THE IMPACT OF LINEAR INFRASTRUCTURE DEVELOPMENT ON THE SPREAD OF JAPANESE KNOTWEED (REYNOUTRIA SPP.) IN SERBIA

Abstract

Invasive plant species represent an increasing threat to biodiversity in riparian ecosystems, and the development of road infrastructure facilitates their spread. Japanese knotweed (Reynoutria spp.) forms dense monocultures that suppress native vegetation and destabilize riverbanks. This study examines the distribution, ecology, and management effectiveness of populations of this species within road‑construction zones in Serbia, based on monitoring results and digital mapping, comparing them with findings from international studies. It was determined that construction activities significantly influence the spread of Japanese knotweed, with increased activity intensity coinciding with the emergence of new populations and the re‑establishment of previously removed ones. Treated locations showed a substantial reduction in populations and prevention of further spread compared to untreated sites, confirming that linear infrastructure development increases the risk of invasive species expansion and that timely and long‑term application of control measures is crucial for effective management.