THE CLIMATE OF A LARGE CITY AND ECOCLINE ORDINATION OF ITS VEGETATION COVER
THE CLIMATE OF A LARGE CITY AND ECOCLINE ORDINATION OF ITS VEGETATION COVER

Summary/Abstract: Large cities generate their own climate, which influences the distribution of vegetationcover and individual species population into separated ecological phytocoenotic zones ecoclines.By the example of urban ecology research conducted in the city of Lviv with a population of aboutone million inhabitants, the nature of this ecocline ordination has been revealed. It is the result ofaction of vertical and horizontal gradients on woody plants phytovitality. The manifestation ofthese changes is increasing scarcity in phytocoenotic structure of vegetation, water deficit in theleaves, ratio distortion of the pigment composition. There are proposed certain methods forassessing the phytovitality of the introduced species. In the I EPhZ suburban forest we deal withthe “new” climatope and edaphotope. In the II EPhZ — the park, there is a forest-steppe climatopeand edaphotope due to the thin vegetation and a larger area of open spaces. In the III EPhZ — inpublic gardens where open insolated spaces dominate — there is steppe climatope and edaphotope. In IV EPhZ, where the high dryness of air and soil in streets and squares prevails, there is a desertclimatope and edaphotope. In the I, II and III EPhZ soil temperature is always lower than thetemperature in the crown, which corresponds to the physiological needs of plants. In IV EPhZ thesoil temperature around the tree trunk is higher than the air temperature in the tree crown.

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