CCL

Összesen 5 találat.
#/oldal:
Részletezés:
Rendezés:

1.

001-es BibID:BIBFORM076955
Első szerző:Grigorszky István (biológus-ökológus)
Cím:Drivers of the Ceratium hirundinella and Microcystis aeruginosa coexistence in a drinking water reservoir / István Grigorszky, Keve Tihamér Kiss, László József Szabó, György Dévai, Sándor Alex Nagy, Imre Somlyai, Csaba Berta, Marija Gligora-Udovič, Gábor Borics, Gabriella Pór, Yaqoob Majd Muwafaq, Arber Hajredini, Uyanga Tumurtogoo, Éva Ács
Dátum:2019
ISSN:0213-8409 1989-1806
Megjegyzések:The spatial and temporal patterns of phytoplankton in relation to physical and chemical properties were studied in a drinking water reservoir - the Lázbérc Reservoir - located in north-east Hungary. The main objectives were to determine the role of the hydrologic regime in structuring algal growth and the effects of physical and chemical variables on the coexistence of a dominant species: cyanobacteria, Microcystis aeruginosa (Kützing) Kützing and an eukaryotic dinoflagellates, Ceratium hirundinella (O.F. Müller) Dujardin. The results suggest that nutrients (TP, NH4?N and NO3?N), turbidity, and the hydrologic regime play an important role in regulating the occurrence of investigated species. The rainy summer period resulting in a mixing of the water column, and the low level of nitrogen coupled with the internal release of phosphorus from the lake sediment under brief periods of anoxia promote cyanobacterial bloom. During this period, the water column was characterised by high turbidity, which created favourable conditions for developing a huge C. hirundinella biomass and the simultaneous occurrence of M. aeruginosa. This study also demonstrated - that contrary to what was previously known, deep standing waters in the temperate zone are not only dimictic (mixing twice a year during the spring and the fall), but they can also be mixed during the summer period due to continued rainfall, which equalizes the temperature in the whole water column. This can promote the occurrence of cyanobacterial and eukaryote planktonic organisms.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Microcystis aeruginosa
Ceratium hirundinella
phosphorus
seasonal variation
water management
lake-poly-mixis in temperate zone
Megjelenés:Limnetica. - 38 : 1 (2019), p. 41-53. -
További szerzők:Kiss Keve Tihamér Szabó László József (1955-) (ökológus, hidrobiológus) Dévai György (1942-) (ökológus) Nagy Sándor Alex (1956-) (hidrobiológus) Somlyai Imre (1978-) (okleveles hidrobiológus) Berta Csaba (1991-) (hidrobiológus) Gligora-Udovič, Marija Borics Gábor (biológus) Pór Gabriella Yaqoob, Majd Muwafaq Hajredini, Arber Tumurtogoo, Uyanga Ács Éva (1970-) (biológus, ökológus)
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

2.

001-es BibID:BIBFORM074265
Első szerző:Grigorszky István (biológus-ökológus)
Cím:Temperature and growth strategies as the essential factors influencing the occurrence of Stephanodiscus minutulus (Kützing) Cleve & Möller and Palatinus apiculatus (Ehrenberg) Craveiro, Calado, Daugbjerg & Moestrup / Grigorszky István, Kiss Tihamér Keve, Pór Gabriella, Dévai György, Nagy Sándor Alex, Somlyai Imre, Berta Csaba, Duleba Mónika, Trábert Zsuzsa, Ács Éva
Dátum:2017
ISSN:1863-9135
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Fundamental and Applied Limnology. - 189 : 2 (2017), p. 167-175. -
További szerzők:Kiss Tihamér Keve Pór Gabriella Dévai György (1942-) (ökológus) Nagy Sándor Alex (1956-) (hidrobiológus) Somlyai Imre (1978-) (okleveles hidrobiológus) Berta Csaba (1991-) (hidrobiológus) Duleba Mónika Trábert Zsuzsa Ács Éva (1970-) (biológus, ökológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
Borító:

3.

001-es BibID:BIBFORM117212
035-os BibID:(Scopus)85178134805 (WoS)001114385400001 (cikkazonosító)3994
Első szerző:Rusanov, Alexander G.
Cím:Quantitative Morphometric Analysis of Morphologically Similar Species of Fragilaria (Fragilariaceae, Bacillariophyta) Allows Detection of Non-Indigenous Taxa: A Case Study from Lake Ladoga (North of European Russia) / Alexander G. Rusanov, Maria A. Gololobova, Mikhail Y. Kolobov, Mónika Duleba, Anton A. Georgiev, István Grigorszky, Keve T. Kiss, Éva Ács, Imre Somlyai
Dátum:2023
ISSN:2073-4441
Megjegyzések:In Lake Ladoga (northwestern Russia), we found a diatom, putatively Fragilaria sublanceolatabaikali, an endemic species from Lake Baikal (southeastern Siberia, Russia). To determine whether this population matches a previously recognized species from Lake Baikal and assess how it differs from other similar Fragilaria taxa, we studied the valve morphology of three morphologically similar Fragilaria populations (the putative F. sublanceolata-baikali, F. pectinalis and F. perminuta) sampled in Lake Ladoga, along with a population of F. sublanceolata-baikali sampled in Lake Baikal. We used light and scanning electron microscopy with a combination of traditional and geometric morphometric methods. To analyze covariation between the valve shape and size (i.e., allometry), we examined differences in the ontogenetic?allometric trajectories at both the interspecific and intraspecific levels. In addition, the effect of size correction of the valve shape on species differentiation was tested. Traditional morphometrics revealed that F. sublanceolata-baikali is distinguished from F. pectinalis and F. perminuta by valve length, while F. pectinalis and F. perminuta are distinguished by striae density. All three species of Fragilaria showed separate and parallel allometric trajectories. In contrast, the two populations of F. sublanceolata-baikali were on a common allometric trajectory, indicating the conspecificity between these populations. Prior to allometric correction, geometric morphometrics was not able fully discriminate between the three Fragilaria species. After allometric correction, the three Fragilaria species were clearly separated in a size-corrected morphospace, whereas the two populations of F. sublanceolata-baikali formed a tightly overlapping group. Thus, we conclude that geometric morphometrics can reliably distinguish between these morphologically similar species of Fragilaria, but only after accounting for allometric shape variation. Our study confirmed morphological similarity between the two geographically distant populations of F. sublanceolata-baikali, which indicates that this taxon can be considered as invasive in Lake Ladoga.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
invasions
Fragilaria
periphytic diatoms
geometric morphometrics
allometric trajectories
size-correction
Lake Ladoga
Lake Baikal
Megjelenés:Water. - 15 : 22 (2023), p. 1-23. -
További szerzők:Gololobova, Maria A. Kolobov, Mikhail Y. Duleba Mónika Georgiev, Anton A. Grigorszky István (1967-) (biológus-ökológus) Kiss Keve Tihamér Ács Éva (1970-) (biológus, ökológus) Somlyai Imre (1978-) (okleveles hidrobiológus)
Pályázati támogatás:RRF-2.3.1-21-2022-00008
Egyéb
TKP2021-NKTA-32
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

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
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

5.

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)
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Rekordok letöltése1 
Corvina könyvtári katalógus v8.2.27 © 2023 Monguz kft. Minden jog fenntartva.