Community Measures of Marine Food Networks and their Possible Applications
Ecology is the study of the relationships of organisms with one another and with their non-living environment. The keyword to notice in this definition is “relationships”. Rather than fixing attention upon the organism or population itself, we as ecologists should be primarily concerned with what transpires between populations. As we also pretend to being scientists, we aim to quantify our observations on these relationships, and this is most readily done when those interactions involve a palpable transfer of either material or energy. When we describe the species composition and densities of phytoplankton and Zooplankton in an open ocean gyre, we are behaving as good quantitative biologists. Not until we attempt to balance grazing rates with rates of respiration, nutrient uptake and sinking, are we acting as quantitative ecologists.
KeywordsFlow Network Total Throughput Community Measure Causal Loop Ground Symbol
Unable to display preview. Download preview PDF.
- Cale, W. G., O’Neill, R. V., and Gardner, R. H., 1982, Aggregation error in nonlinear ecological models, Submitted to J.Theor. Biol.Google Scholar
- Finn, J. T., 1977, Flow Analysis: A Method for Tracing Flows through Ecosystem Models, Ph.D. dissertation, Univ. of Georgia, Athens.Google Scholar
- Halfon, E., 1979, “Theoretical Systems Ecology,” Academic Press, New York.Google Scholar
- Leontief, W., 1951, “The Structure of the American Economy 1919–1939,” 2nd edn., Oxford University Press, New York.Google Scholar
- Pattern, B. C., Bosserman, R. W., Finn, J. T., and Cale, W. G., 1976, Propagation of cause in ecosystems, in: “Systems Analysis and Simulation in Ecology,” Vol. 4., B. C. Patten, ed., Academic Press, New York.Google Scholar
- Read, R. C., and Tarjan, R. E., 1975, Bounds on backtrack algorithms for listing cycles, paths, and spanning trees, Networks, 5:237.Google Scholar
- Ulanowicz, R. E., 1982a, NETWRK: a package of computer algorithms to analyze ecological flow networks, Ref. No. 82–7 CBL of the Center for Environmental and Estuarine Studies, Solomons, Maryland.Google Scholar
- Ulanowicz, R. E., 1982b, Identifying the structure of cycling in ecosystems, to appear in Mathematical Biosciences Google Scholar
- Yan, C. S., 1969, “Introduction to input — output economics,” Holt, Reinehart and Winston, New York.Google Scholar