Everything about Howard T Odum totally explained
Howard Thomas Odum (1924,
Chapel Hill, North Carolina–2002
Gainesville, Florida) (also known as
Tom or just
H.T.) was an
American ecologist. He is known for his pioneering work on
ecosystem ecology, and for his provocative proposals for additional laws of thermodynamics, informed by his work on
general systems theory.
Biography
Odum was the third child of the American sociologist
Howard W. Odum, and the brother of
Eugene Odum. The father encouraged his sons to go into science and to develop new techniques to contribute to
social progress. Howard learned his early scientific lessons about birds from his brother, about fish and the
philosophy of biology while working after school for the
marine zoologist Robert Coker, and about electrical circuits from "The Boy Electrician. .
Howard Thomas studied
zoology at the
University of North Carolina at Chapel Hill, where he published his first paper while still an undergraduate. His education was interrupted for three years by his
wartime service with the
Army Air Force in
Puerto Rico and the
Panama Canal Zone where he worked as a tropical
meteorologist. After the war, he returned to the University of North Carolina and completed his
B.S. in zoology (Phi Beta Kappa) in 1947.
In 1947, Odum married Virginia Wood; they'd two children. After her 1973 death, he married Elizabeth C. Odum in 1974; she'd four children from her previous marriage. Odum's advice on how to manage a blended family was to be sure to keep talking; Elizabeth's was to hold back on discipline and new rules.
In 1950 Howard earned his Ph.D. in zoology at
Yale University, 1950 under the guidance of
G. Evelyn Hutchinson. His dissertation was titled
The Biogeochemistry of Strontium: With Discussion on the Ecological Integration of Elements. This step took him from his early interest in ornithology and brought him into the emerging field of
systems ecology. Through this analysis of the global circulation of strontium, anticipated in the late 1940s the now-accepted view of the earth as one great
ecosystem.
While at Yale, Howard began his life-long collaborations with his brother Eugene. In 1953, they published the first English-language textbook on systems ecology,
Fundamentals of Ecology. Howard wrote the chapter on
energetics which introduced his energy circuit language. They continued to collaborate, in research as well as writing, for the rest of their lives. For Howard, his energy systems language (which he called "energese") was itself a collaborative tool.
From 1956 to 1963, Odum worked as Director of the Marine Institute of the University of Texas. During this time, he became aware of the interplay of ecological-energetic and economic forces. He then taught at the Center for Environmental Policy at the University of Florida for roughly thirty years, and founded the University's Center for Wetlands in 1973, the first of its kind in the world. In the 1960's-
1970's Odum was also chairman of the
International Biological Program's Tropical Biome planning committee and was supported by large contracts with the United States Atomic Energy Commission with nearly 100 scientists, which involved radiation studies of a tropical rainforest
In his last years, Odum was Graduate Research Professor Emeritus and Director of the Center for Environmental Policy. He was an avid
birdwatcher in both his professional and personal life.
The Ecological Society awarded Odum its Mercer Award to recognize his contributions to the study of the coral reef on
Eniwetok Atoll . Odum also received the French Prix de Vie, and the
Crafoord Prize of the Royal Swedish Academy of Science considered the Nobel equivalent for bioscience not originally honored by Nobel himself.
Charles A S Hall has called Odum one of the most innovative and important thinkers of our time, noting that Howard Odum, either alone or with his brother Eugene, received essentially all of international prizes awarded to ecologists.
Odum's contributions to this field have been recognised by the
Mars Society who named their experimental station the "H.T.Odum greenhouse", at the suggestion of his former student Patrick Kangas. Kangas and his student, David Blersch, made significant contributions to the design of the waste water recycling system.
Odum's students have carried on his work at institutions around the world, most notably Mark Brown at the
University of Florida, David Tilley and Patrick Kangas at the
University of Maryland, Daniel Campbell at the
United States EPA, Enrique Ortega at the
UNICAMP in
Brazil, and Sergio Ulgiati at the
University of Siena. Work done at these institutions continues to evolve and propagate the Odum's concept of
emergy.
