| trace elements exposure of endangered crested ibis (nipponia nippon) under in situ and ex situ conservations. | crested ibis (nipponia nippon), one of the rarest birds in the world, was almost extinct in the historically widespread areas partly due to the environmental pollution. therefore, non-invasive indicators of feather, eggshell, and excrement were used to investigate the exposure of this endangered bird to eleven trace elements in this study. the results indicated that crested ibises under in situ and ex situ conservations were diversely exposed to trace elements, with higher exposure levels of as, ... | 2019 | 31344541 |