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1.

001-es BibID:BIBFORM061652
Első szerző:Balogh Zsuzsanna (biológia környezettan tanár)
Cím:Effects of Anthropogenic Activities on the Elemental Concentration in Surface Sediment of Oxbows / Zsuzsanna Balogh, Sándor Harangi, János Tamás Kundrát, István Gyulai, Béla Tóthmérész, Edina Simon
Dátum:2016
ISSN:0049-6979 1573-2932
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Water Air And Soil Pollution. - 227 : 13 (2016), p. [8]. -
További szerzők:Harangi Sándor (1987-) (vegyész) Kundrát János Tamás (1984-) (biológus-ökológus) Gyulai István (1980-) (biológus) Tóthmérész Béla (1960-) (ökológus) Simon Edina (1981-) (ökológus)
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2.

001-es BibID:BIBFORM078569
035-os BibID:(cikkazonosító)929 (Wos)000472680400059 (Scopus)85066328449
Első szerző:Berta Csaba (hidrobiológus)
Cím:Community Response of Cladocera to Trophic Stress by Biomanipulation in a Shallow Oxbow Lake / Csaba Berta, Béla Tóthmérész, Marta Wojewódka, Olga Augustyniuk, János Korponai, Boglárka Bertalan-Balázs, Alex Sándor Nagy, István Grigorszky, István Gyulai
Dátum:2019
ISSN:2073-4441
Megjegyzések:Studying contemporary and subfossil Cladocera (Crustacea) communities, we explored the effect of top-down stressors on the cladoceran communities; we are also interested in the coherence of the contemporary and subfossil communities. The studied Cibakháza oxbow lake is in E Hungary, on the left-floodplain of the River Tisza; it is a large, long, and shallow oxbow lake. Three areas of the oxbow lake were distinguished based on the strength of top-down stress: protected area with low top-down stress, biomanipulated area with high top-down stress, and recreational area with moderate top-down stress. Altogether, we identified 28 taxa in the contemporary and subfossil communities in the oxbow lake. We found that the species number of the contemporary Cladocera communities was lower (protected area: 13; biomanipulated area: 9, and recreational area: 14) than in the subfossil communities (protected area: 20; biomanipulated area: 16, and recreational area: 14). Among the environmental variables, we observed differences between the protected and biomanipulated area, while the recreational area showed a transition. Species number, abundances, and Simpson diversity also showed the effect of the fish introduction. There were no differences in beta-diversity among the contemporary and subfossil Cladocera community. The non-metric multidimensional scaling (NMDS) ordination showed that the biomanipulated area in the case of the contemporary communities was separated from the other areas, while in the case of the subfossil communities, there was no separation according to top-down stress. Our results showed that the number of species of contemporary Cladocera communities was lower in each area (3-10; 3-9; 5-9) compared to the subfossil communities (6-17; 7-12; 8-12). However, the highest abundances were found in the biomanipulated area due to the appearance of small-sized Cladocera species. Our findings suggest that the effect of a short-time fish introduction is restorable when the oxbow lake has a protected part.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
zooplankton
diversity
biomanipulation
nature protection
anthropogenic impacts
restoration
Megjelenés:Water. - 11 : 5 (2019), p. 929-942. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Wojewódka, Marta Augustyniuk, Olga Korponai János (1964-) (biológus) Balázs Boglárka (1985-) (geográfus) Nagy Sándor Alex (1956-) (hidrobiológus) Grigorszky István (1967-) (biológus-ökológus) Gyulai István (1980-) (biológus)
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3.

