Assessment of Intra-Biogeocenotic Variability of Forest Litters and Dwarf Shrub–Herbaceous Vegetation in Spruce Stands

Semenyuk, O. V.; Телеснина, В. М.; Bogatyrev, L. G.; Benediktova, A. I.; Kuznetsova, Ya. D.

doi:10.1134/s1064229320010135

Cited by 21 publications

(2 citation statements)

References 42 publications

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“…Soddy podzolic soils are developed in the boreal zone (the subzone of the middle taiga) in a humid climate; the soil-forming rock covers loam on moraine deposits represented by heavy red-brown loam of very dense composition with negligible water permeability. The SOM content is less than 1%, pH (KCl) is 4.3-5.3 [43].…”

Section: Samplementioning

confidence: 90%

Temperature Dependences of IR Spectral Bands of Humic Substances of Silicate-Based Soils

2023

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Temperature-dependent IR spectroscopy capable of revealing specific changes in the band intensities, positions, and shape was used to increase the information on humic substances (HS) from soils. Temperature dependences of IR spectra of HS isolated from silicate-based soils differing in the contents and nature of organic matter, chernozem and soddy podzolic soil, were investigated by attenuated total internal reflection FTIR in the mid-IR region (4000–400 cm−1) in the air within the moderate temperature range of 25–215 °C (298–488 K) with a step of 2.5 °C. The dependences of shifts in frequency (wavenumber) corresponding to band maxima and integrated band intensities were built for all major bands. Observed reversible frequency shifts upon heating and cooling can be interpreted as forming structures in the dry state. The behavior of integrated intensities of bands assigned to C–H and C–C vibrations, characteristic vibrations of polyaromatic compounds, carboxylic acids, and carboxylates were shown, and similar behavior for the same group (symmetric and antisymmetric stretches) were revealed. Differences in the temperature trends in chernozem and soddy podzolic soils due to different structures (aliphatic and aromatic) and functional groups (carboxylic and carboxylate) are shown. The different behavior of the bands corresponding to carboxylic groups and skeletal vibrations differentiates soil types with different organic matter. The temperature trends of band maximum and intensity shifts are less prone to measurement conditions and may serve as qualitative parameters characterizing the composition of soil humic substances.

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Section: Samplementioning

confidence: 90%

Temperature Dependences of IR Spectral Bands of Humic Substances of Silicate-Based Soils

2023

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“…Deadwood reaching above the compact layer of undecomposed beech litter thus locally becomes the only substrate which can be colonized by vascular plants (Orman et al 2016). In dispersed mountain spruce forests, the herb layer is not so limited by litter (Semenyuk et al 2020), which may explain the highest proportion of species with their optimum on soil substrate in this forest type.…”

Section: Discussionmentioning

confidence: 99%

Can deadwood be preferred to soil? Vascular plants on decaying logs in different forest types in Central Europe

Unar,

Daněk,

Adam

et al. 2023

Eur J Forest Res

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Deadwood is known to be an irreplaceable substrate for various groups of organisms but its importance for vascular plants is still unclear. To examine which deadwood characteristics promote its colonization by vascular plants and whether species can prefer this substrate to mineral soil (or vice versa), we used regression modelling and ordination methods to analyse an extensive data set of vegetation records from more than 1800 pieces of lying deadwood and 200 control plots on soil. Data were collected in four oldgrowth forest sites ranging from lowland alluvial to mountain spruce forests. Colonization of deadwood of all decay classes, including freshly fallen logs, was frequent at all study sites. The density of colonizers differed between deadwood species, increased with deadwood decomposition stage and was higher when deadwood was exposed to light. On average, about 40% of observed species showed a preference for either deadwood or soil substrate with preference for soil usually being more common.Species that preferred deadwood to soil were typically early successional species, while those with preference for soil were often hygrophytes or typical understorey species. Most species responded consistently to substrate across multiple sites. With its unique microsite conditions and speci c composition of plant colonizers, we highlight the importance of deadwood for herb layer species composition. Deadwood retention should be encouraged not only in protected but also in commercial forests.

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Carbon stock in litter of middle taiga forest ecosystems of Central Siberia

Sergeeva

Mukhortova

Krivobokov

2021

IOP Conf. Ser.: Earth Environ. Sci.

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Litter plays an important role in the carbon cycle of forest ecosystems incorporating significant amount of carbon as a result of annual partial die-off of the biomass and releasing it during complex multistage processes of organic matter decomposition. The balance of these processes in the forests of permafrost zone significantly shifts towards the accumulation of dead organic matter. That makes the assessment of litter stock in these ecosystems particularly relevant, especially in relation to the predicted consequences of climate change in the study region. On the territory of middle taiga of Central Siberia, 14 sampling plots were established in the various landforms (slopes of different exposition, lowlands and uplands). The carbon stock in litter of the main forest types of the studied area varied from 0.47 to 4.46 kgC/m2. Also, the paper considers composition of litter accumulated in these ecosystems, including the ratio between fresh litterfall, fermented and humified plant residues, and dead roots. Our results demonstrated that fermented plant residues prevailed in the litter composition in most types of studied forest ecosystems due to specificity of hydrothermal regime and quality of litterfall. The results obtained might be applied to refine the carbon budget of Siberian forests.

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Assessment of Intra-Biogeocenotic Variability of Forest Litters and Dwarf Shrub–Herbaceous Vegetation in Spruce Stands

Cited by 21 publications

References 42 publications

Temperature Dependences of IR Spectral Bands of Humic Substances of Silicate-Based Soils

Temperature Dependences of IR Spectral Bands of Humic Substances of Silicate-Based Soils

Can deadwood be preferred to soil? Vascular plants on decaying logs in different forest types in Central Europe

Carbon stock in litter of middle taiga forest ecosystems of Central Siberia

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