Počet záznamů: 1  

Modelling size structured food webs using a modified niche model with two predator traits

  1. 1.
    0440807 - BC 2015 RIV US eng J - Článek v odborném periodiku
    Klečka, Jan
    Modelling size structured food webs using a modified niche model with two predator traits.
    PLoS ONE. Roč. 9, č. 8 (2014), e99355. ISSN 1932-6203. E-ISSN 1932-6203
    Grant ostatní: GA JU(CZ) 145/2010/P
    Institucionální podpora: RVO:60077344
    Klíčová slova: body-size * ecological networks * stability
    Kód oboru RIV: EH - Ekologie - společenstva
    Impakt faktor: 3.234, rok: 2014
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4137999/pdf/pone.0099355.pdf

    The structure of food webs is frequently described using phenomenological stochastic models. A prominent example, the niche model, was found to produce artificial food webs resembling real food webs according to a range of summary statistics. However, the size structure of food webs generated by the niche model and real food webs has not yet been rigorously compared. To fill this void, I use a body mass based version of the niche model and compare prey-predator body mass allometry and predator-prey body mass ratios predicted by the model to empirical data. The results show that the model predicts weaker size structure than observed in many real food webs. I introduce a modified version of the niche model which allows to control the strength of size-dependence of predator-prey links. In this model, optimal prey body mass depends allometrically on predator body mass and on a second trait, such as foraging mode. These empirically motivated extensions of the model allow to represent size structure of real food webs realistically and can be used to generate artificial food webs varying in several aspects of size structure in a controlled way. Hence, by explicitly including the role of species traits, this model provides new opportunities for simulating the consequences of size structure for food web dynamics and stability.
    Trvalý link: http://hdl.handle.net/11104/0243936

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.