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Ecological analysis of CO-2 in an ecosystem
'Systems ecology' is an interdisciplinary field of ecology, that focuses on the study, development and organization of ecological systems, or ecosystems. Systems ecology seeks a holistic view of the interactions and transactions within and between biological and ecological systems. They realise, that the function of ecosystems can be influenced by human economics in fundamental ways.
Overview
Like Systems biology, systems ecology seeks a holistic view of the interactions and transactions within and between biological and ecological systems. Moreover, systems ecologists realise that the function of any ecosystem can be influenced by human economics in fundamental ways. They have therefore taken an additional transdisciplinary step by including economics in the consideration of ecological-economic systems. In the words of R.L. Kitching:[1]
★ ''Systems ecology can be defined as the approach to the study of ecology of organisms using the techniques and philosophy of systems analysis: that is, the methods and tools developed, largely in engineering, for studying, characteriszing and making predictions about complex entities, that is, systems..
★ ''In any study of an ecological system, an essential early procedure is to draw a diagram of the system of interest ... diagrams indicate the system's 'boundaries' by a solid line. Within these boundaries, series of components are isolated which have been chosen to represent that portion of the world in which the systems analyst is interested ... If there are no connections across the systems' boundaries with the surrounding 'systems environments', the systems are described as ''closed''. Ecological work, however, deals almost exclusively with ''open'' systems.''[2]
As a mode of scientific enquiry a central feature of Systems Ecology is the general application of the principles of energetics to all systems at any scale. Perhaps the most notable proponent of this view was Howard T. Odum - sometimes considered the father of ecosystems ecology. In this approach the principles of energetics constitute ecosystem principles. Reasoning by formal analogy from one system to another enables the Systems Ecologist to see principles functioning in an analogous manner across system-scale boundaries.
The fourth of these principles, the principle of maximum power efficiency, takes central place in the analysis and synthesis of ecological systems. The fourth principle suggests that the most evolutionarily advantageous system function occurs when the environmental load matches the internal resistance of the system. The further the environmental load is from matching the internal resistance, the further the system is away from its sustainable steady state. Therefore the systems ecologist engages in a task of resistance and impedance matching in ecological engineering, just as the electronic engineer would do.
As an environmental science, systems ecology has also been associated with the notion of ''field physiology'' which applies the concept of metabolism as understood in physiology and bioenergetics to 'the field', like a 'field' of wheat for example.
Topics in systems ecology
Ecological system metabolism
The image to the right is a summary of relationships between the storage quantity ''Q'', the forces ''X, N'', and the outflows ''J'', resistance ''R'', conductivity ''L'', time constants ''T'', and transfer coefficients ''k'' of ecosystem metabolism. The transfer coefficient "''k''", is also known as the ''metabolic constant''.
:''"All these relationships are automatically implied by the energy circuit symbol'' ". [3]
Closely related fields
Deep Ecology
Main articles: Deep Ecology
Deep Ecology is a school of philosophy pioneered by the Norwegian Philosopher, Gandhian scholar and environmental activist Arne Naess. Created in 1973 at an environmental conference in Budapest, it argues that the school of environmental management is anthropocentric, that the natural environment is not only "more complex than we imagine, it is more complex than we can imagine"[4]. Conencerned with the development of an "ecological self", which views the human ego as a part of a living system, rather than apart from such systems, "Experiential Deep Ecology" of Joanna Macy, John Seed and others, seeks to transcend altruism with a deeper self-interest, based upon biospherical equality beyond human chauvinism.
Earth systems engineering and management
Main articles: Earth systems engineering and management
Earth systems engineering and management (ESEM) is a discipline used to analyze, design, engineer and manage complex environmental systems. It entails a wide range of subject areas including anthroplogy, engineering, environmental science, ethics and philosophy. At its core, ESEM looks to "rationally design and manage coupled human-natural systems in a highly integrated and ethical fashion"
Ecological economics
Main articles: Ecological economics
Ecological economics is a transdisciplinary field of academic research that addresses the dynamic and spatial interdependence between human economies and natural ecosystems. Ecological economics brings together and connects different disciplines, within the natural and social sciences but especially between these broad areas. As the name suggests, the field is comprised of researchers with a background in economics and ecology. An important motivation for the emergence of ecological economics has been criticism on the assumptions and approaches of traditional (mainstream) environmental and resource economics.
Ecological energetics
Main articles: Ecological energetics
Ecological energetics is the quantitative study of the flow of energy through ecological systems. It aims to uncover the principles which describe the propensity of such energy flows through the trophic, or 'energy availing' levels of ecological networks. In systems ecology the principles of ecosystem energy flows or "ecosystem laws" (i.e. principles of ecological energetics) are considered formally analogous to the principles of energetics.
Ecological humanities
Main articles: Ecological humanities
Ecological humanities aims to bridge the divides between the sciences and the humanities, and between Western, Eastern and Indigenous ways of knowing nature. Like ecocentric political theory, the ecological humanities are characterised by a connectivity ontology and a commitment to two fundamental axioms relating to the need to submit to ecological laws and to see humanity as part of a larger living system.
Ecosystem ecology
A riparian forest in the White Mountains, New Hampshire (USA)
Main articles: Ecosystem ecology
Ecosystem ecology is the integrated study of biotic and abiotic components of ecosystems and their interactions within an ecosystem framework. This science examines how ecosystems work and relates this to their components such as chemicals, bedrock, soil, plants, and animals. Ecosystem ecology examines physical and biological structure and examines how these ecosystem characteristics interact]]
Industrial ecology
Main articles: Industrial ecology
Industrial ecology is the study of industrial process as linear (open loop) systems, in which resource and capital investments move through the system to become waste, to a closed loop system where wastes become inputs for new processes.
See also
★ Emergy
★ Energetics
★ Energy Systems Language
★ Holism in science
References
1. R.L. Kitching 1983, p.9.
2. (Kitching 1983, p.11)
3. H.T.Odum 1994, p. 26.
4. A statement attributed to British biologist J.B.S. Haldane
Literature
★ Gregory Bateson, ''Steps to an Ecology of Mind'', 2000.
★ Kenneth Edmund Ferguson, ''Systems Analysis in Ecology'', WATT, 1966, 276 pp.
★ Efraim Halfon, ''Theoretical Systems Ecology: Advances and Case Studies'', 1979.
★ J. W. Haefner, ''Modeling Biological Systems: Principles and Applications'', London., UK, Chapman and Hall 1996, 473 pp.
★ Richard F Johnston, Peter W Frank, Charles Duncan Michener, ''Annual Review of Ecology and Systematics'', 1976, 307 pp.
★ R.L. Kitching, ''Systems ecology'', University of Queensland Press, 1983.
★ Howard T. Odum, ''Systems Ecology: An Introduction'', Wiley-Interscience, 1983.
★ Howard T. Odum, ''Ecological and General Systems: An Introduction to Systems Ecology''. University Press of Colorado, Niwot, CO, 1994.
★ Friedrich Recknagel, ''Applied Systems Ecology: Approach and Case Studies in Aquatic Ecology'', 1989.
★ James. Sanderson & Larry D. Harris, ''Landscape Ecology: A Top-down Approach'', 2000, 246 pp.
★ Sheldon Smith, ''Human Systems Ecology: Studies in the Integration of Political Economy'', 1989.
External links
'Organisations'
★ Systems Ecology Department at the Stockholm University.
★ Systems Ecology Department at the University of Amsterdam.
★ Systems ecology Lab at SUNY-ESF.
★ Systems Ecology program at the University of Florida
★ Terrestrial Systems Ecology] of ETH Zurich.
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