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The article aims to analyze scientific information in the scientific literature, data provided by the main herbaria in the country, and information collected from the spontaneous flora regarding the presence of the C. avellana species on the territory of Romania. Also, the distribution of C. avellana species has been analyzed according to the average annual temperature and the amount of average annual precipitations in Romania. The presence of the species on the territory of Romania was reported approximately 125 years ago in the "Conspectus of Romanian Flora" paper. In southwestern Romania, the species has been identified in different locations, for example, dendrological parks and natural parks. The practical value of this species is given by its edible fruits, which are valuable both for food and medicinal point of view or due to their agronomic characteristics. A primary objective for biodiversity conservation regarding this species should be protecting forested areas. [ABSTRACT FROM AUTHOR]

The aim of this study is to provide information on the phenology of urban spring season, of some species of ornamental trees and shrubs, in the light of climate changes occurred over the recent decades. Ten species of ornamental shrubs and trees cultivated in two areas of a town located in southwestern Romania were studied. It was found that the spring season phenology of the studied species is dependent on the climatic year, in recording differences between the number of days from November 1 and the beginning of each spring phenophase, both from one species to another and from one climatic year to another, and also from one area to another; the spring phenology starting earlier in the urban area regardless of the species and the climatic year. Higher temperatures, rising from one year to another, are speeding-up the onset and development of spring phenology, regardless of species, and the urban climate through the effect of urban heat island leads to even earlier onset of spring phenophases and shortening of the growing season, so that by phenological differences existing within the species from one climatic year to another and from one climatic zone to another, spring season phenology can be considered an indicator of temperature rise. [ABSTRACT FROM AUTHOR]

The main aim of this paper is to establish how urban environment conditions do influence the development of shrub ornamental plants in terms of their phenology. Spring season phenology of six species of ornamental shrubs and four of trees from an urban area of Muntenia, Romania, was analyzed under the influence of temperature. The analyses were made using correlations and the cold hours accumulated by species were calculated until the flowering bud breaking. The results obtained show that temperature significantly influences the onset of spring phenological phases and their duration. The research will be going on focusing on changes that occur in phenology of species from one year to another, under the influence of variable climatic conditions from year to year, in order to highlight the effect of climate changes on urban phenology. [ABSTRACT FROM AUTHOR]

Phenology is the study of periodic biological events in the plant world that are influenced by the environment. Temperature increase in spring season can advance the spring phases, but warming in autumn and winter may slow the fulfillment of chilling requirements and lead to later onset of spring events. This study examined different genotypes of walnut trees under environmental conditions, and measured the cold demand, heat requirements, and average time from budburst till flowering for 28 walnut genotypes. The information obtained provides a better understanding of the phenological temperature response of walnuts that will be useful for walnut production and will also contribute to the development of adaptation measures in the light of the expected climate change. [ABSTRACT FROM AUTHOR]