| stable isotopes in breath, blood, feces and feathers can indicate intra-individual changes in the diet of migratory songbirds. | we used stable isotopes of c in breath, blood, feces and feathers to identify intra-individual changes in diet and the timescale of diet changes in free-living songbirds at a stopover site. because accurate interpretation of differences between the delta13c of breath, plasma, and red blood cells (rbcs) relative to diet requires knowing the turnover rate of c within them, we determined the rate of change of c in breath, plasma and rbcs for yellow-rumped warblers (dendroica coronata). half-lives o ... | 2005 | 15586297 |
| sea to sky: impacts of residual salmon-derived nutrients on estuarine breeding bird communities. | pacific salmon (oncorhynchus spp.) returning to streams around the north pacific rim provide a nutrient subsidy to these ecosystems. while many species of animals feed directly on salmon carcasses each autumn, salmon-derived nutrients can also be stored in coastal habitats throughout the year. the effects of this storage legacy on vertebrates in other seasons are not well understood, especially in estuaries, which can receive a large portion of post-spawning salmon nutrients. we examine the effe ... | 2011 | 21325324 |