| heavy metals and metalloids in egg contents and eggshells of passerine birds from arizona. | concentrations of inorganic elements were determined in eggs of passerine birds including the endangered southwestern willow flycatcher (empidonax traillii extimus) from four regions in arizona. the main aim of the study was to determine the distribution of metals in egg contents and eggshells, with emphasis on the deposition of sr in eggshells. seventy eggs of 11 passerine species were collected at four nesting locations during 2000. aluminum, ba, cr, cu, mn, se, sr, and zn, were detected prima ... | 2003 | 12826417 |
| the distribution and extent of heavy metal accumulation in song sparrows along arizona's upper santa cruz river. | heavy metals are persistent environmental contaminants, and transport of metals into the environment poses a threat to ecosystems, as plants and wildlife are susceptible to long-term exposure, bioaccumulation, and potential toxicity. we investigated the distribution and cascading extent of heavy metal accumulation in southwestern song sparrows (melospiza melodia fallax), a resident riparian bird species that occurs along the us/mexico border in arizona's upper santa cruz river watershed. this st ... | 2014 | 24729180 |