| arthropod vectors and vector-borne bacterial pathogens in yosemite national park. | ticks, fleas, and vector-borne pathogens were surveyed in diverse small mammals in yosemite national park, california, from 2005 to 2007. a total of 450 unique captures of small mammals was collected during a 3-yr period and yielded 16 species of fleas and 10 species of ticks, including known vectors of anaplasma phagocytophilum and borrelia burgdorferi and plague. serology was performed for a. phagocytophilum, spotted fever group rickettsia spp., b. burgdorferi, and yersinia pestis. a. phagocyt ... | 2011 | 21337955 |
| eimeria beldingii n. sp. and other coccidia (apicomplexa) of the ground squirrel spermophilus beldingi. | fecal samples of 36 ground squirrels, spermophilus beldingi, from tioga pass (elev. ca. 3315 m) in the sierra nevada, california, yielded oocysts of eimeria beckeri in nine squirrels, e. citelli in four squirrels, e. beldingii n. sp. in two squirrels, and degenerated, unidentifiable oocysts in ten squirrels. eimeria beldingii n. sp. oocysts are ellipsoidal, 30-34 x 24-30 (mean 32 x 26) micron with a two-layered, rough, striated wall, without a micropyle or residuum, with polar granules; they con ... | 1984 | 6470992 |
| anthropogenic refugia ameliorate the severe climate-related decline of a montane mammal along its trailing edge. | we conducted detailed resurveys of a montane mammal, urocitellus beldingi, to examine the effects of climate change on persistence along the trailing edge of its range. of 74 california sites where u. beldingi were historically recorded (1902-1966), 42 per cent were extirpated, with no evidence for colonization of previously unoccupied sites. increases in both precipitation and temperature predicted site extirpations, potentially owing to snowcover loss. surprisingly, human land-use change buffe ... | 2012 | 22896652 |