Geobotanical studies at the Caucasus: a review of materials of the International Conference “Flora and conservation in the Caucasus: history and current state of knowledge” (Pyatigorsk, May 22–25, 2019)

2019 ◽  
pp. 91-94
Author(s):  
T. M. Lysenko ◽  
V. Yu. Neshatayeva ◽  
Z. V. Dutova

The International conference “Flora and conservation in the Caucasus: history and current state of knowledge” dedicated to the 130-year anniversary of the Perkalsky Arboretum took place at 22–25 of May 2019 in Pyatigorsk (Stavropol Territory) on the base of the Pyatigorsk Museum of local lore and natural history. The participants were from 11 cities of Russia and 7 Republics of the Caucasus and represented 14 institutions. Proceedings of the conference were published by the beginning of the meeting the book of abstracts includes 49 papers on the study of vascular plants, bryophytes, lichens and fungi, plant communities, as well as the protection of rare and endangered species, unique plant communities, and ecological problems in the Caucasus. The following geobotanical topics were highlighted in 13 papers: forest communities (3 reports), meadow and steppe vegetation (2), xeric open forests (2), communities of ecotone areas (1), structure of populations of rare plant species (3), as well as the history and current status of nature protected areas (2). The great emphasis has been focused on the study of floristic composition and plant populations. Thus, the conference showed that very few studies от vegetation are currently carried out in the Caucasus, and a lot of districts are not affected by the research. The greatest attention is paid to forest vegetation while meadow, steppe, alpine heath and xerophytic communities are studied rather poorly. Besides, there are “white spots” — mire, floodplain and aquatic vegetation. In nowadays, when the anthropogenic impact on the plant cover of the Caucasus is intensively increasing, it is especially important to study natural undisturbed communities preserved in protected natural areas. Another important issue is the conservation of the unique vegetation cover of the whole Caucasus. Thus, the study of vegetation of this region opens a wide field for researchers using various methods of modern plant science.

Biologia ◽  
2010 ◽  
Vol 65 (6) ◽  
Author(s):  
Ján Kliment ◽  
Jozef Šibík ◽  
Ivana Šibíková ◽  
Ivan Jarolímek ◽  
Zuzana Dúbravcová ◽  
...  

AbstractThis paper presents a survey of high-altitude plant communities which occur in the Western Carpathians with an enumeration of the characteristic, transgressive and differential species of the individual alliances, orders and classes. It describes the tall-herb vegetation (Mulgedio-Aconitetea) and communities of the subalpine shrubs (Betulo carpaticae-Alnetea viridis), the montane and alpine calcareous swards (Elyno-Seslerietea), the wind-exposed cryophilous swards on ridge edges with low snow cover (Carici rupestris-Kobresietea bellardii), the chionophilous communities of snow beds and snow fields (Salicetea herbaceae), the arctic-boreal dwarf-shrub heathlands (Loiseleurio-Vaccinietea), the alpine acidophilous grasslands (Caricetea curvulae) and the high-mountain mat-grass swards of the alliance Nardion strictae (Nardetea strictae).This study summarises the results of the syntaxonomical and nomenclatural revisions of various types of high-altitude vegetation in the Western Carpathians and the longstanding research in the field. The aim of this paper is to amass knowledge about the nomenclatural features, such as the synonyms, original diagnoses and nomenclatural types of the higher syntaxa in the Western Carpathians, that will be important and useful for a forthcoming vegetation survey of highrank syntaxa of Europe (EuroChecklist). It reflects the current status of knowledge regarding the floristic composition and distribution of high-altitude (alpine) non-forest communities in Slovakia.The fourth volume of Plant Communities of Slovakia, which discusses high-altitude vegetation, was recently published. This paper, however, contains some corrections and improvements to the concepts. It is presented in a compact form and in English, which makes it more accessible by international readership.


Bothalia ◽  
1981 ◽  
Vol 13 (3/4) ◽  
pp. 557-567 ◽  
Author(s):  
H. C. Taylor ◽  
F. Van der Meulen

Structure and floristic composition of the plant cover were used to establish separate classifications of plant communities in Mountain Fynbos on Rooiberg, South Africa. The structural units and floristic associations closely correlate with each other and their distribution reflects the major environmental influences, aspect and altitude. It is concluded that, despite the preliminary character of the survey, resource inventories of this type are suitable as a foundation for park management.