Work: An overview
Odum left a large legacy in many fields associated with ecology, systems, and energetics. He studied ecosystems all over the world, and pioneered the study of several areas, some of which are now distinct fields of research. According to Hall (1995, p.ix), Odum published one of the first significant papers in each of the following areas:
Ecological modeling
A new integrative approach in ecology
In his 1950 Ph.D. thesis, H.T.Odum gave a novel definition of ecology as the study of large entities (ecosystems) at the "natural level of integration" . Hence, in the traditional role of an ecologist, one of Odum's doctoral aims was to recognise and classify large cyclic entities (ecosystems). However another of his aims was to make predictive generalizations about ecosystems, such as the whole world for example. For Odum, as a large entity, the world constituted a revolving cycle with high
stability. It was the presence of stability which, Odum believed, enabled him to talk about the
teleology of such
systems. Moreover, at the time of writing his thesis, Odum felt that the principle of
natural selection was more than
empirical, because it had a teleological, that's a "stability over time" component. And as an ecologist interested in the behaviour and function of large entities over time, Odum therefore sought to give a more general statement of natural selection so that it was equally applicable to large entities as it was to small entities traditionally studied in biology:
Hence Odum also had the aim of extending the scope and generality of natural selection, to include large entities such as the world. This extension relied on the definition of an
entity as a combination of properties that have some stability with time Odum's approach was motivated by
Lotka's idea's on the energetics of evolution.
Ecosystem simulation
In writing a history of the ecosystem concept, Golley noted that Odum tended to think in the form of analogies, and gave the example, "if the world is a heat engine, then..." In this vein, Odum can be understood as extending the
dynamical analogies which establish the analogies between electrical, mechanical, acoustical, magnetic and electronic systems, to include ecological systems.
Odum used an analog of electrical energy networks to model the energy flow pathways of ecosystems. Odum's analog electrical models had a significant role in the development of his approach to systems and have been recognized as one of the earliest instances of systems ecology.
Electron flow in the electrical network represented the flow of material (for example carbon) in the ecosystem, charge in a capacitor was analogous to storage of a material, and the model was scaled to the ecosystem of interest by adjusting the size of electrical component.
Ecological analog of Ohm's Law
In the 1950s Odum introduced his electrical circuit diagrams of ecosystems to the Ecological Society of America. He claimed that energy was driven through ecological systems by an "ecoforce" analogous to the role of voltage in electrical circuits.
Odum developed an analogue of Ohm's Law which aimed to be a representation of energy flows through ecosystems. In terms of steady state thermodynamics, Ohm's Law can be considered a special case of a more general flux law, where the flux (
) "is proportional to the driving thermodynamic flux (
) with conductivity (
). That is:
.
Kangas states that Odum then also concluded that as thermodynamic systems, ecosystems should also obey the
force-flux law . Hence Ohm's law and passive electrical analog circuits can be used to simulate ecosystems (
Ibid.). In this simulation, Odum attempted to derive an ecological analog for electrical voltage. Voltage, or driving force, is related to something we've measured for years, the
biomass, in pounds per acre. The analogous concept required is the biomass activity, that is, the thermodynamic thrust, which may be linear. Exactly what this is in nature is still uncertain, as it's a new concept.
Such a consideration led Odum to ask two important methodological questions: 1) What is the electrical significance of a function observed in nature? 2) Given an electrical unit in a circuit, what is it in the ecological system? For example, what is a diode in nature? One needs a diode to allow biomass to accumulate after the voltage of the sun has gone down. Otherwise the circuit reverses. Higher organisms like fish are diodes.
The Silver Spring study
Silver Spring is a common type of spring-fed stream in
Florida, with a constant temperature and chemical composition. The study Howard Odum conducted here was the first complete analysis of a natural
ecosystem. H are herbivores, C are carnivores, TC are top carnivores, and D are decomposers. Squares represent biotic pools and ovals are fluxes or energy or nutrients from the system.
