Ecological Modeling in Risk Assessment - Chapter 8 doc
Ecological Modeling in Risk Assessment - Chapter 8 doc
... practical. Indeed, food-web models have already been applied in basic ecological research and
chemical risk assessments (Tables 8. 2 and 8. 3).
On the basis of our evaluation (Table 8. 2), we recommend ... 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...
Ecological Modeling in Risk Assessment - Chapter 5 docx
... 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...
Ecological Modeling in Risk Assessment - Chapter 10 docx
...
Crassulacean acid-
dependent succulents)
Semi-arid rangeland in
Texas and Colorado;
user-defined
Hanson et al. (1 988 )
Island
Multi-timescale
community dynamics
User-defined avian species User-defined ... capabilities include forecasting vegetative structure, assessing wildlife
habitat, analyzing fire hazard, determining forest health risk, and monitoring ecological processes.
Usi...
Ecological Modeling in Risk Assessment - Chapter 1 pps
... Number 1-5 667 0-5 7 4-6
Library of Congress Card Number 20010 382 78
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 ... of expressing
risk from the output of a population model are discussed later in this chapter (see Steps in Ecological Modeling for a
Chemical Risk Assessment,...
Ecological Modeling in Risk Assessment - Chapter 7 pptx
... results include risk of extinction, risk of decline, time to extinction, time
to decline, expected abundance, and expected variation in abundance. The model has several
parameters (e.g., carrying ... Gilpin and Hanski (1991),
Breininger et al. (in press), and Akçakaya and Sjögren-Gulve (2000).
We review two occupancy-type models and four software platforms for spatially structured...
Ecological Modeling in Risk Assessment - Chapter 9 pps
... endpoints included in the 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 ... 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 organ...
Ecological Modeling in Risk Assessment - Chapter 11 potx
... 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...
Ecological Modeling in Risk Assessment - Chapter 13 pdf
... 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 models, founded ... 2
Endpoints: Expected future abundance, risk of decline in abundance, risk of extinction,
time to extinction, time to decline, toxicant concentration in the environment,
toxican...
Ecological Modeling in Risk Assessment - Chapter 14 pot
...
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...
Ecological Modeling in Risk Assessment - Chapter 15 pdf
...
assessing the significance of estimated risks initially expressed in terms of individual-level end
-
points. In this mode, ecological models aid in translating risks for individual-level endpoints ... cost-effective approach for addressing
many risk assessment issues (Ferson et al. 1996; Barnthouse 19 98) . Indeed, incorporation of
simple, scalar population modeling into...
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