Affordable Access

Publisher Website

Data Estimation and the Colour of Time Series

Authors
Journal
Journal of Theoretical Biology
0022-5193
Publisher
Elsevier
Publication Date
Volume
213
Issue
3
Identifiers
DOI: 10.1006/jtbi.2001.2428
Disciplines
  • Ecology
  • Geography

Abstract

Abstract 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.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Data estimation and the colour of time series.

on Journal of Theoretical Biology Dec 07, 2001

The colour of noise in short ecological time serie...

on Mathematical medicine and biol... March 2004
More articles like this..