Six years from passing bell to recovery: Habitat restoration of the threatened Chequered Blue Butterfly (Scolitantides orion) in SE Finland
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Published source details
Marttila O., Saarinen K. & Marttila P. (2000) Six years from passing bell to recovery: Habitat restoration of the threatened Chequered Blue Butterfly (Scolitantides orion) in SE Finland. Entomologica Fennica, 11, 113-117.
Published source details Marttila O., Saarinen K. & Marttila P. (2000) Six years from passing bell to recovery: Habitat restoration of the threatened Chequered Blue Butterfly (Scolitantides orion) in SE Finland. Entomologica Fennica, 11, 113-117.
Actions
This study is summarised as evidence for the following.
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Clear or open patches in forests Action Link |
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Clear or open patches in forests
A before-and-after study in 1987–1999 on a rocky island in South Karelia, Finland (Marttila et al. 2000) reported that following selected clearance of pine trees, chequered blue butterfly Scolitantides orion numbers increased. No statistical tests were carried out. In the three years prior to clearance around two chequered blue butterflies were recorded annually, later in the year of clearance none were recorded, and in the nine years after clearance 0–25 were recorded annually. In 1990, pines were selectively logged on the rocky outcrops and slopes of an island on Lake Saimaa, creating a patchy, open habitat. In 1990–1996 and 1998–1999 chequered blue abundance was estimated on long (2–5 hours) and short (≤ 30 minutes) surveys 1–3 times annually on days with good weather during the peak flight period. In June 1997, butterflies were monitored by an eight-day mark-recapture study. Authors reported that butterflies were also observed annually in 1987–1989 but provided no survey details.
(Summarised by: Eleanor Bladon)
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