Regulators of heterotrophic microbial potentials in wetland soils

Elisa M. D'Angelo; K. R. Reddy

doi:10.1016/S0038-0717(98)00181-3

Regulators of heterotrophic microbial potentials in wetland soils

Elisa M. D'Angelo, K. R. Reddy

Plant and Soil Sciences

Research output: Contribution to journal › Article › peer-review

132 Scopus citations

Abstract

Potential rates of aerobic respiration, denitrification, sulfate reduction and methanogenesis were investigated in 10 different wetland soils with a wide range of biogeochemical characteristics, with the objective of determining relationships between process rates and soil properties. Electron acceptor amendments to methanogenic soils caused gradual (1-13 d) to immediate transitions in electron flow from methanogenesis to alternate electron acceptors. Rates of organic C mineralization ranged between 0.2 and 34 μmol C g^-1 d^-1 and averaged three times faster with O₂ as compared to alternate electron acceptors. There was no significant difference between rates of organic C mineralization (CO₂ + CH₄ production) under denitrifying, sulfate-reducing and methanogenic conditions, indicating that soil organic carbon availability was similar under the different anaerobic conditions. Rates of electron acceptor consumption ranged between 1 and 107 μmol g^-1 d^-1 for O₂, 0.5 and 9.3 μmol g^-1 d^-1 for NO₃^-, 0.1 and 11.1 μmol g^-1 d^-1 for SO₄/^2- and 0.1 and 6.2 μmol g^-1 d^-1 for CO₂. Heterotrophic potentials in wetland soils were strongly correlated with inorganic N and several available C indices (total, dissolved and microbial C), but not with pH or dissolved nutrients (P, Ca²⁺, Mg²⁺, Fe(II)). Microbial activity-soil property relationships determined in this study may be useful for predicting the fate of pollutants that are influenced by microbial oxidation-reduction reactions in different types of wetland soils.

Original language	English
Pages (from-to)	815-830
Number of pages	16
Journal	Soil Biology and Biochemistry
Volume	31
Issue number	6
DOIs	https://doi.org/10.1016/S0038-0717(98)00181-3
State	Published - Jun 1999

Bibliographical note

Funding Information:
This research was supported by funding from the US Department of Agriculture National Research Initiative Competitive Grant Program. We gratefully acknowledge the cooperation of several researchers who provided soils used in the study: Dr. E. Roden (University of Alabama), Dr. C. Lindau (Louisiana State University), Dr. C. Crozier (North Carolina State University), Dr. J. Richardson (North Dakota State University), Dr. R. Kadlec (Wetland Management Services, MI), Dr. R. DeLaune (Louisiana St. University) and J.R. White and M.M. Fisher (University of Florida) and the statistical analysis advice of J.M. Harrison (Senior Statistician, University of Florida).

ASJC Scopus subject areas

Microbiology
Soil Science

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10.1016/S0038-0717(98)00181-3

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title = "Regulators of heterotrophic microbial potentials in wetland soils",

abstract = "Potential rates of aerobic respiration, denitrification, sulfate reduction and methanogenesis were investigated in 10 different wetland soils with a wide range of biogeochemical characteristics, with the objective of determining relationships between process rates and soil properties. Electron acceptor amendments to methanogenic soils caused gradual (1-13 d) to immediate transitions in electron flow from methanogenesis to alternate electron acceptors. Rates of organic C mineralization ranged between 0.2 and 34 μmol C g-1 d-1 and averaged three times faster with O2 as compared to alternate electron acceptors. There was no significant difference between rates of organic C mineralization (CO2 + CH4 production) under denitrifying, sulfate-reducing and methanogenic conditions, indicating that soil organic carbon availability was similar under the different anaerobic conditions. Rates of electron acceptor consumption ranged between 1 and 107 μmol g-1 d-1 for O2, 0.5 and 9.3 μmol g-1 d-1 for NO3-, 0.1 and 11.1 μmol g-1 d-1 for SO4/2- and 0.1 and 6.2 μmol g-1 d-1 for CO2. Heterotrophic potentials in wetland soils were strongly correlated with inorganic N and several available C indices (total, dissolved and microbial C), but not with pH or dissolved nutrients (P, Ca2+, Mg2+, Fe(II)). Microbial activity-soil property relationships determined in this study may be useful for predicting the fate of pollutants that are influenced by microbial oxidation-reduction reactions in different types of wetland soils.",

