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Sources of organochlorine contaminants and mercury in seabirds from the Aleutian archipelago of Alaska: inferences from spatial and trophic variation.
TLDR
Elevated levels of these contaminants and Hg, along with PCB congener and chlorinated pesticide compositional patterns detected at Buldir Island indicated exposure from distant sources influenced by a combination of atmospheric-oceanic processes and the migratory movements of seabirds. Expand
Survival of Columbian white-tailed deer in western Oregon
TLDR
The results suggest that CWTD may have responded to density-dependent factors during this short-term study, although the effects of other environmental or intrinsic factors cannot be ignored. Expand
Temporal and spatial distributions of sediment mercury at salt pond wetland restoration sites, San Francisco Bay, CA, USA.
  • A. Miles, M. Ricca
  • Environmental Science, Medicine
  • The Science of the total environment
  • 1 February 2010
TLDR
Differences in MeHg levels were related to water depth and pH, but these relationships were not consistent between years or among ponds and were viewed with caution. Expand
Environmental contaminants in bald eagle eggs from the Aleutian archipelago.
TLDR
Eggshell thickness and productivity of bald eagles were normal and indicative of healthy populations because concentrations of most contaminants were below threshold levels for effects on reproduction, and contaminant concentrations were not correlated with stable isotopes of carbon or nitrogen in eggs. Expand
Effect of lipid extraction on analyses of stable carbon and stable nitrogen isotopes in coastal organisms of the Aleutian archipelago
TLDR
Lower δ13C values in NLE samples were not correlated with lipid content within bald eagle eggs and blue mussels, but covaried positively with percent lipid in avian and fish muscles, and neither lipid extraction nor percent lipid significantly changed δ15N values for any sample type. Expand
Bald eagles and sea otters in the Aleutian Archipelago: indirect effects of trophic cascades.
TLDR
The results provide further evidence of the wide-ranging indirect effects of sea otter predation on nearshore marine communities and another apex predator, the Bald Eagle, and the food-web pathway transcended five species and several trophic levels in linking one apex predator to another. Expand
Pinyon and Juniper Encroachment into Sagebrush Ecosystems Impacts Distribution and Survival of Greater Sage-Grouse☆,☆☆
ABSTRACT In sagebrush (Artemisia spp.) ecosystems, encroachment of pinyon (Pinus spp.) and juniper (Juniperus spp.; hereafter, “pinyon-junipeR&Rdquo;) trees has increased dramatically since EuropeanExpand
Wildfire, climate, and invasive grass interactions negatively impact an indicator species by reshaping sagebrush ecosystems
TLDR
The results demonstrate that the cumulative loss of sagebrush to direct and indirect effects of wildfire has contributed strongly to declining sage-grouse populations over the past 30 y at large spatial scales, and provide a timely example of how altered fire regimes are disrupting recovery of Sagebrush ecosystems and leading to substantial declines of a widespread indicator species. Expand
SEXUAL SEGREGATION IN ROOSEVELT ELK: CROPPING RATES AND AGGRESSION IN MIXED-SEX GROUPS
TLDR
Sexual segregation was associated with behaviors of sexes in mixed-sex groups: reduced intake of forage by males and increased female–female aggression with more males. Expand
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