Abstract
The possible impact of the climate changes on vegetation is a key topic of various research studies in geography and ecology. In this study we tried to provide a «one-time survey» of the phenological development of Prunus padus L. in the Yekaterinburg city as a part of the large-scale project “A Single Phenological Day ” and show the data on a map. The registration of a seasonal development of bird cherry was provided annually in the years of 2012-2018 on one and the same date in the city of Yekaterinburg, on 15 May. Yekaterinburg is the largest city located on the eastern foothills of the Middle Urals, Russia. The city has residential areas, parks, water reservoirs, as well as large industrial facilities that affect microclimatic conditions, resulting in an increase of the temperatures. Such microclimatic heterogeneity results in uneven development of bird cherry in spring. It was revealed the slowing of the bird cherry development in the areas situated close to large water reservoirs. At the same time bird cherry trees growing inside large industrial areas, on the contrary, developed much faster. The development rates of Prunus padus L. also differed though years: in years with dry and warm weather during the period of late April - early May the vegetation began earlier.
Highlights
The study of the spatial and temporal variability of seasonal nature phenomena is very important issue of modern geography and landscape ecology
We compared the average rate of phenological development in the city and its deviations from the multiyear average, as well as meteorological indicators that may influence spring development of the studied species (Table 1) receiving data on the temporal variability of vegetation period of Prunus padus L. in spring on the territory of Yekaterinburg
The observations have shown that the temperature of lawns and areas with a natural coating is 2-2.5°C lower than the temperature around city squares. This is confirmed by the highest rates of phenological development of Prunus padus L. around them
Summary
The study of the spatial and temporal variability of seasonal nature phenomena is very important issue of modern geography and landscape ecology. The study of variability and inter-annual fluctuation in vegetation phenology is one of the simplest and low-cost approach to analyze changing weather and climate conditions. The timing of the onset of seasonal phenomena allows to indicate local and regional changes in climatic variables affecting plant development over growing season. The concept of global phenology monitoring was formulated first in 1977 by Vladimir Batmanov (Yantser et al 2010), the founder of the Ural phenological school. This idea was based on simultaneously registering the stage of seasonal development of a certain distinct species by numerous observers on a wide geographical area. Batmanov was turned into a global research project – The Nationwide Phenology Day (NPD)
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