Odum mapped in detail all the flow routes to and from the stream. He measured the energy input of sun and rain, and of all organic matter - even those of the bread the tourists threw to the ducks and fish - and then measured that gradually left the spring. In this way he was able to establish the stream's energy budget. which included the effects of radiation on the tropical rainforest at El Verde, Puerto Rico (Odum and Pidgeon), and the coral reefs and ocean ecology at Eniwetok atoll. The Odum brothers were approached by the Atomic Energy Commission to undertake a detailed study of the atoll after nuclear testing. Apparently the atoll was sufficiently radioactive that upon their arrival the Odums were able to produce an
autoradiographic image of a coral head by placing it on photographic paper. These studies were early applications of energy concepts to ecological systems. They were exploring the implications of the laws of thermodynamics when used in these new settings.
From this view, biogeochemical cycles are driven by radiant energy. Odum expressed the balance between energy input and output as the ratio of production (
P) to
respiration (
R):
P-R. He classified water bodies based on their
P-R ratios, this separated
autotrophic from
heterotrophic ecosystems: "his measurements of flowing water metabolism were measurements of whole systems. Odum was measuring the community as a system, not adding up the metabolism of the components as Lindeman and man others had done". This reasoning appears to have followed that of Odum's doctoral supervisor, G.E.Hutchinson who expressed the view that if a community were an organism then it must have a form of metabolism However Golley notes that H.T.Odum attempted to go beyond the reporting of mere ratios, a move which resulted in the first serious disagreement in systems energetics.
Maximum power theory and the proposal for additional laws of thermodynamics/energetics
In a controversial move, Odum, together with Richard Pinkerton (at the time physicist at the University of Florida), was motivated by
Lotka's articles on the energetics of evolution, and subsequently proposed that the theory that natural systems tend to operate at an efficiency that produces the
maximum power output, not the maximum efficiency. This theory in turn motivated Odum to propose maximum power as a fundamental thermodynamic law. Further to this Odum also mooted two more additional thermodynamic laws (see
Energetics), but there's far from consensus in the scientific community about these proposals, and many scientists have never heard of H.T.Odum or his views.
Energese: Energy Systems Language
By the end of the 1960s Odum's electronic circuit ecological simulation models were replaced by a more general set of energy symbols. When combined to form systems diagrams, these symbols were considered by Odum and others to be the language of the macroscope which could portray generalized patterns of energy flow: "Describing such patterns and reducing ecosystem complexities to flows of energy, Odum believed, would permit discovery of general ecosystem principles". Some have attempted to link it with the
universal scientific language projects which have appeared throughout the history of natural philosophy
Kitching claimed that the language was a direct result of working with analogue computers, and reflected an electrical engineer's approach to the problem of system representation: "Because of its electrical analogy, the Odum system is relatively easy to turn into mathematical equations ... If one is building a model of energy flow then certainly the Odum system should be given serious consideration... "
Energy quality
In taking an energy-based view of hierarchical organization also developed further the systems ecology understanding of
energy quality.
Emergy
In the 1990s in the latter part of his career H.T. Odum together with
David M. Scienceman developed the ideas of
emergy, as a specific use of the term
Embodied energy. Some consider the concept of "emergy", sometimes briefly defined as "energy memory", as one of Odum's more significant contributions. However the concept is neither free from controversy, and not without its critics. Odum looked at natural systems as having been formed by the use of various forms of energy in the past: "emergy is a measure of energy used in the past and thus is different from a measure of energy now. The unit of emergy (past available energy use) is the emjoule to distinguish it from joules used for available energy remaining now." This was then conceived as a principle of
maximum empower which might explain the
evolution of self-organising open systems. However such a principle hasn't been empirically demonstrated nor verified by the scientific community.
Ecosystem ecology and systems ecology
» Main articles: Ecosystem ecology and systems ecology
For Hagen, the maximum power principle, and the stability principle could be easily translated into the language of
homeostasis and
cybernetics systems Hagen claims that the feedback loops in ecosystems, were, for Odum, analogous to the kinds of feedback loops diagrammed in electronic circuits and cybernetic systems (
Ibid.). This approach represented the migration of cybernetic ideas into ecology and led to the formulation of systems ecology. In Odum's work these concepts form part of what Hagen called an, "ambitious and idiosyncratic attempt to create a universal science of systems" (
Ibid).
