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Transportation impacts to wildlife on state route 37 in northern San Pablo Bay, California

Transactions of the Western Section of the Wildlife Society

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Abstract

State Route 37 bisects conservation lands managed by San Pablo Bay National Wildlife Refuge (U.S. Fish & Wildlife Service) and Napa-Sonoma Marshes Wildlife Area (California Department of Fish and Game) in Solano and Sonoma Counties. The 2-lane highway connects Interstates 101 and 80 in northern San Francisco Bay and experiences ~26,000 vehicles per day. Road-killed wildlife between Napa River and Tolay Creek bridges (14.7 km) were counted in 2000 to ascertain species composition, relative abundance, and relative occurence (animal fatality interval). The primary objectives of the study were to determine if endangered salt marsh harvest mice (Reithrodontomys raviventris), California clapper rails (Rallus longirostris), or other species of concern were represented, and to collect baseline data on transportation impacts to wildlife in the area. During 51 surveys, 291 dead birds (54.6%) and mammals (45.4%) were observed. Endangered species were not positively identified dead on the highway. In total, 28 bird, 10 mammal and 1 reptile species were positively identified along this section of highway that traverses tidal marsh and diked baylands (i.e., salt ponds, seasonal wetlands, and oat-hay agriculture fields). The mean animal fatality interval for both lanes was one road-kill every 2.1km (2.1 km SD).

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Transportation impacts to wildlife on state route 37 in northern San Pablo Bay, California
Series title:
Transactions of the Western Section of the Wildlife Society
Volume:
37
Year Published:
2002
Language:
English
Publisher:
Wildlife Society 2001, Volume 37
Contributing office(s):
Western Ecological Research Center
Description:
6 p.
First page:
55
Last page:
60