2018 ◽  
pp. 129-136 ◽  
Author(s):  
V. B. Golub

The paper follows the series of publications in “Vegetation of Russia” devoted to L. G. Ramensky (Golub, 2013, 2014, 2017 a,b). It tells about the first field trip by Ramensky together with V. P. Savich in 1907 on the northwest of the St. Petersburg province, where they under the guidance by V. L. Komarov studied the vegetation of lakes and swamps. Undoubted interest in the biography by Ramensky is represented by his choice of the direction by which he moved into the field of phytocenology. We tried to search for the reasons that pushed him to the chosen path in the impressions and experience that he took out in the first expedition in his life One of the sources of information about this expedition was the Savich’s archive at the Komarov Botanical Institute of the Russian Academy of Sciences, that contains the photo album with the photographs taken in 1907. The second important source of the events of that summer were the letters (now stored in the Archive of the Russian Aca­demy of Sciences) by Ramensky and Savich, which they sent to Komarov. Entering the St. Petersburg University in 1906, Ramensky began fr om the very first days to take part in the work of the student scientific botanical society. With a group of students, he made several excursions in St. Petersburg vicinity under the leadership by A. A. Elenkin, collecting mosses and lichens. Then together with Savich, he in the course of the whole year was engaged in their identifying. However, in 1907 they both went to another head, namely to V. L. Komarov, who began to supervise the student botanical society. Thanks to Komarov Ramensky and Savich get a business trip sponsored by the St. Petersburg Socie­ty of Naturalists to Gdov and Yamburg regions of the St. Petersburg province where they studied the flora and vegetation of the lakes and swamps The beginning of this expedition was not successful. The first point where they stopped was Ust-Narva in Estlandia, where Ramensky fell ill, that made further participation in field researches very problematic. Fortunately, he quickly recovered. Judging by the Komarov’s photo on the cape Kolganpya on the Soykinskiy Peninsula in the Savich’s album, he visited his pupils and made excursions along together with them. Ramensky and Savich reported the results of their first expedition at a meeting of the student scientific botanical society, as well as to the Imperial St. Petersburg Society of Naturalists. One of the reports, made by Ramensky on March 19, 1908, was entitled “On the сomparative method of ecological investigation of plant communities”. The title of this report literally coincides with that which he made two years later at the 12th Congress of Russian Naturalists and Physicians. The idea of continuum in the plant cover was set forth in the published abstract (Ramensky, 1910). The question is legitimate: “Was it really enough the only field season to come to the idea so not ordinary for his time”? We have to admit that yes. Plant communities of lakes, swamps, especially coastal-aquatic phytocenoseses are greatly appropriate for such conclusions. Especially obviously the changes in plant populations are seen when moving fr om the water edge of the lake up the slope of the shore, wh ere soil moisture gradually decreases. However, this was not the only reason for a new look at the vegetation cover. In 1906–1907 Ramensky closely communicated with Elenkin, who developed the theory of “mobile equilibrium” in the relationship of living organisms among themselves and with their environment. Later this theory became for Ramensky the basis from which he derived the main regularities of plant cover, in­cluding its continuum. Acquaintance to Elenkin’s publications and, furthermore, conversations with him, could promote formation at Ramensky of view on vegetation, different from that of the geobotanists of that time. We beleive, Ramensky’s physico-mathematical training, which he received while studying for two years at the Mining Institute, also contributed to a new view of the plant cover. Thus, it can be assumed that a set of factors helped the second-year student of St. Petersburg University, with the only field season, to formulated a revolutionary idea that was not immediately accepted by phytocenologists, and in general by biologists. The first expedition determined the objects of Ramensky’s research for a long time. Komarov appreciated his and Savich’s work and took them in next 1908 to Kamchatka, wh ere Ramensky continued the swamp and lake vegetation studying. In 1909–1911 he studi­ed the water and coastal-aquatic vegetation of the St. Petersburg province and the neighboring Olonets one. Ramensky quickly became so authoritative expert in the field of studying of this vegetation that in 1909 he was involved in development of the all-Russian “Program for botanical-geographical researches”, for which he wrote the chapter “Water and coastal vegetation”. When in 1911 Ramensky was invited to Voronezh province for “natural historical research”, he began his activity with the study of lake and swamp vegetation, gradually passing to the research of mea­dows. Later, Ramensky studied various types of vegetation. Nevertheless, the phytocoenoseses of hydromorphic landscapes, which he has faced in his first expedition, were forever the most interesting to him.


