L. Forró szerk.: Miscellanea Zoologica Hungarica 13. 2000 (Budapest, 2000)

Spolwind, R., Schludermann, C. , Schuster, A.; Waidbacher, H.: Comparison of fish and amphibian communities in a floodplain system of the rivers Traisen and Danube westwards of Vienna

Fish and amphibian coenoses: characterizing parameters Figure 3 shows the distribution of the detected fish species in the Danube-Traisen and the Traisen system. Due to its higher variability in backwater types, the Danube-Traisen system shows higher species numbers. We distinguished stable fish coenoses (species assemblages capable of reproducing themselves) and coenoses that are formed by a massive flood event that occurred a few weeks before sampling (Fig. 4). The stable coenoses showed a characteristic population structure, backwaters with stable coenoses were rare and limited mainly to larger backwaters in the Danube-Traisen system. Small backwaters usually showed no, or untypical fish assemblages and were found in the Traisen as well as in the Danube-Traisen area. Figure 5 shows the records of the 11 amphibian Fig. 3. Distribution of recorded fish species in the Traisen and Danube-Traisen region. 63 backwaters were investigated. Abbreviations are shown in Tab. 2; Cyprinid larvae (Cypr. larv.)are indeterminable larvae of Cyprinid fishes