44 research outputs found

    Rare lichens, mosses, liverworts and fungi from the Republic Sakha (Yakutia), Russia

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    The Republic of Sakha (Yakutia) is situated in the north-east of Siberia. The area of Yakutia (3 103 200 km2) occupies one-fifth of the Russian Federation’s territory. In total 1984 species of vascular plants, 523 of mosses, 199 of liverworts, 703 of lichens, 911 of fungi and 2476 of algae are known in Yakutia. Among them 19 species of vascular plants, 6 of mosses, 8 of liverworts, 2 of lichens, and 2 species of fungi are included in the Red Data Book of the Russian Federation (2008). In this study all currently available information about locations of red-listed mosses, hepatics, lichens, and fungi on the territory of the Sakha Republic, is provided. Diverse climatic and edaphic conditions of Yakutia provide a wide range of ecological niches for the growth of species of different ecological requirements. Most of the rare species included in the Red Data Book of Russian Federation have narrow ecological amplitude. Majority of the species was recorded in mountain ecosystems on rocky outcrops, especially on limestone, at the banks of rivers and streams, and in old-growth boreal forests

    Biliary Microbiota, Gallstone Disease and Infection with Opisthorchis felineus.

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    BACKGROUND: There is increasing interest in the microbiome of the hepatobiliary system. This study investigated the influence of infection with the fish-borne liver fluke, Opisthorchis felineus on the biliary microbiome of residents of the Tomsk region of western Siberia. METHODOLOGY/PRINCIPAL FINDINGS: Samples of bile were provided by 56 study participants, half of who were infected with O. felineus, and all of who were diagnosed with gallstone disease. The microbiota of the bile was investigated using high throughput, Illumina-based sequencing targeting the prokaryotic 16S rRNA gene. About 2,797, discrete phylotypes of prokaryotes were detected. At the level of phylum, bile from participants with opisthorchiasis showed greater numbers of Synergistetes, Spirochaetes, Planctomycetes, TM7 and Verrucomicrobia. Numbers of \u3e 20 phylotypes differed in bile of the O. felineus-infected compared to non-infected participants, including presence of species of the genera Mycoplana, Cellulosimicrobium, Microlunatus and Phycicoccus, and the Archaeans genus, Halogeometricum, and increased numbers of Selenomonas, Bacteroides, Rothia, Leptotrichia, Lactobacillus, Treponema and Klebsiella. CONCLUSIONS/SIGNIFICANCE: Overall, infection with the liver fluke O. felineus modified the biliary microbiome, increasing abundance of bacterial and archaeal phylotypes

    Climate Change, Growth, and California Wildfire

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    Large wildfire occurrence and burned area are modeled using hydroclimate and landsurface characteristics under a range of future climate and development scenarios. The range of uncertainty for future wildfire regimes is analyzed over two emissions pathways (the Special Report on Emissions Scenarios [SRES] A2 and B1 scenarios); three global climate models (Centre National de Recherches Météorologiques CM3, Geophysical Fluid Dynamics Laboratory CM21 and National Center for Atmospheric Research PCM2); a mid‐range scenario for future population growth and development footprint; two model specifications related to the uncertainty over the speed and timing with which vegetation characteristics will shift their spatial distributions in response to trends in climate and disturbance; and two thresholds for defining the wildland‐urban interface relative to housing density. Results were assessed for three 30‐year time periods centered on 2020, 2050, and 2085, relative to a 30‐year reference period centered on 1975. Substantial increases in wildfire are anticipated for most scenarios, although the range of outcomes is large and increases with time. The increase in wildfire area burned associated with the higher emissions pathway (SRES A2) is substantial, with increases statewide ranging from 57 percent to 169 percent by 2085, and increases exceeding 100 percent in most of the forest areas of Northern California in every SRES A2 scenario by 2085. The spatial patterns associated with increased fire occurrence vary according to the speed with which the distribution of vegetation types shifts on the landscape in response to climate and disturbance, with greater increases in fire area burned tending to occur in coastal southern California, the Monterey Bay area and northern California Coast ranges in scenarios where vegetation types shift more rapidly.National Oceanic and Atmospheric Administration (NOAA) Regional Integrated Science and Assessment Program for California, United StatesCalifornia Climate Change Center/[CEC-500-2009-046-F]//Estados UnidosUnited States Department of Agriculture (USDA) Forest Service Pacific Southwest Research Station///Estados UnidosNational Oceanic and Atmospheric Administration (NOAA) Regional Integrated Science and Assessment Program for California///Estados UnidosUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigaciones Geofísicas (CIGEFI

    Complete genome sequences of gram-positive opportunistic pathogens isolated from hospitals in Almaty, Kazakhstan

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    The genomes are available from NCBI BioProject number PRJNA754843 under the accession numbers shown in Table 1.The appearance of drug-resistant pathogens reduces the therapeutic applicability of antibiotics and increases the rate of hospital infections among patients. Complete genome sequences of four Gram-positive clinical isolates of Streptococcus and Staphylococcus were obtained and analyzed to serve as model microorganisms for further studies on drug-induced antibiotic resistance reversion.Sequencing was funded by grant BR09458960 of the program “Study of Reversion of Antibiotic Resistance of Pathogenic Microorganisms” provided by the Industrial Development Committee of the Ministry of Industry and Infrastructure Development of the Republic of Kazakhstan.https://journals.asm.org/journal/mraam2023BiochemistryGeneticsMicrobiology and Plant Patholog

