Aleksandr Egorov

Saint Petersburg State University | SPBU · Department of Biogeography and Conservation

The detailed floristic inventory of Nam Dong Conservation Area was undertaken during 2015-2021. For the survey, 11 plots were established and studied. Herbarium specimens for almost all observed plant species were collected in the studied area. They were used for identifications and documentation of plants cited in in this report. The study pays sp...

The «Catalogue» contains information about the type specimens relating to the names of 2995 different taxa from 725 genera and 121 families of lower and higher plants from different regions of the world stored in the Herbarium im. I.P. Borodin St. Petersburg Saint-Petersburg State Forestry University (KFTA), of which about 470 specimens belong to 9...

The emerald ash borer (Agrilus planipennis Fairmaire) was introduced to Moscow, from where it began active radial spreading since the mid-2000s outbreak, advancing in the northern directions much less than in the southern ones. Agrilus planipennis is able to spread both by fl ight and by hitchhiking, covering long distances directly on vehicles or...

The ethnobotanical survey was made among the Thai, Muong, and Kinh tribes in the Nam Dong Commune, Quan Hoa District, Thanh Hoa Province of northern Vietnam. The investigation mainly focused on the plants used for various non-medicinal purposes (like basket and rope making, construction, traditional decorations, the fish poison, food, and forage) t...

The study was to assess the role of homesteads in the mountains of Northern Vietnam to solve the food problems of the homesteads. The object of the study was the traditional experience of the local population of the village of Lo from the Commune of Nam Dong (Quan Hoa district in Northern Vietnam).

The "Catalogue" contains information about the type specimens relating to the names of 1588 different taxa from 69 families of lower and higher plants from different regions of the world stored in the Herbarium im. I.P. Borodin St. Petersburg Saint-Petersburg State Forestry University (KFTA), of which about 200 specimens belong to taxa of various r...

Hemiboea chanii , a new species of Gesneriaceae from Ha Giang Province, northern Vietnam, is here described and illustrated. It has many branched stems, diamond-shaped involucre with two cirrose opposite apices, a pink corolla, red spotted inside, and a flowering time in January-February. Among congeners with an externally hairy corolla, this new s...

Wild edible plants play an important role in ensuring food and livelihood security for most ethnic minorities occurring in Pu Luong Nature Reserve. These plants are commonly consumed as raw fresh or cooked vegetables. In this study, scientific and local names, utilized plant parts along with habit and indigenous uses were identified. The study iden...

The flora of two towns and two settlements in the northern taiga and forest-tundra of Northwest Siberia (Russia) are considered. Urban species lists are limited (61–119 vascular plant species) and mainly consist of native species with a predominance of perennial herbs. Various urban functional zones (industrial, residential, recreational, vegetable...

Hemiboea chanii , a new species of Gesneriaceae from Ha Giang Province, northern Vietnam, is here described and illustrated. It has many branched stems up to 90 cm, with 12–16 nodes, involucre diamond with two cirrose opposite apexs, pink corolla with red spotted inside, and flowering time in January–February. Among congeners with abaxially hairy c...

From eight years, 2012–2019, of field research, critical work in herbariums and literature reviews, we have established and identified as alien in the Yamal-Nenets Autonomous Area (YaNAA) a list of 216 vascular plant species from 144 genera and 35 families. The set of the ten richest families, by the number of species, alters in that the alien flor...

The survey was completed in assistance with ethnic groups living in Nam Dong Conservation Area in June-August 2019. The study was focused on the dicotyledonous plants used in Nam Dong Conservation Area as a food plants. Observed and documented plants belong to 49 species and 33 families; among them 21 trees, 10 shrubs, 12 herbs, and 6 lianas. These...

During the field works 2017-2019, we collected herbarium specimens of conifers in limestone area of Nam Dong Conservation Area, Thanh Hoa Province, northern Vietnam. They belong to six genera and five families (Cephalotaxaceae, Gnetaceae, Pinaceae, Podocarpaceae, and Taxaceae). Studied species are identified by IUCN Red List as EN (one species), VU...

Based on the material of 481 geobotanical descriptions with the participation of Lonicera xylosteum L., the types of forest biogeocenoses in which it grows are determined, and the ordination of geobotanical descriptions is carried out in accordance with the environmental scales of L.G. Ramensky (1956).

The study was to assess the role of homesteads in the mountains of Northern Vietnam to solve the food problems of the homesteads. The object of the study was the traditional experience of the local population of the village of Lo from the Commune of Nam Dong (Quan Hoa district in Northern Vietnam).

The north of Western Siberia has seen intensive economic development. Exploration and mining for mineral resources, active road and pipeline construction, urban development, and agriculture favor invasion and dispersal of alien plant species across the Subarctic region. The paper reports new records for eight alien species and hybrids previously un...

Development of the North of Western Siberia is progressing rapidly. It is accompanied by the growth and emergence of new settlements. Creating green spaces in the harsh conditions of the North is a responsible thing. To work out a sustainable trees and shrubs assortment 15 experimental sites were laid in 2013-2016. They are located in different cli...

The results of long-term monitoring observations of natural recovery successions in the tundra and forest-tundra zones in various sectors of the Russian Arctic are analyzed. Efficiency of works on accelerated nature restoration is evaluated. Particular attention is paid to the analysis of mistakes made in the quarries reclamation projects. The comb...

In the course of floristic researches in Priuralsky district of Yamalo-Nenets Autonomous Region (YANAR) we have made new findings complementing the species composition of vascular flora in the territory of the Region. Below we present the data on 10 new species of alien vascular plants for the YANAR flora collected by us in 2016 year - Carduus cris...

Abies gracilis Kom. (Pinaceae) is one of the rarest and endangered conifers in the Russian flora, which must be cultivated ex situ to ensure its survival. Cuttings of A. gracilis do not take root without biostimulants. We used a selection of biostimulants, concentrations, and conditions of their use to significantly increase Abies gracilis rooting,...

The article contains information about the records of 43 species of alien vascular plants made in the Yamalo-Nenets Autonomous District. Field surveys were carried out in 2012-2016. The detected invasive species were growing on wasteland, abandoned and new lawns, in ditches and on roadsides. A majority of the reported species (Avena fatua, A. sativ...

We analyzed the factors limiting the distribution of the white spruce (Picea glauca) in North America and the ecological amplitudes of the species in relation to these factors. Based on these data, an ecogeographical model of spruce dispersal was built. It is shown that the northbound dispersal of White Spruce in North America is limited by heat su...

Semenov’s Fir (Abies semenovii B. Fedtsch.) is an extremely rare species in the wild and is included in the International Red List of Conifers and into the Red Data Books of the former USSR and Kyrgyz Republic. Our investigation confirms that this is an independent species, related but not identical to Abies sibirica Ledeb. It has been cultivated a...

Analysis of the genetic diversity of the spruce populations in the northwest of the European part of Russia using microsatellite markers revealed two relatively isolated genetic clusters. One of them is composed of trees that were identified as P. abies according to morphological traits. Another cluster unites spruces that were determined as P. obo...

Analysis of genetic diversity of spruce populations in northwest Russia using microsatellite markers revealed two moderately distinctive genetic clusters. One of them combined trees that were determined by morphological featuers as P. abies. The other cluster included trees identified as P. obovata and P. fennica. The SSR analysis does not support...

The history of study, distinctive morphological traits of vegetative and reproductive organs, and geographical distribution of Picea fennica (Regel) Kom. and closely related P. abies (L.) H. Karst. and P. obovata Ledeb. are presented. It was shown that Finnish spruce occurs in two main forms: close to P. abies and to P. obovata. Also distinguished...