Assessment of organic matter changes in the soil of the Brdo plot under different climate change scenarios through the Yasso07 model application

Eler, Klemen (author), Kobal, Milan (author), Kraigher, Hojka (author), Simončič, Primož (author)

The forest soil can act as an important sink for CO2 and in that respect also appears in the national Kyoto reports, where a distinction is made between carbon accumulated in litter and organic soil horizons and carbon accumulated in mineral soil layers. There is a multitude of dynamic models of organic carbon (Corg) change in the soil particularly due to different environmental and anthropogenic factors. The purpose of this paper is the Yasso07 model application on the “Brdo” plot, which is part of the ICP Forest Level II plots of Slovenia. The Yasso07 model describes the decomposition of organic matter in the forest soil by dividing litter inputs into different components with varying decomposition rates. Here, the temporal change of soil Corg in various scenarios of future climate change (increase in air temperature, change in precipitation) was predicted. The difference between the measured amount and the model-predicted amount of Corg in the soil for the current climate on the Brdo plot is 6.4 t C ha-1 (88.6 t C ha-1 measured vs. 95.0 t C ha-1 predicted). Taking into consideration the climate change scenarios for Slovenia, Corg stock is expected to decrease in the future according to Yasso07 projections in all scenarios of climate change. The estimate of 100-year decrease of Corg is the largest for scenario, when large increase of both temperature and precipitation is expected (18.2%) and smallest when small temperature increase and precipitation decrease are predicted (9.3%). Assuming stable litter input, larger influence on Corg decrease was predicted for the temperature change compared to precipitation change. However, many uncertainties are included in model estimates ranging from litter input estimates, climate change uncertainties, climate-litter production feedbacks, starting value estimates, etc. The determination of the uncertainty of model calculations is a requirement for conducting simulations and their interpretation.

• Language: English
• Work type: Scientific work
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Year: 2014
• Number of pages: Str. 21-34
• Numbering: [Št.] 103
• PID: 20.500.12556/RUL-82891
• UDC: 630*11(497.4Brdo)(045)=111
• ISSN on article: 2335-3112
• COBISS.SI-ID: 3918246
• Publication date in RUL: 18.08.2016

Record is a part of a journal

• Title: Acta Silvae et Ligni
• Publisher: Gozdarski inštitut Slovenije, založba Silva Slovenica, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
• ISSN: 2335-3112
• COBISS.SI-ID: 266761216

Secondary language

• Language: Slovenian
• Title: Ocena sprememb organske snovi v tleh na ploskvi Brdo glede na različne scenarije podnebnih sprememb z uporabo modela Yasso07
• Keywords: razgradnja opada, sestava opada, ogljik v tleh, Slovenija