INVERTEBRATE COMMUNITIES IN BOREAL FOREST CANOPIES AS INFLUENCED BY FORESTRY AND LICHENS WITH IMPLICATIONS FOR PASSERINE BIRDS
INVERTEBRATE COMMUNITIES IN BOREAL FOREST CANOPIES AS INFLUENCED BY FORESTRY AND LICHENS WITH IMPLICATIONS FOR PASSERINE BIRDS
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DOI：
10.1016/0006-3207(95)00015-v
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发表时间：
1995-01-01
影响因子：
5.9
通讯作者：
SJOBERG, K
中科院分区：
文献类型：
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作者：
PETTERSSON, RB;BALL, JP;SJOBERG, K
为了调查商业林业对北方森林树冠生活无脊椎动物的影响，我们在瑞典北方对天然云杉林和相邻的管理森林进行了选择性采伐，并在无脊椎动物丰度最低的冬末进行了研究，当微小的差异可能对觅食的鸟类至关重要时，天然林的无脊椎动物多样性比管理林要大得多，每个分支的无脊椎动物数量几乎是管理林的五倍。大型无脊椎动物（> 25毫米，觅食雀形目鸟类的最小猎物大小）的数量在天然森林中一直较高，蜘蛛（蜘蛛目），鳞翅目和双翅目幼虫占主导地位。无脊椎动物的数量和生物量与地衣的丰度相关，即使控制采样位置和分支大小。其他研究表明，在北方欧洲的非迁徙雀形目鸟类的下降，通过森林的破坏和破碎化，林业，但我们的研究表明，它也可能会降低觅食栖息地的质量，通过减少地衣丰富。
To investigate the effects of commercial forestry, on canopy-living invertebrates in the boreal forest, we sampled branches in northern Sweden for invertebrates and lichens from paired natural spruce Picea abies forests and adjacent managed forests that were selectively logged The study was conducted during late winter, when invertebrate abundance is lowest, and when small differences may be critical to foraging birds.Natural forests had significantly gr eater invertebrate diversity than managed forests and nearly five times as many invertebrates per branch. The number of large invertebrates (> 25 mm, the minimum prey size for foraging passerine birds) was consistently higher in natural forests, with spiders (Araneae), Lepidoptera and Diptera larvae dominating. The number and biomass of invertebrates were related to the abundance of lichens even after controlling for sampling location and branch size. Other studies have implicated forestry in the decline of nonmigratory passerine birds in northern Europe through the destruction and fragmentation of forests, but our study indicates that it may also reduce foraging habitat quality through a reduction in lichen abundance.