NDLI: Bark-dwelling spider assemblages (Araneae) in the boreal forest: dominance, diversity, composition and life-histories

Content Provider	Springer Nature Link
Author	Pinzón, Jaime Spence, John R.
Copyright Year	2010
Abstract	We collected spiders from tree-bark, foliage and litter habitats in deciduous and conifer dominated stands in NW Alberta (Canada) to define these assemblages and consider their conservation significance. To establish habitat associations, we used Indicator Species Analysis (ISA) together with a species dominance metric (DV′) newly proposed here. Of the 116 species collected, 78 were collected from bark. Results support categorizing 16 species as true bark-dwellers, 16 as facultative bark-dwellers and 46 as accidental bark-dwellers or species of unknown association. Species that were strong indicators of particular microhabitats in analyses restricted to bark habitats lost their indicator value when foliage and ground habitats were also considered, suggesting that bark habitats are critical for specific life-history functions. Clubiona canadensis Emerton 1980, Callobius nomeus (Chamberlin 1919), Pocadicnemis americana Millidge 1976 and Enoplognatha intrepida (Sørensen 1888) were the most common bark-dwelling species but their dominance varied among forest cover-types and trapping techniques. Collecting period, forest cover-type, habitat, and trapping technique were generally important environmental variables influencing composition of bark-dwelling assemblages. Although less important in structuring assemblages, tree status (dead or alive) and decay class were important for particular species. Bark habitats are crucial for boreal forest spider assemblages and must be considered central to maintenance of spider diversity.
Starting Page	439
Ending Page	458
Page Count	20
File Format	PDF
ISSN	1366638X
Journal	Journal of Insect Conservation
Volume Number	14
Issue Number	5
e-ISSN	15729753
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-02-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mixedwood Habitat association Species dominance Species composition Indicator species EMEND Life Sciences Animal Ecology Entomology Conservation Biology/Ecology Biodiversity
Content Type	Text
Resource Type	Article
Subject	Ecology Animal Science and Zoology Nature and Landscape Conservation Insect Science

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