Contribution to the Macrochelidae Vitzthum, 1930 fauna of the Carpathian Basin and the Balkan Peninsula (Acari: Mesostigmata)

From different localities of the Balkan Peninsula and the Carpathian Basin altogether 19 macrochelid mite species are listed belonging to the genera Geholaspis Berlese, 1918 (three species), Glyptholaspis Filipponi et Pegazzano, 1960 (one species), Longicheles Valle, 1953 (four species), Macrholaspis Oudemans, 1931 (one species), Macrocheles Latreille, 1829 (five species), Neopodocinum Oudemans, 1902 (two species) and Nothrholaspis Berlese, 1918 (three species). New country occurrences are also given for Croatia (three species), Hungary (three species), Macedonia (five species) Romania (five species) and Serbia (seven species)

Sampling strategies for phytoplankton investigations in a large river (River Danube, Hungary)

The results of phytoplankton studies ont he Hungarian stretch of the Danube are analysed with the focus on questions of a sampling frequency. Phytoplankton samples were taken weekly upstream and downstream of Budapest during a long-term project. Six short-term periods were investigated more intensively, with 4-8 samples/day over a 2-4 day period. The qualitative composition of phytoplankton samples were investigated. It is suggested that the sampling frequency should vary during the year in a large eutrophic river like the Danube. It is important to have up-to-date details of water discharge, too. There is a need to know both the present water discharge and the pattern of probable changes int he near future, using forecasts of the water discharge registration service. In mid-winter the sampling frequency can be monthly. Int he adjacent cool seasons, in February-March and in November, sampling shoud be at a 2-3 week frequency. From April to October the frequency can be biweekly in high water periods (during the floods), but we recommend sampling every 7-10 days under low flow conditions. A special „time average” sampling-method is useful int he low water period

New data to the mite fauna of Hungarian bamboo plantations

Five different bamboo plantations were investigated on the basis of the leaf litter inhabiting mites. 11 Mesostigmata and 10 Oribatida are listed from the leaf litters, of which three species, e.g. Vulgarogamasus kraepelini (Berlese, 1905), Nothrus parvus Sitnikova, 1975, Metabelba paravulverosa Moritz, 1966 are new to the Hungarian fauna

Distribution of periphytic diatoms in the rivers of the Lake Ladoga basin (Northwestern Russia).

Relationships between distribution of periphytic diatoms and environmental variables in 19 rivers of the Lake Ladoga basin (Northwestern Russia) were examined using gradient analysis. On the basis of geology and river water chemistry, the Lake Ladoga basin could be separated into twomain parts, the northern and the southern sub-basin. The rivers in the northern sub-basin are slightly acidic and low in conductivity (mean value 53 mS cm–1); the rivers in the southern sub-basin have neutral to slightly alkaline waters with higher conductivities (mean value 168 mS cm–1). A detrended correspondence analysis (DCA)defined two groups of rivers generally corresponding to the two main parts of the Lake Ladoga basin. Fragilaria capucina var. rumpens, Frustulia saxonica and Tabellaria flocculosa were the typical species for the northern sub-basin, whereas Cocconeis placentula var. euglypta, Ulnaria ulna and Gomphonema parvulum were characteristic species for the southern sub-basin. A canonical correspondence analysis (CCA) identified conductivity, pH, bicarbonate, total phosphorus and water colour as the most important environmental variables related to changes in assemblage structure. Both DCA and CCA ordination showed that conductivity related to geology was the most important variable,while concentration of total phosphorus was the second most important variable.Weighted averaging was used to infer total phosphorus from relative biomass of diatoms. The predictive ability of the inference model was sufficiently strong with r2 = 0.71 and RMSEP = 1.9 mg L–1. These results strongly support the use of a diatom-based inference phosphorus model for indicating eutrophication in the rivers of the Lake Ladoga basin

Computing all possible graph structures describing linearly conjugate realizations of kinetic systems

In this paper an algorithm is given to determine all possible structurally different linearly conjugate realizations of a given kinetic polynomial system. The solution is based on the iterative search for constrained dense realizations using linear programming. Since there might exist exponentially many different reaction graph structures, we cannot expect to have a polynomial-time algorithm, but we can organize the computation in such a way that polynomial time is elapsed between displaying any two consecutive realizations. The correctness of the algorithm is proved, and possibilities of a parallel implementation are discussed. The operation of the method is shown on two illustrative examples

