Ecological Modeling in Risk Assessment - Chapter 7 pptx

... (Figure 7. 2 ). RAMAS Metapop/GIS then combines the information in all these map layers into a map of habitat suitability expressed as a user-defined habitat suitability function. 1 574 CH 07. fm Page ... model currently being developed (UFZ and OFFIS 2000) In this chapter, we also included individual-based population models that have a strong spatial component. Thus, in this chap...

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... Press, London. Ginzburg, L.R. and H.R. Akçakaya. (in press). Science and management investments needed to enhance the use of ecological modeling in decision-making. In Ecological Modeling for Environmental ... density dependence in fish population modeling (see for example Oines et al. 19 97; Root and Akçakaya 19 97; Root et al. 19 97) . CASE STUDY Introduction Using popula...

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... Number 1-5 6 67 0-5 7 4-6 Library of Congress Card Number 2001038 278 Printed in the United States of America 1 2 3 4 5 6 7 8 9 0 Printed on acid-free paper Library of Congress Cataloging -in- Publication ... references. ISBN 1-5 6 67 0-5 7 4-6 (alk. paper) 1. Pollution—Environmental aspects—Simulation methods. 2. Ecological risk assessment. I. Pastorok, Robert A....

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... it. Relevance — HIGH — Possible endpoints include expected population size (age- or stage-specific), risk of decline, risk of extinction, and expected crossing time (the time at which the population ... is included. Relevance — HIGH — Possible endpoints include expected population size (age- or stage-specific), lambda, lambda-based measures such as sensitivity and elasticity, and risk...

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... generally interacts with other species in feeding relationships, either feeding on other species, being fed upon by other species, or both. Second, a receptor of concern in an ecological risk assessment ... food-web modeling incorporating the effects of toxic chemicals Spencer and Ferson (1997a,c); Spencer et al. (1999) http://www.ramas.com/ Populus Software for population and...

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... model are relevant to ecological risk assessment. The examination of direct and indirect effects of stressors (e.g., entrain - ment) is of high interest in ecological risk assessment. Although ... LEEM was initiated by the International Joint Commission to aid in anticipating the effects of declining nutrient loading, invasion of zebra mussels, loading of toxic organic con...

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... capabilities include forecasting vegetative structure, assessing wildlife habitat, analyzing fire hazard, determining forest health risk, and monitoring ecological processes. Using a parallel processing ... developing silvicultural prescriptions, evaluating management scenar - ios, updating inventory information, and providing input to forest planning models (USDA 1999 and reference...

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... modeling (Nestler 2001, pers. comm.). The modeling strategy inherent in CEL HYBRID has subtle problems in maintaining conser- vation when any sources or sinks are present and a problem with inflation ... the biology. An individual-based population model is a specific example of the broader CEL HYBRID approach to modeling. What individual-based modeling does for population modelin...

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... development and use are shown in Tables 13.2 through 13 .7. Toxicity extrapolation models are intended mainly for use in screening-level risk assessments and for developing generic environmental ... discrete or continuous- time) and deterministic life-history matrix models are most appropriate for screening-level ecolog - ical risk assessments (Table 13.1). Some simple food-web...

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... INVESTMENT TRADE-OFFS Investments in enhancing the use of ecological models in environmental decision-making involve three trade-offs represented by the diamond-shaped boxes in Figure 14.1 (Ginzburg ... limiting factor. The third trade-off is between integrating existing models and creating new models (Fig- ure 14.1). Integrating existing models results in models with enhanced c...

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