The contribution of insects to global forest deadwood decomposition

Seibold Sebastian, Rammer Werner, Hothorn Torsten, Seidl Rupert, Ulyshen Michael D., Lorz Janina, Cadotte Marc W., Lindenmayer David B., Adhikari Yagya P., Aragón Roxana, Bae Soyeon, Baldrian Petr, Barimani Varandi Hassan, Barlow Jos, Bässler Claus, Beauchêne Jacques, et al.. 2021. The contribution of insects to global forest deadwood decomposition. Nature, 597 (7874) : 77-81.

Url - jeu de données - Entrepôt autre : https://doi.org/10.6084/m9.figshare.14545992

Quartile : Outlier, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Economie-gestion; Psychologie-éthologie-ergonomie

Résumé : The amount of carbon stored in deadwood is equivalent to about 8 per cent of the global forest carbon stocks. The decomposition of deadwood is largely governed by climate with decomposer groups—such as microorganisms and insects—contributing to variations in the decomposition rates. At the global scale, the contribution of insects to the decomposition of deadwood and carbon release remains poorly understood. Here we present a field experiment of wood decomposition across 55 forest sites and 6 continents. We find that the deadwood decomposition rates increase with temperature, and the strongest temperature effect is found at high precipitation levels. Precipitation affects the decomposition rates negatively at low temperatures and positively at high temperatures. As a net effect—including the direct consumption by insects and indirect effects through interactions with microorganisms—insects accelerate the decomposition in tropical forests (3.9% median mass loss per year). In temperate and boreal forests, we find weak positive and negative effects with a median mass loss of 0.9 per cent and −0.1 per cent per year, respectively. Furthermore, we apply the experimentally derived decomposition function to a global map of deadwood carbon synthesized from empirical and remote-sensing data, obtaining an estimate of 10.9 ± 3.2 petagram of carbon per year released from deadwood globally, with 93 per cent originating from tropical forests. Globally, the net effect of insects may account for 29 per cent of the carbon flux from deadwood, which suggests a functional importance of insects in the decomposition of deadwood and the carbon cycle.

Mots-clés Agrovoc : biodégradation, bois mort, Insecta, cycle du carbone, séquestration du carbone

Classification Agris : K01 - Foresterie - Considérations générales
F60 - Physiologie et biochimie végétale

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

Auteurs et affiliations

• Seibold Sebastian, Technical University of Munich (DEU) - auteur correspondant
• Rammer Werner, Technical University of Munich (DEU)
• Hothorn Torsten, UZH (CHE)
• Seidl Rupert, Technical University of Munich (DEU)
• Ulyshen Michael D., USDA (USA)
• Lorz Janina, University of Würzburg (DEU)
• Cadotte Marc W., Université de Toronto (CAN)
• Lindenmayer David B., ANU (AUS)
• Adhikari Yagya P., Universität Bayreuth (DEU)
• Aragón Roxana, CONICET (ARG)
• Bae Soyeon, University of Würzburg (DEU)
• Baldrian Petr, ASCR (CZE)
• Barimani Varandi Hassan, Agricultural and Natural Resources Research Centre of Mazandaran (IRN)
• Barlow Jos, Lancaster University (GBR)
• Bässler Claus, Johann Wolfgang Goethe University (DEU)
• Beauchêne Jacques, CIRAD-ES-UMR Ecofog (GLP) ORCID: 0000-0003-4578-3670
• et al.

Source : Cirad-Agritrop (https://agritrop.cirad.fr/599181/)

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