@conference{
author = "Savić, Aleksandra and Oveisi, Mostafa and Müller Schärer, H. and Vrbničanin, Sava",
year = "2024",
abstract = "Ambrosia artemisiifolia (AMBEL) and Ambrosia trifida (AMBTR) are recognized as troublesome invasive plant species in several regions of the world, including Europe. Under their impact, crop production is reduced in the invaded areas, and a large amount of pollen produced is harmful to human health. The height and density of these species can produce strong shading effects and inhibit the growth of other species, which is a precondition significantly changing the biodiversity and structure of the invaded ecosystems. Unlike AMBEL, which is widespread in many parts of Serbia, AMBTR is currently naturalized only in the area of central Bačka. Their harmful impact has also been noted in this area. Given all the above, the aim of this research was focused on examining the interaction of two ragweed species and their impact on other species in the plant community. During 2016 and 2017, field experiments were carried out at a farm near Dobrić, Republic of Serbia (44°41′N, 19°34′E). Unlike AMBEL, which forms dense populations in this area and greatly impacts crop production, AMBTR has not yet been recorded in this part of Serbia. Seeds of AMBTR were collected in autumn 2015 from infested crop fields in Central Bačka (45°30′N, 19°31′E). The experiment was set up as a replacement series design (four replicates) in different AMBEL/AMBTR ratios per m2: 10/0; 8/2; 6/4; 4/6; 2/8; 0/10. In addition to maintaining the total number of ragweed/m2, other weed species were not removed. They were more or less homogeneously distributed, with the most abundant species being Setaria viridis, Echinochloa crus-galli, Sorghum halepense, Polygonum aviculare, Cirsium arvense, Chenopodium album, Plantago major, and Erigeron annuus. The dry mass of plants was measured to assess interactions, and data analysis was performed in R-studio. During both seasons, ANOVA showed the same trend. With the increase in the number of AMBTR/m2 and the decrease in the number of AMBEL/m2, the dry mass of AMBTR decreased. Opposite, with the increase in the number of AMBEL and the decrease in AMBTR, the dry mass of AMBEL was increasing. According to the results, it can be concluded that interspecific competition is larger for AMBEL, in contrast, intraspecific is greater for AMBTR. During both seasons, in the treatments with the increase in the number of AMBTR and the decrease in the number of AMBEL/m2, the dry mass of other weeds decreased. Additionally, we conclude that AMBTR had a greater impact on other weeds in the plant community.",
journal = "Internacional Ragweed Society Conference, 8-9 September 2024, Budapest, Hungary",
title = "S1 – O6 COMPETITIVE HIERARCHY OF TWO RAGWEED SPECIES AND ITS EFFECT ON OTHER WEEDS IN THE PLANT COMMUNITY",
pages = "30",
doi = "10.19040/ecocycles.v8i3.242"
}
