Landscape structure and plague occurrence in black-tailed prairie dogs on grasslands of the western USA

被引:94
作者
Collinge, SK
Johnson, WC
Ray, C
Matchett, R
Grensten, J
Cully, JF
Gage, KL
Kosoy, MY
Loye, JE
Martin, AP
机构
[1] Univ Colorado, Dept Ecol & Evolutionary Biol, Boulder, CO 80309 USA
[2] Univ Colorado, Environm Studies Program, Boulder, CO 80309 USA
[3] Bur Land Management, Malta Field Off, Malta, MT 59538 USA
[4] US Fish & Wildlife Serv, Charles M Russell Natl Wildlife Refuge, Lewistown, MT 59457 USA
[5] Kansas State Univ, US Geol Survey, Kansas Cooperat Fish & Wildlife Res Unit, Manhattan, KS 66506 USA
[6] Ctr Dis Control, Bacterial Zoonoses Branch, Div Vector Borne Infect Dis, Ft Collins, CO 80522 USA
[7] Univ Calif Davis, Dept Entomol, Davis, CA 95616 USA
基金
美国国家环境保护局;
关键词
Colorado; disease; grasslands; habitat fragmentation; landscape context; Montana; plague; prairie dogs; rodents; urbanization;
D O I
10.1007/s10980-005-4617-5
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Landscape structure influences the abundance and distribution of many species, including pathogens that cause infectious diseases. Black-tailed prairie dogs in the western USA have declined precipitously over the past 100 years, most recently due to grassland conversion and their susceptibility to sylvatic plague. We assembled and analyzed two long-term data sets on plague occurrence in black-tailed prairie dogs to explore the hypotheses that plague occurrence is associated with colony characteristics and landscape context. Our two study areas (Boulder County, Colorado, and Phillips County, Montana) differed markedly in degree of urbanization and other landscape characteristics. In both study areas, we found associations between plague occurrence and landscape and colony characteristics such as the amount of roads, streams and lakes surrounding a prairie dog colony, the area covered by the colony and its neighbors, and the distance to the nearest plague-positive colony. Logistic regression models were similar between the two study areas, with the best models predicting positive effects of proximity to plague-positive colonies and negative effects of road, stream and lake cover on plague occurrence. Taken together, these results suggest that roads, streams and lakes may serve as barriers to plague in black-tailed prairie dog colonies by affecting movement of or habitat quality for plague hosts or for fleas that serve as vectors for the pathogen. The similarity in plague correlates between urban and rural study areas suggests that the correlates of plague are not altered by uniquely urban stressors.
引用
收藏
页码:941 / 955
页数:15
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