Comparative algological and bacteriological examinations on biofilms developed on different substrata in a shallow soda lake

According to the European Water Framework Directives, benthic diatoms of lakes are a tool for ecological status assessment. In this study, we followed an integrative sample analysis approach, in order to find an appropriate substratum for the water qualification-oriented biomonitoring of a shallow soda lake, Lake Velencei. Six types of substrata (five artificial and one natural), i.e., andesite, granite, polycarbonate, old reed stems, Plexiglass discs and green reed, were sampled in May and in November. We analysed total alga and diatom composition, chlorophyll a content of the periphyton, surface tension and roughness of the substrata and carbon source utilisation of microbial communities. Water quality index was calculated based on diatom composition. Moreover, using a novel statistical tool, a self-organising map, we related algal composition to substratum types. Biofilms on plastic substrates deviated to a great extent from the stone and reed substrata, with regard to the parameters measured, whereas the biofilms developing on reed and stone substrata were quite similar. We conclude that for water quality monitoring purposes, sampling from green reed during springtime is not recommended, since this is the colonization time of periphyton on the newly growing reed, but it may be appropriate from the second half of the vegetation period. Stone and artificially placed old reed substrata may be appropriate for biomonitoring of shallow soda lakes in both spring and autumn since they showed in both seasons similar results regarding all measured features

A korai kezdetu ujszulottkori B csoportu Streptococcus-szepszis megelozesenek helyzete Magyarorszagon 2012-ben. Egy orszagos felmeres adatai.

Introduction: At present, there is no obligatory guideline for the prevention of early-onset neonatal group B streptococcal disease in Hungary. Aim: The aim of the present study was to gain insight into the spontaneously developed preventive strategy of the domestic obstetric divisions and departments in Hungary. Method: Standardized questionnaire was sent out to each of the 71 obstetric divisions and departments in Hungary. Results: Overall, 20 (27.4%) of the chairpersons replied, and thus, 39.9% of the total number of live births in Hungary were included in the study. Despite missing public health guidelines, each of the divisions and departments developed their own strategy to prevent neonatal group B streptococcal disease. In 95% of cases, bacterial culture of the lower vagina was the method of identifying pregnant women at risk. In 5% of the cases intrapartum antibiotic prophylaxis was based on risk assessment only. Of the departments using culture-based prophylaxis, 58% departments sampled women after completion of 36th gestational weeks. Antibiotic of choice was penicillin or ampicillin in 100% of cases. Of the study participants, 80% reported on multiple administration of colonized pregnant women after onset of labor or rupture of the membranes. Conclusions: The authors concluded that the rate of participation in the study was low. However, prevention of early-onset neonatal group B streptococcal infection is a priority of obstetric care in Hungary. Lack of a nation-wide public health policy did not prevent obstetric institutions in this country to develop their own prevention strategy. In the majority of cases and institutions, the policy is consistent with the widely accepted international standards. Orv. Hetil., 2014, 155(29), 1167-1172

Diatom composition of the rheoplankton in a rhithral river system

Diatom composition of the rheoplankton (phytoplankton) in the Sajó- Hernád river system (Slovakia and Hungary) was studied. Forty two sample sites were designated on the watershed from source to mouth of the two rivers and their tributaries. Samples were taken in July 2012. Altogether, 258 diatom taxa were identified. The microflora was dominated by tychoplanktonic elements. According to the relative abundance of the occurring taxa, four groups could be distinguished. Differentiation of these groups was confirmed by differences in the habitat characteristics, viz. altitude, width of watercourse, macrophyte coverage and river bed material. Diversity of diatom taxa in the phytoplankton was also studied. A positive relationship was found between the macrophyte coverage and the Simpson and the Shannon indices. In contrast, a negative relationship was shown between the macrophyte coverage and Berger-Parker diversity, in which metric the role of the dominant taxa is emphasized. Although the phytoplankton in rhithral rivers is influenced by stochastic events, our results reveal that geographical and hydromorphological characteristics of the rivers and coverage of macrophytes can also play role in shaping the composition and diversity of the phytoplankton