Abstract
Altogether, 78 terrestrial mollusc species were recorded on 31 plots in a stretch of the Tichá Orlice River valley between the cities Choceň and Letohrad (East Bohemia, Czech Republic) in 2007 and 2009. This region harbours 46% of the total terrestrial mollusc fauna of the Czech Republic. The fairly high species richness corresponds to a high habitat diversity and species pool of the region that includes Alpine and Carpathian elements. Of prime conservation importance is a high share of rare and endangered species (EN-2, VU-9, NT-14 species) and species mostly having an isolated population there from the main distribution range. This region is a real hotspot of forest gastropods in Transalpine Europe.
Highlights
Sledované území představuje úsek údolí řeky Tiché Orlice zhruba mezi městy Letohrad a Choceň
78 terrestrial mollusc species were recorded on 31 plots in a stretch of the Tichá Orlice River valley between the cities Choceň and Letohrad (East Bohemia, Czech Republic) in 2007 and 2009
Of prime conservation importance is a high share of rare and endangered species (EN-2, VU-9, NT-14 species) and species mostly having an isolated population there from the main distribution range. This region is a real hotspot of forest gastropods in Transalpine Europe
Summary
Myšák J. & Horáčková J., 2011: Malakofauna údolí Tiché Orlice [Mollusc fauna of the Tichá Orlice River valley]. – Malacologica Bohemoslovaca, 10: 38–44. 78 terrestrial mollusc species were recorded on 31 plots in a stretch of the Tichá Orlice River valley between the cities Choceň and Letohrad (East Bohemia, Czech Republic) in 2007 and 2009. This region harbours 46% of the total terrestrial mollusc fauna of the Czech Republic. Spodní partie v okolí toku jsou doplňovány také říčními a sprašovými kvartérními sedimenty (podle Bureš & Burešová 1997, Michalski et al 1988, Müller & Vopršálková 1993, Škrabalová 2006). Na rozsáhlých územích jsou bohužel vysázeny také stejnověké monokultury nepůvodní borovice lesní (Pinus sylvestris) nebo smrku ztepilého (Picea abies). Územím se šíří také invazivní druhy rostlin, jako jsou křídlatky (Fallopia spp.), slunečnice topinambur (Helianthus tuberosus) nebo netýkavka žláznatá (Impatiens glandulifera)
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