Contamination of Soil by Copper Affects the Dynamics, Diversity, and Activity of Soil Bacterial Communities Involved in Wheat Decomposition and Carbon Storage

Bernard, Lætitia; Maron, Pierre‐Alain; Mougel, Christophe; Nowak, Virginie; Lévêque, Jean; Marol, C.; Balesdent, Jérôme; Gibiat, F.; Ranjard, Lionel

doi:10.1128/aem.00616-09

Cited by 38 publications

(17 citation statements)

References 13 publications

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“…Priming effect is an increase in soil organic matter mineralization by microorganisms following fresh organic matter (FOM) input (Bingeman et al, 1953;Kuzyakov et al, 2000). After more than two decades of increasing research effort, PE-generating mechanisms, determinants and actors still need to be elucidated (Fontaine et al, 2003;Bernard et al, 2007Bernard et al, , 2009Bernard et al, , 2012Pascault et al, 2013;Chen et al, 2014). Based on a literature review, Fontaine et al (2003) proposed that PE can be generated by two different mechanisms: (1) indirectly via collateral damage exerted on soil organic matter (SOM) by extracellular enzymes released by FOM feeders, and (2) directly via the co-metabolism of energy-rich FOM catabolites by SOM feeders who mine SOM for nutrients.…”

Section: Introductionmentioning

confidence: 99%

Soil microbial diversity drives the priming effect along climate gradients: a case study in Madagascar

Razanamalala¹,

Razafimbelo²,

Maron³

et al. 2017

The ISME Journal

128

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The priming effect in soil is proposed to be generated by two distinct mechanisms: 'stoichiometric decomposition' and/or 'nutrient mining' theories. Each mechanism has its own dynamics, involves its own microbial actors, and targets different soil organic matter (SOM) pools. The present study aims to evaluate how climatic parameters drive the intensity of each priming effect generation mechanism via the modification of soil microbial and physicochemical properties. Soils were sampled in the center of Madagascar, along climatic gradients designed to distinguish temperature from rainfall effects. Abiotic and biotic soil descriptors were characterized including bacterial and fungal phylogenetic composition. Potential organic matter mineralization and PE were assessed 7 and 42 days after the beginning of incubation with C-enriched wheat straw. Both priming mechanisms were mainly driven by the mean annual temperature but in opposite directions. The priming effect generated by stoichiometric decomposition was fostered under colder climates, because of soil enrichment in less developed organic matter, as well as in fast-growing populations. Conversely, the priming effect generated by nutrient mining was enhanced under warmer climates, probably because of the lack of competition between slow-growing populations mining SOM and fast-growing populations for the energy-rich residue entering the soil. Our study leads to hypotheses about the consequences of climate change on both PE generation mechanisms and associated consequences on soil carbon sequestration.

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Section: Introductionmentioning

confidence: 99%

Soil microbial diversity drives the priming effect along climate gradients: a case study in Madagascar

Razanamalala¹,

Razafimbelo²,

Maron³

et al. 2017

The ISME Journal

128

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“…Likewise, using the energy-rich FOM, SOM feeders would increase the decomposition rate of the nutrient-rich SOM in a co-metabolism process, which would allow them to assimilate N and P. These authors concluded that any disturbances affecting the relative proportions of the two functional groups (FOM and SOM feeders) would impact the intensity of the PE. However, the identity of microorganisms that form part of the SOM-feeder group remains more or less unknown (Bernard et al, 2009;Kuzyakov, 2010).…”

Section: Introductionmentioning

confidence: 99%

Endogeic earthworms shape bacterial functional communities and affect organic matter mineralization in a tropical soil

