Continuous pollen and chironomid records from Lake Emanda (65°17′N, 135°45′E) provide new insights into the Late Quaternary environmental history of Yana Highlands (Yakutia). Larch forest with shrubs (alders, pines, birches) dominated during deposition lowermost sediments suggesting its Early Weichselian [Marine Isotope Stage (MIS) 5] age. Pollen- chironomid-based climate reconstructions sugges...

Several millennial-scale warm phases perturbed the glacial climate during Marine Isotope Stage 3 (MIS 3, ca. 57–29 ka BP). Little is known about impact of these climatic changes on Alpine ecosystems due to sparsity undisturbed sediment records in Alps and their foreland. In this study, multiple sediment-archived proxies (sediment geochemistry, stable oxygen carbon isotopes autochthonous carbona...

Chironomids (Diptera: Chironomidae; non-biting midges) are known to be carriers of the Vibrio cholerae bacterium, responsible for the fatal cholera disease in humans. It was recently discovered that chironomid females choose their oviposition site by a visual cue. In this study, we test the hypothesis that this visual cue is the linear polarization of light reflected from the water surface. We ...

Massive mosquito nuisance problems, caused by the flood-water mosquito Aedes sticticus, occur after floods in the flood plains of the River Dalälven, central Sweden. Since 2002, the biological mosquito larvicide Bacillus thuringiensis var. israelensis (Bti) has been used to control these mosquitoes. Here, we report results from the first six years of monitoring Chironomidae, the most susceptibl...

Abstract The taxonomic composition, structure, and spatial distribution of zoobenthos have been studied in 25 water bodies the Arctic tundra. Eight types thermokarst bodies, representing stages succession cycle, identified for central Yamal Peninsula. Water initial cycle are located on hills, middle at edge valleys, latest valleys. In total, 161 species found; their abundance diversity vary wit...

Massive mosquito nuisance problems, caused by the flood-water mosquito Aedes sticticus, occur after floods in the flood plains of the River Dalälven, central Sweden. Since 2002, the biological mosquito larvicide Bacillus thuringiensis var. israelensis (Bti) has been used to control these mosquitoes. Here, we report results from the first six years of monitoring Chironomidae, the most susceptibl...

BACKGROUND & OBJECTIVES The predatory potential of the larvivorous fishes can be affected by the presence of alternative preys. In the present study the predation pattern of the sewage dwelling Poecilia reticulata (Peters 1872) on the larvae of Culex quinquefasciatus Say 1823 (Diptera: Culicidae) was evaluated in the presence of alternative preys. METHODS The predation of Cx. quinquefasciatus...

It is widely accepted that distributions of plants and animals are broadly constrained by their physiological tolerances to climatic factors (Woodward, 1987, 1990). This generalization is held to be true for species at a variety of spatial scales (Whittaker et al., 2001), although there is a wide recognition that the importance of climate is best expressed at large spatial scales (Rahbek & Grav...