Heidi N. Geisz

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The Ecosystems Center, MBL, Woods Hole, MA, USA British Antarctic Survey, Cambridge, UK Virginia Instute of Marine Science, College of William and Mary, Gloucester Point, VA, USA Woods Hole Oceanographic Institution, Woods Hole, MA, USA Princeton University, Princeton, NJ, USA Lamont-Doherty Earth Observatory, Palisades, NY, USA MIT-WHOI Joint Program in(More)
Persistent organic pollutants reach polar regions by long-range atmospheric transport and biomagnify through the food web accumulating in higher trophic level predators. We analyzed Adélie penguin (Pygoscelis adeliae) samples collected from 2004 to 2006 to evaluate current levels of sigmaDDT (p,p'-DDT + p,p'-DDE) in these birds, which are confined to(More)
As filter-feeding planktivores, Atlantic menhaden (Brevoortia tyrannus) have the potential to positively impact water quality through the filtration and ingestion of phytoplankton and the assimilation of nutrients. To evaluate the impact of young-of-theyear (YOY) and age-1+ menhaden on Chesapeake Bay, a eutrophic estuary, age-specific rates of ingestion of(More)
Historical persistent organic pollutants (POPs) are banned from Antarctica under international treaty; but contemporary-use POPs can enter as additives within polymer and textile products. Over their useful lives these products may release additives in-situ. Indeed, we observed 226 and 109 ng/g dry weight (dw) of the total concentrations of α-, β- and(More)
The Southern giant petrel (Macronectes giganteus) is declining over much of its range and currently is listed as vulnerable to extinction by the International Union for the Conservation of Nature (IUCN). Island-specific breeding colonies near Palmer Station, Antarctica, have been monitored for over 30 years, and because this population continues to(More)
Persistent organic pollutants (POPs), contaminants that may bioaccumulate in upper trophic level organisms, were detected in the milk of a top predator, the Antarctic fur seal (Arctocephalus gazella). Multiparous females had significantly lower concentrations of certain POPs (trans-nonachlor, p,p'-DDE, and several PCBs) in their milk than primiparous(More)
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