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Invasive capacity of Prunus serotina (Rosaceae) and its host Rhagoletis cingulata (Diptera, Tephritidae) - a case study in Croatia

Previous study of Black cherry (Prunus serotina Ehrh.) species in Pedunculate oak (Quercus robur L.) forest regeneration area of Jastrebarsko forest management unit have shown a considerable spread, indicating its invasive character and alteration in current vegetation. In this respect, the continuation of this research is focused on monitoring of spreading area and its impact on the native plant species. Also, as a part of the detection programme of Rhagoletis species in Croatia, this research includes defining potential occurrence of Cherry fruit fly (Rhagoletis cingulata) species, naturally associated with the P. serotinas’ presence. With the aim of sampling both infected and uninfected parts of the monitored area, our survey consists of 20 polygon network plots created in QGis programme and equally distributed into polygon of the regeneration area (15 plots), as well as the surrounding forest area (5 plots). In order to investigate current habitat characteristics, phytosociological approach is applied. Furthermore, the area is surveyed by the use of the unmanned aerial vehicles (UAV) DJI Mavic 2 Pro and DJI Matrice 600, both equipped with multispectral cameras and DJI Ground Station Pro for comparing results. Data analysis is performed by the use of Agisoft Metashape Professional (ver.1.5.5) programme. In addition, monitoring of Rh. cingulata species includes yellow sticky board traps located on the edges of the regeneration area. This research reveals spreading capacity and the expansion rate of P. serotina as well as Rh. cingulatas’ presence in the monitored area. With better understanding of ecology changes over a certain period of time, this also contributes to drawing conclusions about the effectivness of the control measures being implemented.

ecological factors, Jastrebarsko forest office, monitoring, spreading area, UAV

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