PCI Forest and Wood Sciences

147

Title *

PDG-Arena: An ecophysiological model for characterizing tree-tree interactions in heterogeneous and mixed standsuse asterix (*) to get italics

Authors *

Camille Rouet, Hendrik Davi, Arsène Druel, Bruno Fady, Xavier MorinPlease use the format "First name initials family name" as in "Marie S. Curie, Niels H. D. Bohr, Albert Einstein, John R. R. Tolkien, Donna T. Strickland"

Year *

2024

Picture *

Abstract *

<p>In the context of the ongoing climate and biodiversity crises, mixed forest stands are increasingly considered as a sustainable management alternative to monocultures. We developed a new individual-based and process-based forest growth model, PDG-Arena, to simulate mixed forest functioning and test ecophysiological interactions among trees in mixed stands. The model builds upon the validated ecophysiological stand-scale model CASTANEA and integrates tree competition for light and water. We evaluated the performance of PDG-Arena by comparing the simulated growth with annual dendrochronological growth data from 37 common beech and silver fir monospecific and mixed plots in the French Alps. PDG-Arena showed a slightly better performance than CASTANEA when simulating even-age and monospecific forests (r2 of 32.1 versus 29.5%). When using structure-diverse and species-diverse inventories, PDG-Arena performed better than CASTANEA in pure beech (38.3 versus 22.9%) and mixed stands (40.5 versus 36.3%), but not in pure fir stands (39.8 versus 42.0%). The new model also showed a significant positive effect of species mixing on gross primary production (+5.5%), canopy absorbance (+11.1%) and transpiration (+15.8%). Our results thus show that tree-level process-based models such as PDG-Arena, formally simulating interspecific interactions, can serve as a valuable tool to understand and simulate the carbon, light and water dynamics of mixed stands.</p>

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Keywords (optional)

ecophysiology, process-based modeling, mixed forest, competition, diversity, overyielding, drought, ray-tracing, French Alps

Methods that require specific expertise (optional)

NonePlease indicate the methods that may require specialised expertise during the peer review process (use a comma to separate various required expertises).

Thematic fields *

Functional forest ecology

Suggested reviewers - Suggest up to 10 reviewers (provide names and Email addresses). (Optional)

Nicolas Delpierre, Nicolas.Delpierre@U-Psud.Fr, Charlotte Grossiord, charlotte.grossiord@wsl.ch, Harald Bugmann, harald.bugmann@env.ethz.ch, Maxime Cailleret, maxime.cailleret@inrae.fr, Santiago Sabaté Jorba, santi.sabate@ub.edu, Miquel de Cáceres, m.caceres@creaf.uab.cat, Miquel Caceres [m.caceres@creaf.uab.cat] suggested: Daniel Nadal i Sala <d_nadal@ub.edu>, Maxime Cailleret [maxime.cailleret@inrae.fr] suggested: I would contact Guillermo Gea-Izquierdo from INIA or Christopher Reyer from PIK Potsdam, Christopher Reyer [christopher.reyer@pik-potsdam.de] suggested: Sorry Erwin but I have to decline because of time constraints. However, I talked to my postdoc, Thirza van Laar, and she'll be happy to review the paper. thirza@pik-potsdam.de is her contact., Christopher Reyer [christopher.reyer@pik-potsdam.de] suggested: thanks for inviting me and all the best, Christopher Reyer [christopher.reyer@pik-potsdam.de] suggested: Christopher

e.g. John Doe john@doe.com

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Submission date

2024-02-12 11:14:08

Recommender

Erwin Dreyer

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