Romul_Hum—A model of soil organic matter formation coupling with soil biota activity. II. Parameterisation of the soil food web biota activity

Chertov, Oleg; Komarov, Alexander; Shaw, Cindy; Быховец, С. С.; Frolov, P.A.; Shanin, Vladimir; Grabarnik, Pavel; Priputina, Irina; Zubkova, Elena; Shashkov, Maxim

doi:10.1016/j.ecolmodel.2016.10.024

Cited by 36 publications

(39 citation statements)

References 98 publications

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“…This is at least partly explained by the failure of the exponential models to take into account the slow decomposition rate at the early stages of decomposition (Figures a and b). In addition, organic matter stabilization by fungi or other soil biota during the decomposition process (Chertov et al, ; Komarov et al, ) may explain slow decomposition rate of the remaining fraction in the late decay phases.…”

Section: Discussionmentioning

confidence: 99%

Carbon flux from decomposing wood and its dependency on temperature, wood N₂ fixation rate, moisture and fungal composition in a Norway spruce forest

Rinne‐Garmston

Peltoniemi

Chen

et al. 2019

Global Change Biology

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Globally 40–70 Pg of carbon (C) are stored in coarse woody debris on the forest floor. Climate change may reduce the function of this stock as a C sink in the future due to increasing temperature. However, current knowledge on the drivers of wood decomposition is inadequate for detailed predictions. To define the factors that control wood respiration rate of Norway spruce and to produce a model that adequately describes the decomposition process of this species as a function of time, we used an unprecedentedly diverse analytical approach, which included measurements of respiration, fungal community sequencing, N2 fixation rate, nifH copy number, 14C‐dating as well as N%, δ13C and C% values of wood. Our results suggest that climate change will accelerate C flux from deadwood in boreal conditions, due to the observed strong temperature dependency of deadwood respiration. At the research site, the annual C flux from deadwood would increase by 27% from the current 117 g C/kg wood with the projected climate warming (RCP4.5). The second most important control on respiration rate was the stage of wood decomposition; at early stages of decomposition low nitrogen content and low wood moisture limited fungal activity while reduced wood resource quality decreased the respiration rate at the final stages of decomposition. Wood decomposition process was best described by a Sigmoidal model, where after 116 years of wood decomposition mass loss of 95% was reached. Our results on deadwood decomposition are important for C budget calculations in ecosystem and climate change models. We observed for the first time that the temperature dependency of N2 fixation, which has a major role at providing N for wood‐inhabiting fungi, was not constant but varied between wood density classes due to source supply and wood quality. This has significant consequences on projecting N2 fixation rates for deadwood in changing climate.

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Section: Discussionmentioning

confidence: 99%

Carbon flux from decomposing wood and its dependency on temperature, wood N₂ fixation rate, moisture and fungal composition in a Norway spruce forest

Rinne‐Garmston

Peltoniemi

Chen

et al. 2019

Global Change Biology

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“…This variation in effects can be ascribed in part to soil priming [ 45 – 47 ] and contributes to one of the main pitfalls of climate scenarios: they are based on short-term responses of soil respiration and mostly do not account for responses of soil invertebrates. Chertov et al [ 48 ] made an attempt to quantify the active contribution of soil micro- and mesofauna to the formation of organic matter, might be improved from a functional, trait-driven perspective. Assessing invertebrates active in slowly-decomposing recalcitrant organic matter, like our nematodes, quantifies carbon sequestration and may allow better estimates of soil C budgets and greenhouse gas emissions.…”

Section: Discussionmentioning

confidence: 99%

Unifying the functional diversity in natural and cultivated soils using the overall body-mass distribution of nematodes

