Aggregation in model ecosystems. I. Perfect aggregation

Yoh Iwasa, Viggo Andreasen, Simon Levin

Research output: Contribution to journalArticlepeer-review

199 Scopus citations


Determining appropriate levels of aggregation or complexity constitutes a major problem in describing ecological systems. We give necessary and sufficient conditions for perfect aggregation in non-linear dynamical systems. This condition has a form explicitly related to that for aggregation of linear dynamics in automatic control theory and to that for aggregation of linear functions in economics. Application of the theory to several ecological examples supports the general principle of aggregating variables that functionally are either similar or complementary.

Original languageEnglish (US)
Pages (from-to)287-302
Number of pages16
JournalEcological Modelling
Issue number3-4
StatePublished - Jul 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ecological Modeling


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