»Natura Croatica« – Bibliografija 1992–2001

Contents of volumes 1 - 10 Author\u27s index Key wordsSadržaji volumena 1 - 10 Indeks autora Predmetno kazal

Prilog poznavanju rasprostranjenosti vrste Damasonium polyspermum Coss. (Alismataceae) u Hrvatskoj

Damasonium polyspermum Coss. occurs only in the Mediterranean, and is relatively rare across the whole distributional range. It grows in shallow standing water bodies with significant fluctuations of the water level, and it is considered characteristic for Mediterranean temporary ponds, which are rare and endangered habitats. According to IUCN, D. polyspermum is globally vulnerable (VU). In Croatia this species is denoted as data deficient (DD), however, more recently it was proposed to category endangered (EN), to critically endangered (CR). Until this record, there were only two known localities of D. polyspermum in Croatia, both in Northern Dalmatia. In June 2014 we have discovered a new locality of D. polyspermum in the area of Vrana Lake in Northern Dalmatia. Due to the specific ecological requirements which account for the small number of findings, new localities of D. polyspermum represent a significant contribution to the knowledge on its distribution.Vrsta Damasonium polyspermum Coss. rasprostranjena je isključivo u Mediteranu, s relativno rijetkom pojavnošću u čitavom arealu. Uspijeva u plitkim, slatkovodnim stajaćicama kod kojih dolazi do značajne fluktuacije razine vode, te se smatra karakterističnom vrstom za mediteranske povremene lokve, rijetka i ugrožena staništa. Ova vrsta je globalno procijenjena kao osjetljiva (VU), dok za nacionalnu procjenu prilikom izrade aktualne Crvene knjige nije bilo dovoljno podataka, pa je vrsta označena kao nedovoljno poznata (DD). Ipak, novija razmatranja ukazuju na to da je vrsta ugrožena (EN) do kritično ugrožena (CR). U Hrvatskoj je do sada zabilježena na svega dva lokaliteta u sjevernoj Dalmaciji. U lipnju 2014. pronašli smo novo nalazište ove vrste, na području Vranskog jezera u sjevernoj Dalmaciji. Zbog vrlo specifičnih ekoloških zahtjeva, koji su odgovorni za mali broj nalaza ove vrste, novi nalazi predstavljaju značajan doprinos poznavanju rasprostranjenosti ove vrste

Prilog poznavanju rasprostranjenosti vrste Damasonium polyspermum Coss. (Alismataceae) u Hrvatskoj

Damasonium polyspermum Coss. occurs only in the Mediterranean, and is relatively rare across the whole distributional range. It grows in shallow standing water bodies with significant fluctuations of the water level, and it is considered characteristic for Mediterranean temporary ponds, which are rare and endangered habitats. According to IUCN, D. polyspermum is globally vulnerable (VU). In Croatia this species is denoted as data deficient (DD), however, more recently it was proposed to category endangered (EN), to critically endangered (CR). Until this record, there were only two known localities of D. polyspermum in Croatia, both in Northern Dalmatia. In June 2014 we have discovered a new locality of D. polyspermum in the area of Vrana Lake in Northern Dalmatia. Due to the specific ecological requirements which account for the small number of findings, new localities of D. polyspermum represent a significant contribution to the knowledge on its distribution.Vrsta Damasonium polyspermum Coss. rasprostranjena je isključivo u Mediteranu, s relativno rijetkom pojavnošću u čitavom arealu. Uspijeva u plitkim, slatkovodnim stajaćicama kod kojih dolazi do značajne fluktuacije razine vode, te se smatra karakterističnom vrstom za mediteranske povremene lokve, rijetka i ugrožena staništa. Ova vrsta je globalno procijenjena kao osjetljiva (VU), dok za nacionalnu procjenu prilikom izrade aktualne Crvene knjige nije bilo dovoljno podataka, pa je vrsta označena kao nedovoljno poznata (DD). Ipak, novija razmatranja ukazuju na to da je vrsta ugrožena (EN) do kritično ugrožena (CR). U Hrvatskoj je do sada zabilježena na svega dva lokaliteta u sjevernoj Dalmaciji. U lipnju 2014. pronašli smo novo nalazište ove vrste, na području Vranskog jezera u sjevernoj Dalmaciji. Zbog vrlo specifičnih ekoloških zahtjeva, koji su odgovorni za mali broj nalaza ove vrste, novi nalazi predstavljaju značajan doprinos poznavanju rasprostranjenosti ove vrste