The ecosystem concept
Macroscope
Hagen has identified the systems thinking of Odum as a form of holistic thinking. Odum contrasted the holistic thinking of systems science with reductionistic microscopic thinking, and used the term "macroscope" to refer to the holistic view, which was a kind of "detail eliminator" allowing a simple diagram to be created.
Microcosms
H.T.Odum was a pioneer in his use of small closed and open ecosystems in classroom teaching. These small ecosystems were often constructed from fish tanks or bottles and have been called
microcosms. Odum's microcosm studies influenced the design of
Biosphere 2
Hierarchical organization
In observing the way higher order trophic levels have a control function in ecosystems H.T.Odum arrived at the concept he termed
hierarchical organization.
Ecological economics
Ecological economics is now an active field between
economics and ecology with annual conferences, international societies and an international journal. From 1956 to 1963 H.T.Odum worked as Director of the Marine Institute of the University of Texas. During this time Odum became aware of the interplay of ecological-energetic and economic forces. 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. This research calculated the potential value of primary production per bay surface area
For Hall 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.
Ecological engineering
Ecological Engineering is an emerging field of study between ecology and
engineering concerned with the designing, monitoring and constructing of
ecosystems. The term ecological engineering was first coined by the
Howard T. Odum in 1962 when he worked at the University of Florida. Ecological engineering, he wrote, is "those cases where the energy supplied by man is small relative to the natural sources but sufficient to produce large effects in the resulting patterns and processes."
General systems theory
Odum has been described as a "technocratic optimist". His approach was significantly influenced by his father who was also an advocate of viewing the social world through the various lenses of physical science. Within the processes on earth, H.T.Odum (1989) viewed humans as playing a central role: He said that the "human is the biosphere's programmatic and pragmatic information processor for maximum performance".
... Integration of science and society ...??
Literature
H.T. Odum wrote some 15 books and 300 papers, and a
Festschrift volume (
Maximum Power: The Ideas and Applications of H.T.Odum 1995) was published in honour of his work.
Books
2001, A Prosperous Way Down: Principles and Policies, with Elisabeth C. Odum, University Press of Colorado.
2000, with E.C. Odum, Modeling for all Scales: An introduction to System Simulation, Academic Press.
1999, Heavy Metals in the Environment: Using Wetlands for Their Removal.
1999, Biosphere 2 : Research, Past and Present, with Bruno D. V. Marino.
1996, Environmental Accounting: EMERGY and environmental decision making.
1993, Ecological Microcosms, with Michael J. Beyers.
1984, Cypress Swamps with Katherine C. Ewel.
1983, Systems Ecology : an Introduction.
1981, Energy Basis for Man and Nature, with Elisabeth C. Odum.
1970, with Robert F. Pigeon (eds), A Tropical Rain Forest; a Study of Irradiation and Ecology at El Verde, Puerto Rico, United States Atomic Energy Commission, National Technical information service.
1971, Environment, Power and Society, 1971
1967, (ed.) Work Circuits and System Stress, in Young, Symposium on Primary Productivity and Mineral Cycling, Universit of Maine Press.
1953, 'Fundamentals of Ecology, with Eugene P. Odum, (first edition).
Articles (selection)
1998, eMergy Evaluation
, paper presented at the International Workshop on Advances in Energy Studies: Energy flows in ecology and economy, Porto Venere, Italy, May 27.
1989, Comments and thanks to Students and Associates, Handout on the Occasion of the Celebration in Chapel Hill, N.C, in: "Advances in Understanding Ecological Systems", August 31-September, 2.
1977, The ecosystem, energy, and human values, in: Zygon, Volume 12 Issue 2 Page 109-133.
1973, Energy, ecology and economics, Royal Swedish Academy of Science. in: AMBIO, 2 (6), 220-227.
