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   . 2014 Feb 21:343:127-37.
   doi: 10.1016/j.jtbi.2013.11.020. Epub 2013 Dec 4.

Competition in di- and tri-trophic food web modules

   [39]Vlastimil Krivan^ [40] 1
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     * ^1 Institute of Entomology, Biology Center, Academy of Sciences of the Czech
       Republic, Czech Republic; Department of Mathematics and Biomathematics,
       Faculty of Science, University of South Bohemia, Branisovská 31, 370 05 Ceské
       Budejovice, Czech Republic. Electronic address: vlastimil.krivan@gmail.com.

     * PMID: 24316384
     * DOI: [41]10.1016/j.jtbi.2013.11.020

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Competition in di- and tri-trophic food web modules

   Vlastimil Krivan. J Theor Biol. 2014.
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   . 2014 Feb 21:343:127-37.
   doi: 10.1016/j.jtbi.2013.11.020. Epub 2013 Dec 4.

Author

   [45]Vlastimil Krivan^ [46] 1

Affiliation

     * ^1 Institute of Entomology, Biology Center, Academy of Sciences of the Czech
       Republic, Czech Republic; Department of Mathematics and Biomathematics,
       Faculty of Science, University of South Bohemia, Branisovská 31, 370 05 Ceské
       Budejovice, Czech Republic. Electronic address: vlastimil.krivan@gmail.com.

     * PMID: 24316384
     * DOI: [47]10.1016/j.jtbi.2013.11.020

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Abstract

   Competition in di- and tri-trophic food web modules with many competing species
   is studied. The food web modules considered are apparent competition between n
   species sharing a single predator and a diamond-like food web with a single
   resource, a single top predator and many competing middle species. The predators
   have either fixed preferences for their prey, or they switch between available
   prey in a way that maximizes their fitness. Dependence of these food web dynamics
   on environmental carrying capacity and food web connectance is studied. The
   results predict that optimal flexible foraging strongly weakens apparent
   competition and promotes species coexistence. Food web robustness (defined here
   as the proportion of surviving species) does not decrease with increased
   connectance in these food-webs. Moreover, it is shown that flexible prey
   switching leads to the same population equilibria as in corresponding food webs
   with highly specialized predators. The results show that flexible foraging
   behavior by predators can have very strong impact on species richness, as well as
   the response of communities to changes in resource enrichment and food-web
   connectance when compared to the same food-web topology with inflexible top
   predators. Several results on global stability using Lyapunov functions are
   provided.

   Keywords: Complexity; Cryptic species complexes; Population dynamics; Prey
   switching; The ideal free distribution.

   Copyright © 2013 Elsevier Ltd. All rights reserved.

   [48]PubMed Disclaimer

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