Comparison of bird communities in stands of introduced lodgepole pine and native Scots pine in Sweden

摘要: The introduced lodgepole pine (Pinus contorta) occupies more than 650 000 hectares in Sweden. There are some differences between and Scots sylvestris) forests which could affect bird assemblages, for example canopy density ground vegetation. Birds were surveyed 14 localities northern Sweden, each characterized by one middle-aged stand of next to a pine. two paired stands locality planted the forestry company SCA at same time similar environment evaluate potential In those localities, three point count stations established both stand, depending on size area. had radius 50 meters all birds seen or heard inside that (overflying excluded) counted four visits late May June. no significant total abundance species richness stands. A number 20 19 spotted flycatcher (Muscicapa striata) significantly higher chaffinch (Fringilla coelebs) nearly Two tendency be common forest: goldcrest (Regulus regulus) willow warbler (Phylloscopus trochilus), but not statistically significant. I conclude recorded large enough numbers statistical analyses probably negatively affected scale, further studies would required assess breeding success sensitive resident habitats before any definite conclusions can drawn.