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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)
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2.

001-es BibID:BIBFORM099146
Első szerző:Borics Gábor (biológus)
Cím:Green Algal Flora of the Acidic Bog-Lake Baláta-Tó, SW Hungary / Borics Gábor, Padisák Judit, Grigorszky István, Oldal Imre, Péterfi István Leontin, Momeu Laura
Dátum:1998
ISSN:0006-3088
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
zöldagák
Megjelenés:Biologia, Bratislava. - 53 : 4 (1998), p. 457-465. -
További szerzők:Padisák Judit Grigorszky István (1967-) (biológus-ökológus) Oldal Imre Péterfi István Leontin Momeu Laura
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM004988
Első szerző:Krasznai Enikő (biológus)
Cím:Use of desmids to assess the natural conservation value of a Hungarian oxbow (Malom-Tisza, NE-Hungary) / Enikő Krasznai, Gizella Fehér, Gábor Borics, Gábor Várbíró, István Grigorszky, Béla Tóthmérész
Dátum:2008
Megjegyzések:A method recently proposed by Coesel that uses the desmid flora to assess the conservation value of aquatic oxbow; Desmidiales; Coesel's method; nature conservation value habitats was applied to an alkaline and hypertrophic oxbow of the Upper Tisza river (NE Hungary). According to the macrophyte community the oxbow contains two distinct habitats, both of which provide suitable conditions for the development of a rich desmid flora. High temporal and spatial differences in the algal flora were observed in periphyton and plankton samples taken in June and August 2004. The sample of Utricularia vulgaris periphyton collected in August was characterised by the most species-rich desmid flora. The conservation value of this sample was the maximum according to Coesel's method. The latter also proved to be useful for the assessment of the conservation value of plankton net samples taken from among the macrophytes. The use of modified rarity value calculations as recently proposed by Fehér did not significantly affect the conservation value, but different enumeration methods to quantify the floristic diversity did result in different conservation values. We found that Coesel's desmid based method is a useful tool for assessing the conservation value of the studied oxbow. Based our results the Coesel method's applicability and usefulness depended on (i) the sampling location (open water or macrophytic region) samples were taken from open water or from macrophytic region; and (ii) species enumeration procedures (up to 400 specimens counted, or whole droplets counted).
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
oxbow
Desmidiales
Coesel's method
nature conservation value
Megjelenés:Biologia. Section Botany. - 63 : 6 (2008), p. 928-935. -
További szerzők:Fehér Gizella Borics Gábor (biológus) Várbíró Gábor (biológus) Grigorszky István (1967-) (biológus-ökológus) Tóthmérész Béla (1960-) (ökológus)
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