CCL

Összesen 4 találat.
#/oldal:
Részletezés:
Rendezés:

1.

001-es BibID:BIBFORM083449
Első szerző:Berta Csaba (hidrobiológus)
Cím:Examination of heterogeneity by Cladocera community along an oxbow lake in Central Tisza region. / Berta Csaba, Korponai János, Grigorszky István, Nagy Sándor Alex, Simon Edina, Somlyai Imre, Gyulai István
Dátum:2018
Tárgyszavak:Természettudományok Biológiai tudományok nem besorolt
egyéb
Cladocera
Megjelenés:15th Subfossil Cladocera Workshop : Abstract book. - p. 1-11.
További szerzők:Korponai János (1964-) (biológus) Grigorszky István (1967-) (biológus-ökológus) Nagy Sándor Alex (1956-) (hidrobiológus) Simon Edina (1981-) (ökológus) Somlyai Imre (1978-) (okleveles hidrobiológus) Gyulai István (1980-) (biológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
Borító:

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

3.

001-es BibID:BIBFORM075110
Első szerző:Berta Csaba (hidrobiológus)
Cím:Cladocerans as indicators in the importance of passive nature conservation / Csaba Berta, István Gyulai, József László Szabó, Edina Simon, Alex Sándor Nagy, Imre Somlyai, István Grigorszky
Dátum:2018
ISSN:0006-3088 1336-9563
Megjegyzések:The aim of our study was to verify the effectiveness of passive nature conservation with regard to the preservation of species, by examining a typical mesozooplankton community. We investigated five oxbow lakes which were similar to each other in terms of size, depth and close-to-each, but which differed markedly from one to another in terms of lake management. One is under passive protection, the others are under different forms of management. Based on the NMDS (Non-metric Dimensional Scaling) analysis, we identified the variable (transparency) which is responsible for the segregation. In the case of rare species IndVal (Indicator Value) analysis was used to evaluate the occurrence and significance of indicator species. We also found marked differences in the species composition; seven species showed indicator values for the protected oxbow lake, five of which were significant (p <?0.001). In contrast, in the case of the other four oxbow lakes, a total of one species showed an indicator value. Finally, regression tree analysis was used to distinguish the oxbow lakes from each other for both common and mass-occurring species. Among the mass-occurring species, the protected oxbow lake is characterized by a large number of Acropreus harpae (Baird, 1835), while in case of the other, non-protected, oxbow lakes Alona guttata (Sars, 1862) and Alonella excisa (Fischer, 1854) are the basis for the separate classification. There is a positive effect of passive protection regarding the quantitative and qualitative occurrence of the zooplankton community. Our study highlights the importance of this kind of passive protection in the life of a particular water body and advocates that their protection should be maintained.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Biologia. - 73 : 9 (2018), p. 875-884. -
További szerzők:Gyulai István (1980-) (biológus) Szabó József László Simon Edina (1981-) (ökológus) Nagy Sándor Alex (1956-) (hidrobiológus) Somlyai Imre (1978-) (okleveles hidrobiológus) Grigorszky István (1967-) (biológus-ökológus)
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

4.

001-es BibID:BIBFORM102672
035-os BibID:(cikkazonosító)2149 (WoS)000833329100001 (Scopus)85134040601
Első szerző:Tumurtogoo, Uyanga
Cím:Density and Diversity Differences of Contemporary and Subfossil Cladocera Assemblages: A Case Study in an Oxbow Lake / Uyanga Tumurtogoo, Aida Figler, János Korponai, Zsófi Sajtos, István Grigorszky, Csaba Berta, István Gyulai
Dátum:2022
ISSN:2073-4441
Megjegyzések:Cladocerans are biological indicators of environmental changes. Their remains provide information on past changes in lake environments. We studied the correspondence between con- temporary Cladocera assemblages and their subfossil remains from an oxbow lake. We sought to demonstrate that there were differences among the various sites of an oxbow lake with different utilization based on contemporary and subfossil Cladocera assemblages and physical?chemical variables. The oxbow lake's two sides are used as fishing sites, where angling is the main activity. The middle site of the lake is under nature protection with high macrovegetation coverage. Contemporary and subfossil Cladocera assemblages were sampled from 21 sampling sites along the oxbow lake. Our research showed that the subfossil Cladocera assemblages had higher species richness and densi- ties (36 taxa) than the contemporary species (29 taxa). We found one species of the Polyphemidae family only in the contemporary assemblage. Among the sites, Cladocera assemblages differed in their species composition and density. The highest densities were found in the second fishing site due to the appearance of the small-sized Bosmids. The relationship between Cladocerans and the physical?chemical variables showed that some variables, such as chlorophyll-a, biological oxygen demand, dissolved oxygen, copper, phosphide, and organic matter content, significantly affected Cladocera composition. We found that the subfossil Cladocera assemblage was significantly more diverse and abundant than the contemporary one, indicating that an integrated sampling may be sufficient to provide better results on the total species composition of the water body.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
physical-chemical variables
contemporary
subfossil
Cladocera
fishing and natural site
Megjelenés:Water. - 14 : 14 (2022), p. 1-14. -
További szerzők:Figler Aida (1993-) (okleveles hidrobiológus) Korponai János (1964-) (biológus) Sajtos Zsófi (1994-) (kémikus) Grigorszky István (1967-) (biológus-ökológus) Berta Csaba (1991-) (hidrobiológus) Gyulai István (1980-) (biológus)
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Rekordok letöltése1