Specific features of algal communities in forest litter of forest biogeocenoses of the steppe zone

Maltsev, Yevhen; Pakhomov, O. Y.; Maltseva, І. А.

doi:10.1134/s1995425517010085

Cited by 16 publications

(11 citation statements)

References 4 publications

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“…Strain MZ–BH14 was isolated from the fermentation sub-horizon of forest litter in the Pinus pallasiana (D. Don) Holmboe planting. In the algae flora of this litter, H. amphioxys is one of the dominants 36 . Strain MZ–BH15 was isolated from the forest floor in the Pinus sylvestris L. plantation.…”

Section: Resultsmentioning

confidence: 97%

“…Until now, the diversity of representatives of the genus Hantzschia among soil diatoms was reported as H. abundans Lange-Bertalot, H. amphioxys , H. elongata Grunow and H. vivax (W. Smith) Peragallo, including some of their varieties 26 – 34 . H. amphioxys , as the most commonly reported species, has been noted to occur in various ecosystems, from diverse soils, including alkaline 32 or calcareous 26 , soils of halophilic, shrub, meadow, and psammophytic phytocenoses 30 , soil horizons in artificial and natural forests of the steppe zone 33 , 35 , forest litter of pine, oak and white acacia plantations 36 , urban soils 37 and disturbed lands 38 . It was shown that H. amphioxys could dominate even in the steppe soil post-pyrogenic communities 39 and in biological soil crusts after the effects of fire 29 .…”

Section: Introductionmentioning

confidence: 99%

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Biogeography of the cosmopolitan terrestrial diatom Hantzschia amphioxys sensu lato based on molecular and morphological data

Maltsev

Maltseva

Kociolek

et al. 2021

Sci Rep

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Until now, the reported diversity of representatives from the genus Hantzschia inhabiting soils from different parts of Eurasia was limited to the few species H. amphioxys, H. elongata and H. vivax and some of their infraspecific taxa. We have studied the morphology, ultrastructure and phylogeny of 25 soil diatom strains, which according to published description would be assigned to “H. amphioxys sensu lato” using 18S rDNA, 28S rDNA and rbcL. We show that strains are made up of seven different species of Hantzschia, including five new for science. Five strains were identified as H. abundans. This species has a slight curvature of the raphe near its external proximal ends. Four of the examined strains were represented by different populations of H. amphioxys and their morphological characteristics fully correspond with its isolectotype and epitype. The main specific features of this species include 21–25 striae in 10 μm, 6–11 fibulae in 10 μm, 40–50 areolae in 10 μm and internal proximal raphe endings bent in opposite directions. H. attractiva sp. nov., H. belgica sp. nov., H. parva sp. nov., H. pseudomongolica sp. nov. and H. stepposa sp. nov. were described based on differences in the shape of the valves, significant differences in dimensions, a lower number of striae and areolae in 10 μm and the degree and direction of deflection of the internal central raphe endings. Based on the study of the morphological variability and phylogeny of soil Hantzschia-species from different geographical locations we conclude that while some species such as H. amphioxys are truly cosmopolitan in their distributions, some sympatric populations of pseudocryptic taxa exist in the Holarctic.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Biogeography of the cosmopolitan terrestrial diatom Hantzschia amphioxys sensu lato based on molecular and morphological data

Maltsev

Maltseva

Kociolek

et al. 2021

Sci Rep

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“…On the other hand, the change of the species habitat in different seasons gives evidence of a change in the conditions of algae existence (temperature and water regime, biological activity, etc.) (Scherbina et al, 2014;Maltsev et al, 2017a).…”

Section: Discussionmentioning

confidence: 99%

New finding of green algae with potential for algal biotechnology, Chlorococcum oleofaciens and its molecular investigation

Maltsev

Коноваленко

2017

Regul. Mech. Biosyst.