Alternating Copolymers of beta-Alkoxystyrenes and N-Phenylmaleimide

Alternating copolymers of beta-alkoxystyrenes (I) and N phenylmaleimide (NPMI) were prepared by free-radical initiated polymerization in bulk or in toluene as solvent. The equilibrium constants of I (R = Et and sec-Bu) and NPMI were determined by the transformed Benessi-Hildebrand NMR method in CDC13, and it was found that the bulkiness of alkyl group has no significant influence on the equilibrium constants. The rate of copolymerization, howe ver, was largely dependent on the bulkiness of alkyl group, and rate constants decreased by increasing the size of alkyl group. It was further found that the weight loss in the thermo-gravimetric analysis increases by the increase of bulkiness of alkyl group in e1ectron donor monomer. The linear correlation between the logarithm of rate constants of kM, over k:« against Taft-Hancock steric constants and the parallelism between weightlos s values in thermograms and steric factors of respective alkyl groups indicate that the rate of copolymerization and thermal degradation are sterically controlled processes

Australian acacias across eastern Adriatic – abundant but not aggressive

Background and Purpose: Biological invasions are considered among the main factors of global changes and the identification of future invaders may help in taking effective steps to prevent their dispersal and/or establishment. For some Australian Acacia species, especially Acacia dealbata Link, an invasive status has been already described in some European countries. The aim of this work was surveying the actual spatial pattern of Australian acacias across the eastern Adriatic, and, by applying GIS techniques, to learn more about their ecology and distribution. Materials and Methods: We carried on two field surveys during the flowering season of the year 2014, and recorded the locations of Acacia species, their flowering state, floral characteristics, and the insects present on the inflorescences. We georeferenced any plant detected, and collected soils samples under the plant crowns and in close natural or semi-natural areas. Results and Conclusions: Very few species were recorded and mostly in private gardens, A. dealbata being the preferred ornamental. Records referring to plants grown in abandoned or unattended gardens demonstrate the potential of this species to expand if not properly controlled. In addition, we detected no plants outside gardens in natural habitats. Results on soil characteristics, with higher pH values than those usually found under trees of this genus elsewhere, may partly explain our findings. The surveys took place during a spring following an unusually warm winter: this may have influenced both phenology and pollinator activity, finally reducing observations of the latter. Descriptive statistics and MaxEnt analysis have shown the importance of the warmer areas in determining the presence of Acacia species. At present, acacias are not to be considered aggressive invaders along the eastern Adriatic according to our observations; they can be classified as alien, with a local trend toward becoming casual

HOW CAN SMALL-SCALE EVENTS CONTRIBUTE to the TOURISM PROGRESS of AN UNDEVELOPED BORDER AREA? LESSON from EASTERN SERBIA

The study analyses the role and impact of the event "Danube Fair" (Eastern Serbia) in the tourism progress of the less-advantaged border area. The aim of this paper is to emphasize the significance of the role of events in the tourism development of rural settings and the attraction of domestic and foreign visitors with the specific offer of this part of Serbia. The tourism valorization of the event “Danube Fair” was done according to the geographical and economic criteria, and it was determined that it belongs to the category of regional events. In the paper, special attention was paid to the analysis of tourists’ satisfaction with this event as a geographical criterion, especially in dependence with the visitors’ origin, since it is what the positioning of an event on the tourism market depends on, both on the local and on the international level. “Danube Fair” presents the example of a relatively small-scale event, which can become a basis of tourism growth, with proper valorization and affirmation of local products and services, and their introduction to the international tourism market. © 2020 Editura Universitatii din Oradea. All rights reserved.17-22-07001-ОГНAuthors would like to thank Russian Foundation for basic research for the financial support provided within the project No. 17-22-07001-ОГН (Complex algorithm for cultural regeneration of minor industrial cities within the context of agglomeration processes in Russia and Europe)

Tourism as an Approach to Sustainable Rural Development in Post-Socialist Countries: A Comparative Study of Serbia and Slovenia

