Várkonyi Gergely, Kuussaari Mikko, Lappalainen Harri
Kainuu Regional Environment Centre, Research Centre of Friendship Park, Tönölä, 88900, Kuhmo, Finland.
Oecologia. 2003 Nov;137(3):466-74. doi: 10.1007/s00442-003-1354-9. Epub 2003 Aug 9.
We studied movements of the noctuid moths Xestia speciosa and X. fennica in a fragmented forest landscape including old-growth spruce forest corridors in eastern Finland. We individually marked and released 1,796 adults of the habitat generalist X. speciosa and 683 individuals of X. fennica, which prefers old-growth spruce forests. Moths were recaptured with 60 sugar-bait traps that were placed within habitat corridors, in the non-habitat matrix and in surrounding old-growth forest patches. Both species favoured the corridors during their movements and tended to avoid entering the matrix. We analysed recapture rates and movements of the recaptured moths. Results suggest that X. speciosa moves longer distances than X. fennica. Though corridors clearly canalized movements by both species, the impact of old-growth forest corridors at the larger landscape scale was less clear in X. fennica. Movement behaviour of the two sexes differed more than that of the two species.
我们在芬兰东部一片破碎化的森林景观中研究了夜蛾Xestia speciosa和X. fennica的活动情况，该景观包括原始云杉林走廊。我们分别标记并放飞了1796只栖息地泛化种X. speciosa的成虫和683只偏好原始云杉林的X. fennica个体。通过放置在栖息地走廊、非栖息地基质和周围原始森林斑块中的60个糖饵诱捕器来重新捕获蛾子。两种蛾子在活动时都偏爱走廊，并且倾向于避免进入基质。我们分析了重新捕获率以及重新捕获蛾子的活动情况。结果表明，X. speciosa比X. fennica移动的距离更远。尽管走廊明显引导了两种蛾子的活动，但在更大的景观尺度上，原始云杉林走廊对X. fennica的影响不太明显。两性的活动行为差异比两个物种之间的差异更大。
