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Saline rivers are supposed to be ‘hot spots’ of high biological productivity in arid landscapes. To test this, we quantified the production of chironomid larvae, because river production is known to be transferred to arid landscapes primarily by birds fed on these larvae. In addition, we studied the potential biochemical quality of the larvae for birds(More)
The review of the salinity tolerance of various macrozoobenthos taxa is based on the published data and the results of our studies. Significant differences in the tolerance of hydrobionts to water salinity in rivers of different arid regions are shown. Leeches, bivalved mollusks, larvae of stoneflies, caddis flies, and mayflies are the most stenohaline(More)
The present paper deals with the results of the first study (April and August, 2006–2007) of the taxonomic composition of macrozoobenthos in the highly mineralized Khara River. The study revealed 35 species and taxa of the rank above species. Data were obtained on the spatial distribution of the species composition dynamics and on the quantitative(More)
Models for relationship between sampling effort and estimates of species number and other characteristics of species diversity are considered and evaluated. In the analysis, different randomization algorithms and other statistical methods of monitoring data processing are used including jackknife and bootstrap procedures, algorithms ICE and Chao2,(More)
Indicator valences, taking into account the regional features of the middle and lower Volga River basin of water quality classes for the benthofauna of lowland rivers, are calculated. The lists of 450 species that can be used to indicate pollution are given. An advanced method of estimating bioindication factors of bottom organisms is used. The results of(More)
Benthos investigations were carried out in the channel and flood-plain of the Kuibyshev water reservoir during 1958–1985. Hydrobiological monitoring data obtained at 12–16 stations in all Deeps excluding littoral areas are discussed. In 1987–1900 benthofauna distribution was also studied at the Priplotinny Deep. An increase of the reservoir trophic state is(More)
The use of different methods of multivariate ordination for the analysis of the distribution pattern of benthic habitats along the gradient of a river ecosystem is considered. Problems of determination of homogenous segments of a stream are discussed using macrozoobenthos communities of small rivers of the lower Volga Basin as examples. A method for(More)
Karyotype and morphology of Chironomus sp. larvae from the Caspian Sea have been described. 2n = 8. Chromosomal arm combination is AB, CD, EF, G (cytocomplex thummi). All chromosomes display conjugation of homologues. Centromere areas are of s-type. The nucleolar organizer and two Balbiani rings are disposed in arm C, and another Balbiani ring is in arm B.(More)
All stages and the ecology of the Southern Palaearctic Palpomyia schmidti collected from the vicinity of the saline Lake Elton in Russia are described and illustrated. The morphology of larvae and pupae as well as the detailed ecology of the larvae are described for the first time. P. schmidti is a halobiontic biting midge, widely distributed in the steppes(More)