001-es BibID:BIBFORM082389
035-os BibID:(cikkazonosító)2527 (Wos)000507378600100 (Scopus)85085000484
Első szerző:Figler Aida (okleveles hidrobiológus)
Cím:Salt Tolerance and Desalination Abilities of Nine Common Green Microalgae Isolates / Figler Aida, B-Béres Viktória, Dobronoki Dalma, Márton Kamilla, Nagy Sándor Alex, Bácsi István
Dátum:2019
ISSN:2073-4441
Megjegyzések:Abstract: In recent years, decline of freshwater resources has been recognized as one of the main environmental problems on global level. In addition to the increasing extent of primary salinization due to climate change, secondary salinization caused by human interventions is also a significantly increasing problem, therefore, the development of various chemical-free, biological desalination and removal procedures will become increasingly important. In the present study, the salinity tolerance, salinity, and nutrient reducing ability of nine common freshwater microalgae species from the genera Chlorella, Chlorococcum, Desmodesmus, Scenedesmus, and Monoraphidium were investigated. Our results proved that the studied green microalgae species are halotolerant ones, which are able to proliferate in environments with high salt concentrations. Furthermore, most of the species were able to reduce conductivity and remove significant amounts of chloride (up to 39%) and nutrients (more than 90% nitrate). The results proved that nitrate removal of the studied species was not influenced by salt concentration, only indirectly via growth inhibition. However, the results also highlighted that N:P ratio of the medium has primarily importance in satisfactory phosphorous removal. It can be concluded that assemblages of the studied microalgae species could be able to adapt to changing conditions even of salt-rich wastewaters and improve water quality during bioremediation processes.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
green microalgae
salt tolerance
conductivity reduction
nutrient removal
Megjelenés:Water. - 11 : 12(2019), p. 1-17. -
További szerzők:B-Béres Viktória (1981-) (biológus) Dobronoki Dalma (1992-) (hidrobiológus) Márton Kamilla (1995-) (tanszéki mérnök) Nagy Sándor Alex (1956-) (hidrobiológus) Bácsi István (1977-) (biológus)
Pályázati támogatás:GINOP-2.2.1-15-2016-00029
GINOP
GINOP-2.3.2-15-2016-00019
GINOP
NKFIH-1150-6/2019
Egyéb
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4.

001-es BibID:BIBFORM080980
035-os BibID:(cikkazonosító)2002 (WoS)000495598400047 (Scopus)85073198500
Első szerző:Somlyai Imre (okleveles hidrobiológus)
Cím:Heterogeneity and Anthropogenic Impacts on a Small Lowland Stream / Imre Somlyai, Csaba Berta, Sándor Alex Nagy, György Dévai, Éva Ács, László József Szabó, János Nagy, István Grigorszky
Dátum:2019
ISSN:2073-4441
Megjegyzések:During our work, we investigated the physical and chemical variables of a small surface watercourse to investigate how different anthropogenic effects affect its water quality. Along this small watercourse, there are well-separated areas that are affected by various anthropogenic effects. In addition to its origin and branches, in many places it is surrounded by agricultural land with insufficient buffer zones, which burdens the small watercourse with nitrogen and phosphorus forms. In the lower stages, artificial damming inhibits the natural flow of the Tócó Canal, thereby creating eutrophicated stagnant water areas. This is further strengthened by, in many cases, illegal communal and used water intake that further burdens the small watercourse. Considering the experience of our investigation, it can be stated that the examined small watercourse could barely suffer human impacts, and it could be described with great heterogeneity using physical and chemical variables. We experienced that this heterogeneity caused by anthropogenic effects appeared in all hydrologic states and seasons. Furthermore, our research showed that these small watercourses had such high heterogeneity that their monitoring and examination should be taken just as seriously as when it comes to larger watercourses.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
urban water
anthropogenic impacts
land use
small lowland stream
physical-chemical variables
EU Water Framework Directive
Megjelenés:Water. - 11 : 10 (2019), p. 1-14. -
További szerzők:Berta Csaba (1991-) (hidrobiológus) Nagy Sándor Alex (1956-) (hidrobiológus) Dévai György (1942-) (ökológus) Ács Éva (1970-) (biológus, ökológus) Szabó László József (1955-) (ökológus, hidrobiológus) Nagy János (1951-) (agrármérnök, mérnök-tanár) Grigorszky István (1967-) (biológus-ökológus)
Pályázati támogatás:20428-3/2018/FEKUTSTRAT
egyéb
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5.