Author(s):  
Ye.Ye. Nikitin

The current situation in the sphere of district heating is analysed on the basis of use of the cognitive approach. The presence of closed chains of cause-effect relationships of negative factors and conflicts of target settings of the subjects in the field of district heating is shown. The conceptual model of energy efficient modernization of district heating systems is proposed. This model includes indicators of the current status of heat sources, networks and heat consumers, energetic and economic models, restrictions, procedure of forming and analysis of the mutual influence of the recommended projects. The quantitative data on indicators of the current state of district heating systems of the cities of Ukraine are presented. The interrelation between indicators of the current state and projects of energy efficient modernization of district heating systems is shown. Assessment of energy self-sufficiency of municipal district heating systems on condition of thermal modernization of buildings is carried out. The creation of energy management systems at the district heating enterprises is proposed. Bib. 6, Fig. 7, Tab. 5.


2019 ◽  
Vol 26 (6) ◽  
pp. 319-324
Author(s):  
Victor K. Uteshev ◽  
Edith N. Gakhova ◽  
Ludmila I. Kramarova ◽  
Natalia V. Shishova ◽  
Svetlana A. Kaurova ◽  
...  

In modern biology, a search for efficient and safe ways of long-term storage of animal genomes is vital for the survival of rare and endangered species. To date, the only reliable method of prolonging the preservation of genome is deep freezing of somatic and reproductive cells, including spermatozoa. Here we overview the current state of reproductive technologies and present the cryopresevation strategies of genetic material of selected amphibian species. These strategies were developed at the Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia. Cryopreservation could help managing the threatened populations of amphibian species through genome storage and mediate the production of healthy animals from the stored material.


2015 ◽  
pp. 26-37
Author(s):  
V. B. Golub ◽  
V. V. Bondareva ◽  
A. N. Sorokin ◽  
L. F. Nikolaychuk

Plant communities with reed domination (Phragmites australis agg.) occupy the large areas in the Lower Volga Valley and especially in the river delta. We have set the task to reveal the diversity of these communities in the Lower Volga Valley. For this purpose, we applied the database that is registered in the Global Index of Vegetation-Plot Databases (GIVD) under the EU-RU–002 index (http://www.givd.info/) and includes 14871 relevés made during the period from 1924 to 2013. Communities with the dominance of reed were defined as such, if the coverage of this plant was more than 50 %. We have found 375 such relevés in the database. At first, one basal community, 3 associations and 3 subassociations with domination of Phragmites australis agg. were distinguished in the Lower Volga Valley. All processing and analysis of relevés were performed using the software package JUICE 7.0. (Tichý, 2002). The «Cocktail» method was applied to establish the sociological groups that indicate environmental conditions (Bruelheide, 2000). The expert system for selection from the database of relevés by means of these groups was created. It is allowed us to ascribe relevés to earlier distinguished associations, subassociations and basal community. 171 relevés have been identified by the expert system and they were assigned to association, subassociation or the basal community. 204 relevés were not referred to any association, subassociation or the basal community. We wanted to answer the question: are there among these 204 relevés, which could be interpreted as the new syntaxa, giving them the proper ecological characteristics? For this purpose, the cluster analysis of 204 relevés has been carried out. The optimal level of clustering was determined by calculating the index of “crispness of classification” (Botta-Dukát et al., 2005). The greatest “crispness of classification” was reached at allocation of 13 clusters. Consideration of the floristic composition of allocated groups had shown that 11 of them were the transitional plant communities among the earlier established syntaxa. Only two clusters were differed in rather original structure that we could explain by the influence of environment factors. We have identified them as new associations Rubio tataricae-Phragmitetum australis and Cynancho acuti-Phragmitetum australis. All associations with the dominance of Phragmites australis agg. distinguished in the Lower Volga Valley were included in the alliance Phragmition communis Koch 1926, order Phragmitetalia communis Koch 1926. In literary sources from the ecological point of view these syntaxa are defined as the wetland communities, which are closely linked to water bodies (Šumberová et al., 2011; Ermakov, 2012). However, in many cases this definition does not correspond to the ecology of plant communities with the dominance of reed in the lower reaches of the Volga River. Ecotops of these communities are flooded for up to 2–3 months in a year and then they dry out. In the autumn, the ground water level can drop to a depth of one meter (Golub et al., 2011). The plant satellites of the reed here are often mesophytic plants such as Rubus caesius, Calamagrostis epigeios, Phalaris arundinacea, Rubia tatarica, Althaea officinalis, and Rumex stenophyllus. Therefore, the inclusion of phytocoenosises with domination of the reed in the lower reaches of the Volga River in the alliance Phragmition communis is rather relative. A correct placement of these plant communities in the system of vegetation syntaxa of the arid areas can be made only if it is based on original data obtained from much bigger territory than the Lower Volga Valley. In future geobotanical studies, it is desirable to divide the aggregation of Phragmites australis agg. into smaller species taxa.


