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Title (Primary) Carbon sequestration in mixed deciduous forests: the influence of tree size and species composition derived from model experiments
Author Holtmann, A.; Huth, A.; Pohl, F.; Rebmann, C.; Fischer, R.
Journal Forests
Year 2021
Department OESA; CHS
Volume 12
Issue 6
Page From art. 726
Language englisch
Topic T5 Future Landscapes
Keywords forest model; species-mixed deciduous temperate forest; carbon fluxes; structure; tree size; species composition; FORMIND; eddy covariance
Abstract Forests play an important role in climate regulation due to carbon sequestration. However, a deeper understanding of forest carbon flux dynamics is often missing due to a lack of information about forest structure and species composition, especially for non-even-aged and species-mixed forests. In this study, we integrated field inventory data of a species-mixed deciduous forest in Germany into an individual-based forest model to investigate daily carbon fluxes and to examine the role of tree size and species composition for stand productivity. This approach enables to reproduce daily carbon fluxes derived from eddy covariance measurements (R2 of 0.82 for gross primary productivity and 0.77 for ecosystem respiration). While medium-sized trees (stem diameter 30–60 cm) account for the largest share (66%) of total productivity at the study site, small (0–30 cm) and large trees (>60 cm) contribute less with 8.3% and 25.5% respectively. Simulation experiments indicate that vertical stand structure and shading influence forest productivity more than species composition. Hence, it is important to incorporate small-scale information about forest stand structure into modelling studies to decrease uncertainties of carbon dynamic predictions.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24680
Holtmann, A., Huth, A., Pohl, F., Rebmann, C., Fischer, R. (2021):
Carbon sequestration in mixed deciduous forests: the influence of tree size and species composition derived from model experiments
Forests 12 (6), art. 726