PROBLEM
FORMULATION
Data acquisition
on stressor
characteristics,
ecosystem
potentially at risk,
Ecological
effects--->
endpoint
selection
Characterization of
exposure
Char~l"tori7~tinn
_
r~~;t~~7iC)'
RISK
CHARACTERIZATION
Risk estimation
and risk
description
RiSk!
management
Stressor-response
profile
Figure 1.
FRAMEWORK for Ecological Risk Assessment (from EPA, 1992)
Structural
and
functional
effects
on
ecosystems
o
~
is""
"""
'"
>
z
(l>
""
~
(l>
So
0o
0t1CI
'<
("')
o
:::I
n
(l>
"S?;.
>
.D
t:
!2:?
;::;.
~
o
o
><
;::;.
o
0t1CI
'<
to
<.n