Abstract
In this paper the presence of invasive and potentially invasive plant species in lawns of roads in Belgrade, the capital city of the Republic of Serbia was analysed. The following lawn categories were selected for the purpose of analysis: the lawns of traffic roundabouts, the lane-dividing lawns, the lawns around roads and lawns around highway. Five-year research was conducted on 32 sites in Belgrade and 183 plant species were recorded. Out of that number, 18 plant species (9.84%) were characterised as invasive and potentially invasive. The presence of considerable number of invasive species within the researched lawn categories, despite the specific ambient condition, made the grassy spaces of the roads the potential centre of wider spread on the surrounding areas. Considering the fact that on the researched surfaces, cultivating and maintaining measures are occasionally applied, the number of invasive species was lower than that in the spaces not been maintained. Key words: Invasive species, lawns, roads, invasion.
Highlights
Invasive species are increasingly becoming the focus of scientific attention, and the subject of many scientists research work
For the purpose of the research, the analysed road lawns were divided into four types of lawns: (i) grassy spaces of traffic roundabouts, (ii) the lane-dividing grassy spaces, (iii) grassy spaces around roads and (iv) lawns of major roads/ lawns of highway
It can be said that the number of plant species in the researched categories of lawns was inversely proportional to the intensity of maintenance measures
Summary
Invasive species are increasingly becoming the focus of scientific attention, and the subject of many scientists research work. Complex definition is the one stating that the plant species originating from another floristic-geographic areas are considered invasive. These species in the competition process suppresses autochthonous genetic stock and distribute themselves across the remaining ecological niches (Federal Ministry of Environment and Tourism, 2008 to 2015). As a rule, these are the species of exceptional biological potential, of great competitive abilities, highly adaptable and aggressive (Vrbničanin et al, 2004). Invasive species first occupy unstable ecosystems (degraded and devastated spaces, arable land, and similar habitat), spread to surrounding environment, causing homogenization of regional flora (Stevanović et al, 2009)
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