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Differential Effects Of Canopy Trimming And Litter Deposition On Litterfall And Nutrient Dynamics In A Wet Subtropical Forest, Steven J. Hall, Whendee L. Silver, Grizelle González
Differential Effects Of Canopy Trimming And Litter Deposition On Litterfall And Nutrient Dynamics In A Wet Subtropical Forest, Steven J. Hall, Whendee L. Silver, Grizelle González
Steven J. Hall
Humid tropical forests have the highest rates of litterfall production globally, which fuels rapid nutrient recycling and high net ecosystem production. Severe storm events significantly alter patterns in litterfall mass and nutrient dynamics through a combination of canopy disturbance and litter deposition. In this study, we used a large-scale long-term manipulation experiment to explore the separate and combined effects of canopy trimming and litter deposition on litterfall rates and litter nutrient concentrations and content. The deposition of fine litter associated with the treatments was equivalent to more than two times the annual fine litterfall mass and nutrient content in control …
Lead Exposure From Aluminum Cookware In Cameroon, Jeffrey D. Weidenhamer, Peter A. Lobunski, Gilbert Kuepouo, Rebecca W. Corbin, Perry Gottesfeld
Lead Exposure From Aluminum Cookware In Cameroon, Jeffrey D. Weidenhamer, Peter A. Lobunski, Gilbert Kuepouo, Rebecca W. Corbin, Perry Gottesfeld
Jeffrey D. Weidenhamer
Blood lead levels have decreased following the removal of lead from gasoline in most of the world. However, numerous recent studies provide evidence that elevated blood lead levels persist in many low and middle-income countries around the world at much higher prevalence than in the more developed countries. One potential source of lead exposure that has not been widely investigated is the leaching of lead from artisanal aluminum cookware, which is commonly used in the developing world. Twenty-nine samples of aluminum cookware and utensils manufactured by local artisans in Cameroon were collected and analyzed for their potential to release lead …
A Spatially Explicit Model Of The Wild Hog For Ecological Risk Assessment Activities At The Department Of Energy's Savannah River Site, Karen F. Gaines, Dwayne E. Porter, Tracy Punshon, I. Lehr Brisbin Jr.
A Spatially Explicit Model Of The Wild Hog For Ecological Risk Assessment Activities At The Department Of Energy's Savannah River Site, Karen F. Gaines, Dwayne E. Porter, Tracy Punshon, I. Lehr Brisbin Jr.
Karen F. Gaines
In North America, wild hogs (Sus scrofa) are both sought after as prime game and despised due to their detrimental impacts to the environment from their digging and rooting behavior. They are also a potentially useful indicator species for environmental health for both ecological- and human-based risk assessments. An inductive approach was used to develop probabilistic resource selection models using logistic regression to quantify the likelihood of hogs being in any area of the Department of Energy’s 805 km2 Savannah River Site (SRS) in west-central South Carolina. These models were derived by using available SRS hog hunt data from 1993–2000 …