O. R. J. Anderson

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Seabirds are often advocated as biomonitors for marine contaminants such as mercury (Hg). However, contaminant levels can vary widely depending on among-individual and amongspecies variation in foraging preferences and physiology, and on tissue types used for analyses. Using stable isotope analysis (SIA), we investigated the effects of trophic position,(More)
The diet of brown skuas (Catharacta antarctica lonnbergi) on Bird Island, South Georgia was assessed using a combination of stable isotope analysis (SIA) and mixing model techniques. We found evidence that individual specialisation in diet of adult brown skuas was related to timing of breeding, which may reflect differences in intrinsic quality. Adults with(More)
We investigated the concentrations of 22 essential and non-essential elements among a community of Procellariiformes (and their prey) to identify the extent to which trophic position and foraging range governed element accumulation. Stable isotope analysis (SIA) was used to characterise trophic (delta(15)N) and spatial patterns (delta(13)C) among species.(More)
  • Lucille Pipkin, Ronald F. Broadhead, +28 authors FRANK E. KOTTLOWSKI
  • 2015
The Estancia Basin of central New Mexico is an asymmetric, north—south-trending structural depression that originated during the Pennsylvanian. The present-day basin covers 1,500 mi and is defined approximately by the Estancia Valley. It is bounded on the east by the late Paleozoic Pedernal uplift, on the west by the Tertiary-age Sandia, Manzano, and Los(More)
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