Publications

rhabdometra alpinensis n.sp.(cestoda: paruterinida: dilepididea) from southern white-tailed ptarmigan (lagopus leucurus altipetens osgood) in colorado, u.s.a., with a key to the species of rhabdometra cholodkowsky, 1906.		1978	647529
two new species of coccidia, eimeria leucuri and e. oreoecetes (protozoa: eimeriidae), in grouse from colorado.	eimeria leucuri is described from white-tailed ptarmigan (lagopus leucurus), and e. oreoecetes from white-tailed ptarmigan and blue grouse (dendragapus obscurus) from colorado. oocysts of e. leucuri are ellipsoidal, 26.6 by 17.7 micron, each bearing a micropyle, micropyle cap, up to 4 polar granules, but no oocyst residuum. the lemon-shaped sporocysts are 15.4 by 6.7 micron, and have stieda bodies and large amounts of sporocyst residuum. the sporocyst contents are enclosed in a membrane. oocysts ...	1979	448611
cadmium toxicity among wildlife in the colorado rocky mountains.	cadmium is known to be both extremely toxic and ubiquitous in natural environments. it occurs in almost all soils, surface waters and plants, and it is readily mobilized by human activities such as mining. as a result, cadmium has been named as a potential health threat to wildlife species; however, because it exists most commonly in the environment as a trace constituent, reported incidences of cadmium toxicity are rare. here we have measured trace metals in the food web and tissues of white-ta ...	2000	10910356
signatures of large-scale and local climates on the demography of white-tailed ptarmigan in rocky mountain national park, colorado, usa.	global climate change may impact wildlife populations by affecting local weather patterns, which, in turn, can impact a variety of ecological processes. however, it is not clear that local variations in ecological processes can be explained by large-scale patterns of climate. the north atlantic oscillation (nao) is a large-scale climate phenomenon that has been shown to influence the population dynamics of some animals. although effects of the nao on vertebrate population dynamics have been stud ...	2002	12242476
effects of seasonal weather on breeding phenology and reproductive success of alpine ptarmigan in colorado.	animal populations occurring at high elevations are often assumed to be in peril of extinctions or local extirpations due to elevational-dispersal limitations and thermoregulatory constraints as habitats change and warm. however, long-term monitoring of high-elevation populations is uncommon relative to those occurring at lower elevations, and evidence supporting this assumption is limited. we analyzed 45 years of reproductive data for two colorado populations of white-tailed ptarmigan (lagopus ...	2016	27420478