Food web structure and species interactions reveal mechanisms underlying biodiversity-ecosystem functioning relationships

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

Abstract

The relationship between biodiversity and ecosystem functioning has been extensively studied over the last three decades using experiments, theoretical models, and more recently observational data. While most studies focus on species richness effects on ecosystem functioning, a large degree of variation remain unexplained, highlighting that other factors besides species richness are needed to fully understand and predict differences and changes in ecosystem functioning. In this study, we use a trait-based food web model to investigate the role of food web structure on multiple ecosystem functions (e.g. biomass, production, productivity, and metabolism). We demonstrate that the relationship with species richness depends on the type of ecosystem function considered. Furthermore, we show that the level of ecosystem functions is determined by particular food web configurations, as well as the degree of species dominance. Dominance plays a major role in determining the level of biomass in the food web, occurring via species interactions and occupancy of the trait space. By manipulating the structure of the food web, we show that species using a wider niche space (generalist communities) result in more connected food webs compared to species with a narrow niches (specialist communities), and generally reach the same level of functioning with a fewer number of species. We show that a trait-based approach can help understanding ecosystem structure and functioning of marine food webs, and help building research hypothesis for field-based studies.
Original languageEnglish
Publication date2019
Number of pages1
Publication statusPublished - 2019
EventICES Annual Science Conference 2019: ASC 2019 - Gothenburg, Sweden
Duration: 9 Sep 201912 Sep 2019
https://www.ices.dk/news-and-events/asc/asc2019/Pages/default.aspx

Conference

ConferenceICES Annual Science Conference 2019
CountrySweden
CityGothenburg
Period09/09/201912/09/2019
Internet address

Keywords

  • Biodiversity
  • Dominance
  • Ecosystem functioning
  • Food web structure
  • Trait-based approach

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