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Společenstva měkkýšů podél dálnic ve vazbě na proměnné prostředí
Juřičková, L. ; Kučera, Tomáš
Motorways are one of the widespread and frequently discussed landscape features, especially in Central Europe. We established three transects along the three main motorways in southeastern, southwestern, and northern directions from Prague (D1, D5, R10). These transects covered major environmental gradients of geographical position, altitude, succession, and vegetation cover. Altogether 44 land snail species (more than 26 % of the Czech Republic’s land snail fauna) were found at the 45 sites on the verges along 225 km of motorways. Surprisingly 21 % of species were such included in the Red List of the Czech Republic’s molluscs, and the endangered species Daudebardia brevipes was even present by a very abundant population. We expected the motorways to be of importance as man-made linear structure for the spreading of invasive and synathropic species, but only one such species has been found - Monacha cartusiana.
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Společenstva měkkýšů podél dálnic a jejich vztah k prostředí
Juřičková, L. ; Kučera, Tomáš
Motorways are one of the widespread and frequently discussed landscape features, especially in Central Europe. We established three transects along the three main motorways in southeastern, southwestern, and northern directions from Prague (D1, D5, R10). These transects covered major environmental gradients of geographical position, altitude, succession, and vegetation cover. Altogether 44 land snail species (more than 26 % of the Czech Republic’s land snail fauna) were found at the 45 sites on the verges along 225 km of motorways. Surprisingly 21 % of species were such included in the Red List of the Czech Republic’s molluscs, and the endangered species Daudebardia brevipes was even present by a very abundant population. We expected the motorways to be of importance as man-made linear structure for the spreading of invasive and synathropic species, but only one such species has been found - Monacha cartusiana.
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Biotopes evaluation and assessing using Natura 2000 mapping system
Cudlín, Pavel ; Kučera, Tomáš ; Prokopová, Marcela ; Francírková, Tereza ; Burešová, Renata ; Smrž, T. ; Boucníková, Eva ; Hellebrandová, K. ; Petříček, V. ; Dejmal, I. ; Seják, J.
For creating price maps, data from NATURA 2000 mapping system are useful and they give topographically more accurate data than CORINE Land Cover. Nevertheless the total price differed very slightly, probably because of the studied area was large enough. Individual evaluation changed the total value mainly in case of natural and close to nature biotopes. The total value of the whole area was changed by only approximately 2 or 5% (according to used procedure of data transfer). It means that individual evaluation could be ignored for price map formation, in the last resort.
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