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Cerna K. et al.<br />
Lepidoptera in Sudetes Mts.: effect of area and isolation<br />
Sudetes Mts. and large degree of endemism here, because species limited to single site<br />
and/or small populations are more prone to extinction.<br />
We have shown that connectivity is one of the best predictor of species richness<br />
because it involves both factors affecting species richness: area and the nearest distance<br />
between sites (see section 3.4). Therefore the sites with largest connectivity (Maly Ded,<br />
Praded and Vysoka hole) host the highest number of diagnostic species, including arcticalpine,<br />
boreo-alpine, boreo-montane and montane-alpine ones (Incurvaria vetulella,<br />
Lampronia rupella, Chioniodes viduellus, Sparganothis rubicundana, Clepsis<br />
steineriana, Clepsis rogana, Catoptria petrificella, Erebia epiphron, Erebia sudetica,<br />
Glacies alpinatus, Epichnopterix ardua and Xestia alpicolla), among them two endemic<br />
taxa (Erebia epiphron silesiana and Erebia sudetica sudetica), and therefore should be<br />
especially protected and their size maintained. The same holds for the small sites, because<br />
any decline in their area may be fatal for the species living here. The large sites in the<br />
Krkonose Mts. do not suffer an immediate threat, but even these should be closely<br />
monitored and actions performed in case of observed decline of their area and/or<br />
abundance of individual species here.<br />
Acknowledgements<br />
We thank Vaclav Treml for providing geographical data regarding timberline, site<br />
locations and situation map of the High Sudetes Mts. (Fig. 1). We are also obliged to Jan<br />
Liska for classifying species from the Krkonose-West and Krkonose-East. This research<br />
was funded by the Ministry of Environment of the Czech Republic (projects VaV<br />
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