Libro de Resúmenes / Book of Abstracts (Español/English)

Resumenes 53
Sustainability in flooded ecosystems
Decisions related to sustainability involve concerns about: "what to
sustain" and "how to sustain". Both assume the preservation of certain
characteristics in the intervening systems, be they natural or socioeconomic.
These concerns can be of ethical character or include
formulations with control mechanisms, searching to steer the whole system
towards a sustainable regime. Frameworks and lines of thought common in
this process focus on maintaining natural supplies and others factors,
disregarding variations in production processes and society, or spontaneous
variations in structure and components of intervening natural systems.
Amazon wetland ecosystems possess an intrinsic variability,
oscillating between two independent systems during low waters, and an
aquatic-terrestrial system during floods. The annual water pulse impacts
existing populations biomass and modifies trophic relations, bringing also
new populations into these systems, Weber (1997). On the other hand,
immigration of human populations with distinct cultures and technologies,
modifies habits and methods in the environmental setting, resulting in
adaptations within local productive and social systems. There is therefore,
the necessity of analyzing sustainability considering all these systems,
simultaneously.
In this work we study a simple environmental system of lumber
exploitation in Amazonian várzeas, Schöngart & Piedade (2005), with socioeconomic
information taken from sustainable development project at
Mamirauá Reserve, searching a bigger integration between models and
mathematical structures used in representation of systems that affect
sustainability, particularly with reference to the interaction between
ecological, productive and social systems.
Integrative investigations about sustainability are not easily found,
not due to a lack of perception about variability in systems involving man
and nature, but because the models and mathematical representations of
component systems have diverse nature. The evolution of ecosystems, for
instance, are represented by dynamical systems, while interactions between
people or organizations by games and relations in productive systems
appear as control or allocation problems. When expressed in mathematical
terms, these descriptions are confined to mathematical areas that are not
easily integrated and which techniques do not keep, at the moment, a
narrower relation. Thus, we use in this work symbolic forms inherited from
General Systems Theory to represent interactions between the natural,
productive and social systems, which helps the search for a bigger
integration in the mathematical descriptions of these systems.
Referências
• Barbier, E., 1989, Economics, natural resource. Earthscan Publications.
• Weber, G., 1997, Modelling Nutrients Fluxes in Floodplain Lakes. Ecological
Estudies.
• Da Silva, J., 2005, Sustentabilidade em uma estrutura de sistemas
integrados. Dissertação de Mestrado, LNCC, Petrópolis.