Journal
ECOLOGY LETTERS
Volume 24, Issue 9, Pages 1762-1775Publisher
WILEY
DOI: 10.1111/ele.13776
Keywords
coexistence; community assembly; function-dominance correlation; model intercomparison; plant diversity; productivity; seed dispersal
Categories
Funding
- Deutsche Forschungsgemeinschaft [FZT 118, RU 1536/3-1, 202548816]
- German Centre for Integrative Biodiversity Research (iDiv) [34600967, 34600900, 34600966, 34600970]
- Agence National de la Recherche [ANR-10-LABX-0041, ANR-10-LABX-25-01]
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Community composition plays a crucial role in how biodiversity changes affect ecosystem functioning, with the relationship between functional diversity and ecosystem functioning being influenced by the dominance of certain species in the community. Removing seed inflow can strengthen this link but weaken it within certain treatments, indicating that changes in species' identities may have a greater impact on ecosystem functioning than changes in species richness.
Community composition is a primary determinant of how biodiversity change influences ecosystem functioning and, therefore, the relationship between biodiversity and ecosystem functioning (BEF). We examine the consequences of community composition across six structurally realistic plant community models. We find that a positive correlation between species' functioning in monoculture versus their dominance in mixture with regard to a specific function (the function-dominance correlation) generates a positive relationship between realised diversity and ecosystem functioning across species richness treatments. However, because realised diversity declines when few species dominate, a positive function-dominance correlation generates a negative relationship between realised diversity and ecosystem functioning within species richness treatments. Removing seed inflow strengthens the link between the function-dominance correlation and BEF relationships across species richness treatments but weakens it within them. These results suggest that changes in species' identities in a local species pool may more strongly affect ecosystem functioning than changes in species richness.
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