Changes of ecotopic characteristics in «Yelanets Steppe» Reserve during the first decade since being established

Authors

  • V.S. TKACHENKO

Keywords:

steppe reserve, first decade of reservation, synphytoindication, fires, drought, changes of ecotopic features.

Abstract

This paper is to continue and amplify the previous report on structural changes of vegetation in Natural Reserve «Yelanets’ky steppe» (1675.7 ha, Mykolayiv, Ukraine). Synphytoindicative assessment of the Reserve was made for the two different time spans with 10 years gap (1997-2007). An ordination of phytoindicative parameters of main communities and different coenotic combinations was executed. The most of steppes and petrophytic communities are distributed in the zone of very limited water supply. An assumption of destroying impact of frequent fires on steppe vegetation was confirmed. Total range of water supply in the reserve is very large, but the main part of it covers lowchanging ecotopes of deep depressions with intrazonal vegetation. There were also strengthening of the soil carbonate content, enrichment of pedosphere with salts, and reduction of the content of nitrogen compounds in soils. Ecotopic changes in «Yelanets’ky Steppe» habitats were unfavorable for the renewal (demutation) of vegetation. Only general aridisation could cause such direction of changes with intrazonal ecotopes of gully bottoms contrasted with plakor-zonal ones.

References

ДІДУХ Я.П., ПЛЮТА П.Г. Екологічні режими степових і лісостепових угруповань у підзоні Північного степу // Укр. ботан. журн. – 1992. – Т. 49, № 4. – С. 13-18.

ПЛЮТА П.Г. Екологічні режими фітоценозів степової частини Побужжя (Миколаївська область) // Укр. ботан. журн. – 1992. – Т. 49, № 5. – С. 44-49.

ТКАЧЕНКО В.С., СИРОТЕНКО П.О. Вихідний стан рослинності “Єланецького степу” в системі фітоценологічного моніторингу // Укр. ботан. журн. – 1999. – Т. 56, № 6. – С. 623-629.

ТКАЧЕНКО В.С., ОСТРІВНА Ю.І. Синфітоіндикаційна характеристика вихідного стану природного заповідника “Єланецький степ” // Укр. ботан.журн. – 2006. – Т. 63, № 5. – С.681-693.

ТКАЧЕНКО В.С. Структурні зміни в рослинному покриві “Єланецького степу” за перше десятиліття заповідання // Чорноморськ. бот. ж. – 2009. – Т. 5, № 3. – С. 319-332.

Published

2010-01-18

How to Cite

TKACHENKO, V. (2010). Changes of ecotopic characteristics in «Yelanets Steppe» Reserve during the first decade since being established. CHORNOMORSKI BOTANICAL JOURNAL, 5(4), 475–490. Retrieved from https://cbj.kspu.edu/index.php/cbj/article/view/595

Issue

Section

Тhеоretical and Applied Problems