| Data estimation and the colour of time series. | |
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MedLine Citation:
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PMID: 11735289 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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There has been a long debate on the source of temporal fluctuations in natural population densities. The difficulty is that unpredictable irregularities might be attributed either to external environmental factors or to chaotic dynamics of populations, or even to the interaction of these two factors. Some years ago Cohen (1995) pointed out that real time series follow redshifted Fourier power spectra, while the simplest chaotic population dynamical models are mostly blueshifted. Since then, the controversy has focused on comparisons of Fourier spectra originating from different models and data. Here, we show experimentally that estimation process by human observers shifts power spectra to the red. This result implies that because of estimation distortion, real population data must be less redshifted than many recorded time series suggest. |
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Authors:
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I Scheuring; O E Zeöld |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of theoretical biology Volume: 213 ISSN: 0022-5193 ISO Abbreviation: J. Theor. Biol. Publication Date: 2001 Dec |
Date Detail:
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Created Date: 2001-12-12 Completed Date: 2002-01-07 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0376342 Medline TA: J Theor Biol Country: England |
Other Details:
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Languages: eng Pagination: 427-34 Citation Subset: IM |
Copyright Information:
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Copyright 2001 Academic Press. |
Affiliation:
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Department of Plant Taxonomy and Ecology, Research Group of Ecology and Theoretical Biology, Eötvös University, Pdzmàny Péter Sétány 1/B, Budapest, H-1117, Hungary. shieazsf@ludens.elte.hu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Fourier Analysis* Likelihood Functions Models, Statistical* Population Dynamics* Sensitivity and Specificity Signal Processing, Computer-Assisted* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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