A1 Journal article (refereed)
A modified niche model for generating food webs with stage-structured consumers : The stabilizing effects of life-history stages on complex food webs (2021)

Nonaka, E., & Kuparinen, A. (2021). A modified niche model for generating food webs with stage-structured consumers : The stabilizing effects of life-history stages on complex food webs. Ecology and Evolution, 11(9), 4101-4125. https://doi.org/10.1002/ece3.7309

JYU authors or editors

Publication details

All authors or editors: Nonaka, Etsuko; Kuparinen, Anna

Journal or series: Ecology and Evolution

eISSN: 2045-7758

Publication year: 2021

Publication date: 31/01/2021

Volume: 11

Issue number: 9

Pages range: 4101-4125

Publisher: John Wiley & Sons

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1002/ece3.7309

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/74899

Web address of parallel published publication (pre-print): https://doi.org/10.22541/au.161211501.10254178/v1


1. Almost all organisms grow in size during their lifetime and switch diets, trophic positions, and interacting partners as they grow. Such ontogenetic development introduces life-history stages and flows of biomass between the stages through growth and reproduction. However, current research on complex food webs rarely considers life-history stages. The few previously proposed methods do not take full advantage of the existing food web structural models that can produce realistic food web topologies. 2. We extended the niche model by Williams & Martinez (2000) to generate food webs that included trophic species with a life-history stage structure. Our method aggregated trophic species based on niche overlap to form a life-history structured population; therefore, it largely preserved the topological structure of food webs generated by the niche model. We applied the theory of allometric predator-prey body mass ratio and parameterized an allometric bioenergetic model augmented with biomass flow between stages via growth and reproduction to study the effects of a stage structure on the stability of food webs. 3. When life-history stages were linked via growth and reproduction, fewer food webs persisted while persisting food webs tended to retain more trophic species. Topological differences between persisting linked and unlinked food webs were small to modest. Temporal variability of biomass dynamics and slopes of biomass spectra were lower in the linked food webs than the unlinked ones, suggesting that a life-history stage structure enhanced stability of complex food webs. 4. Our results suggest a positive relationship between the complexity and stability of complex food webs. A life-history stage structure in food webs may play important roles in dynamics of and diversity in food webs.

Keywords: food webs; complexity; ecological niche; life cycle (natural science); growth; mathematical models

Free keywords: life-history stages; complex food webs

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Related projects

Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 1

Last updated on 2022-20-09 at 14:49