Ximi Elga


Significado de los principales símbolos energéticos de Odum, aplicados en Ejemplo de diagrama de flujos para una explotación maderera de pino ambiental em emergia, utilizando o Diagrama Emergético Ternário. . Odum ( ) para contabilizar os fluxos de massa e energia que ingressam e saem. um apanhado do desenvolvimento dos conceitos de forma de planta e .. períodos de seca, chamados de desertos e semidesertos frios (Odum ), e na região .. Figura 4 – Diagrama bioclimático de Dansereau (), em que as letras.

Author: Akizahn Nejas
Country: Guyana
Language: English (Spanish)
Genre: Video
Published (Last): 12 October 2010
Pages: 379
PDF File Size: 3.83 Mb
ePub File Size: 6.99 Mb
ISBN: 718-6-97053-902-2
Downloads: 58663
Price: Free* [*Free Regsitration Required]
Uploader: Dulabar

By using this site, you agree to the Terms of Use and Privacy Policy. Corning Harold G. Towards en ecological theory of unequal exchange: Otherwise the circuit reverses. Emergy, environ, exergy and ecological modelling.

The term ” embodied energy diagramz was used for a time in the early s to refer to energy quality differences in terms of their costs of ovum, and a ratio called a “quality factor” for the calories or joules of one kind of energy required to make those of another. Started from that overall model Odum “mapped in detail all the flow routes to and from the stream. In combining systems of humanity and nature and evaluating environmental input to economies, mainstream economists criticize the emergy methodology for disregarding market values.

The concept of emergy has been controversial within academe including ecology, thermodynamics and economy.

Howard T. Odum

It is thus postulated that natural selection of natural systems results in the formation of entities defined as above. For Hall [45] the importance of Odum’s work came through his integration of systems, ecology, and energy with economics, together with Odum’s view that economics can be evaluated on objective terms such as energy rather than on a subjective, willingness to pay basis. It was the first center of its kind in the world that is still in operation today.

All energies of higher quality wood, peat, coal, oil, living biomassetc. Ecological Engineering9, p. Archived from the original on Efficienc and diagramw indicators for passenger and commodities transportation systems.


He therefore funded the research into the use of conventional economic approaches to quantify dollar values of ecological resources for recreational, treatment and other uses.

Ecological Indicators1, p. After her death, he married Elizabeth C. Fossil fuels and then coal the baseline. The amount of available energy of one type usually solar that is directly dee indirectly required to generate a given output flow or storage of diqgrama or matter.

The reason that systems can not proceed toward some kind of disintegration is that such a pattern has no mechanism of maintaining itself. A diagram of a city and its regional support diagraa is shown in Figure 1.

If this postulate is applied to all of nature, the resulting proposition is that nature dee as a whole in a steady state or is in the most stable form possible and constitutes one big entity.

Retrieved from ” https: Ecological Modelling91, p. Ecological Engineerin g, 5, p. This page was last edited on 12 Decemberat An Introduction to Systems Ecology By dividing this conversion into ecological energy flow he calculated what he termed life support value. The Analysis of a Major Interface, R. This is one of his most important contributions to the beginnings of the field of ecological engineering. If solar emergy is the baseline, then the results are solar diiagrama abbreviated seJ.

Organic matter the baseline. Odum was measuring the community as a system, not adding up the metabolism of the components as Diagrqma and many others had done”. Journal of Cleaner Production10, p. Urban ecosystems, energetic hierarchies, and ecological economics of Taipei metropolis, Journal dixgrama Environmental Management52, p. FFWE’s were replaced with coal equivalents CE and bythe system of evaluating quality was placed on a solar basis and termed solar equivalents SE.

The second, revised edition of his major lifework ldum retitled Ecological and General Systems: Odum viewed humans as playing a central role: Circuit diagrams were skillfully used to illustrate the dependence of agricultural ecosystems and industrial societies upon fossil fuel subsidies The term ecological engineering was first coined by Howard T. Linhas de Fontes de Recursos: However this principle has only been demonstrated in a few experiments [38] and is digarama widely recognized in the scientific community.


Ecological-economic evaluation of wetland management alternatives, Ecological Engineering11, p. Some consider the concept of “emergy”, sometimes briefly defined as “energy memory”, as one of Odum’s more significant contributions.

Howard T. Odum – Wikipedia

Le Chatelier’s principle from this view point may be phrased that a system with a self correcting mechanism has reached this condition by natural selection. Joule’s mechanical equivalent of heat. Around Odum directed studies into radioecology [26] which included the effects of radiation on the tropical rainforest at El Verde, Puerto Rico Odum and Pidgeonand the coral reefs and ocean ecology at Eniwetok atoll.

He was one of the first to discuss the use of ecosystems for life-support function in space travel.

Decision-making tool considering the interaction of the production systems and the environment

Using emergy, sunlight, fuel, electricity, and human service can be put on a common basis by expressing each of them in the emjoules of solar energy that is required to produce them. The important dialog about the value of salt marsh wetlands Odum used simple electrical networks composed of batteries, wires, resistors and capacitors as models for ecological systems.

Inhe introduced a table of “Energy Quality Factors”, kilocalories of sunlight energy required to make a kilocalorie of a higher quality energy, [13] the first mention of the energy hierarchy principle which states that “energy quality is measured by the energy used in the transformations” from one type of energy to the next.

Odum used an analog of electrical energy networks to model the energy flow pathways of ecosystems.