Effects of a windthrow disturbance on the carbon balance of a broadleaf deciduous forest in Hokkaido, Japan
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In this paper, the authors measured the CO2 flux using the eddy covariance method in a deciduous broadleaf forest (Japanese white birch, Japanese oak, and castor aralia) where incidental damage by the strong Typhoon Songda in 2004 occurred.Abstract:
. Forests play an important role in the terrestrial carbon balance, with most being in a carbon sequestration stage. The net carbon releases that occur result from forest disturbance, and windthrow is a typical disturbance event affecting the forest carbon balance in eastern Asia. The CO2 flux has been measured using the eddy covariance method in a deciduous broadleaf forest (Japanese white birch, Japanese oak, and castor aralia) in Hokkaido, where incidental damage by the strong Typhoon Songda in 2004 occurred. We also used the biometrical method to demonstrate the CO2 flux within the forest in detail. Damaged trees amounted to 40 % of all trees, and they remained on site where they were not extracted by forest management. Gross primary production (GPP), ecosystem respiration (Re), and net ecosystem production were 1350, 975, and 375 g C m−2 yr−1 before the disturbance and 1262, 1359, and −97 g C m−2 yr−1 2 years after the disturbance, respectively. Before the disturbance, the forest was an evident carbon sink, and it subsequently transformed into a net carbon source. Because of increased light intensity at the forest floor, the leaf area index and biomass of the undergrowth (Sasa kurilensis and S. senanensis) increased by factors of 2.4 and 1.7, respectively, in 3 years subsequent to the disturbance. The photosynthesis of Sasa increased rapidly and contributed to the total GPP after the disturbance. The annual GPP only decreased by 6 % just after the disturbance. On the other hand, the annual Re increased by 39 % mainly because of the decomposition of residual coarse-wood debris. The carbon balance after the disturbance was controlled by the new growth and the decomposition of residues. The forest management, which resulted in the dead trees remaining at the study site, strongly affected the carbon balance over the years. When comparing the carbon uptake efficiency at the study site with that at others, including those with various kinds of disturbances, we emphasized the importance of forest management as well as disturbance type in the carbon balance.read more
Citations
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Six years of continuous CO 2 eddy-flux measurements over a Danish beech forest
TL;DR: In this article, a long-term monitoring station for fluxes of CO 2 and water vapour has been established in an 80-year old beech forest in Denmark, which has been in continuous operation since June 1996 and will be so at least to the end of 2002.
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A spatially explicit database of wind disturbances in European forests over the period 2000–2018
Giovanni Forzieri,Matteo Pecchi,Marco Girardello,Achille Mauri,Marcus Klaus,Christo Nikolov,Marius Rüetschi,Barry Gardiner,Julián Tomaštík,David Small,Constantin Nistor,Donatas Jonikavicius,Jonathan Spinoni,Luc Feyen,Francesca Giannetti,Rinaldo Comino,Alessandro Wolynski,Francesco Pirotti,Fabio Maistrelli,Ionut Savulescu,Stephanie Wurpillot-Lucas,Stefan Karlsson,Karolina Zięba-Kulawik,Paulina Strejczek-Jazwinska,Martin Mokroš,Stefan Franz,Lukas Krejci,Ionel Haidu,Mats Nilsson,Piotr Wężyk,Filippo Catani,Yiying Chen,Sebastiaan Luyssaert,Gherardo Chirici,Alessandro Cescatti,Pieter S. A. Beck +35 more
TL;DR: For example, Forzieri et al. as discussed by the authors presented a new database of wind disturbances in European forests (FORWIND), comprised of more than 80,000 areas in Europe that were disturbed by wind in the period 2000-2018 and describes them in a harmonized and consistent geographical vector format.
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TL;DR: In this paper, a seven-year CO2-flux dataset measured in a 70 year old spruce monoculture is presented, of which 22% was deforested three years after the start of the measurements to accelerate regeneration towards natural deciduous vegetation.
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Sensitivity analysis of the typhoon disturbance effect on forest dynamics and carbon balance in the future in a cool-temperate forest in northern Japan by using SEIB-DGVM
TL;DR: In this article, a dynamic vegetation model was adapted to a deciduous-coniferous mixed forest in southern Hokkaido, Japan, to represent the development of a larch plantation established in 1954 after typhoon Toyamaru struck a natural forest and the natural regeneration from 2004 when the plantation suffered windthrow by typhoon Songda.
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Distributions and sources of low-molecular-weight monocarboxylic acids in gas and particles from a deciduous broadleaf forest in northern Japan
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TL;DR: In this article, the distributions and sources of low-molecular-weight monocarboxylic acids (monoacids) in the forest ecosystem were investigated.
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