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Microbial functional diversity and carbon use feedback in soils as affected by heavy metals

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Microbial functional diversity and carbon use feedback in soils as affected by heavy metals. / Xu, Yilu; Seshadri, Balaji; Bolan, Nanthi; Sarkar, Binoy; Ok, Yong Sik; Zhang, Wei; Rumpel, Cornelia; Sparks, Donald; Farrell, Mark; Hall, Tony; Dong, Zhaomin.

In: Environment International, Vol. 125, 01.04.2019, p. 478-488.

Research output: Contribution to journalJournal article

Harvard

Xu, Y, Seshadri, B, Bolan, N, Sarkar, B, Ok, YS, Zhang, W, Rumpel, C, Sparks, D, Farrell, M, Hall, T & Dong, Z 2019, 'Microbial functional diversity and carbon use feedback in soils as affected by heavy metals', Environment International, vol. 125, pp. 478-488. https://doi.org/10.1016/j.envint.2019.01.071

APA

Xu, Y., Seshadri, B., Bolan, N., Sarkar, B., Ok, Y. S., Zhang, W., Rumpel, C., Sparks, D., Farrell, M., Hall, T., & Dong, Z. (2019). Microbial functional diversity and carbon use feedback in soils as affected by heavy metals. Environment International, 125, 478-488. https://doi.org/10.1016/j.envint.2019.01.071

Vancouver

Xu Y, Seshadri B, Bolan N, Sarkar B, Ok YS, Zhang W et al. Microbial functional diversity and carbon use feedback in soils as affected by heavy metals. Environment International. 2019 Apr 1;125:478-488. https://doi.org/10.1016/j.envint.2019.01.071

Author

Xu, Yilu ; Seshadri, Balaji ; Bolan, Nanthi ; Sarkar, Binoy ; Ok, Yong Sik ; Zhang, Wei ; Rumpel, Cornelia ; Sparks, Donald ; Farrell, Mark ; Hall, Tony ; Dong, Zhaomin. / Microbial functional diversity and carbon use feedback in soils as affected by heavy metals. In: Environment International. 2019 ; Vol. 125. pp. 478-488.

Bibtex

@article{cb645423f7e64f56af233ef7fce7e81b,
title = "Microbial functional diversity and carbon use feedback in soils as affected by heavy metals",
abstract = "Soil microorganisms are an important indicator of soil fertility and health. However, our state of knowledge about soil microbial activities, community compositions and carbon use patterns under metal contaminations is still poor. This study aimed to evaluate the influences of heavy metals (Cd and Pb) on soil microorganisms by investigating the microbial community composition and carbon use preferences. Metal pollution was approached both singly and jointly with low (25 and 2500 mg kg−1) and high (50 and 5000 mg kg−1) concentrations of Cd and Pb, respectively, in an artificially contaminated soil. In a laboratory incubation experiment, bio-available and potentially bio-available metal concentrations, selected soil properties (pH, electrical conductivity, total organic carbon and total nitrogen), and microbial parameters (microbial activity as basal respiration, microbial biomass carbon (MBC) and microbial functional groups) were determined at two sampling occasions (7 and 49 days). Metal contamination had no effect on the selected soil properties, while it significantly inhibited both microbial activity and MBC formation. Contaminated soils had higher microbial quotient (qCO2), suggesting there was higher energy demand with less microbially immobilized carbon as MBC. Notably, the efficiency of microbial carbon use was repressed as the metal concentration increased, yet no difference was observed between metal types (p > 0.05). Based on the microbial phospholipid fatty acids (PLFA) analysis, total PLFAs decreased significantly under metal stress at the end of incubation. Heavy metals had a greater negative influence on the fungal population than bacteria with respective 5–35 and 8–32% fall in abundances. The contaminant-driven (metal concentrations and types) variation of soil PLFA biomarkers demonstrated that the heavy metals led to the alteration of soil microbial community compositions and their activities, which consequently had an adverse impact on soil microbial carbon immobilization.",
keywords = "Heavy metals, Microbial activity, Microbial carbon decomposition, Microbial community composition, PLFAs, Soil organic carbon",
author = "Yilu Xu and Balaji Seshadri and Nanthi Bolan and Binoy Sarkar and Ok, {Yong Sik} and Wei Zhang and Cornelia Rumpel and Donald Sparks and Mark Farrell and Tony Hall and Zhaomin Dong",
year = "2019",
month = apr,
day = "1",
doi = "10.1016/j.envint.2019.01.071",
language = "English",
volume = "125",
pages = "478--488",
journal = "Environment International",
issn = "0160-4120",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - Microbial functional diversity and carbon use feedback in soils as affected by heavy metals

