Evenness mediates the global relationship between forest productivity and richness

Hordijk Iris, Maynard Daniel S., Hart Simon P., Lidong Mo, Ter Steege Hans, Liang Jingjing, de-Miguel Sergio, Nabuurs Gert-Jan, Reich Peter B., Abegg Meinrad, Adou Yao Yves C., Alberti Giorgio, Almeyda Zambrano Angélica María, Alvarado Braulio Vilchez, Álvarez-Dávila Esteban, Alvarez-Loayza Patricia, Alves Luciana F., Ammer Christian, Antón-Fernández Clara, Araujo-Murakami Alejandro, Arroyo Luzmila, Avitabile Valerio, Aymard Corredor Gerardo A., Baker Timothy R., Balazy Radomir, Banki Olaf, Barroso Jorcely, Bastian Meredith, Bastin Jean-François, Birigazzi Luca, Birnbaum Philippe, Bitariho Robert, Boeckx Pascal, Bongers Frans, Bouriaud Olivier, Brancalion Pedro H.S., Brandl Susanne, Brienen Roel, Broadbent Eben North, Bruelheide Helge, Bussotti Filippo, Cazzolla Gatti Roberto, César Ricardo G., Cesljar Goran, Chazdon Robin L., Chen Han Y. H., Chisholm Chelsea, Cienciala Emil, Clark Connie J., Clark David B., Colletta Gabriel D., Coomes David A., Cornejo Valverde Fernando, Corral-Rivas José Javier, Crim Philip, Cumming Jonathan, Dayanandan Selvadurai, De Gasper André Luis, Decuyper Mathieu, Derroire Géraldine, DeVries Ben, Djordjevic Ilija, Iêda Amaral, Dourdain Aurélie, Engone Obiang Nestor Laurier, Enquist Brian, Eyre Teresa J., Belarmain Fandohan Adandé, Fayle Tom M., Ferreira Leandro V., Feldpausch Ted R., Finér Leena, Fischer Markus, Fletcher Christine D., Frizzera Lorenzo, Gamarra Javier Garcia Perez, Gianelle Damiano, Glick Henry B., Harris David, Hector Andrew, Hemp Andreas, Hengeveld Geerten M., Herault Bruno, Herbohn John, Hillers Annika, Honorio Coronado Eurídice N., Hui Cang, Cho Hyunkook, Ibanez Thomas, Bin Jung Il, Imai Nobuo, Jagodzinski Andrzej M., Jaroszewicz Bogdan, Johanssen Vivian, Joly Carlos Alfredo, Jucker Tommaso, Karminov Viktor, Kartawinata Kuswata, Kearsley Elizabeth, Kenfack David, Kennard Deborah K., Kepfer-Rojas Sebastian, Keppel Gunnar, Latif Khan Mohammed, Killeen Timothy J., Seok Kim Hyun, Kitayama Kanehiro, Köhl Michael, Korjus Henn, Kraxner Florian, Laarmann Diana, Lang Mait, Lewis Simon L., Lu Huicui, Lukina Natalia, Maitner Brian S., Malhi Yadvinder, Marcon Eric, Marimon Beatriz Schwantes, Marimon-Junior Ben Hur, Marshall Andrew Robert, Martin Emanuel, Martynenko Olga V., Meave Jorge A., Melo-Cruz Omar, Mendoza Casimiro, Merow Cory, Stanislaw Miscicki, Monteagudo Mendoza Abel, Moreno Vanessa S., Mukul Sharif A., Mundhenk Philip, Nava-Miranda Maria Guadalupe, Neill David, Neldner Victor J., Nevenic Radovan V., Ngugi Michael R., Niklaus Pascal A., Oleksyn Jacek, Ontikov Petr V., Ortiz-Malavasi Edgar, Pan Yude, Paquette Alain, Parada-Gutierrez Alexander, Parfenova Elena I., Park Minjee, Parren Marc, Parthasarathy Narayanaswamy, Peri Pablo Luis, Pfautsch Sebastian, Phillips Oliver L., Picard Nicolas, Piedade Maria Teresa F., Piotto Daniel, Pitman Nigel C.A., Polo Irina, Poorter Lourens, Dalberg Poulsen Axel, Poulsen John R., Pretzsch Hans, Ramirez Arevalo Freddy, Restrepo-Correa Zorayda, Rodeghiero Mirco, Rolim Samir, Roopsind Anand, Rovero Francesco, Rutishauser Ervan, Saikia Purabi, Salas-Eljatib Christian, Schall Peter, Schepaschenko Dmitry, Scherer-Lorenzen Michael, Schmid Bernhard, Schöngart Jochen, Searle Eric B., Seben Vladimir, Serra-Diaz Josep M., Sheil Douglas, Shvidenko Anatoly Z., Silva-Espejo Javier, Silveira Marcos, Singh James, Sist Plinio, et al.. 2023. Evenness mediates the global relationship between forest productivity and richness. Journal of Ecology, 111 (6) : 1308-1326.

https://doi.org/10.1111/1365-2745.14098

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Url - jeu de données - Entrepôt autre : http://doi.org/10.3929/ethz-b-000597256 / Url - jeu de données - Entrepôt autre : https://gfbinitiative.net/data/

Résumé : Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less pronounced at high levels of species richness. However, species richness alone cannot reflect all important properties of a community, including community evenness, which may mediate the relationship between biodiversity and productivity. If the evenness of a community correlates negatively with richness across forests globally, then a greater number of species may not always increase overall diversity and productivity of the system. Theoretical work and local empirical studies have shown that the effect of evenness on ecosystem functioning may be especially strong at high richness levels, yet the consistency of this remains untested at a global scale. 2. Here, we used a dataset of forests from across the globe, which includes composition, biomass accumulation and net primary productivity, to explore whether productivity correlates with community evenness and richness in a way that evenness appears to buffer the effect of richness. Specifically, we evaluated whether low levels of evenness in speciose communities correlate with the attenuation of the richness–productivity relationship. 3. We found that tree species richness and evenness are negatively correlated across forests globally, with highly speciose forests typically comprising a few dominant and many rare species. Furthermore, we found that the correlation between diversity and productivity changes with evenness: at low richness, uneven communities are more productive, while at high richness, even communities are more productive. 4. Synthesis. Collectively, these results demonstrate that evenness is an integral component of the relationship between biodiversity and productivity, and that the attenuating effect of richness on forest productivity might be partly explained by low evenness in speciose communities. Productivity generally increases with species richness, until reduced evenness limits the overall increases in community diversity. Our research suggests that evenness is a fundamental component of biodiversity–ecosystem function relationships, and is of critical importance for guiding conservation and sustainable ecosystem management decisions.

Mots-clés libres : Diversity, Ecosystem function and services, Evenness, Forests, Global, Productivity, Species richness

Classification Agris : P01 - Conservation de la nature et ressources foncières
K10 - Production forestière

Champ stratégique Cirad : CTS 1 (2019-) - Biodiversité

Agences de financement hors UE : Swiss National Science Foundation, Instituto de Conservação da Natureza

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