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  Tree regeneration in models of forest dynamics: a key priority for further research

Díaz-Yáñez, O., Käber, Y., Anders, T., Bohn, F., Braziunas, K. H., Brůna, J., Fischer, R., Fischer, S. M., Hetzer, J., Hickler, T., Hochauer, C., Lexer, M. J., Lischke, H., Mairota, P., Merganič, J., Merganičová, K., Mette, T., Mina, M., Morin, X., Nieberg, M., Rammer, W., Reyer, C. P. O., Scheiter, S., Scherrer, D., Bugmann, H. (2024): Tree regeneration in models of forest dynamics: a key priority for further research. - Ecosphere, 15, 3, e4807.
https://doi.org/10.1002/ecs2.4807

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 Creators:
Díaz-Yáñez, Olalla1, Author
Käber, Yannek1, Author
Anders, Tim1, Author
Bohn, Friedrich1, Author
Braziunas, Kristin H.1, Author
Brůna, Josef1, Author
Fischer, Rico1, Author
Fischer, Samuel M.1, Author
Hetzer, Jessica1, Author
Hickler, Thomas1, Author
Hochauer, Christian1, Author
Lexer, Manfred J.1, Author
Lischke, Heike1, Author
Mairota, Paola1, Author
Merganič, Ján1, Author
Merganičová, Katarina1, Author
Mette, Tobias1, Author
Mina, Marco1, Author
Morin, Xavier1, Author
Nieberg, Mats2, Author              
Rammer, Werner1, AuthorReyer, Christopher P. O.2, Author              Scheiter, Simon1, AuthorScherrer, Daniel1, AuthorBugmann, Harald1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

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Free keywords: tree regeneration, tree recruitment, tree establishment, forest dynamics, models, landscape, stand, global
 Abstract: Tree regeneration is a key process in forest dynamics, particularly in the context of forest resilience and climate change. Models are pivotal for assessing long-term forest dynamics, and they have been in use for more than 50 years. However, an assessment of their ability to accurately represent tree regeneration is lacking. We assess how well current models capture the overall abundance, species composition, and mortality of tree regeneration. Using 15 models built to capture long-term forest dynamics at the stand, landscape, and global levels, we simulate tree regeneration at 200 sites representing large environmental gradients across Central Europe. The results are evaluated against comprehensive data from unmanaged forests. Most of the models overestimate regeneration levels, which is only compensated in some models by high simulated mortality rates in the early stages of individual trees dynamics. Simulated species diversity of regeneration matches the observed ranges. Models simulating higher species diversity at the stand level do not feature higher regeneration diversity. The effect of light availability on regeneration levels is captured better than the effect of temperature and soil moisture, but patterns are not consistent across models. Increasing complexity in the tree regeneration modules of the models is not related to higher accuracy of simulated tree regeneration. Furthermore, individual model design is more important than scale (stand, landscape, global) and approach (empirical, process-based) for accurately capturing tree regeneration. Despite considerable mismatches between simulation results and data, it is remarkable that most models capture the essential features of the highly complex process of tree regeneration, while not having been parameterized with such data. We conclude that much can be gained by evaluating and refining the modeling of regeneration processes. This has the potential to render long-term projections of forest dynamics under changing environmental conditions that are much more robust.

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Language(s): eng - English
 Dates: 2023-06-082023-11-202024-03-182024-03-18
 Publication Status: Finally published
 Pages: 25
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: Organisational keyword: RD2 - Climate Resilience
PIKDOMAIN: RD2 - Climate Resilience
Working Group: Forest and Ecosystem Resilience
Research topic keyword: Forest
Regional keyword: Europe
Model / method: 4C
MDB-ID: yes - 3427
OATYPE: Gold Open Access
DOI: 10.1002/ecs2.4807
 Degree: -

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Title: Ecosphere
Source Genre: Journal, SCI, Scopus, p3, oa
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Publ. Info: -
Pages: - Volume / Issue: 15 (3) Sequence Number: e4807 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/180228
Publisher: Wiley