AU - Xu, Yilu

AU - Seshadri, Balaji

AU - Bolan, Nanthi

AU - Sarkar, Binoy

AU - Ok, Yong Sik

AU - Zhang, Wei

AU - Rumpel, Cornelia

AU - Sparks, Donald

AU - Farrell, Mark

AU - Hall, Tony

AU - Dong, Zhaomin

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Soil microorganisms are an important indicator of soil fertility and health. However, our state of knowledge about soil microbial activities, community compositions and carbon use patterns under metal contaminations is still poor. This study aimed to evaluate the influences of heavy metals (Cd and Pb) on soil microorganisms by investigating the microbial community composition and carbon use preferences. Metal pollution was approached both singly and jointly with low (25 and 2500 mg kg−1) and high (50 and 5000 mg kg−1) concentrations of Cd and Pb, respectively, in an artificially contaminated soil. In a laboratory incubation experiment, bio-available and potentially bio-available metal concentrations, selected soil properties (pH, electrical conductivity, total organic carbon and total nitrogen), and microbial parameters (microbial activity as basal respiration, microbial biomass carbon (MBC) and microbial functional groups) were determined at two sampling occasions (7 and 49 days). Metal contamination had no effect on the selected soil properties, while it significantly inhibited both microbial activity and MBC formation. Contaminated soils had higher microbial quotient (qCO2), suggesting there was higher energy demand with less microbially immobilized carbon as MBC. Notably, the efficiency of microbial carbon use was repressed as the metal concentration increased, yet no difference was observed between metal types (p > 0.05). Based on the microbial phospholipid fatty acids (PLFA) analysis, total PLFAs decreased significantly under metal stress at the end of incubation. Heavy metals had a greater negative influence on the fungal population than bacteria with respective 5–35 and 8–32% fall in abundances. The contaminant-driven (metal concentrations and types) variation of soil PLFA biomarkers demonstrated that the heavy metals led to the alteration of soil microbial community compositions and their activities, which consequently had an adverse impact on soil microbial carbon immobilization.

AB - Soil microorganisms are an important indicator of soil fertility and health. However, our state of knowledge about soil microbial activities, community compositions and carbon use patterns under metal contaminations is still poor. This study aimed to evaluate the influences of heavy metals (Cd and Pb) on soil microorganisms by investigating the microbial community composition and carbon use preferences. Metal pollution was approached both singly and jointly with low (25 and 2500 mg kg−1) and high (50 and 5000 mg kg−1) concentrations of Cd and Pb, respectively, in an artificially contaminated soil. In a laboratory incubation experiment, bio-available and potentially bio-available metal concentrations, selected soil properties (pH, electrical conductivity, total organic carbon and total nitrogen), and microbial parameters (microbial activity as basal respiration, microbial biomass carbon (MBC) and microbial functional groups) were determined at two sampling occasions (7 and 49 days). Metal contamination had no effect on the selected soil properties, while it significantly inhibited both microbial activity and MBC formation. Contaminated soils had higher microbial quotient (qCO2), suggesting there was higher energy demand with less microbially immobilized carbon as MBC. Notably, the efficiency of microbial carbon use was repressed as the metal concentration increased, yet no difference was observed between metal types (p > 0.05). Based on the microbial phospholipid fatty acids (PLFA) analysis, total PLFAs decreased significantly under metal stress at the end of incubation. Heavy metals had a greater negative influence on the fungal population than bacteria with respective 5–35 and 8–32% fall in abundances. The contaminant-driven (metal concentrations and types) variation of soil PLFA biomarkers demonstrated that the heavy metals led to the alteration of soil microbial community compositions and their activities, which consequently had an adverse impact on soil microbial carbon immobilization.

KW - Heavy metals

KW - Microbial activity

KW - Microbial carbon decomposition

KW - Microbial community composition

KW - PLFAs

KW - Soil organic carbon

U2 - 10.1016/j.envint.2019.01.071

DO - 10.1016/j.envint.2019.01.071

M3 - Journal article

C2 - 30771648

AN - SCOPUS:85061397953

VL - 125

SP - 478

EP - 488

JO - Environment International

JF - Environment International

SN - 0160-4120

ER -