Ecological Risk Assessment Issue PapersProvides scientific & technical information that scientists can use along with other materials to develop ecological risk assessment guidance. Highlights important principles & approaches relevant to the ecological risk assessment framework that scientists should consider in preparing guidelines. Covers: biological stressors, ecological recovery, exposures characteristics, & much more. Figures & tables. |
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Häufige Begriffe und Wortgruppen
activities agent altered analysis application approach aquatic assessor associated biological birds chapter characteristics characterization chemical complex components concentrations conceptual model concerning considerations considered contaminants decision defined described determine direct discussed distribution disturbance dynamics ecological effects ecological risk assessment ecological significance ecosystem effects endpoints environment environmental established estimates evaluation example experiments exposure factors field Figure fish forest framework function given habitat human impacts important increase indicate individual influence integration interactions introduced involves issue laboratory limited measurement methods natural nutrient occur organisms parameters particular physical plant population possible potential predict probability problem production Protection range rates recovery reduced regions relationships represent Research resource response result scale selection significance soil spatial species statistical stream stress stressor structure studies temporal toxicity types uncertainty values variability
Beliebte Passagen
Seite 3-47 - Unreasonable adverse effects on the environment. — The term "unreasonable adverse effects on the environment" means any unreasonable risk to man or the environment, taking into account the economic, social, and environmental costs and benefits of the use of any pesticide.
Seite ii - This document has been reviewed in accordance with US Environmental Protection Agency policy and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
Seite 8-13 - But the more fundamental conception is, as it seems to me, the whole system (in the sense of physics), including not only the organism-complex, but also the whole complex of physical factors forming what we call the environment of the biome — the habitat factors in the widest sense.
Seite 8-13 - It is the systems so formed which, from the point of view of the ecologist, are the basic units of nature on the face of the earth. . . . These ecosystems, as we may call them, are of the most various kinds and sizes. They form one category of the multitudinous physical systems of the universe, which range from the universe as a whole down to the atom.
Seite 8-13 - Though the organisms may claim our primary interest. when we are trying to think fundamentally we cannot separate them from their special environment. with which they form one physical system. It is the systems so formed which. from the point of view of the ecologist. are the basic units of nature on the face of the earth — These ecosystems.
Seite 5-84 - GT. 1991. The contribution of ammonia, metals and nonpolar organic compounds to the toxicity of sediment interstitial water from an Illinois river tributary.
Seite 5-75 - JW. 1990. Identification of ammonia as an important sediment-associated toxicant in the lower Fox River and Green Bay, Wisconsin.
Seite 10-36 - An Ecosystem Approach to the Integrity of the Great Lakes in Turbulent Times.
Seite 4-60 - A disturbance is any relatively discrete event in time that disrupts ecosystem, community, or population structure and changes resources, substrate availability, or the physical environment.
Seite 5-78 - Ability of standard toxicity tests to predict the effects of the insecticide diflubenzuron on laboratory stream communities

