Identification of the Lagoon Ecosystems - Coastal Lagoons: Ecosystem Processes and Modeling for Sustainable Use and Development - page 30

I. Preconditions:

Data for the identification
of the compound or of the class
of chemical compounds: structure,
properties, utilization, storage

The structural model used to identify
the ecosystem or the complex
ecological systems where a
given chemical compound already
exists or is going to be introduced

1. Troposphere
[A 1 ]

K 1-3

3. Water
[A 3 ]
4. Suspended
particles [A 4 ]

K 3-5

II. Distribution in the HGMU

compartments and in the troposphere;
changes and transformation
mechanisms;
mathematical modeling

5. Sediments
[A 5 ]

k 1-2

K 2-4

K 4-5

2. Soil
[A 2 ]

LETHAL AND SUBLETHAL TOXICITY
- Structural modifications: cell, tissues, organs
- Effects on the biochemical and physiological
processes
- Mutagenesis and modification of the genetic
structure of populations

III. Effects caused by exposure and

uptake: individuals and populations
(toxicity tests)

- Transfer among the trophodynamic
modules
- Biotranformations
- Bioaccumulation and concentration

IV. Accessibility for the cycling system

and the behavior of the chemical
compound; mathematical modeling

- Simplification of the structure of trophodynamic
modules and of the trophic network itself
- Erosion of the gene pool
- Decrease in productivity and in the quality of
resources and services
- Deterioration of the genetic structure and of
the health of the human population

V. Ecotoxicological effects (remote,

cumulated and long-term effects);
mathematical modeling

FIGURE 2.9 The structure of the model of integrated approach for assessment of the transfer
pathways, of the changes and potential harmful effects of various classes of chemical com-
pounds.