Microbial biomass responses to seasonal change and imposed drying regimes at increasing depths of undisturbed topsoil profiles

Gestel, M Van; Ladd, J.N.; Amato, M.

doi:10.1016/0038-0717(92)90265-y

Cited by 154 publications

(53 citation statements)

References 22 publications

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“…Most soil microbiology studies have focused exclusively on the surface 25 cm of soil where microorganism densities are highest. However, soil profiles are often many meters deep and many microorganisms reside in subsurface layers (Blume et al, 2002;Dodds et al, 1996;Fritze et al, 2000;Van Gestel et al, 1992). Little is known about the microbial communities residing in deeper soil layers.…”

mentioning

confidence: 99%

Microbial community structure and diversity in the soil spatial profile of 5-year-old Robinia pseudoacacia ‘Idaho,’ determined by 454 sequencing of the 16S RNA gene

Chang

Niu

et al. 2013

J. Gen. Appl. Microbiol.

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confidence: 99%

Microbial community structure and diversity in the soil spatial profile of 5-year-old Robinia pseudoacacia ‘Idaho,’ determined by 454 sequencing of the 16S RNA gene

Chang

Niu

et al. 2013

J. Gen. Appl. Microbiol.

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“…Soil moisture has a direct 14 influence on the processes mediated by the soil biota (pedofauna, bacteria, fungi, etc.) because optimal 15 decomposition rates are achieved only in a narrow saturation range (Bell et al, 2008; Ju et al, 2006; 16 Porporato et al, 2003;Van Gestel et al, 1992). Owing to the strong dependence of ecological processes on 17 soil moisture, linear and non-linear interactions and feedbacks exist between hydrological processes and soil 18 ecosystem functioning (Curiel Yuste et al, 2007;Misson et al, 2005;Scott-Denton et al, 2006; Van Gestel 19 et al, 1993) A second crucial external forcing factor for SOM and soil productivity -related to vegetation rather than to 5 climate -is the amount and quality of the litter input (Dent et al, 2006; Elliott et al, 1993; Manzoni et al, 6 2008;Paul et al, 2001;Sørensen, 1974).…”

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confidence: 99%

Analysis of carbon and nitrogen dynamics in riparian soils: Model development

Brovelli¹,

Batlle-Aguilar²,

Barry³

2012

Science of The Total Environment

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1The quality of riparian soils and their ability to buffer contaminant releases to aquifers and streams are 2 connected intimately to moisture content and nutrient dynamics, in particular of carbon (C) and nitrogen (N). 3A multi-compartment model -named the Riparian Soil Model (RSM) -was developed to help investigate 4 the influence and importance of environmental parameters, climatic factors and management practices on 5 soil ecosystem functioning in riparian areas. The model improves existing tools, in particular regarding its 6 capability to simulate a wide range of temporal scales, from days to centuries, along with its ability to predict 7 the concentration and vertical distribution of dissolved organic matter (DOM). It was found that DOM 8 concentration controls the amount of soil organic matter (SOM) stored in the soil as well as the respiration 9 rate. The moisture content was computed using a detailed water budget approach, assuming that within each 10 time step all the water above field capacity drains to the layer underneath, until it becomes fully saturated. A 11 mass balance approach was also used for nutrient transport, whereas the biogeochemical reaction network 12 was developed as an extension of an existing C and N turnover model. Temperature changes across the soil 13 profile were simulated analytically, assuming periodic temperature changes in the topsoil. Sustainable management of riparian soils is of primary importance to preserve natural ecosystem 3 functioning. Riparian zones are sources of ecosystem functions and services including biodiversity hotspots, 4 water quality enhancement, and recreation sites (Brinson et al., 1981;Naiman and Decamps, 1997). 5Throughout the world, the ecological condition of natural riparian systems has declined due to a number of 6 factors, including streamflow regulation, floodplain development, channelization, and the spread of non-7 native species (Naiman and Decamps, 1997;Naiman et al., 2005). Consequently, restoration of riparian areas 8 has become a global management priority (Hughes et al., 2005;Hughes and Rood, 2003; Webb and Erskine, 9 2003). 10 Soil ecosystem functioning is connected intimately to soil organic matter (SOM) turnover, a set of complex 11 and intertwined biological processes that recycle biotic residues (such as plant litter, dead organisms, etc.) to 12 inorganic molecules. Environmental and climatic factors affect decomposition rates, the biological activity of 13 the soil and ultimately SOM cycling (Laio et al., 2001;Porporato et al., 2003). Soil moisture has a direct 14 influence on the processes mediated by the soil biota (pedofauna, bacteria, fungi, etc.) because optimal 15 decomposition rates are achieved only in a narrow saturation range (Bell et al., 2008; Ju et al., 2006; 16 Porporato et al., 2003;Van Gestel et al., 1992). Owing to the strong dependence of ecological processes on 17 soil moisture, linear and non-linear interactions and feedbacks exist between hydrological processes and soil 18 ecosystem functionin...

