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    Climate reverses directionality in the richness-abundance relationship across the World's main forest biomes

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    Author
    Madrigal-Gonzalez, J; Calatayud, J; Ballesteros-Canovas, JA; Escudero, A; Cayuela, L; Rueda, M; Ruiz-Benito, P; Herrero, A; Aponte, C; Sagardia, R; ...
    Date
    2020-11-06
    Source Title
    Nature Communications
    Publisher
    NATURE RESEARCH
    University of Melbourne Author/s
    Aponte, Cristina
    Affiliation
    School of Ecosystem and Forest Sciences
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Madrigal-Gonzalez, J., Calatayud, J., Ballesteros-Canovas, J. A., Escudero, A., Cayuela, L., Rueda, M., Ruiz-Benito, P., Herrero, A., Aponte, C., Sagardia, R., Plumptre, A. J., Dupire, S., Espinosa, C., Tutubalina, O., Myint, M., Pataro, L., Lopez-Saez, J., Macia, M. J., Abegg, M. ,... Stoffel, M. (2020). Climate reverses directionality in the richness-abundance relationship across the World's main forest biomes. NATURE COMMUNICATIONS, 11 (1), https://doi.org/10.1038/s41467-020-19460-y.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/251782
    DOI
    10.1038/s41467-020-19460-y
    Open Access at PMC
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7648646
    Abstract
    More tree species can increase the carbon storage capacity of forests (here referred to as the more species hypothesis) through increased tree productivity and tree abundance resulting from complementarity, but they can also be the consequence of increased tree abundance through increased available energy (more individuals hypothesis). To test these two contrasting hypotheses, we analyse the most plausible pathways in the richness-abundance relationship and its stability along global climatic gradients. We show that positive effect of species richness on tree abundance only prevails in eight of the twenty-three forest regions considered in this study. In the other forest regions, any benefit from having more species is just as likely (9 regions) or even less likely (6 regions) than the effects of having more individuals. We demonstrate that diversity effects prevail in the most productive environments, and abundance effects become dominant towards the most limiting conditions. These findings can contribute to refining cost-effective mitigation strategies based on fostering carbon storage through increased tree diversity. Specifically, in less productive environments, mitigation measures should promote abundance of locally adapted and stress tolerant tree species instead of increasing species richness.

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