2021 ◽  
pp. 204589402110407
Author(s):  
Andrew J Sweatt ◽  
Raju Reddy ◽  
Farbod Rahaghi ◽  
Nadine Al-Naamani

In this conference paper, we review the 2020 American Thoracic Society (ATS) International Conference session titled, “What’s New in Pulmonary Hypertension Clinical Research: Lessons from the Best Abstracts”. This virtual mini-symposium took place on October 21, 2020, in lieu of the annual in-person ATS International Conference which was cancelled due to the COVID-19 pandemic. Seven clinical research abstracts were selected for presentation in the session, which encompassed five major themes: (1) standardizing diagnosis and management of pulmonary hypertension, (2) improving risk assessment in pulmonary arterial hypertension, (3) evaluating biomarkers of disease activity, (4) understanding metabolic dysregulation across the spectrum of pulmonary hypertension, and (5) advancing knowledge in chronic thromboembolic pulmonary hypertension. Focusing on these five thematic contexts we review the current state of knowledge, summarize presented research abstracts, appraise their significance and limitations, and then discuss relevant future directions in pulmonary hypertension clinical research.


2021 ◽  
Vol 58-4 ◽  
pp. 76-85
Author(s):  
R. I. Dzuev ◽  
A. R. Dzuev ◽  
M.A. Khashkulova ◽  
V. N. Kanukova ◽  
R. K. Sabanova

Koedoe ◽  
1997 ◽  
Vol 40 (2) ◽  
Author(s):  
C.M. Smit ◽  
G.J. Bredenkamp ◽  
N. Van Rooyen ◽  
A.E. Van Wyk ◽  
J.M. Combrinck

A vegetation survey of the Witbank Nature Reserve, comprising 847 hectares, was conducted. Phytosociological data were used to identify plant communities, as well as to determine alpha and beta diversities. Eleven plant communities were recognised, two of these are subdivided into sub- communities, resulting in 14 vegetation units. These communities represent four main vegetation types, namely grassland, woodland, wetland and disturbed vegetation. Grassland communities have the highest plant diversity and wetland vegetation the lowest. Floristic composition indicates that the vegetation of the Rocky Highveld Grassland has affinities to the grassland and savanna biomes and also to the Afromontane vegetation of the Great Escarpment. An ordination scatter diagram shows the distribution of the 14 plant communities or sub-communities along a soil moisture gradient, as well as along a soil depth/surface rock gradient. The sequence of communities along the soil moisture gradient is used for calculating beta-diversity indices. It is concluded that the relatively small size of the Witbank Nature Reserve is unlikely to have significant negative effects on the phytodiversity of the various plant communities. This nature reserve is therefore of considerable importance in conserving a representative sample of the Rocky Highveld Grassland.


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