Аналіз часових рядів показника NDVI рослинності Великого Чапельського поду за 2010-2015 рр.
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Date
2016
Authors
Жуков, О.
Гофман, О.
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Abstract
За допомогою методу головних компонент здійснено аналіз часових рядів показника NDVI для різних типів рослинності Великого Чапельського поду за період 2010–2015 рр. Отримано власні числа головних компонент для виділених кластерів. Встановлені періоди здебільшого відбивають піврічну
та річну динаміку.
Description
The time series NDVI index for different types of vegetation of the hearth of Velykyi Chapelskyi Pid
of the Reserve of “Askania-Nova” Biosphere are presented in this paper. The data for 2010–2015 were analyzed.
The area of Velykyi Chapelskyi Pid is 2,324 ha, and the area of its drainage basin is more than 26 thousand hectares. The area of the bottom reaches 1,000 hectares. The gley soils (solod soils) are typical
for the bottom of the hearth, and dark-chestnut or leached meadow gley soils are typical for the slopes. This
area is characterized by recurrent floods (summer-autumn and winter-spring), and the latest ones have happened
much more frequently. Flood inundations of Velykyi Chapelskyi Pid happen every 7 years. The latest
flood occurred in February 2010. Another important factor that impacts Velykyi Chapelskyi Pid vegetation is
grazing by ungulates, which are dependents at the “Askania Nova” zoo. The method of principal components
was used for the investigation. The numbers of the main components are obtained for the detailed clusters.
The time series of NDVI vegetation index analysis of Velykyi Chapelsky Pid showed that dominant and common
both for the meadow and steppe vegetation is a period of 173 days, which is close to a six-month cycle.
It was also found out that the main components of meadow vegetation of the hearth bottom and its slopes reflected
almost identical oscillatory periods, while for zonal (steppe) vegetation these periods were different
because of the different biomorphological composition of these groups, and therefore different response to the
impact of external conditions (grazing and changes in the hydrogenous mode). This research confirmed the
feasibility of using remote sensing research methods for a more detailed study of dynamic processes occurring
in ecosystems. One of these areas is the study and analysis of time series of NDVI index.
Keywords
часові ряди, біосферний заповідник, Асканія-Нова, метод головних компонент, NDVI, степові фітоценози, Biosphere Reserve “Askania-Nova”, grasslands, grazing, hydrogenous mode, recurrent flooding
Citation
Жуков О. В. Аналіз часових рядів показника NDVI рослинності Великого Чапельського поду за 2010-2015 рр. / Жуков О. В., Гофман О. П. // Наукові записки НаУКМА : Біологія та екологія. - 2016. - Т. 184. - С. 40-46.