001-es BibID:BIBFORM004998
035-os BibID:(Scopus)58949101390 (WOS)000261849800007
Első szerző:Szilágyi F.
Cím:Application of water framework directive in Hungary: development of biological classification systems / F. Szilágyi, É. Ács, G. Borics, B. Halasi-Kovács, P. Juhász, B. Kiss, T. Kovács, Z. Müller, G. Lakatos, J. Padisák, P. Pomogyi, C. Stenger-Kovács, K. É. Szabó, E. Szalma and B. Tóthmérész
Dátum:2008
Megjegyzések:The classification according to the Water Framework Directive (WFD) includes numerous challenges in contrast with the previously applied water qualification standards. The most important element of the ecological status, the biological one, is based on five groups of living organisms: phytoplankton, phytobenthon, macrophytes, macro-invertebrates and fish. The results of a three-year research project financed by the Ministry of Environment and Water (MoEW) and the Hungarian Academy of Sciences (HAS) are reported in this work. The objective of the project was the elaboration of a proposal for biological classification according to the WFD for the related groups of living organisms. In the course of the project the biological characteristics to be measured were selected for each of the above listed groups which served as the basic data for Biological Quality Elements (BQEs). In the BQEs we estimated the type-specific reference values for most of the Hungarian surface water types. Then we created the structure of the qualification system for these groups, including specification of class boundaries between the five classes for the Environmental Quality Ratio (EQR) values on the basis of expert estimation. A Non-Taxonomic Periphyton Index (NTPI, not included in the WFD) was also developed and tested for qualification. The elaborated classification systems were tested on the basis of existing scarce data for numerous Hungarian water types.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
biological classification
biological indices
fish
periphyton
phytobenthon
phytoplankton
macro-invertebrates
macrophytes
water framework directive
Megjelenés:Water Science and Technology. - 58 : 11 (2008), p. 2117-2125. -
További szerzők:Ács Éva Borics Gábor (biológus) Halasi-Kovács Béla (1970-) (ökológus) Juhász Péter Kiss Béla Kovács T. Müller Zoltán Lakatos Gyula (1949-) (ökológus) Padisák Judit Pomogyi P. Stenger-Kovács Csilla Szabó K. É. Szalma E. Tóthmérész Béla (1960-) (ökológus)
Internet cím:elektronikus változat
elektronikus változat
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6.

001-es BibID:BIBFORM060070
Első szerző:Veres Zoltán (környezetkutató ökológus)
Cím:The efficiency of municipal wastewater treatment with the reconstructed activated sludge method / Z. Veres, J. Ditrói, G. Tóth, T. Mester, G. Lakatos
Dátum:2014
ISSN:1063-455X 1934-936X
Megjegyzések:Centralized wastewater treatment policy is a common challenge in Hungary. With the recent technology improvement of the Debrecen Wastewater Treatment Plant, the original activated sludge function system's maximum load is doubled, making it able to treat the effluents of 7 settlements total. The introduced new technical constructions however required strict attention to be successfully integrated into the existing system. Retrofitting the overall processes caused disturbances affecting certain parameters in the biological treatment, thus modifying water quality of the effluent. Our experiments had aimed to control the performance of the plant after the reconstruction during test phase for more than a year period. It has been found that a slight increase of removal efficiency was achieved in the observed parameters of COD, BOD5, TP, SS, while TN remained in a moderate degree of enhancement. Retention effectiveness has begun to escalate significantly after a year of operation.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
aktív iszap
Hatékonyságvizsgálat
próbaüzem
kémiai paraméterek
Megjelenés:Journal of Water Chemistry and Technology. - 36 : 3 (2014), p. 139-143. -
További szerzők:Ditrói J. Tóth G. Mester T. Lakatos Gyula (1949-) (ökológus)
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7.

