Acta Zoologica Academiae Scientiarum Hungaricae 44 (3), pp. 195203, 1998

Title: On the interpretation of plexus diagrams: an example of Canadian microcrustacean communities

Authors: Moskát, C. and L. Forró

Authors' addresses: Animal Ecology Research Group, Hungarian Academy of Sciences, c/o Hungarian Natural History Museum, H-1088 Budapest, Baross u. 13, Hungary, E-mail: moskat@zoo.zoo.nhmus.hu
Department of Zoology, Hungarian Natural History Museum, H-1088 Budapest, Baross u. 13, Hungary, E-mail: forro@zoo.zoo.nhmus.hu

Abstract: Microcrustacean communities and chemical variables measured in Canadian saline lakes were analyzed to demonstrate the usefulness of plexus diagrams with the aim to elucidate structure in species-environmental complexes. Some of the alternative multivariate techniques to calculate and draw plexus diagrams were also examined. It was shown that, depending on the type of transformation of the rank correlation matrix, both the highly negative and the highly positive values can have the same effect, a tendency for points to get closer on the diagram. This type of plexus diagrams emphasises the high associations including negative relationships, like the avoidance of a habitat component. It is also shown that plexus diagrams are suitable to display community structure hierarchically by the strength of associations at different significance levels. The plexus diagram helped identify species preferring saline lakes, generalists, and species avoiding saline waters.

Key words: multivariate analysis, plexus diagram, ordination, community structure, Branchiopoda, Copepoda, saline waters, British Columbia


Acta Zoologica Academiae Scientiarum Hungaricae 44 (3), pp. 205281, 1998

Title: Twenty two new species and six new subspecies of Noctuidae from Turkmenistan and adjacent regions (Lepidoptera)

Authors: Ronkay, L., Varga, Z. and M. Hreblay

Authors' addresses: Department of Zoology, Hungarian Natural History Museum, Baross u. 13, H1088 Budapest, Hungary, E-mail: ronkay@zoo.zoo.nhmus.hu
Department of Zoology and Evolution, Kossuth Lajos University, H4010 Debrecen, Hungary, E-mail: zvarga@tigris.klte.hu
Somfa u. 15, H2030 Érd, Hungary

Abstract: Descriptions of Euxoa sayvana, Eicomorpha firyuza, Cucullia petrophila, C. xerophila, C. apo, Omphalophana turcomana, Allophyes sericina, Episema minutoides, Dasypolia nebulosa, D. ipaykala, Polymixis pericaspicus, P. schistochlora, P. fabiani, P. achrysa, P. csorbagabori, Agrochola turcomanica, Cryphia basivittata, C. duskeimima, Gortyna roseago, Chilodes repeteki, Haemerosia albicomma, H. ionochlora spp. n. and Periphanes delphinii tekke, Conisania vidua eupepla, Dasypolia templi dushaki, Bornolis crinomima diluta, Agrochola oropotamica archar and Autophila luxuriosa arnyekolta sspp. n. are given. The taxonomic states of some species recently described from Turkmenistan are discussed, new synonymies, new status and combinations are established. With 175 figures.

Key words: new species and subspecies, Noctuidae, Turkmenistan