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The practice of soil algology shows that algae from the order Chlamydomonadales are among the most poorly studied and difficult to identify due to the high heterogeneity of their morphology and ultrastructure. Only the involvement of molecular genetic methods usually makes it possible to determine their taxonomic status with high accuracy. At the same time, in the algae flora of Ukraine there are more than 250 species from the order Chlamydomonadales, the status of which in most cases is established exclusively on the basis of light microscopy. This work is devoted to the study of the biotechnologically promising green alga Chlorococcum oleofaciens, taking into account the modern understanding of its taxonomic status. Two new strains of this species, separated from samples of forest litter and oak forest soil (the Samara Forest, Dnipropetrovsk region), are described. The strains were studied at the morphological level by using light microscopy methods, as well as using molecular genetic methods based on the studies of the nucleotide genes sequences of the 18S ribosomal DNA (rDNA) and chloroplast rbcL genes, the topology of secondary structures of internal transcribed spacer 2 (ITS2). The obtained results helped to confirm the presence of C. oleofaciens in the algae flora of Ukraine. Also, the authors of the article discuss the differences in the secondary structure of ITS2 in different strains of C. oleofaciens associated with the presence of compensatory base change (CBC), hemi-CBC in helices I and II, as well as deletions in helix IV and providing a basis for the hypothesis of the existence of cryptic species within C. oleofaciens. The obtained data can be used at the stage of preliminary selection of biochemical research objects.

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“…However, data on the algae of leaf litter are scanty. Maltsev et al (2017a) have recently studied the structural and dynamic parameters of the algal communities of the anthropogenic and natural forests in the steppe zone of Ukraine and found that the composition of communities varies by season and forestforming tree species. The authors identified 119 algae species belonging to six divisions: Chlorophyta (68 species), Xanthophyta (21 species), Cyanoprocaryota (17 species), Bacillariophyta (seven species), Eustigmatophyta and Charophyta (three species each).…”

Section: Vocs From Litter-decomposing Microbesmentioning

confidence: 99%

Reviews and syntheses: VOC emissions from soil cover in boreal and temperate natural ecosystems of the Northern Hemisphere

Isidorov

Zaitsev

2022

Preprint

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Abstract. The purpose of this review is to draw attention to the decaying litter of trees and the living soil cover of forests, as poorly considered sources of photochemically active components of the Earth’s atmosphere. Plant litter decomposition is a biogeochemical process underlying the carbon cycle in terrestrial ecosystems and between the biosphere and the atmosphere. For the latter, it serves as one of the most important sources of not only carbon dioxide, but also volatile organic compounds (VOCs), which have not yet been taken into account in atmospheric models for various purposes and scales, from local to large regional and global. This review owes its appearance to the growing interest in decaying leaf litter and living forest floor cover as a hitherto unaccounted-for source of photochemically active components of the Earth’s atmosphere. This interest is understandable if we take into account the size of this source: for terrestrial ecosystems, the global production of litter is at 10 × 1016 g dry matter. The living vegetation cover of the soil on the forest floor, mainly comprising mosses and small shrubs, should also be regarded as a potentially significant source of atmospheric VOCs, as its total biomass may be comparable to or even exceed that of canopy foliage, which is considered the main source of these compounds. This implies a need to integrate these sources into biogenic VOC emission models, which in turn requires extensive research on these sources to understand the conditions and factors that influence VOC emissions. The decomposition of leaf litter, accompanied by the release of VOCs, is a very complex process that depends on a number of biological, chemical and physical environmental factors, but little information is currently available on the role each plays. Equally limited is information on the chemical composition and emission rates of VOCs from these sources. The review focuses on the main gaps in our knowledge of the sources of biogenic VOCs under the forest canopy, and we are confident that filling them will make a significant contribution to solving such an important task as closing the global organic carbon budget.

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Specific features of algal communities in forest litter of forest biogeocenoses of the steppe zone

Cited by 16 publications

References 4 publications

Biogeography of the cosmopolitan terrestrial diatom Hantzschia amphioxys sensu lato based on molecular and morphological data

Biogeography of the cosmopolitan terrestrial diatom Hantzschia amphioxys sensu lato based on molecular and morphological data

New finding of green algae with potential for algal biotechnology, Chlorococcum oleofaciens and its molecular investigation

Reviews and syntheses: VOC emissions from soil cover in boreal and temperate natural ecosystems of the Northern Hemisphere

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