Effects of plant diversity on productivity strengthen over time due to trait-dependent shifts in species overyielding

Zheng Liting, Barry Kathryn E., Guerrero-Ramírez Nathaly R., Craven Dylan, Reich Peter B., Verheyen Kris, Scherer-Lorenzen Michael, Eisenhauer Nico, Barsoum Nadia, Bauhus Jürgen, Bruelheide Helge, Cavender-Bares Jeannine, Dolezal Jiri, Auge Harald, Fagundes Marina V., Ferlian Olga, Fiedler Sebastian, Forrester David I., Ganade Gislene, Gebauer Tobias, Haase Josephine, Hajek Peter, Hector Andy, Herault Bruno, et al.. 2024. Effects of plant diversity on productivity strengthen over time due to trait-dependent shifts in species overyielding. Nature Communications, 15:2078, 14 p.

https://doi.org/10.1038/s41467-024-46355-z

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Url - jeu de données - Entrepôt autre : https://doi.org/10.6084/m9.figshare.25148690 / Url - jeu de données - Entrepôt autre : https://www.try-db.org/TryWeb/ / Url - jeu de données - Entrepôt autre : https://groot-database.github.io/GRooT/ / Url - jeu de données - Entrepôt autre : https://bien.nceas.ucsb.edu/bien/ / Url - jeu de données - Entrepôt autre : https://austraits.org/ / Url - jeu de données - Entrepôt autre : ttps://treedivnet.ugent.be

Résumé : Plant diversity effects on community productivity often increase over time. Whether the strengthening of diversity effects is caused by temporal shifts in species-level overyielding (i.e., higher species-level productivity in diverse communities compared with monocultures) remains unclear. Here, using data from 65 grassland and forest biodiversity experiments, we show that the temporal strength of diversity effects at the community scale is underpinned by temporal changes in the species that yield. These temporal trends of species-level overyielding are shaped by plant ecological strategies, which can be quantitatively delimited by functional traits. In grasslands, the temporal strengthening of biodiversity effects on community productivity was associated with increasing biomass overyielding of resource-conservative species increasing over time, and with overyielding of species characterized by fast resource acquisition either decreasing or increasing. In forests, temporal trends in species overyielding differ when considering above- versus belowground resource acquisition strategies. Overyielding in stem growth decreased for species with high light capture capacity but increased for those with high soil resource acquisition capacity. Our results imply that a diversity of species with different, and potentially complementary, ecological strategies is beneficial for maintaining community productivity over time in both grassland and forest ecosystems.

Mots-clés Agrovoc : biodiversité, communauté végétale, biodiversité forestière, écosystème forestier

Mots-clés libres : Biodiversity, Community ecology

Classification Agris : F40 - Écologie végétale
P01 - Conservation de la nature et ressources foncières

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Agences de financement hors UE : State Key Program de la National Natural Science Foundation

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