author = "D'Angelo, {Elisa M.} and Reddy, {K. R.}",

note = "Funding Information: This research was supported by funding from the US Department of Agriculture National Research Initiative Competitive Grant Program. We gratefully acknowledge the cooperation of several researchers who provided soils used in the study: Dr. E. Roden (University of Alabama), Dr. C. Lindau (Louisiana State University), Dr. C. Crozier (North Carolina State University), Dr. J. Richardson (North Dakota State University), Dr. R. Kadlec (Wetland Management Services, MI), Dr. R. DeLaune (Louisiana St. University) and J.R. White and M.M. Fisher (University of Florida) and the statistical analysis advice of J.M. Harrison (Senior Statistician, University of Florida).",

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AU - D'Angelo, Elisa M.

AU - Reddy, K. R.

N1 - Funding Information: This research was supported by funding from the US Department of Agriculture National Research Initiative Competitive Grant Program. We gratefully acknowledge the cooperation of several researchers who provided soils used in the study: Dr. E. Roden (University of Alabama), Dr. C. Lindau (Louisiana State University), Dr. C. Crozier (North Carolina State University), Dr. J. Richardson (North Dakota State University), Dr. R. Kadlec (Wetland Management Services, MI), Dr. R. DeLaune (Louisiana St. University) and J.R. White and M.M. Fisher (University of Florida) and the statistical analysis advice of J.M. Harrison (Senior Statistician, University of Florida).

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N2 - Potential rates of aerobic respiration, denitrification, sulfate reduction and methanogenesis were investigated in 10 different wetland soils with a wide range of biogeochemical characteristics, with the objective of determining relationships between process rates and soil properties. Electron acceptor amendments to methanogenic soils caused gradual (1-13 d) to immediate transitions in electron flow from methanogenesis to alternate electron acceptors. Rates of organic C mineralization ranged between 0.2 and 34 μmol C g-1 d-1 and averaged three times faster with O2 as compared to alternate electron acceptors. There was no significant difference between rates of organic C mineralization (CO2 + CH4 production) under denitrifying, sulfate-reducing and methanogenic conditions, indicating that soil organic carbon availability was similar under the different anaerobic conditions. Rates of electron acceptor consumption ranged between 1 and 107 μmol g-1 d-1 for O2, 0.5 and 9.3 μmol g-1 d-1 for NO3-, 0.1 and 11.1 μmol g-1 d-1 for SO4/2- and 0.1 and 6.2 μmol g-1 d-1 for CO2. Heterotrophic potentials in wetland soils were strongly correlated with inorganic N and several available C indices (total, dissolved and microbial C), but not with pH or dissolved nutrients (P, Ca2+, Mg2+, Fe(II)). Microbial activity-soil property relationships determined in this study may be useful for predicting the fate of pollutants that are influenced by microbial oxidation-reduction reactions in different types of wetland soils.

AB - Potential rates of aerobic respiration, denitrification, sulfate reduction and methanogenesis were investigated in 10 different wetland soils with a wide range of biogeochemical characteristics, with the objective of determining relationships between process rates and soil properties. Electron acceptor amendments to methanogenic soils caused gradual (1-13 d) to immediate transitions in electron flow from methanogenesis to alternate electron acceptors. Rates of organic C mineralization ranged between 0.2 and 34 μmol C g-1 d-1 and averaged three times faster with O2 as compared to alternate electron acceptors. There was no significant difference between rates of organic C mineralization (CO2 + CH4 production) under denitrifying, sulfate-reducing and methanogenic conditions, indicating that soil organic carbon availability was similar under the different anaerobic conditions. Rates of electron acceptor consumption ranged between 1 and 107 μmol g-1 d-1 for O2, 0.5 and 9.3 μmol g-1 d-1 for NO3-, 0.1 and 11.1 μmol g-1 d-1 for SO4/2- and 0.1 and 6.2 μmol g-1 d-1 for CO2. Heterotrophic potentials in wetland soils were strongly correlated with inorganic N and several available C indices (total, dissolved and microbial C), but not with pH or dissolved nutrients (P, Ca2+, Mg2+, Fe(II)). Microbial activity-soil property relationships determined in this study may be useful for predicting the fate of pollutants that are influenced by microbial oxidation-reduction reactions in different types of wetland soils.

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DO - 10.1016/S0038-0717(98)00181-3

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SN - 0038-0717

VL - 31

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JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

IS - 6

ER -

Regulators of heterotrophic microbial potentials in wetland soils

Abstract

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