Tájszerkezeti változások a Szigetközben a mező- és erdőgazdálkodás, és a Duna elterelésének hatására = Landscape changes in the Szigetköz as consequences of land use and the Danube diversion
Human impacts in the past centuries have lead to a remarkable degradation of the biosphere, changes in landscape structure, land use and the decrease in landscape value. Wetlands have a landscape structure originally mosaic-like in space and time, with a special so-called ecotone feature. This mosai...
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| Dokumentumtípus: | Könyv része |
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2006
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| Sorozat: | Táj, környezet és társadalom : ünnepi tanulmányok Keveiné Bárány Ilona professzor asszony tiszteletére = Landscape, environment ans society : studies in honour of professor Ilona Bárány-Kevei on the occasion of her birthday
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| Kulcsszavak: | Tájökológia, Természetvédelem |
| Online Access: | http://acta.bibl.u-szeged.hu/62436 |
| Tartalmi kivonat: | Human impacts in the past centuries have lead to a remarkable degradation of the biosphere, changes in landscape structure, land use and the decrease in landscape value. Wetlands have a landscape structure originally mosaic-like in space and time, with a special so-called ecotone feature. This mosaic structure has been modified by different agricultural activities (arable land, meadows and pasture, extensive animal husbandry and forestry). These procedures have resulted in the fragmentation and isolation of landscape units, which are unfavourable from landscape ecology and nature conservation points of view. Arable lands, forest plantations, permanently and temporarily dried side arms and oxbow lakes, as well as degraded dry grasslands represent ecological barriers in the landscape pattern. So, the long-term maintenance of natural and semi-natural land mosaics is a key issue. The spatial cover of the characteristic Szigetköz landscape units (patches) were determined by aerial photos and field survey during 1990 and 2000. In addition to the territory of arable land (ranging from 53 to 57%), eight semi-natural (native) units were distinguished. Up to the diversion of the Danube river in October 1992, the largest areas were covered by willow-poplar woodlands, water surface and waterweed communities as well as mesophilous hayfields. Following the river water diversion – as a consequence of the drying out of a lot of side arms, oxbow lakes and a large number of wetland habitats – the territory of wetlands and the diversity of ecosystems has continuously decreased. In parallel, the degraded, featureless dry grasslands are more extended. |
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| Terjedelem/Fizikai jellemzők: | 643-655 |
| ISBN: | 963 482 782 9 |