Academia.edu no longer supports Internet Explorer.
To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser.
A comparative morphological characteristics of two North American invasive species – C. probstii and C. missouriense and the representative of genus Chenopodium in Bulgarian flora closest to them – C. album L. have been made. А total of 18 quantitative and 11 qualitative features are included in the morphological analysis. For more detailed study of generative organs the Scanning electron microscope (SEM) method has been used. Information about the chorology and ecological preferences of C. probstii and C. missouriense, possible ways of their penetration into Bulgarian flora, as well as the reasons for their later discovery have been given. Results showed that the differentiation of C. album, C. missouriense and C. probstii is possible in all phases of their development. Introduction Globalization and growth of trade relationships worldwide in recent decades have resulted in the advent of many new plant species in European countries. The representatives of Chenopodium incl. studied ...
Phytologia Balcanica International Journal of Balkan Flora and Vegetation
Chenopodium pratericola (Chenopodiaceae): a new Alien species for the Bulgarian flora2012 •
Chenopodium pratericola Rydb. is reported as a new species for the Bulgarian flora. It was discovered in two localities at the Black Sea Coast. It's chromosome number was counted as 2n = 18. Information about the species' morphology, habitats, distribution and possible pathways of its introduction in the Bulgarian flora is provided.
Environmental & Socio-economic Studies
Invasive species in the flora of the Starobilsk grass-meadow steppe (Ukraine)2015 •
The results of an investigation of the invasive species in the flora of the Starobilsk grass-meadow steppe are presented. Check-list of alien plant has over 386 species of vascular plants of which 28 species are invasive. We have identified 6 transformer species from the invasive plants. We aggregate data on the entry, distribution history, ecology, occurrence in different plant communities, degree of their naturalization and the habitats where they occur. The leading families of invasive species are: Asteraceae. The basis for this group is presented by origin from the North America and the Mediterranean. With respect to the time of immigration, most of them are kenophytes. By the method of introduction, ksenophytes are dominated; according to the degree of naturalization epoecophytes and agriophytes dominate in this group. With regard to the characteristics of life forms, half of invasive species are terophytes. The vast majority of plants are heliophytes and xeromesophytes. Most s...
Biodiversity: Research and Conservation
Invasive alien plant species of the southern part of the Nowogard Plain (NW Poland)2011 •
Environmental & Socio-economic Studies
Invasive alien plants in Poland – the state of research and the use of the results in practice2021 •
The participation of species of alien origin in the flora of individual regions of the world is increasing. A large proportion of these species pose a threat to biodiversity. Issues of the dynamics of changes in the flora and the scale and pace of the processes, with particular emphasis on the biology, ecology, chorology, and genetic variability of the populations of plants of alien origin, including those alien species which are invasive, have been the subject of many years of research in this field in Poland. The present study is an overview of the state of research on invasive plant species in Poland, including the main results of the basic and applied research which have provided the basis for (i) the preparation of a list of invasive plant species for Poland; (ii) assessing the degree of invasiveness of the species analysed, in accordance with the adoption of criteria and the development of methodological solutions. In this work, a new version of the list of invasive plant spec...
2007 •
The main goal of this study is to present a diversity of invasive plants occurring in the south-western part of the Silesian Upland and to estimate their impact on transformation of the native plant cover. Among 101 species considered to be invasive, three groups were distinguished: Ñnot harmfulî (46 species), Ñweedsî (32) and Ñtransformersî (23). Subsequently, their characteristics is given (origin, geographical-historical groups, life forms, frequency of occurrence) and they are briefly compared. Special attention is paid to the species included in the Ñtransformersî group which enter natural and semi-natural habitats and transform the native plant cover to the largest extent. It has been determined that these are usually large perennial plants or trees, of predominantly North American origin, with numerous localities in which they often form compact patches occupying large areas.
2010 •
ABSTRACT This paper describes the reproductive characteristics of 93 neophytes (alien species introduced after 1500 A.D.) of the flora of the Czech Republic and compares trait values between naturalized inva-sive and naturalized non-invasive neophytes. Species were sampled and seed collected in the field from multiple localities in the Czech Republic. Traits related to seed production (propagule number per plant and per population), dispersal (propagule size, length/width ratio and weight; buoyancy; epizoochory; terminal velocity) and establishment (germination; seedling relative growth rate; seedling establishment) were measured for each species either in the field, in a common garden experiment or in the laboratory. Invasive species significantly differ from naturalized non-invasive species in propagule length/width ratio (by having lower ratio, i.e. more rounded propagules) and fecundity (invasive species are more fecund, both per individual plant and in terms of the population propagule production). Invasive species have proportionally fewer seedlings establishing in the autumn and better capacity for dispersal by wind than non-invasive species. The results for several traits differ depending on whether or not the effect of phylogeny is included in analytical models. Considering species relatedness expressed as a taxonomic hierarchy, invasive species have lighter propagules and higher population propagule numbers, and marginally significantly differ in produc-ing more propagules per plant and having higher capacity for dispersal by water. We found that most variation in invasiveness is linked to variation among species within genera. This distribution of relatedness means that predictions of whether a species will become invasive cannot be based on traits of the relatives of the given species at higher taxonomic levels. The distinction made in this paper, i.e. invasive species vs. naturalized but non-invasive species, can potentially contribute to a deeper understanding of the role of traits associated with invasiveness because the crucial transi-tion from the naturalized to invasion stage is rarely addressed in invasion ecology.