et al. 2011

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Priming effect (PE) is defined as a stimulation of the mineralization of soil organic matter (SOM) following a supply of fresh organic matter. This process can have important consequences on the fate of SOM and on the management of residues in agricultural soils, especially in tropical regions where soil fertility is essentially based on the management of organic matter. Earthworms are ecosystem engineers known to affect the dynamics of SOM. Endogeic earthworms ingest large amounts of soil and assimilate a part of organic matter it contains. During gut transit, microorganisms are transported to new substrates and their activity is stimulated by (i) the production of readily assimilable organic matter (mucus) and (ii) the possible presence of fresh organic residues in the ingested soil. The objective of our study was to see (i) whether earthworms impact the PE intensity when a fresh residue is added to a tropical soil and (ii) whether this impact is linked to a stimulation/inhibition of bacterial taxa, and which taxa are affected. A tropical soil from Madagascar was incubated in the laboratory, with a 13 C wheat straw residue, in the presence or absence of a peregrine endogeic tropical earthworm, Pontoscolex corethrurus. Emissions of 12 CO 2 and 13 CO 2 were followed during 16 days. The coupling between DNA-SIP (stable isotope probing) and pyrosequencing showed that stimulation of both the mineralization of wheat residues and the PE can be linked to the stimulation of several groups especially belonging to the Bacteroidetes phylum. The ISME Journal (2012) 6, 213-222; doi:10.1038/ismej.2011; published online 14 July 2011 Subject Category: microbial ecology and functional diversity of natural habitats

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“…This corroborates the findings of Benedict, Oladapo, and Emmanuel (1991), Adeniyi and Yusuf (2007) and Adefemi et al (2008), who reported that the level of heavy metal determined in the samples of Epe and Badagry Lagoon were lower than those reported in the sediment. The higher concentration of copper (4,7±0,03) in the water samples from Epe Lagoon than the standard specification (<1mg/L) by FEPA (2003) and WHO (1997) may be as a result of heavy microbial contamination of the water body (Numako & Nakai, 1995;Bernard et al, 2009). The findings showed higher value of dissolved oxygen in the water sample (9,0±0,02) than the standard specification (3,0-5,0mg/L; FEPA 2003).…”

Section: Discussionmentioning

confidence: 94%

Heavy metal bio-accumulation in the kidneys of scaly and non-scaly fishes from Epe Lagoon, Nigeria

Owolabi

Awodele

2019

URJ

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Introduction: Heavy metal contamination of aquatic ecosystems has been a serious concern throughout the world for many decades, and has caused devastating effects on aquatic organisms. Objective: To evaluate the levels of Cu, Zn, Fe, Pb and Cd in the kidneys of scaly (T. zillii, M. rume and R. ocellatus) and non-scaly (C. gariepinus, Ch. nigrodigitatus and S. filamentosus) fishes in Epe lagoon, Nigeria to understanding the bioaccumulation potential of the kidney relative to other organs in fish that have previously been reported in literature. Methods: We studied concentrations of copper (Cu), iron (Fe), zinc (Zn), cadmium (Cd) and lead (Pb) in the kidneys of 141 scaly fishes (Mo. rume, R. occellatus, T. zillii) and 134 non-scaly fishes (C. gariepinus, S.filamentosus, Ch. nigrodigitatus) and water samples obtained from Epe Lagoon using Standard Atomic Absorption Spectrometry methods. Results: The kidneys of R. ocellatus had the highest levels of Fe (2,92±0,10) and Cd (0,18±0,03), while that of Ch. nigrodigitatus (2,78±0,02) and T. zillii (0,31±0,02) had the lowest concentration of Fe and Cd respectively. T. zillii and M. rume accumulated Cu and Zn in their kidneys respectively more than the others. There was no significant difference (p<0,05) in mean trace metal concentrations among the scaly and non-scaly fishes. The concentrations of metals in fish specimens were below the FEPA and WHO prescribed maximum allowable limits in food fish. Dissolved oxygen (9,0±0,02) and total alkalinity (24,0±0,01) were above FEPA values (dissolved oxygen: 3,0-5,0mg/L and total alkalinity: 3,05-5,3mg/L). The ranking of heavy metals distribution in the water body was Cu (4,70)>Fe (0,72)>Zn (0,13)>Pb (0,007)>Cd (0,006). Bioconcentration factor of Zn was generally high in all species. Conclusion: Close monitoring of these metals in the fishes and the lagoon is important to ensure the safety of fish consumers in the area.

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Contamination of Soil by Copper Affects the Dynamics, Diversity, and Activity of Soil Bacterial Communities Involved in Wheat Decomposition and Carbon Storage

Cited by 38 publications

References 13 publications

Soil microbial diversity drives the priming effect along climate gradients: a case study in Madagascar

Soil microbial diversity drives the priming effect along climate gradients: a case study in Madagascar

Endogeic earthworms shape bacterial functional communities and affect organic matter mineralization in a tropical soil

Heavy metal bio-accumulation in the kidneys of scaly and non-scaly fishes from Epe Lagoon, Nigeria

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