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Journal of Avian Biology
Article . 1994 . Peer-reviewed
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Habitat Quality for Raptors: A Field Experiment

Authors: Per Widen;

Habitat Quality for Raptors: A Field Experiment

Abstract

A major factor influencing the quality of raptor habitats is food availability, which is determined not only by prey density, but also by various habitat features influencing the accessibility of prey. Many raptors hunt ground-living prey by using the energysaving pause-travel search tactic. If perches to hunt from are lacking, a habitat may be difficult to exploit even if prey is abundant, hence perches are an important component of prey availability. The boreal forest landscape is drastically changed by very intensive forest management. Clearcuts, where mature forest has been harvested, are rich in prey (rodents) but lack perches. An experiment was performed to test if abundance of perches is a factor limiting the utilization of these habitats by foraging raptors. Eleven clearcuts were provided with man-made perches, and 11 clearcuts served as control. Foraging raptors used clearcuts with perches significantly more than clearcuts lacking perches, and raptor utilization changed accordingly when the control and experimental areas were switched.

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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
53
Top 10%
Top 10%
Average
gold