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| Karunanithi, Arunprakash T; U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Cincinnati, OH 45268; karunanithi.arunprakash@epa.gov; Cabezas, Heriberto; U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Cincinnati, OH 45268; cabezas.heriberto@epa.gov; Frieden, B. Roy; University of Arizona, Optical Sciences Center, Tucson, AZ 85721; roy.frieden@optics.arizona.edu; Pawlowski, Christopher W.; RD Zande and Associates, Cincinnati, OH 45249; cw_pawlowski@yahoo.com. |
| Ecosystem regime shifts, which are long-term system reorganizations, have profound implications for sustainability. There is a great need for indicators of regime shifts, particularly methods that are applicable to data from real systems. We have developed a form of Fisher information that measures dynamic order in complex systems. Here we propose the use of Fisher information as a means of: (1) detecting dynamic regime shifts in ecosystems, and (2) assessing the quality of the shift in terms of intensity and pervasiveness. Intensity is reflected by the degree of change in dynamic order, as determined by Fisher information, and pervasiveness is a reflection of how many observable variables are affected by the change. We present a new robust methodology to... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Ecosystems; Fisher information; Marine ecosystem; Regime shifts; Resilience; Sustainability.. |
| Ano: 2008 |
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