In the Swiss Alps, traditionally cultivated grasslands are known to
be species rich in Orthoptera and Lepidoptera. Due to the ongoing
abandonment or the intensification of management across the Alpine
arc these extensively managed grasslands are decreasing and
becoming of high conservation interest. Up to now, information has
been scarce regarding the consequences of these changes on
grasshopper and butterfly diversity in the grasslands of the Alps.
Because Orthoptera and Lepidoptera react sensitively to habitat
changes, we studied these two taxa in intensively and extensively
managed meadows and in lightly grazed pastures in two valleys of
the Swiss Alps; Grindelwald (BE) and Tavetsch (Tujetsch, GR). The
study aimed to document changes in grasshopper and butterfly
communities over the last three decades using historical data. We
wanted to assess potential causes for observed changes and to
determine the importance of grassland management for the
conservation of grasshoppers and butterflies in the Swiss Alps.
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