It is located in the Tyoshe-Seryozhinsky karst area of the Oka-Sura karst region or Seryozhe-Panskoy karst lake district. Its creation is justified by the need to protect the rare species of living organisms, diverse types of vegetation, unique landscapes and plant communities that are concentrated in this territory. Despite the fact that in 1934 on the shore of the Great Lake in the Staraya Pustyn village the biological station of the State University of Nizhny Novgorod was founded, local flora of the karst lakes which are linked into a single system by the channel of the River Seryozha, remains insufficiently studied. In 2014 and 2015 the authors conducted a study of the flora of the Pustynsky lake-river complex. The collection of material for study of the taxonomic composition of the flora of the reservoirs and the collection of herbarium material were carried out by the route method from a rowing boat and, in part, by traversing along the shore. Taxonomic, ecological (including the spectrum of life forms of plants) and ecobiomorphological analysis of the flora, including the analysis of the ratio of its latitudinal and longitude elements, was carried out in cameral conditions. The taxonomic analysis of flora showed 162 species of vascular plants from 61 genera and 42 families, 6 of these species-Najas minor All., N. major All., Trapa natans L., Potamogeton praelongus Wulf., P. trichoides Cham. et Schlecht. and Carex bohemica Schreb, being included in the List of Rare and Protected Species on the Territory of Nizhny Novgorod oblast. On the basis of the annotated list of plant species, taxonomic, geographic, ecological-coenotic and ecobiomorphological analysis of the flora of the water reservoirs was made. We confirmed that the flora of the lake-river complex is traditional for this territory. Poaceae, Cyperaceae, Potamogetonaceae, Polygonaceae and Asteraceae belong to the dominant families and Potamogeton L., Carex L., Juncus L. and Salix L. belong to the dominant genera of the Pustynsky lake-river system. The level of the hybrid component of the flora is extremely low, which is typical for the watershed lakes. We found that a 6.5 km stretch of the Seryozha River accounts for about 30% of species of the vascular plants belonging to the flora in the Volga River basin. The high species richness of the flora of this territory is due, primarily, to the specific features of the shoreline, forming a broad range of habitats and the relatively stable water level regime despite the strong fluctuation in the level of anthropogenic pressure. We found that boreal and plurizonal elements dominate zonally but Holarctic and Eurasian species-regionally. The predominance of species typical for the ecotone zones of lakes (hygrophytes, hydrophytes and mesophytes) is an integral feature of the ecological-coenotic diversity which is characteristic of the Volga River basin. According to the Raunkiaer classification of life forms, hemicryptophytes are the most numerous group and the hamephytes are the least numerous one. A biomorpho...
The "Flora of Russia" project on iNaturalist brought together professional scientists and amateur naturalists from all over the country. Over 10,000 people were involved in the data collection. Within 20 months, the participants accumulated 750,143 photo observations of 6,857 species of the Russian flora. This constitutes the largest dataset of open spatial data on the country’s biodiversity and a leading source of data on the current state of the national flora. About 87% of all project data, i.e. 652,285 observations, are available under free licences (CC0, CC-BY, CC-BY-NC) and can be freely used in scientific, educational and environmental activities.
Поступила в редакцию 16.04.16 г. О распространении Caulinia minor (AlL.) Coss. et J. N. E. Germ (Hydrocaritaceae, Liliopsida) на территории Нижегородской области.-Бирюкова О. В., Шестакова А. А., Беляков Е. А., Гарин Э. В.-Приведены результаты анализа распространения Caulinia minor на территории Нижегородской области с учётом литературных источников, материалов гербариев и собственных полевых исследований. Выявлена приуроченность вида к водоёмам с хорошо прогреваемыми мелководьями и минерализованными водами. Обосновано внесение вида в региональную Красную книгу ввиду нахождения на границе ареала. Предложено повысить категорию редкости вида в регионе, даны рекомендации по его охране. Ключевые слова: Caulinia minor, Нижегородская область, редкий вид, Красная книга. On the distribution of Caulinia minor (All.) Coss. et Germ. (Hydrocaritaceae, Liliopsida) on the territory of the Nizhny Novgorod region.-Birykova O. V., Schestakova A. A., Belyakov E. A., and Garin E. V.-The results of our analysis of the Caulinia minor distribution in the Nizhny Novgorod region on the basis of published sources, herbaria samples and the authors' original data are presented. The species preferring water bodies with well-warmed shoals and high mineralization levels was revealed. The species entering the Red Data Book is justified due to its location on the border of the habitat. It is proposed to promote the rarity status of the species in the region; recommendations on its conservation are given.
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