CLIMAT URBAIN ET IMPACT SUR LE DEBOURREMENT DES BOURGEONS DE LA VEGETATION URBAINE DANS LA VILLE DE SETIF (NORD EST ALGERIEN)

Abstract

The budburst phase is one of the most temperature-sensitive parameters. The study of the
morpho-physiological parameters of urban vegetation will allow a better characterization of
the behavior of the tree in the city. This study concerns five woody species in the city of Setif
(northeast of Algeria): Rosa sp, Euonyms japonicus, Populus tremula, Morus alba and
Ligustrum vulgare. The observations were based on phenological behavior such as bud burst,
leaf expansion and senescence during the period of january to april 2022 at six sites. The
results obtained showed that the phenophase of the beginning of the buds took place between
the beginning of february and the beginning of march for all the sites. Statistical analysis
showed that the rosebush and the Japanese spindle are the first species whose appearance of
buds was observed. The phenological monitoring of the expansion of the leaves shows that
the rosebush and the mulberry occupy the first group followed by the other species. These
results illustrate the manifestations of climate change, in particular the rise in temperatures in
january and february in the city of Setif.