Mulder

Maas

2017

BMC Ecol

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BackgroundSustainable use of our soils is a key goal for environmental protection. As many ecosystem services are supported belowground at different trophic levels by nematodes, soil nematodes are expected to provide objective metrics for biological quality to integrate physical and chemical soil variables. Trait measurements of body mass carried out at the individual level can in this way be correlated with environmental properties that influence the performance of soil biota.ResultsSoil samples were collected across 200 sites (4 soil types and 5 land-use types resulting in 9 combinations) during a long-term monitoring programme in the Netherlands and the functional diversity of nematode communities was investigated. Using three commonly used functional diversity indices applicable to single traits (Divergence, Evenness and Richness), a unified index of overall body-mass distribution is proposed to better illustrate the application of functional metrics as a descriptor of land use. Effects of land use and soil chemistry on the functional diversity of nematodes were demonstrated and a combination of environmental factors accounts for the low functional value of Scots Pine forest soils in comparison to the high functional value of heathland soils, whereas human factors account for the low functional and chemical values of arable fields.ConclusionsThese findings show an unexpected high functional vulnerability of nematodes inhabiting clay-rich soils in comparison to sandy soils and support the notion that soil C:N ratio is a major driver of biodiversity. The higher the C:N ratio, the higher the overall diversity, as soil nematodes cope better with nutrient-poor agroecosystems under less intense fertilization. A trait-based way focusing on size distribution of nematodes is proposed to maintain environmental health by monitoring the overall diversity in soil biota, keeping agriculture and forestry sustainable. Electronic supplementary materialThe online version of this article (10.1186/s12898-017-0145-9) contains supplementary material, which is available to authorized users.

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“…В дальнейшем, разработанная модель будет интегрирована с уже существующими моделями корневой [127] и кроновой [25] конкуренции, моделью динамики органического вещества почвы Romul_Hum [153][154][155] и рядом других компонентов, которые будут объединены в рамках новой версии модели EFIMOD. Как и предыдущие версии, она будет ориентирована на моделирование динамики биогенного круговорота органического вещества и азота в разных типах лесных экосистем с учетом разнообразных сценариев лесопользования и их экологических последствий, а также внешних воздействий.…”

Section: заключениеunclassified

Parameterization of Productivity Model for the Most Common Trees Species in European Part of Russia for Simulation of Forest Ecosystem Dynamics

Shanin¹,

Grabarnik²,

Быховец³

et al. 2019

Math.Biol.Bioinf.

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The proposed model is the version of well-known biomass production model 3-PG (Physiological Principles Predicting Growth), which allows for calculation of biomass production in dependence of consumed soil nitrogen and available solar radiation. The model utilizes the concept of modifiers, i.e. functions describing the effect of tree age and environmental factors (air temperature and humidity, soil moisture, carbon dioxide concentration) on productivity. To make the model applicable to mixed forests of European Russia, the substantial modifications were implemented. In particular, more detailed response functions to air temperature, soil moisture and absorbed nitrogen were introduced. We also implemented new procedure of calculation of light use efficiency taking into account the difference between shade-tolerant and shade-intolerant tree species. The rank distribution equation was used for the description of an increment allocation to different tree biomass compartments. Model parameters were estimated for the 12 most common tree species of European Russia. The model was implemented as sub-routine for calculation of biomass production in forest ecosystem model EFIMOD 2. The model performance was tested against the wide range of environmental conditions.

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Romul_Hum—A model of soil organic matter formation coupling with soil biota activity. II. Parameterisation of the soil food web biota activity

Cited by 36 publications

References 98 publications

Carbon flux from decomposing wood and its dependency on temperature, wood N₂ fixation rate, moisture and fungal composition in a Norway spruce forest

Carbon flux from decomposing wood and its dependency on temperature, wood N₂ fixation rate, moisture and fungal composition in a Norway spruce forest

Unifying the functional diversity in natural and cultivated soils using the overall body-mass distribution of nematodes

Parameterization of Productivity Model for the Most Common Trees Species in European Part of Russia for Simulation of Forest Ecosystem Dynamics

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Romul_Hum—A model of soil organic matter formation coupling with soil biota activity. II. Parameterisation of the soil food web biota activity

Cited by 36 publications

References 98 publications

Carbon flux from decomposing wood and its dependency on temperature, wood N2 fixation rate, moisture and fungal composition in a Norway spruce forest

Carbon flux from decomposing wood and its dependency on temperature, wood N2 fixation rate, moisture and fungal composition in a Norway spruce forest

Unifying the functional diversity in natural and cultivated soils using the overall body-mass distribution of nematodes

Parameterization of Productivity Model for the Most Common Trees Species in European Part of Russia for Simulation of Forest Ecosystem Dynamics

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Carbon flux from decomposing wood and its dependency on temperature, wood N₂ fixation rate, moisture and fungal composition in a Norway spruce forest

Carbon flux from decomposing wood and its dependency on temperature, wood N₂ fixation rate, moisture and fungal composition in a Norway spruce forest