1963, with W.L. Slier, R.J. Beyers & N. Armstrong, Experiments with engineering of marine ecosystems, in: Publ. Inst. Marine Sci. Univ. Tex. 9:374-403.
1963, Limits of remote ecosystems containing man, in: The American Biology Teacher. 25 (6): 429-443.
1960a, Ecological potential and analog circuits for the ecosystem, in: Amer. Sci. 48:1-8.
1960b, Ten classroom sessions in ecology in: The American Biology Teacher. 22 (2): 71-78.
1958, with C.M. Hoskin, Comparative studies of the metabolism of Texas bays, in: Publ. Inst. Mar. Sci., Univ. tex., 5:16-46.
1955, with E.P. Odum, Trophic structure and productivity of a winward coral reef community on Eniwetok Atoll, in: Ecological Monographs. 35, 291-320.
1950, The Biogeochemistry of Strontium: With Discussion on the Ecological Integration of Elements, A Dissertation presented to the Faculty of the Graduate School of Yale University in Candidacy for the Degree of Doctor of Philosophy.
About Howard T. Odum
Beyers, R.J. 1964. The Microcosm Approach to Ecosystem Biology. The American Biology Teacher. 26 (7): 491-498.
Bocking, S. 1997. Ecologists and environmental politics: a history of contemporary ecology, Yale University.
Cevolatti, D., and Maud, S., 2004, " Realising the Enlightenment: H. T. Odum's Energy Systems Language qua G. W. v. Leibniz's Characteristica Universalis," Ecological Modelling 178: 279-92.
Costanza, R. 1997. An Introduction to Ecological Economics, CRC Press.
Ewel, John J. 2003. Resolution of Respect: Howard Thomas Odum Bulletin of the Ecological Society of America. January 2003: 12-15 (PDF)
Gilliland, M.W. ed. (1978) Energy Analysis: A New Public Policy Tool, AAA Selected Symposia Series, Westview Press, Boulder, Colorado.
Golley, F. 1993. A History of the Ecosystem Concept in Ecology: More than the sum of the parts, Yale University Press.
Hagen, J.B. 1992. An Entangled Bank: The Origins of Ecosystem Ecology. Rutgers University Press.
Hall, C.A.S. (ed.) 1995. Maximum Power: The Ideas and applications of H.T.Odum. Colorado University Press.
Debora Hammond, 1997. Ecology and Ideology in the General Systems Community, Environment and History, Volume 3, Number 2, pp. 197-207(11)
Hammond, G. 2007. Energy and sustainability in a complex world: Reflections on the ideas of Howard T. Odum, Int. J. Energy Res. (in press).
Kangas, P. 1995. Contributions of H.T.Odum to Ecosystem Simulation Modelling, in Hall (ed.) Maximum Power: the Ideas and Applications of H.T.Odum, Colorado University Press, Colorado.
Kangas P. 2004. The role of passive electrical analogs in H.T. Odum's systems thinking, Ecological Modelling, v 178 (1-2), 101-106.
Kangas P. 2004b. Ecological economics began on the Texas bays during the 1950s, Ecological Modelling, v 178 (1-2), 179-181.
Kitching R.L. 1983. Systems Ecology: An Introduction to Ecological Modelling, University of Queensland Press.
Lugo, A. E. 1995. A review of Dr. Howard T. Odum's early publications: From bird migration studies to scott nixon's turtle crass model. In Hall (ed.) Maximum Power: The Ideas and applications of H.T.Odum. Colorado University Press.
Madison, M.G. 1997. 'Potatoes Made of Oil': Eugene and Howard Odum and the Origins and Limits of American Agroecology, Environment and History, Volume 3, Number 2, June 1997, pp. 209-238 (30
Odum, E.C. 1995. H.T. Odum as a Husband and Colleague, in Hall (ed.), Maximum Power: The Ideas and applications of H.T. Odum. Colorado University Press, pp.360-361.
Taylor, Peter J. 1988. Technocratic optimism, H.T. Odum and the partial transformation of ecological metaphor after World War 2. Journal of the History of Biology 21:213-244.Further Information
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