Road Ecology Center - UC Davis
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Directional acoustic radiation in the strut display of male sage grouse Centrocercus urophasianus

Dantzker, Marc S. Deane, Grant B. Bradbury, Jack W.

We present evidence that the acoustic component of the strut display of male sage grouse Centrocercus urophasianus is highly directional and that the nature of this directionality is unique among measured vertebrates. Where vertebrate acoustic signals have been found to be directional, they are most intense anteriorly and are bilaterally symmetrica...

Cars, Cows, and Checkerspot Butterflies: Nitrogen Deposition and Management of Nutrient-Poor Grasslands for a Threatened...

Weiss, Stuart B.

Nutrient-poor, serpentinitic soils in the San Francisco Bay area sustain a native grassland that supports many rare species, including the Bay checkerspot butterfly (Euphydryas editha bayensis). Nitrogen (N) deposition from air pollution threatens biodiversity in these grasslands because N is the primary limiting nutrient for plant growth on serpen...

Effect of road traffic on amphibian density

Wegner, John F. Fahrig, Lenore Pedlar, John H. Pope, Shealagh E. Taylor, Philip D.

We studied the effect of traffic intensity on local abundance of anurans. We counted dead and live frogs and toads per km and estimated frog and toad local abundances using breeding chorus intensities on similar roads through similar habitats, but with different levels of traffic intensity. After correcting for effects of date, local habitat, time,...

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