001-es BibID:BIBFORM109709
035-os BibID:(cikkazonosító)1062 (Scopus)85152373626 (WoS)000958832100001
Első szerző:Yaqoob, Majd Muwafaq
Cím:The Impacts of Land Use and Seasonal Effects on Phytoplankton Taxa and Physical-Chemical Variables in the Tigris River within the City of Mosul / Majd Muwafaq Yaqoob, Imre Somlyai, Csaba Berta, István Bácsi, Aws N. Al-Tayawi, Kossay K. Al-Ahmady, Ramadhan Hamza Mohammed, Omar Alalami, István Grigorszky
Dátum:2023
ISSN:2073-4441
Megjegyzések:We investigated the effect of land use based on the dominant phytoplankton and physicalchemical variables in the different areas of the Tigris River, within the city of Mosul. Agricultural and urban activities have a significant impact on the water quality of the river. Regardless of physical and chemical variables, phytoplankton act as a bio-indicator of water quality due to their fast and sensitive response to changes in the environment. Our research was conducted in the Tigris River within the city of Mosul by examining the phytoplankton species and the physical-chemical variables at 16 sites during each vegetation period. Point and non-point source pollutants have affected the Tigris River within the city of Mosul, getting into the river from upstream through agricultural activities and by urban activities in the middle section of the city, respectively from both banks. Based on our results, we observed the highest phytoplankton abundance during the October sampling periods, while the lowest occurred during the July sampling period, which was associated with maximum water temperature and absence of rain. According to our study, land use (e.g., agricultural, and urban activities) greatly affected the dominant phytoplankton species and physical-chemical variables of the Tigris River. Oscillatoria sp. dominated all seasons in the agricultural region, while at the same time, we observed an increase in the number of phytoplankton species caused by the nutrient availability upstream on the river. The effects of climate have very significant and characteristic effects in this area, which basically determine the community of organisms and the water quality; the effects resulting from anthropogenic activity significantly modify this. Based on our investigation, in the part of the Tigris River connected to Mosul, we found a clear connection between the pollution caused and the effects of different land uses, through the examination of the algal community and physical-chemical variables in different periods of the year.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
biomarkers
water quality
phytoplankton
physical-chemical variables
anthropogenic activities
land use
LDA
Megjelenés:Water. - 15 : 6 (2023), p.1-17. -
További szerzők:Somlyai Imre (1978-) (okleveles hidrobiológus) Berta Csaba (1991-) (hidrobiológus) Bácsi István (1977-) (biológus) Al-Tayawi, Aws N. Al-Ahmady, Kossay K. Mohammed, Ramadhan Hamza Alalami, Omar Grigorszky István (1967-) (biológus-ökológus)
Pályázati támogatás:TKP2021-NKTA-32
NKFIH
RRF 2.3.1 21 2022 00008
NKFIH (Víztudományi és Vízbiztonsági Nemzeti Laboratórium)
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8.

001-es BibID:BIBFORM096138
035-os BibID:(cikkazonosító)2339 (Scopus)85114018366 (WoS)000694519200001
Első szerző:Yaqoob, Majd Muwafaq
Cím:Changes in algal plankton composition and physico-chemical variables in a shallow oxbow lake / Majd Mufafaq Yaqoob, Csaba Berta, László József Szabó, György Dévai, Szilárd Szabó, Sándor Alex Nagy, István Bácsi, Alexandra Simon, János Nagy, Imre Somlyai, Éva Ács, István Grigorszky
Dátum:2021
ISSN:2073-4441
Megjegyzések:In our work, we sought to answer whether we find differences among the various zones of an oxbow lake with different land uses based on physico-chemical variables and dominant algal plankton species. The two ends of the oxbow lake are bordered by settlements, and near them there are open water areas where fishing is the major utilization form. Between the two open water areas we find a protected area with a large aquatic plant coverage and two transition zones towards the open water areas. The oxbow lake receives periodic water replenishment only at one end from one of the open water areas. During summer?due to the lack of rain?the water of the oxbow lake is used for irrigation in the surrounding arable land, so the water level fluctuation can be significant in the riverbed. Our study was performed within a vegetation period of spring, early summer, mid-summer, and fall. In connection with the ecological classification of a smaller water body, studies on the physical and chemical properties of the water and the composition of the algal plankton are usually carried out in few places and relatively infrequently. The characteristics of a water body are also influenced by seasonal changes, which can be the changes in the extent of vegetation coverage, the way land is used and the possibility of water replenishment, to which the algal community usually responds with changes. Based on our study, it can be said that even in a relatively small water body, we found a large differences based on the chemical and physical properties of the water and the characteristic algal species. Open water zones, areas with large macrovegetation coverage, and the transition zones were separated from each other.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
phytoplankton
physico-chemical
oxbow lake
macrophytes
open water
PCA
Megjelenés:Water. - 13 : 17 (2021), p. 1-20. -
További szerzők:Berta Csaba (1991-) (hidrobiológus) Szabó László József (1955-) (ökológus, hidrobiológus) Dévai György (1942-) (ökológus) Szabó Szilárd (1974-) (geográfus) Nagy Sándor Alex (1956-) (hidrobiológus) Bácsi István (1977-) (biológus) Simon Alexandra Nagy János (1951-) (agrármérnök, mérnök-tanár) Somlyai Imre (1978-) (okleveles hidrobiológus) Ács Éva (1970-) (biológus, ökológus) Grigorszky István (1967-) (biológus-ökológus)
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