• Publications
  • Influence
Adverse effects from environmental mercury loads on breeding common loons
The common loon is used as an upper trophic level bioindicator of aquatic Hg toxicity in freshwater lakes to measure significant changes related to elevated MeHg body burdens, including aberrant incubation behavior, lethargy, and wing area asymmetry. Expand
Patterns and Interpretation of Mercury Exposure in Freshwater Avian Communities in Northeastern North America
Differences in Hg exposure among species are primarily correlated with trophic position and availability of MeHg, and those among species exhibiting sexual dimorphism and niche partitioning are of interpretive concern. Expand
Biological Mercury Hotspots in the Northeastern United States and Southeastern Canada
ABSTRACT Biological mercury (Hg) hotspots were identified in the northeastern United States and southeastern Canada using a data set of biotic Hg concentrations. Eight layers representing three majorExpand
Mercury Contamination in Forest and Freshwater Ecosystems in the Northeastern United States
ABSTRACT Eastern North America receives elevated atmospheric mercury deposition from a combination of local, regional, and global sources. Anthropogenic emissions originate largely from electricExpand
Mercury Exposure Affects the Reproductive Success of a Free-Living Terrestrial Songbird, the Carolina Wren (Thryothorus ludovicianus)
This is the first field study to document the effect of specific adult songbird blood mercury concentrations on breeding performance; the results show that free-living songbirds can suffer negative reproductive effects at relatively low mercury concentrations. Expand
Mercury Concentrations in Bicknell’s Thrush and Other Insectivorous Passerines in Montane Forests of Northeastern North America
The finding of a correlation between regional litterfall Hg flux patterns and Bicknell’s thrush blood Hg concentrations demonstrates on-site availability of MeHg, and is recommended to assess risk to insectivorous passerines, particularly the Bicarus bicknelli. Expand
Common Loon Eggs as Indicators of Methylmercury Availability in North America
With few exceptions, loon eggs are suitable indicators of methylmercury availability on lakes with territorial pairs and are found to have the greatest risk levels in northeastern North America. Expand
Geographic trend in mercury measured in common loon feathers and blood
The common loon (Gavia immer) is a high-trophic-level, long-lived, obligate piscivore at risk from elevated levels of Hg through biomagnification and bioaccumulation. From 1991 to 1996 feather (n =Expand
Patterns of common loon (Gavia immer) mercury exposure, reproduction, and survival in Wisconsin, USA
No relationship was observed between levels of adult Hg exposure and reproductive performance or annual adult return rates (an index of survival); however, chick production was lower at lakes where chick blood Hg concentrations were elevated. Expand
Avian mercury exposure and toxicological risk across western North America: A synthesis.
Results indicate that mercury contamination of birds is prevalent in many areas throughout western North America, and large-scale ecological attributes are important factors influencing bird mercury concentrations. Expand