Biological systems are subject to a dramatic increase in invading species in the 21st century due to increasing globalization around the world. In the near future, these species will cause more extensive ecological as well as socio-economic damage. Biotic invasions will result not only in a reduction of the original biodiversity, but also total loss, particularly degradation of natural habitats – especially Natura 2000 habitats. This study aims to understand the processes of spread of invasive plant species, their way of life, adaptation to environmental changes and displacement of native species. Without the local level, it is not possible to understand these processes on the regional and continental dimensions and thus implement scientific facts and findings into the prediction of the development of global biosystems. The research was conducted during the vegetation period in the years 2017–2021 in the studied areas of non-forest and forest habitats in the central part of Slovakia. We recorded 242 localities in the area with the occurrence of invasive plant species in an area of 3.057 km2 out of the total mapped area of 169.024 km2. We recorded the highest number of localities and the most expansive distribution for the species Stenactis annua, Robinia pseudoacacia, Solidago canadensis, Impatiens glandulifera and Fallopia japonica.

The pandemic has paralyzed the world and the European economy, with the exception of the tourism sector. The aim of the paper is focused to the functional evaluation of a selected tour operator with national scope and foreign background. In this paper, we follow the scope of the travel agency and its reflection on the ongoing Covid-19 pandemic. We analyze its operation in the period 2011-2022. The research took place in 2021 during the summer season. The number of clients depends mainly on the political stability of the destination, travel arrangements and the overall behavior of visitors, which cannot be influenced by the tour operator. We compare the pre-pandemic and post-pandemic periods and the current situation in tourism in Slovakia. We also focused on forms of tourism assistance and individual aid schemes. In the pandemic period, it was dominated by domestic tourism, and so travel agencies and tour operators began to orient and adapt their products to Slovak clients.