Individual study: Wirkungskontrolle von Verbindungsstrukturen. Teilbericht innerhalb der Sonderuntersuchung zur Wochenstube der Kleinen Hufeisennase in Friedrichswalde-Ottendorf / Sachsen.
Britschgi A., Theiler A. & Bontadina F. (2004) Wirkungskontrolle von Verbindungsstrukturen. Teilbericht innerhalb der Sonderuntersuchung zur Wochenstube der Kleinen Hufeisennase in Friedrichswalde-Ottendorf / Sachsen.
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Divert bats to safe crossing points with plantings or fencing
A controlled, before-and-after study in 2003 of a bat roost in an agricultural area of Giswil, Switzerland (Britschgi et al 2004) found that significantly more lesser horseshoe bats Rhinolophus hipposideros exiting from the roost from one side flew in a particular direction after an artificial hedgerow was installed. The number of bats flying in a particular direction increased after an artificial hedgerow had been installed for over two weeks (before: average 3% of bats; after: 10% of bats). Bats flying along the artificial hedgerow were found to emerge earlier from the roost and return later than bats using other flight routes and were out of the roost for longer (up to 4 minutes more). The artificial hedgerow (1 m wide x 1.5–2 m high x 200 m long) consisted of native hedgerow plants in containers. It was placed through open farmland to connect the bat roost with a foraging habitat within forest. The experiment was split into phases of 4–5 nights, with one phase each for before and after control periods, and 6 experimental phases with the artificial hedgerow in place. Bat activity was monitored with bat detectors and infra-red video cameras for >50 minutes at sunset and sunrise for 39 nights in July–September 2003.