    Molecular Genetic Characteristics of Different Scenarios of Xylogenesis on the Example of Two Forms of Silver Birch Differing in the Ratio of Structural Elements in the Xylem

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    Silver birch (Betula pendula Roth) is an economically important species in Northern Europe. The current research focused on the molecular background of different xylogenesis scenarios in the birch trunks. The study objects were two forms of silver birch, silver birch trees, and Karelian birch trees; the latter form is characterized by the formation of two types of wood, non-figured (straight-grained) and figured, respectively, while it is currently not clear which factors cause this difference. We identified VND/NST/SND genes that regulate secondary cell wall biosynthesis in the birch genome and revealed differences in their expression in association with the formation of xylem with different ratios of structural elements. High expression levels of BpVND7 accompanied differentiation of the type of xylem which is characteristic of the species. At the same time, the appearance of figured wood was accompanied by the low expression levels of the VND genes and increased levels of expression of NST and SND genes. We identified BpARF5 as a crucial regulator of auxin-dependent vascular patterning and its direct target—BpHB8. A decrease in the BpARF5 level expression in differentiating xylem was a specific characteristic of both Karelian birch with figured and non-figured wood. Decreased BpARF5 level expression in non-figured trees accompanied by decreased BpHB8 and VND/NST/SND expression levels compared to figured Karelian birch trees. According to the results obtained, we suggested silver birch forms differing in wood anatomy as valuable objects in studying the regulation of xylogenesis

    Seroepidemiology and molecular epidemiology of enterovirus 71 in Russia.

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    Enterovirus 71 (EV71) is an emerging human pathogen causing massive epidemics of hand, foot and mouth disease with severe neurological complications in Asia. EV71 also circulates in Europe, however it does not cause large outbreaks. The reason for distinct epidemiological patterns of EV71 infection in Europe and Asia and the risk of EV71 epidemic in Europe and Russia remain unknown. Seroepidemiology of EV71 and molecular epidemiology of occasional EV71 isolates were studied to explore circulation of EV71 in Russia. In six regions of Russian Federation, seroprevalence of EV71 in sera collected in 2008 ranged from 5% to 20% in children aged 1-2 years and from 19% to 83% in children aged 3-5 years. The seroprevalence among elder children was significantly higher (41-83% vs. 19-27%) in Asian regions of Russia. EV71 strains identified in Russia in 2001-2011 belonged to subtypes C1 and C2, while genotype C4 that was causing epidemics in Asia since 1998 emerged in 2009 and became dominant in 2013

    Pseudoalteromonas maricaloris sp. nov., isolated from an Australian sponge, and reclassification of [Pseudoalteromonas aurantia] NCIMB 2033 as Pseudoalteromonas flavipulchra sp. nov

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    A marine, Gram-negative, aerobic bacterium that produced cytotoxic, lemon-yellow, chromopeptide pigments that inhibited the development of sea urchin eggs has been isolated from the Australian sponge Fascaplysinopsis reticulata Hentschel. The cells of the organism were rod-shaped with a single polar flagellum and they required NaCl for growth (0.5--10%) with optimum growth at 1--3% NaCl. The temperature for growth was 10--37 degrees C, with optimum growth at 25--30 degrees C. Growth occurred at pH values from 6.0 to 10.0, with optimum growth at pH 6.0--8.0. Major phospholipids were phosphatidylethanolamine, phosphatidylglycerol and lyso-phosphatidylethanolamine. Of 26 fatty acids with 11--19 carbon atoms that were detected, 16:1omega7, 16:0, 17:1omega8 and 18:1omega7 were predominant. The DNA G+C content was 38.9 mol%. All of these phenotypic and chemotaxonomic characters place the organism in the genus Pseudoalteromonas (Gauthier et al., 1995). These data are consistent with the phylogenetic analyses that confirmed that strain KMM 636(T) is a member of the Pseudoalteromonas cluster in the gamma-subclass of the Proteobacteria. DNA--DNA hybridization experiments revealed that the levels of relatedness between the DNA of the strain studied and DNAs of type strains of the species that clustered together (on the basis of 16S rDNA sequences) and [Pseudoalteromonas aurantia] NCIMB 2033 ranged from 19 to 35%, and that the DNA--DNA homology between [P. aurantia] NCIMB 2033 and other phylogenetically and/or phenotypically similar type strains ranged from 32 to 52%. According to the polyphasic evidence presented in this study, it is proposed that strain KMM 636(T) (=LMG 19692(T)=CIP 106859(T)) be classified as Pseudoalteromonas maricaloris sp. nov. and [P. aurantia] NCIMB 2033 be reclassified as Pseudoalteromonas flavipulchra NCIMB 2033(T) (=KMM 3630(T)=LMG 20361(T)) sp. nov
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