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- W229355782 abstract "Previous research on response by grizzly bears to roads has been confined to interactions with tertiary or unimproved road systems. To the authors knowledge no information exists to evaluate the potential of high-speed, high-volume highways to disrupt or prevent grizzly bear movement. The authors know of no other area within occupied grizzly bear habitat in North America that has such an extensive network of high-speed, high-volume highways. Between 1994 and 1998 the authors captured and radio-marked grizzly bears in the Bow River Watershed, Alberta, and monitored their movements. Using radio telemetry data the authors documented the permeability of several highways to grizzly bear movement in a landscape where human presence is widespread. One highway with 24-hour, year-round high traffic volumes served as an effective barrier for adult female movement. Traffic volume appeared to be a key variable in the permeability of highways for grizzly bears. Highway crossings by grizzly bears were concentrated in specific locations and occurred during night as well as day. The authors analysis demonstrates grizzly bears cross some highways in very site-specific locations, enabling the authors to predict crossing zones. Zones of high frequency road crossings in this study area were characterized by lower than average total access density, closer to a major drainage, more rugged terrain and higher quality habitat. Significant potential currently exists for permanent habitat and population fragmentation to occur along the Trans Canada Highway. An adaptive management approach will be crucial, with population connectivity being of paramount importance, as the authors continue to gain knowledge of grizzly bear response to highways." @default.
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- W229355782 date "2001-09-24" @default.
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- W229355782 title "Effects of Highways on Grizzly Bear Movement in the Bow River Watershed, Alberta, Canada" @default.
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