Assessment of Plant Biodiversity around the Tobolsk Industrial Site

The article presents the results of comprehensive studies of the plant biodiversity near the industrial zone of the city of Tobolsk, Tyumen Oblast, Russia. Nine species of formation communities were identified: Abies sibirica Ledeb, Pineta (sylvestris), Betuleta (pendula), Betuleta (pubescens), Tilieta (cordata), Populeta (tremula), Saliceta, Prata, Emersiherbosa. Also, eleven associations were identified for the studied communities: fir forest with sedges, linden and birch; mixed small-leaved dark coniferous forest with sedges; low-shrub sphagnum pine forest; steppe birch forest; swampy low-shrub sphagnum birch forest; swampy reedgrass birch forest; linden-birch forest; cereal-horsetail-fern aspen forest; aspen forest with grass layer; aspen forest mixed with birch and sedges; mixed birch-aspen forb forest; maturing aspen-birch forest with hygrophilous grasses.

The condition of the epiphytic lichens of dark coniferous forest in the area of the outbreak of ips sexdentatus boern on the Maly Abakan site of Khakassky nature reserve

The study presents data on the condition of the thalli of epiphytic lichens, their occurrence and projective cover on the sample plots located in the area of the outbreak of Ips sexdentatus Boern on the Maly Abakan site of Khakassky Nature Reserve.

THE ANTIHYPOXIC ACTIVITY OF SIBERIAN FIR ESSENTIAL OIL FRACTIONS

The component composition and antihypoxic activity of Siberian fir (Abies sibirica) essential oil fractions were researched. The foliage of Siberian fir, collected on the territory of the Ilyinsky district of the Perm region in a dark coniferous forest was the raw material for obtaining the essential oil. Samples for the research were collected in December 2018 from trees 40–50 years old. The essential oil was obtained with the Clevenger apparatus. Determination of the component composition of Siberian fir essential oil fractions was made by using chromatography-mass-spectrometry. Experiments for determination of antihypoxic activity of Siberian fir essential oil fractions were made on a hypoxic hypoxia model with hypercapnia. According to the results of the research, it was found that the first fraction is more saturated with monoterpene compounds, but the proportion of sesquiterpenoids increases in following fractions. The main components of all fir oil fractions are: bornylacetate, limonene, ∆3-carene, karyophyllene. It was found that the fractions 1 and 2 have the highest antihypoxic activity in comparison with the reference sample. For further research, we offer fraction 1, because it contains the high level of bornylacetate, and the lowest content of ∆3-carene, which inhibits the ubiquinol cytochrome-C reductase complex, interrupting mitochondrial and cell respiration.

Estimation of the vegetation diversity of the Western Tannu-Ola Range

This paper discusses the main indicators diversity of vegetation in key areas of the northern macro slope of the Western Tannu-Ola Range. The degree of forest cover and vegetation fragmentation were estimated using Landsat-TM/ ETM+/OLI images for June 25, 1992, June 18, 1998 and June 24, 2015 in QGIS using the plugin Landscape Ecology. The Simpson index shows of increasing biodiversity in different altitudes. The results showed that with increasing climate warming in the region and maintaining this trend, the proportion of dark coniferous forest at all altitude levels (foothill, mid-elevation and high-elevation zones) will increase. And this led to a decrease in the fragmentation of the forest cover of northern macro slope of this range.

Face DetectNet: face detection via fully-convolutional network

The paper deals with a new method of testing hypotheses for the distribution of multidimensional remote sensing spectral data. The proposed technique is based on the use of nonparametric algorithms for pattern recognition. Testing the hypothesis of the identity of two laws of distributions of multidimensional random variables is replaced by testing a hypothesis stating that the pattern recognition error equals 0.5. The application of this technique allows doing without the decomposition of the random variable domain into multidimensional intervals, which is typical for the Pearson criterion. Its effectiveness is confirmed by the results of testing the hypotheses of the distribution of spectral data of remote sensing in forestry. The analysis of the distribution laws for the following types of forestry is carried out: dark coniferous forest, damaged and dry forest stands. The initial information was obtained from the southern Siberia remote sensing data using six spectral channels of Landsat. The results of the research form a basis for a set of significant spectral features when dealing with forest condition monitoring.

Epiphytic lichens of the dark coniferous forest within the outbreak of Ips sexdentatus Boern. in the Maly Abakan site of the Khakassky Nature Reserve

The article demonstrates the results of studies epiphytic lichens species composition from the territory of the Khakassky State Nature Reserve, conducted in the alpine cedar taiga at the location of the Ips sexdentatus outbreak. There were two types of sample plots: damaged plots, characterized by shriveled cedars infected by bark beetle and flawless plots containing forest stand of primarily vigorous trees. All sample plots were found to comprise 46 species of lichens belonging to 24 genera and 13 families. It was observed that plots infected by bark beetle were inhabited by lichens with poor vital activities manifested by their damaged thalli. However, there were no evident changes in the epiphytic lichen communities on floristic and coenotic levels.

Phytoliths in soils of hemiboreal dark coniferous forest in southeast of West Siberia

Проведенный сравнительный анализ фитолитных комплексов геохимически сопряженных и эволюционно-генетических рядов почв двух морфоскульптур (Васюганская наклонная и Колывань-Томская равнины) лесных ландшафтов юга Западной Сибири показал возможность использования фитолитного анализа в решении почвенно-эволюционных вопросов. Результаты исследования обработаны методом главных компонент. Выявлены факторы, повлиявшие на изменения фитоценозов и типов почвообразования в регионе на протяжении второй половины голоцена. Изменения состава фитоценозов определялись сменой климата и частотой пожаров. Лугово-болотная и луговая стадии почвообразования более ярко выражены в фитолитных комплексах почв Васюганской равнины. Гидроморфное и полугидроморфное почвообразование на Колывань-Томской равнине имело локальное распространение (только в почвах пониженных форм рельефа). Кроме того, на растительный покров Колывань-Томской дренированной равнины значительное влияние оказывал пирогенный фактор.