(2017). Assessment and prediction of the invasiveness of some alien plants in conditions of climate change in the steppe Dnieper region. The flora of the steppe Dnieper region is characterized by an abundance of naturalized alien species, some of which colonised over the last decade. Climate change, associated primarily with increasing temperature, became clearly manifested in this period. We tested the hypothesis that there is an association between climate change and the initiation of invasiveness of some alien plant species in the steppe Dnieper region. For this purpose, comparative studies of the distribution boundaries of naturalized alien trees, shrubs and herbaceous plants were conducted. Along the research route numerous 5–10-year-old broadleaf linden trees (Tilia platyphyllos Scop.) were found in the man-made plantation communities of Dnipro city in areas with moist soil; seeded undergrowth was located at a significant distance from the adult linden plants. Numerous groups of young 7–10-year-old plants of the smoke trees (Cotinus coggygria Scop.), which had a seed origin, were found in the shelterbelt and urban recreational plantations. Young 10–12-year-old virginal and generative plants of the black cherry (Padus serotina Ehrh.) were found in large numbers in both the semi-natural and artificial plant communities at great distances from the adult trees. The alien plant species common hackberry (Celtis occidentalis L.) showed the ability to form fairly sparse seminal seedlings, which was presented by the plants at the age of 4–7 years in both the natural and urban plant communities. The perennial herbaceous plant common milkweed (Asclepias syriaca L.) was found in the course of the research in ruderal habitats, urban plant communities, and also in the agrocoenoses. The common milkweed reached its greatest abundance in fields of winter crops, where the spread of this species was accompanied by a sharp decrease in the number of other species of segetal plants. Our study results confirm that the extension of the distribution boundaries of alien species over the last decade was not related to the ground conditions of the steppe Dnieper region. At the same time, changes in climatic conditions were favourable for some naturalized alien species because they have created the opportunity for seed reproduction of species away from the maternal plants. Alien species C. coggigria, P. serotina and A. syriaca were also the most sensitive to the influence of the climate changes. Consequently, these species have the greatest potential for increasing their level of invasiveness and endangering the biodiversity in the steppe Dnieper region under conditions of climate change. We suggest that a simultaneous initiation of invasiveness of these several alien species leads to an increase in the degree of threat to the diversity of natural plants in the region. The study results confirm the urgent need for analysis and forecasting of the consequences of introduction of alien species, in order to prevent the undesirable effects that this would bring for the region's native vegetation.
Arteriosclerosis, Thrombosis, and Vascular Biology
Inhibition of Bone Morphogenetic Protein Signaling Reduces Vascular Calcification and Atherosclerosis2012 •
Quarterly Journal of Research and Planning in Higher Education
Presenting a Model for Public Universities Funding in Iran2011 •
European Safety Dependability Conference (ESREL2001)
Comparison of methodologies for the safety and dependability assessment of an industrial programmable logic controller2001 •
2022 •
Annals of Eye Science
AB031. Switching to aflibercept in diabetic macular edema not responding to bevacizumab in a Canadian real-life setting2018 •
2022 •
Divan Edebiyatı Araştırmaları Dergisi
İbnülemin'in Divan Neşirleri2010 •
Revista de Derecho Comunitario Europeo
La insuficiente regulación de los acuerdos pesqueros durmientes en el Reglamento (UE) 2017/2403 sobre la gestión sostenible de las flotas exteriores2018 •
Multiple sclerosis and related disorders
Autonomic symptom burden is associated with MS-related fatigue and quality of life2015 •
Techniques in Foot & Ankle Surgery
The Addition of an “Internal Brace” to Augment the Broström Technique for Lateral Ankle Ligament Instability2016 •
Brazilian Journal of Physics
Molecular motions in thermotropic liquid crystals studied by NMR spin-lattice relaxation1998 •
Visión Gerencial
Competencias emocionales y burnout en empleados de tecnología de información en el contexto venezolano2010 •
Management and Organization Review
Secondary Business Model Innovation in Emerging Economies2021 •
Jurnal Wira Ekonomi Mikroskil
Modal Kerja, Perputaran Piutang, Persediaan dan Penjualan Terhadap Laba BersihAthenea Digital. Revista de pensamiento e investigación social
A multi-method proposal to study the Public Space in the Scale of Neighborhood from a Transactional Approach2012 •
arXiv (Cornell University)
Dynamic Scaling for First-order Phase Transtions2000 •
arXiv (Cornell University)
SDN Flow Entry Management Using Reinforcement Learning2018 •
Nucleation and Atmospheric Aerosols
Examination of rotor excavator ropes for environmental safety workers in the coalmines of Kosovo2022 •
1998 •
Healthcare
Pre-Pandemic Dietary Assessment of Elderly Persons Residing in Nursing Homes—Silesia (Poland)2022 •
Neli Grozeva