NDLI: Riparian vegetation loss, stream channelization, and web-weaving spiders in northern Japan

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Riparian vegetation loss, stream channelization, and web-weaving spiders in northern Japan

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Acknowledgment to reviewers

Ecological Research : Volume 20, Issue 5, September 2005

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Ecological Research : Volume 19

Ecological Research : Volume 18

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Ecological Research : Volume 14

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Ecological Research : Volume 12

Riparian vegetation loss, stream channelization, and web-weaving spiders in northern Japan

Content Provider	Springer Nature Link
Author	Laeser, Scott R. Baxter, Colden V. Fausch, Kurt D.
Copyright Year	2005
Abstract	Removal of riparian vegetation and straightening of stream channels (channelization) are the most prevalent forms of habitat degradation in streams and their riparian zones. Both have direct effects on organisms in the habitats where they occur, but also have potential to cause indirect effects by interrupting the flux of invertebrate prey between the two adjacent ecosystems. We measured abundance of web-building riparian spiders along four types of streams in Hokkaido, Japan: relatively undisturbed streams, streams where riparian vegetation had been removed, previously channelized streams where the banks had revegetated, and streams that had been both channelized and had the vegetation removed. Spider abundance was reduced by 70% or more by either habitat disturbance alone, or both combined, and the number of spider families was also reduced. Spiders of the family Tetragnathidae, which specialize in capturing adult insects emerging from streams, were strongly reduced by either form of habitat degradation alone, or in combination. In contrast, abundance of spiders in other families that capture prey from both terrestrial and aquatic sources was reduced more strongly by vegetation loss than channelization. These results indicate that riparian vegetation loss has strong direct effects on spiders by reducing habitat for web sites. They also suggest that channelization can have strong indirect effects on riparian-specialist tetragnathid spiders, probably by reducing the flux of adult aquatic insects from the stream to the riparian zone.
Starting Page	646
Ending Page	651
Page Count	6
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	20
Issue Number	6
e-ISSN	14401703
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-06-18
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Habitat degradation Indirect effects Prey subsidies Riparian vegetation Spiders
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Riparian vegetation loss, stream channelization, and web-weaving spiders in northern Japan

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Riparian vegetation loss, stream channelization, and web-weaving spiders in northern Japan