Species positions and extinction dynamics in simple food webs

Ferenc Jordán, I. Scheuring, Gábor Vida

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Recent investigations on the structure of complex networks have provided interesting results for ecologists. Being inspired by these studies, we analyse a well-defined set of small model food webs. The extinction probability caused by internal Lotka-Volterra dynamics is compared to the position of species. Simulations have revealed that some global properties of these food webs (e.g. the homogeneity of connectedness) and the positions of species therein (e.g. interaction pattern) make them prone to modelled biotic extinction caused by population dynamical effects. We found that: (a) homogeneity in the connectedness structure increases the probability of extinction events; (b) in addition to the number of interactions, their orientations also influence the future of species in a web. Since species in characteristic network positions are prone to extinction, results could also be interpreted as describing the properties of preferred states of food webs during community assembly. Our results may contribute to understanding the intimate relationship between pattern and process in ecology.

Original languageEnglish
Pages (from-to)441-448
Number of pages8
JournalJournal of Theoretical Biology
Volume215
Issue number4
DOIs
Publication statusPublished - 2002

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Biological Extinction
Food Web
Food Chain
Extinction
food webs
extinction
Connectedness
Homogeneity
Prone Position
Complex networks
Extinction Probability
Ecology
Lotka-Volterra
ecologists
Interaction
Complex Networks
Well-defined
Internal
ecology
Population

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Species positions and extinction dynamics in simple food webs. / Jordán, Ferenc; Scheuring, I.; Vida, Gábor.

In: Journal of Theoretical Biology, Vol. 215, No. 4, 2002, p. 441-448.

Research output: Contribution to journalArticle

Jordán, Ferenc ; Scheuring, I. ; Vida, Gábor. / Species positions and extinction dynamics in simple food webs. In: Journal of Theoretical Biology. 2002 ; Vol. 215, No. 4. pp. 441-448.
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