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Full text of this article is only available in PDF format.

Thomas Wutzler (email)

Effect of the aggregation of multi-cohort mixed stands on modeling forest ecosystem carbon stocks

Wutzler T. (2008). Effect of the aggregation of multi-cohort mixed stands on modeling forest ecosystem carbon stocks. Silva Fennica vol. 42 no. 4 article id 232. https://doi.org/10.14214/sf.232

Abstract

Studies of the carbon sink of forest ecosystems often stratify the studied stands by the dominating species and thereby abstract from differences in the mixed-species, multi-cohort structure of many forests. This case study infers whether the aggregation of forestry data introduces a bias in the estimates of carbon stocks and their changes at the scale of individual stands and the scale of a forest district. The empirical TreeGrOSS-C model was applied to 1616 plots of a forest district in Central Germany to simulate carbon dynamics in biomass, woody debris, and soil. In a first approach each stand was explicitly simulated with all cohorts. In three other approaches the forest inventory data were aggregated in several ways, including a stratification of the stands to 110 classes according to the dominating species, age class, and site conditions. A small but significant bias was confirmed. At stand scale the initial ecosystem carbon stocks by the aggregated approach differed from that of the detailed approach by 2.3%, but at the district scale only by 0.05%. The differences in age between interspersed and dominant cohorts as well as differences in litter production were important for the differences in initial carbon stocks. The amounts of wood extracted by thinning operations were important for the differences in the projection of the carbon stocks over 100 years. Because of the smallness of bias, this case study collects evidence that the approaches, that represent stands or stratums by a single cohort, are valid at the scale of a forest district or larger.

Keywords
stand structure; thinning; inventory; scale; model; stratification; bias; inventorystand structure

Author Info
  • Wutzler, Max Planck Institute for Biogeochemistry, Hans Knöll Str. 10, DE-07745, Jena, Germany E-mail thomas.wutzler@bgc-jena.mpg.de (email)

Received 13 June 2007 Accepted 18 July 2008 Published 31 December 2008

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Available at https://doi.org/10.14214/sf.232 | Download PDF

