, with a special focus on carbon, nitrogen, and phosphorus. Two major environmental patterns were observed: (a) one distinguishing the surface water samples due to temperature, Fe2+, and electrical conductivity, and (b) another distinguishing winter and summer samples due to the high pH and increasing concentrations of N-NH4+, DOC and SO42−, from autumn and spring samples with high soluble reactive phosphorus (SRP) and iron concentrations. The largest bacterial abundance was found in autumn, alongside higher levels of dissolved phosphorus, iron forms, and increased conductivity. The highest values of bacterial biomass were found in the bottom strata of the lake, which is also where the greatest diversity in microbial communities was found. The experiments using continuous flow column microcosms showed that microbial growth over time, in both the test and control columns, was accompanied by a decrease in the concentration of dissolved nutrients (SRP and N-NH4+), providing proof that sediment microorganisms are active and contribute significantly to nutrient utilization/mobilization.

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Detoxification and removal of heavy metal by an acid-tolerant microalgae, Graesiella sp. MA1

Zhang,

Wang,

Shao

et al. 2024

Journal of Water Process Engineering

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Decadal evolution of an acidic pit lake: Insights into the biogeochemical impacts of microbial community succession

Cited by 4 publications

References 68 publications

Quantifying Stochastic Processes in Shaping Dissolved Organic Matter Pool with High-Resolution Mass Spectrometry

Quantifying Stochastic Processes in Shaping Dissolved Organic Matter Pool with High-Resolution Mass Spectrometry

Nutrient structure dynamics and microbial communities at the water–sediment interface in an extremely acidic lake in northern Patagonia

Detoxification and removal of heavy metal by an acid-tolerant microalgae, Graesiella sp. MA1

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