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“…Drying followed by rapid rewetting cycles generally causes an increase in organic substrate available for microbial attack (Soulides and Allison 1961;Sorensen 1974). These substrates are partially derived from the death of a portion of the soil organisms upon drying (Lund and Goksoyr 1980;Bottner 1985) by causing microbes to undergo osmotic shock, which can induce microbial cell lysis (Bottner 1985;Van Gestel, Ladd, and Amato 1992) or lead to the release of intracellular solutes (Halverson, Jones, and Firestone 2000). The labile substrates that become available (i.e., C and N compounds in the form of organic material) are rapidly mineralized by the remaining soil microbes, which causes a pulse in mineralization of N and C (Birch 1959;Keift, Soroker, and Firestone 1987).…”

Section: Introductionmentioning

confidence: 99%

Mineralization of Nitrogen in Soils Amended with Dairy Manure as Affected by Wetting/Drying Cycles

Watts

Torbert

2007

Communications in Soil Science and Plant Analysis

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Interest in manure management and its effects on nitrogen (N) mineralization has increased in recent years. The focus of this research was to investigate the N-mineralization rates of different soil types in Coastal Plain soils and compare them to a soil from Illinois. Soils with and without dairy composted manure addition were subjected to different wetting/drying cycles [constant moisture at 60% waterfilled pore space (WFPS) and cycling moisture from 60 to 30% WFPS] under laboratory conditions at three different temperatures (118C, 188C, and 258C). Samples were collected from three different soil types: Catlin (Mollisols), Bama (Ultisols), and Goldsboro (Utilsols). Soil chemical and physical properties were determined to help assess variations in N-mineralization rates. Addition of composted manure greatly impacted the amount of N mineralized. The amount of manure-derived organic N mineralized to inorganic forms was mainly attributed to the soil series, with the Catlin (silt loam) producing the most inorganic N followed by the Goldsboro (loam) and then Bama (sandy loam). This was probably due to soil texture and the native climatic conditions of the soil. No significant differences were observed between the constant and cycling moisture regimens, suggesting that the imposed drying cycle may not have been sufficient to desiccate microbial cells and cause a flush in N mineralization upon rewetting. Nitrogen mineralization responded greatly to the influence of temperature, with the greatest N mineralization occurring at 258C. The information acquired from this study may aid in predicting the impact of manure application to help increase N-use efficiency when applied under different conditions (e.g., climate season) and soil types.

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Microbial biomass responses to seasonal change and imposed drying regimes at increasing depths of undisturbed topsoil profiles

Cited by 154 publications

References 22 publications

Microbial community structure and diversity in the soil spatial profile of 5-year-old Robinia pseudoacacia ‘Idaho,’ determined by 454 sequencing of the 16S RNA gene

Microbial community structure and diversity in the soil spatial profile of 5-year-old Robinia pseudoacacia ‘Idaho,’ determined by 454 sequencing of the 16S RNA gene

Analysis of carbon and nitrogen dynamics in riparian soils: Model development

Mineralization of Nitrogen in Soils Amended with Dairy Manure as Affected by Wetting/Drying Cycles

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