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We have 6 results for Ecological Risk Assessment.
UPSTREAM-TO-DOWNSTREAM CHANGES IN NUTRIENT EXPORT RISK 1 Citation One of the early operating principles of landscape ecology was the importance of studying the movement of energy, nutrients, and biota in the horizontal or x,y plane (Risser et al. 1984). The new focus on horizontal movement was in part based on the recognition that many ecological studies had abstracted the horizontal domain (Reynolds and Wu 1999), Ecological risk assessment (O'Neill et al. 1982, Bartell et al. 1992, Suter 1993) emerged at about the same time as the field of landscape ecology,, technorati.com
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Selected Issues Associated with the Risk Assessment Process for ... 1 Citation Selected Issues Associated with the Risk Assessment Process for ... Recent Science Inventory records from the EPA Wed, 11/26/2008 - 12:58 This Scientific Advisory Panel meeting will address selected scientific issues associated with assessing the potential ecological risks resulting from use of a pesticide active ingredient which has persistent, bioaccumulative, and toxic (PBT) characteristics., technorati.com
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Framework for Application of the Toxicity Equivalence Methodolog... 1 Citation Polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), and biphenyls (PCBs) are commonly found as contaminants in complex mixtures in the environment. Several of these compounds bioaccumulate in the tissues of fish, birds, and mammals and have been shown to cause mortality and adverse effects on reproduction, development, and the immune system. read more, technorati.com
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Wildlife division killed twice as many animals in ?08 1 Citation GreenWire : The U.S. Department of Agriculture responsible for addressing wildlife conflicts doubled the number of animals it killed last year. USDA?s Wildlife Services revealed in its annual report today that it had killed more than 4.9 million animals during fiscal 2008, up from 2.4 million killed in the previous year, but the agency contends the change reflects more accurate accounting methods. More than 90 percent of all animals killed were crows, blackbirds, magpies and three invasive, technorati.com
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EVALUATING ECOLOGICAL RISK TO INVERTEBRATE RECEPTORS FROM PAHS I... 1 Citation In March 2004, ORD?s Ecological Risk Assessment Support Center (ERASC) received a request from the Ecological Risk Assessment Forum (ERAF) relating to the evaluation of ecological risk to vertebrate and benthic invertebrate receptors from polycyclic aromatic hydrocarbon compounds (PAHs) in sediment at hazardous waste sites. The External Review Draft addressing this request provides an overview of an approach for assessing risk to invertebrate receptors resulting from exposure to PAHs in contamin, technorati.com
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APPLICATION OF WATERSHED ECOLOGICAL RISK ASSESSMENT METHODS TO W... 1 Citation Watersheds are frequently used to study and manage environmental resources because hydrologic boundaries define the flow of contaminants and other stressors. Ecological assessments of watersheds are complex because watersheds typically overlap multiple jurisdictional boundaries, are subjected to multiple environmental stressors, and have multiple stakeholders with diverse environmental and socioeconomic interests. read more, technorati.com
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