Belowground impacts of alpine woody encroachment are determined by plant traits, local climate, and soil conditions

Collins Courtney G., Spasojevic Marko J., Alados Concepción L., Aronson Emma L., Benavides Juan C., Cannone Nicoletta, Caviezel Chatrina, Grau Oriol, Guo Hui, Kudo Gaku, Kuhn Nikolas J., Müllerová Jana, Phillips Michala L., Pombubpa Nuttapon, Reverchon Frédérique, Shulman Hannah B., Stajich Jason E., Stokes Alexia, Weber Sören E., Diez Jeffrey M.. 2020. Belowground impacts of alpine woody encroachment are determined by plant traits, local climate, and soil conditions. Global Change Biology, 26 (12) : 7112-7127.

Url - autres données associées : https://github.com/cour10eygrace/woody-encroachment-microbes.git / Url - jeu de données - Entrepôt autre : https://www.ncbi.nlm.nih.gov/bioproject/PRJNA659596/

Quartile : Outlier, Sujet : BIODIVERSITY CONSERVATION / Quartile : Outlier, Sujet : ECOLOGY / Quartile : Outlier, Sujet : ENVIRONMENTAL SCIENCES

Résumé : Global climate and land use change are causing woody plant encroachment in arctic, alpine, and arid/semi-arid ecosystems around the world, yet our understanding of the belowground impacts of this phenomenon is limited. We conducted a globally distributed field study of 13 alpine sites across four continents undergoing woody plant encroachment and sampled soils from both woody encroached and nearby herbaceous plant community types. We found that woody plant encroachment influenced soil microbial richness and community composition across sites based on multiple factors including woody plant traits, site level climate, and abiotic soil conditions. In particular, root symbiont type was a key determinant of belowground effects, as Nitrogen-fixing woody plants had higher soil fungal richness, while Ecto/Ericoid mycorrhizal species had higher soil bacterial richness and symbiont types had distinct soil microbial community composition. Woody plant leaf traits indirectly influenced soil microbes through their impact on soil abiotic conditions, primarily soil pH and C:N ratios. Finally, site-level climate affected the overall magnitude and direction of woody plant influence, as soil fungal and bacterial richness were either higher or lower in woody encroached versus herbaceous soils depending on mean annual temperature and precipitation. All together, these results document global impacts of woody plant encroachment on soil microbial communities, but highlight that multiple biotic and abiotic pathways must be considered to scale up globally from site- and species-level patterns. Considering both the aboveground and belowground effects of woody encroachment will be critical to predict future changes in alpine ecosystem structure and function and subsequent feedbacks to the global climate system.

Mots-clés Agrovoc : plante ligneuse, changement climatique, sol de région froide, plante herbacée, utilisation des terres, symbiote, chimie du sol, communauté végétale, santé des plantes

Mots-clés géographiques Agrovoc : Chine

Mots-clés libres : ALpine, Global change, Leaf traits, Plant-soil interactions, Soil microbes, Woody encroachment

Auteurs et affiliations

• Collins Courtney G., UC (USA)
• Spasojevic Marko J., UC (USA)
• Alados Concepción L., CSIC (ESP)
• Aronson Emma L., UC (USA)
• Benavides Juan C., Pontificia Universidad Javeriana (COL)
• Cannone Nicoletta, Insubria University (ITA)
• Caviezel Chatrina, University of Basel (CHE)
• Grau Oriol, CIRAD-ES-UMR Ecofog (GUF)
• Guo Hui, Nanjing Agricultural University (CHN)
• Kudo Gaku, Hokkaido University (JPN)
• Kuhn Nikolas J., University of Basel (CHE)
• Müllerová Jana, Czech Academy of Sciences (CZE)
• Phillips Michala L., UC (USA)
• Pombubpa Nuttapon, UC (USA)
• Reverchon Frédérique, INECOL (MEX)
• Shulman Hannah B., CSIC (ESP)
• Stajich Jason E., California State University (USA)
• Stokes Alexia, INRAE (FRA)
• Weber Sören E., UZH (CHE)
• Diez Jeffrey M., UC (USA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/614759/)

Métriques

[ Page générée et mise en cache le 2025-09-26 ]