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Science 23 November 2007:
Vol. 318. no. 5854, p. 1239
DOI: 10.1126/science.318.5854.1239a
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Letters
How to Submit a Letter to the Editor
Technical Comment Abstracts
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COMMENT ON "Roadless Space of the Conterminous United States"
Evan H. Girvetz, Jochen A. G. Jaeger, James H. Thorne
Abstract: Watts et al. (Reports, 4 May 2007, p. 736) introduced a metric of landscape pattern called roadless volume (RV). However, as with most previous metrics, RV does not explicitly address ecological processes. We demonstrate that RV can produce results inconsistent with the notion of landscape connectivity and contend that more ecologically relevant metrics are available.
Full text at www.sciencemag.org/cgi/content/full/318/5854/1240b
RESPONSE TO COMMENT ON "Roadless Space of the Conterminous United States"
Raymond D. Watts, Roger W. Compton, John H. McCammon, Carl L. Rich, Stewart M. Wright, Tom Owens, Douglas S. Ouren
Abstract: Girvetz et al. criticize our work and the value of the roadless volume (RV) metric, basing their arguments on the artificial imposition of wildlife habitat connectivity as the context. We counter that in our intended contexts, both practical and geographic theoretical considerations make RV an appropriate measure of the space between roads.
Full text at www.sciencemag.org/cgi/content/full/318/5854/1240c
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