{"id":3114,"date":"2022-09-05T07:39:17","date_gmt":"2022-09-05T07:39:17","guid":{"rendered":"https:\/\/optmix.efno.fr\/?p=3114"},"modified":"2022-09-05T07:41:38","modified_gmt":"2022-09-05T07:41:38","slug":"article-paru-le-melange-despeces-darbres-tamponne-leffet-destabilisant-des-temperatures-sur-la-croissance-et-conduit-a-une-stabilisation-de-la-productivite","status":"publish","type":"post","link":"https:\/\/optmix.efno.fr\/?p=3114","title":{"rendered":"Article paru : le m\u00e9lange d’esp\u00e8ces d’arbres tamponne l’effet d\u00e9stabilisant des temp\u00e9ratures sur la croissance et conduit \u00e0 une stabilisation de la productivit\u00e9"},"content":{"rendered":"

Un article vient d\u2019\u00eatre publi\u00e9 dans la revue \u00ab Journal of Applied Ecology \u00bb portant sur l’effet du m\u00e9lange sur la stabilit\u00e9 de la productivit\u00e9. Cet article montre que les peuplements m\u00e9lang\u00e9s \u00e0 deux esp\u00e8ces ont une productivit\u00e9 plus stable dans le temps que les peuplements monosp\u00e9cifiques comparables. Les peuplements m\u00e9lang\u00e9s tamponneraient l’effet d\u00e9stabilisant des temp\u00e9ratures sur la croissance ce qui entrainerait une plus grande stabilit\u00e9 de la productivit\u00e9 des peuplements m\u00e9lang\u00e9s compar\u00e9 aux peuplements monosp\u00e9cifiques.<\/p>\n

Le dispositif OPTMix a contribu\u00e9 aux donn\u00e9es de cet article bas\u00e9 sur 261 placettes (87 tripl\u00e9s) de peuplements monosp\u00e9cifiques et m\u00e9lang\u00e9s (h\u00eatre – pin sylvestre, ch\u00eane sessile et p\u00e9doncul\u00e9 – pin sylvestre et \u00e9pic\u00e9a – pin sylvestre).<\/p>\n

del R\u00edo, M., H. Pretzsch, R. Ruiz-Peinado, H. Jactel, L. Coll, M. L\u00f6f, J. Aldea, C. Ammer, A. Avdagi\u0107, I. Barbeito, K. Bielak, F. Bravo, G. Brazaitis, J. Cern\u00fd, C. Collet, S. Cond\u00e9s, L. Dr\u00f6ssler, M. Fabrika, M. Heym, S.-O. Holm, G. Hylen, A. Jansons, V. Kurylyak, F. Lombardi, B. Matovi\u0107, M. Metslaid, R. Motta, T. Nord-Larsen, A. Nothdurft, J. den Ouden, M. Pach, M. Pardos, C. Poeydebat, Q. Ponette, T. P\u00e9rot, D. O. J. Reventlow, R. Sitko, V. Sramek, M. Steckel, M. Svoboda, K. Verheyen, S. Vospernik, B. Wolff, T. Zlatanov and A. Bravo-Oviedo (2022). \u00ab\u00a0Emerging stability of forest productivity by mixing two species buffers temperature destabilizing effect.\u00a0\u00bb Journal of Applied Ecology n\/a(n\/a) DOI: https:\/\/doi.org\/10.1111\/1365-2664.14267<\/a>.<\/p>\n

Abstract:<\/p>\n

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  1. The increasing disturbances in monocultures around the world are testimony to their instability under global change. Many studies have claimed that temporal stability of productivity increases with species richness, although the ecological fundamentals have mainly been investigated through diversity experiments. To adequately manage forest ecosystems, it is necessary to have a comprehensive understanding of the effect of mixing species on the temporal stability of productivity and the way in which it is influenced by climate conditions across large geographical areas.<\/li>\n
  2. Here, we used a unique dataset of 261 stands combining pure and two-species mixtures of four relevant tree species over a wide range of climate conditions in Europe to examine the effect of species mixing on the level and temporal stability of productivity. Structural equation modelling was employed to further explore the direct and indirect influence of climate, overyielding, species asynchrony and additive effect (i.e. temporal stability expected from the species growth in monospecific stands) on temporal stability in mixed forests.<\/li>\n
  3. We showed that by adding only one tree species to monocultures, the level (overyielding: +6%) and stability (temporal stability: +12%) of stand growth increased significantly. We identified the key effect of temperature on destabilizing stand growth, which may be mitigated by mixing species. We further confirmed asynchrony as the main driver of temporal stability in mixed stands, through both the additive effect and species interactions, which modify between-species asynchrony in mixtures in comparison to monocultures.<\/li>\n
  4. Synthesis and applications. This study highlights the emergent properties associated with mixing two species, which result in resource efficient and temporally stable production systems. We reveal the negative impact of mean temperature on temporal stability of forest productivity and how the stabilizing effect of mixing two species can counterbalance this impact. The overyielding and temporal stability of growth addressed in this paper are essential for ecosystem services closely linked with the level and rhythm of forest growth. Our results underline that mixing two species can be a realistic and effective nature-based climate solution, which could contribute towards meeting EU climate target policies.<\/li>\n<\/ol>\n

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    Un article vient d\u2019\u00eatre publi\u00e9 dans la revue \u00ab Journal of Applied Ecology \u00bb portant sur l’effet du m\u00e9lange sur la stabilit\u00e9 de la productivit\u00e9. Cet article montre que les peuplements m\u00e9lang\u00e9s \u00e0 deux esp\u00e8ces ont une productivit\u00e9 plus stable dans le temps que les peuplements monosp\u00e9cifiques comparables. Les peuplements m\u00e9lang\u00e9s tamponneraient l’effet d\u00e9stabilisant des … <\/p>\n

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