Features of birch forests of the south of Tyumen region

Birch forests with the dominant Betula pendula form on the territory of the Western-Siberian Plain asubtaiga zone, which is an analogue of the zone of broadleaf forests of European Russia. In addition, birch is an importantcomponent of the ring forest steppe of Western Siberia. As a zonal type of vegetation, birch forests include special species.Their occurrences are shown on the example of birch forests of Aromashevsky district in Tyumen region. The mechanismof their phytocenogenesis is proposed.

Restoration of the Catchment Hydrographic Network as the Main Method of Struggle with Watershed Swamping

The paper emphasized the necessity of measures on struggle with swamping of agricultural and forest lands of the Western-Siberian Plain via cleaning of the hydrographic network close to bogs. This will provide timely discharge of excessive waters from wetlands, and will decrease the subsoil waters level. Advantages of this approach in comparison with the traditional drainage methods have been shown as well. To substantiate the proposed approach the original hydrological assessment of the swamping causes is being presented.