Partitioning the effects of plant diversity on ecosystem functions at different trophic levels

Cappelli, Seraina L.; Pichon, Noémie A.; Mannall, Tosca; Allan, Eric (2022). Partitioning the effects of plant diversity on ecosystem functions at different trophic levels. Ecological Monographs, 92(3), e1521. Ecological Society of America 10.1002/ecm.1521

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Biodiversity effects on ecosystem functioning can be partitioned into complementarity effects, driven by many species, and selection effects, driven by few. Selection effects occur through interspecific abundance shifts (dominance) and intraspecific shifts in functioning. Complementarity and selection effects are often calculated for biomass, but very rarely for secondary productivity, that is, energy transfer to higher trophic levels. We calculated diversity effects for three functions: aboveground biomass, insect herbivory and pathogen infection, the latter two as proxies for energy transfer to higher trophic levels, in a grassland experiment (PaNDiv) manipulating species richness, functional composition, nitrogen enrichment, and fungicide treatment. Complementarity effects were, on average, positive and selection effects negative for biomass production and pathogen infection and multiple species contributed to diversity effects in mixtures. Diversity effects were, on average, less pronounced for herbivory. Diversity effects for the three functions were not correlated, because different species drove the different effects. Benefits (and costs) from growing in diverse communities, be it reduced herbivore or pathogen damage or increased productivity either due to abundance increases or increased productivity per area were distributed across different plant species, leading to highly variable contributions of single species to effects of diversity on different functions. These results show that different underlying ecological mechanisms can result in similar overall diversity effects across functions.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Biodiversity

UniBE Contributor:

Cappelli, Seraina Lisa; Pichon, Noémie Anna; Mannall, Tosca Lisa and Allan, Eric

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0012-9615

Publisher:

Ecological Society of America

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

11 Oct 2022 08:59

Last Modified:

05 Dec 2022 16:26

Publisher DOI:

10.1002/ecm.1521

Related URLs:

BORIS DOI:

10.48350/173625

URI:

https://boris.unibe.ch/id/eprint/173625

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