variability

Adaptive Variability of Willow White (Salix alba L.) in the Conditions of Technogenic Pollution of the Environment (South Ural Region)

Authors: Kulagin A. Y., Ishbirdin A. R., Tagirova O. V.

The peculiarities of adaptation and variability of Salix alba L. at the morphological level were studied in extreme natural and technogenic conditions of the Southern Urals. It was found that Salix alba is characterized by a wide ecological valence, and in terms of morphological variability – is stable morphological structure. The influence of geographical, climatic and anthropogenic factors on the level of morphological integration of Salix alba was revealed.

About the Biology of the Invasive Species Hordeum jubatum L. in Bashkir Trans-Urals

Authors: Abramova L. M., Baymurzina Z. M., Yanturin S. I.

The results of researches of 7 coenopopulations of North American invasivespeciesHordeumjubatumL.(Poaceae)inthe Trans-Urals of the Republic of Bashkortostan. Hordeum jubatum spreads on the steppe zone of the region. It dominates over other plants and it is share of participation in the community is 45,5–60,5%. The density of grass invasive species – 9–18 plants per 1 m2.Each plant produces 35 to 68 shoots, on average, is more than 600 shoots per 1 m2. The biomass of the type is no more than 0.25 kg/m2. Seed production is 39–54 pcs.

The State of the Cenopopulation Delphinium Pubiflorum (Dc.) Turcz. Ex Huth in Tatishevskiy District of the Saratov Region

Authors: Shilova I. V., Kashin A. S., Petrova N. A., Ermolaeva N. N.

Delphinium pubiflorum grows sparsely in the meadow-steppe forbgrass-shrub community on carbonate chernozem fairly rich soil. Habitat conditions correspond to moderately variable meadow-steppe hydration. The spatial structure of populations of non-uniform: there are a multitude of plants and detached instances; population density was approximately 7–8 plants per 100 m2.