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Kalliovirta J., Tokola T. (2005) Functions for estimating stem diameter and tree .. Silva Fennica vol. 39 no. 2 article id 386
Repo T., Laukkanen J. et al. (2005) Measurement of the tree root growth using electr.. Silva Fennica vol. 39 no. 2 article id 380
Bolkesjø T. F., (2005) Projecting pulpwood prices under different assum.. Silva Fennica vol. 39 no. 1 article id 399
Mehtätalo L., (2005) Height-diameter models for Scots pine and birch .. Silva Fennica vol. 39 no. 1 article id 395
Calama R., Montero G. (2005) Multilevel linear mixed model for tree diameter .. Silva Fennica vol. 39 no. 1 article id 394
Sterba H., (2004) Equilibrium curves and growth models to deal wit.. Silva Fennica vol. 38 no. 4 article id 409
Jutras S., Hökkä H. et al. (2003) Modeling mortality of individual trees in draine.. Silva Fennica vol. 37 no. 2 article id 504
Ihalainen M., Salo K. et al. (2003) Empirical prediction models for Vaccinium myrtil.. Silva Fennica vol. 37 no. 1 article id 513
Dzierzon H., Sievänen R. et al. (2003) Enhanced possibilities for analyzing tree struct.. Silva Fennica vol. 37 no. 1 article id 510
Vellak K., Paal J. et al. (2003) Diversity and distribution pattern of bryophytes.. Silva Fennica vol. 37 no. 1 article id 508
Pukkala T., Miina J. et al. (2002) Thinning response and thinning bias in a young S.. Silva Fennica vol. 36 no. 4 article id 524
Aphalo P. J., Schoettle A. W. et al. (2002) Leaf life span and the mobility of “non-mobile” .. Silva Fennica vol. 36 no. 3 article id 532
Aalto T., Hari P. et al. (2002) Comparison of an optimal stomatal regulation mod.. Silva Fennica vol. 36 no. 3 article id 529
Nevalainen S., (2002) The incidence of Gremmeniella abietina in relati.. Silva Fennica vol. 36 no. 2 article id 538
Pennanen J., (2002) Forest age distribution under mixed-severity fir.. Silva Fennica vol. 36 no. 1 article id 559
Sironen S., Kangas A. et al. (2001) Estimating individual tree growth with the k-nea.. Silva Fennica vol. 35 no. 4 article id 580
Tomppo E., Korhonen K. T. et al. (2001) Multi-source inventory of the forests of the Heb.. Silva Fennica vol. 35 no. 3 article id 587
Nuutinen T., Kellomäki S. (2001) A comparison of three modelling approaches for l.. Silva Fennica vol. 35 no. 3 article id 586
Rohner M., Böswald K. (2001) Forestry development scenarios: timber productio.. Silva Fennica vol. 35 no. 3 article id 585
Nyström K., Ståhl G. (2001) Forecasting probability distributions of forest .. Silva Fennica vol. 35 no. 2 article id 595
Zucchini W., Schmidt M. et al. (2001) A model for the diameter-height distribution in .. Silva Fennica vol. 35 no. 2 article id 594
Minkkinen K., Laine J. et al. (2001) Tree stand development and carbon sequestration .. Silva Fennica vol. 35 no. 1 article id 603
Kangas J., Leskinen P. et al. (2000) Integrating timber price scenario modeling with .. Silva Fennica vol. 34 no. 4 article id 621
Daume S., Robertson D. (2000) A heuristic approach to modelling thinnings Silva Fennica vol. 34 no. 3 article id 628
Nuutinen T., Hirvelä H. et al. (2000) The role of peatlands in Finnish wood production.. Silva Fennica vol. 34 no. 2 article id 636
Lexer M. J., Hönninger K. et al. (2000) The sensitivity of central European mountain for.. Silva Fennica vol. 34 no. 2 article id 635
Lindner M., Lasch P. et al. (2000) Alternative forest management strategies under c.. Silva Fennica vol. 34 no. 2 article id 634
Heikkinen V.-P., Kanto A. (2000) Market model with long-term effects – empirical .. Silva Fennica vol. 34 no. 1 article id 645
Koskela J., (2000) A process-based growth model for the grass stage.. Silva Fennica vol. 34 no. 1 article id 640
Vettenranta J., Miina J. (1999) Optimizing thinnings and rotation of Scots pine .. Silva Fennica vol. 33 no. 1 article id 671
Vettenranta J., (1999) Distance-dependent models for predicting the dev.. Silva Fennica vol. 33 no. 1 article id 670
Hökkä H., Penttilä T. (1999) Modelling the dynamics of wood productivity on d.. Silva Fennica vol. 33 no. 1 article id 668
Pasanen K., (1998) Integrating variation in tree growth into forest.. Silva Fennica vol. 32 no. 1 article id 697
Kogler C., Rauch P. (2018) Discrete event simulation of multimodal and unim.. Silva Fennica vol. 52 no. 4 article id 9984
Henry M., Picard N. et al. (2011) Estimating tree biomass of sub-Saharan African f.. Silva Fennica vol. 45 no. 3B article id 38
Groot A., Gauthier S. et al. (2004) Stand dynamics modelling approaches for multicoh.. Silva Fennica vol. 38 no. 4 article id 411
Givnish T. J., (2002) Adaptive significance of evergreen vs. deciduous.. Silva Fennica vol. 36 no. 3 article id 535
Frey J., Schindler Z. et al. (2025) The 3D reconstruction of wood and leaves from te.. Silva Fennica vol. 59 no. 1 article id 24027
Hovi A., Lukeš P. et al. (2022) Small geographical variability observed in Norwa.. Silva Fennica vol. 56 no. 2 article id 10683
Miina J., Kurttila M. (2022) A model for the sap yield of birches tapped by c.. Silva Fennica vol. 56 no. 2 article id 10679
Kuusinen N., Hovi A. et al. (2021) Contribution of woody elements to tree level ref.. Silva Fennica vol. 55 no. 5 article id 10600
Niemi M. T., (2021) Improvements to stream extraction and soil wetne.. Silva Fennica vol. 55 no. 5 article id 10557
Matisons R., Šņepsts G. et al. (2018) Dominant height growth of European beech at the .. Silva Fennica vol. 52 no. 1 article id 7818
Turtiainen M., Miina J. et al. (2016) Modelling the coverage and annual variation in b.. Silva Fennica vol. 50 no. 4 article id 1573
Mattila O., Hämäläinen K. et al. (2016) Strategic business networks in the Finnish wood .. Silva Fennica vol. 50 no. 3 article id 1544
Krooks A., Kaasalainen S. et al. (2014) Predicting tree structure from tree height using.. Silva Fennica vol. 48 no. 2 article id 1125
Saksa T., Heiskanen J. et al. (2005) Multilevel modelling of height growth in young N.. Silva Fennica vol. 39 no. 1 article id 403
Leinonen I., Hänninen H. (2002) Adaptation of the timing of bud burst of Norway .. Silva Fennica vol. 36 no. 3 article id 534
Ripatti P., (2000) Use of log-linear models in forecasting structur.. Silva Fennica vol. 34 no. 3 article id 631
Fekedulegn D., Mac Siurtain M. P. et al. (1999) Parameter estimation of nonlinear growth models .. Silva Fennica vol. 33 no. 4 article id 653
Mäkelä A., Givnish T. J. et al. (2002) Challenges and opportunities of the optimality a.. Silva Fennica vol. 36 no. 3 article id 528
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