The research deals with the sustainable development of the Serbian and Slovenian countryside, under the influence of tourism progress. The article identifies the main rural tourism competitiveness in Serbia and Slovenia, as one of the essential factors of rural development in both countries, analyzing the main contributions and making a series of proposals to guide the future research agenda. The aim of the paper is to clarify around one obviously defined objective—to point out the competitiveness of sustainable rural tourism in typical post-socialist settings. The data for this study were collected using the Integrated Model of Destination Competitiveness to observe Serbian and Slovenian competitiveness in tourism. Determinants were assessed using a survey evaluating four demanding factors and 20 supporting factors, based upon a five-point Likert Scale. The results indicated that the friendliness of residents towards visitors, easy communication between them, together with quality of infrastructure and health facilities show the highest level of statistical correlation. These are the main propositions to start an initiative for the authorities in local communities to actively participate in sustainable rural development. The findings provide tourism stakeholders with relevant respondents’ perceptions pertaining to the tourism development in non-urban areas

Optimum virtual environment for solving cognitive tasks by individuals with autism spectrum disorders: The questions and methods of design

The number of people with autism spectrum disorders (ASDs) is growing in Russia and the world at large. It is important to find ways to diagnose and correct the work with such individuals. There is much evidence that children with ASDs often exhibit pronounced communicative difficulties, problems in establishing visual contact etc. Specialists working with this category of patients face serious difficulties in trying to find effective ways to interact with them. The use of virtual reality environments that have the necessary parameters, determined theoretically, experimentally, and practically, can mitigate these difficulties. The study has shown that, at present, there is much experience in the field of virtual reality application while working with children who have ASDs. Nevertheless, there are several unspecified issues. First, as far as the perception of virtual reality by people with ASDs are concerned, it is especially important to study them. Of much importance are the peculiarities of their states associated with virtual reality, while solving cognitive tasks during diagnostic and corrective work stage, as well as in obtaining education. It is necessary to choose the right methods of visualization and interaction in a virtual environment. The focal point of the article is to justify the project of creating a virtual reality for the diagnosis and socialization of individuals with ASDs, i.e., its structure, stages and methods. In addition, the work is of interest in connection with the research of the phenomenon of presence in virtual reality. © 2019 IJCRSEE. All rights reserved.The work was supported by act 211 Government of the Russian Federation, contract № 02.A03.21.0006. The work was supported by RFBR

Amoxicillin Biodegradation with Bacillus subtilis and Pseudomonas aeruginosa: Characterization of Relevant Degradation Products

The widespread use of antibiotics can result in the release of a large number of residues into the environment. In order to reduce the exposure risk, considerable research has been carried out in the field of antibiotic residues. We aim to explore the possibilities of antibiotic amoxicillin biodegradation in laboratory scale by adding microbiological cultures, Pseudomonas aeruginosa (Gram-negative) and Bacillus subtilis (Gram-positive), which are a type of bacteria that are commonly found in the environment, such as in soil and water. Apart from the degradation itself, special attention was paid to the identification of antibiotic residues. The biodegradation process was investigated, revealing a 99.2 % degradation efficiency at amoxicillin concentration of 0.2 mg mL–1, and four degradation products were identified. For reaction monitoring and identification of degradation products, UHPLC and LC-MS analyses were performed. Furthermore, to provide additional evidence, the products were independently synthesized and then compared spectrometrically with the obtained biodegradation products. These results could provide new aspects to the behavior of amoxicillin, and pave the way for further monitoring and studies of its residues in the environment. This work is licensed under a Creative Commons Attribution 4.0 International License

Grime’s CSR strategies of the invasive plants in Croatia

Background and Purpose: Biological invasions are causing serious problems in the environment, often resulting in significant modifications of the landscape structure and ecosystem functioning. J.P. Grime’s theory on CSR strategies of plants indicate whether plant species is a good competitor, adapted to disturbance or to limited resources. The goal of this study was to find which CSR strategy (if any) prevails among invasive plants in Croatia. Materials and Methods: Data on CSR strategies were not available, or not consistent, for all invasive plants in Croatia, hence we have allocated CSR strategies to 15 invasive taxa, using the methodology based on several plant traits, which resulted in assignment of CSR type to 57 invasive plants. Distributional records of those 57 taxa in Croatia from the Flora Croatica Database were used to analyse the occurrence of invasive plants among three biogeographical regions (Alpine, Continental and Mediterranean). Results and Conclusions: In total, 10 CSR types were found among the invasive plants of Croatia, mostly CR-strategists, followed by C-strategists and R-strategists. The largest proportion of R-strategists was found in the Mediterranean region, while the largest proportion of C-strategists was found in the Alpine region. Out of the three main strategies, competitive ability and ruderality were found to be frequently present within the Croatian invasive flora, while stress tolerance was almost absent