| stable isotopes as indicators of altitudinal distributions and movements in an ecuadorean hummingbird community. | altitudinal migration and dispersal is an important component of the life history of several temperate and tropical birds but remains poorly understood due to the limited success of mark and recapture techniques. stable isotopes of hydrogen (deltad) in rainfall, and to a lesser extent, carbon (delta13c) in plants are known to change with altitude and hence may provide the basis of a technique for tracking the altitudinal movements in birds and other wildlife. we investigated the potential for th ... | 2003 | 12756525 |