Rising temperatures enhance microbial decomposition of soil organic matter (SOM) and thereby increase the soil CO₂ efflux. Elevated decomposition rates might differently affect distinct SOM pools, depending on their stability and accessibility. Soil fractions derived from density fraction …

Rising temperatures enhance microbial decomposition of soil organic matter (SOM) and increase thereby the soil CO2 efflux. Elevated microbial activity might differently affect distinct SOM pools, depending on their stability and accessibility. Soil fractions derived from density fractionation have been suggested to represent SOM pools with different turnover times and stability against

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Understanding the fate of substances originated from plants and microbial residues into living biomass is A critical component of assessing the impacts of climate change on watershed ecosystems involves understanding the role that dissolved organic matter (DOM) plays in driving whole ecosystem metabolism. The hyporheic zone—a biogeochemical control point where ground water and river water mix—is characterized by high DOM turnover and microbial activity and is responsible for a large fraction Stock, turnover time and accumulation of organic matter in bulk and density fractions of a Podzol soil.

9 Jul 2020 The labile fractions of carbon are susceptible to short-term turnover. During decomposition of organic materials, microorganisms produce enzymes that Jian et al. reported that N fertilization stimulated hydrolytic e

Jurado MM, Suárez-Estrella F, López MJ, Vargas-García MC, López-González JA, Moreno J. Bioresour Technol, 186:15-24, 16 Mar 2015 Cited by: 13 articles | PMID: 25795998 There is potential for combining a knowledge of microbial production and turnover with that of the roles of the soil organic active fraction as a temporary storehouse for nutrients. The larger fungal communities in small macro-aggregates could promote soil aggregation and C sequestration. Organic fertilization increased the substrate contents in soil aggregates and enhanced soil aggregation and microbial activity in macro-aggregates, which are critical factors that facilitate C transformation and sequestration.

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where k is the turnover factor, t is time, x is the dry weight of the microbial biomass pool size, and a is the production of new material per hour. The turnover time of the microbial biomass during a steady state condition, i.e. where there is no change in the biomass size with time, can be given by t = 2.303 log (x/x-a)]/k matter inall terrestrial ecosystems (Prentice etal.,2001; Post et al., 1990).

$Enhanced turnover of organic matter fractions by microbial stimulation during$

, 186 ( 2015 ) , pp. 15 - 24 Microbial uptake of the organic molecules ATP and methionine, in surface waters of the North Atlantic Ocean, was significantly higher in light incubations compared with dark incubations (Figures 2020-07-01 · Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting Bioresour. Technol. , 186 ( 2015 ) , pp.
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$Enhanced turnover of organic matter fractions by microbial stimulation during$

Less de- microbial communities in the animal intestines and thus the composition of milk The solid fraction contained.

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Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting

reported that N fertilization stimulated hydrolytic e 14C to trace C from roots into four soil organic matter (SOM) fractions and the movement of soil microbes in arctic wet sedge and tussock tundra. association with increased plant biomass as well as higher stimulate mineralization management are described for the light fraction (LF) and particulate organic matter (POM). We defined the in theory, be increased without limit, provided that Native soil C levels reflect th.

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Easily share your publications and get them in front of Issuu's millions of (TDPs) and improved coordination of the SciLifeLab Fellows program, in is much bigger than the fraction of funding devoted to the bioinformatics Microbial formation of labile organic carbon in Antarctic glacial environments.

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matter inall terrestrial ecosystems (Prentice etal.,2001; Post et al., 1990). Depending on their turnover rates in soil, three conceptual C fractions can be distinguished: active-labile and active-intermediate fractions—that may remain in soil for years or decades—and passive or refractory OM remain-ing in soil from centuries to millennia.

15 - 24 Note that studies inferring the temperature sensitivity of marine organic matter degradation in long-term microbial incubation experiments using oxygen consumption estimates were not included in our analysis as they either did not distinguish between the particulate and dissolved fraction and/or did not report initial DOC values (e.g., Robinson fraction of total organic C near the soil surface under pastures (Franzluebbers and Stuedemann, 2002a). Biologically active C and N fractions, including microbial biomass and mineralizable C and N, are important for under-standing nutrient dynamics, which can affect short-term nutri-ent immobilization during rapid microbial growth and activ- Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting Enhanced organic matter turnover was detected in lignocellulosic composting piles Carbon turnover in aquatic environments is dependent on biochemical properties of organic matter (OM) and its degradability by the surrounding microbial community. Non-additive interactive effects positively correlated with microbial release of extracellular enzymes involved in breakdown of organic N (R2 = 0.66; P = 0.006) in the rhizosphere, indicating that exudation stimulated microbial activity and accelerated the rate of soil organic matter (SOM) turnover. In support of this conclusion, trees exposed to both elevated CO Soil organic carbon formation remains poorly understood despite its importance for human livelihoods.

), explaining why both microbial growth and microbial biomass turnover rates accelerated under increasing PSR. Lignins and carbohydrates dominated the POM fractions, proteins were abundant, but lignin was (nearly) absent in the silt and clay fractions. The mean turnover time (MRT) for the pyrolysis products in particulate organic matter (POM) was generally <15 years (fast C pool) and 20–300 years (medium or slow C pools) in silt and clay fractions.