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Matej Masný, Karol Weis and Martin Boltižiar

Abstract

Agricultural land in many post-socialist countries passed through a similar scenario of eminent changes in the past decades. One of the important milestones was the process of collectivisation (in 1950−1970), transformation to market-oriented economy (after 1989) and the following integration into the European Union. These changes were often attended by the process of agricultural abandonment. This paper presents an approach to the evaluation of agricultural abandonment by analysis of land use change in chosen terrain attributes (slope levels and altitude levels) context. It studies the area of a northern part of the Poľana UNESCO (United Nations Educational, Scientific and Cultural Organization) Biosphere reserve that represents mountain agricultural landscape. All of the analyses were realised in GIS (geographic information systems), based on the orthophotos that represented the land use structure in 1949, 1986 and 2006. Dramatic decrease in real usage of agricultural areas attended by the process of secondary succession was observed especially in steep slopes and higher altitude levels. To quantify the changes, landscape metrics such as class area (CA), number of patches (NP) and mean patch size (MPS) were used. Changes in landscape classes had an influence on landscape diversity. It was expressed by decrease in Shannon‘s diversity index (SDI) and Shannon‘s evenness index (SEI).

Open access

Daniel Kubinský, Karol Weis, Milan Lehotský and Jakub Fuska

Abstract

This article is focused on the analysis and evaluation of the changes of the bottom of the Bakomi reservoir, the total volume of the reservoir, ecosystems, as well as changes in the riparian zone of the Bakomi reservoir (situated in the central Slovakia). Changes of the water component of the reservoir were subject to the deposition by erosion-sedimentation processes, and were identifed on the basis of a comparison of the present relief of the bottom of reservoir obtained from feld measurements (in 2011) with the relief measurements of the bottom obtained from the 1971 historical maps, (i.e. over a period of 40 years). Changes of landscape structures of the riparian zone have been mapped for the time period of 1949–2013; these changes have been identifed with the analysis of ortophotomaps and the feld survey. There has been a signifcant rise of disturbed shores with low herb grassland. Over a period of 40 years, there has been a deposition of 667 m3 of sediments. The results showed that there were no signifcant changes in the local ecosystems of the Bakomi reservoir in comparison to the other reservoirs in the vicinity of Banská Štiavnica.