2023
Predicting soil organic carbon stocks in different layers of forest soils in the Czech Republic
SARKODIE, Vincent Yaw Oppong; Radim VASAT; Nastaran POULADI; Vit SRAMEK; Milan SÁŇKA et al.Základní údaje
Originální název
Predicting soil organic carbon stocks in different layers of forest soils in the Czech Republic
Autoři
SARKODIE, Vincent Yaw Oppong; Radim VASAT; Nastaran POULADI; Vit SRAMEK; Milan SÁŇKA; Vera FADRHONSOVA; Katerina Neudertova HELLEBRANDOVA a Lubos BORUVKA
Vydání
Geoderma Regional, AMSTERDAM, Elsevier B.V. 2023, 2352-0094
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
40104 Soil science
Stát vydavatele
Nizozemské království
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 3.100
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14310/23:00131498
Organizační jednotka
Přírodovědecká fakulta
UT WoS
EID Scopus
Klíčová slova anglicky
Cambisol; Climate change; Cubist; Digital soil mapping; Forest soils; Machine learning; Random forests
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 25. 8. 2023 11:14, Mgr. Michaela Hylsová, Ph.D.
Anotace
V originále
Carbon dioxide, the most produced anthropogenic greenhouse gas, could be moderated by sequestering carbon in forest soils. Forest soils store more carbon than there is in the atmosphere. Thus, the smallest variation in soil carbon levels could trigger a significant change in atmospheric carbon. This study focused on predicting the spatial distribution of carbon stocks within surface organic and mineral topsoil and subsoil layers of the forty-one natural forest areas of the Czech Republic. Cubist and Random Forests machine learning algorithms were employed with a grid search hyper tuning to improve prediction accuracy. We used the five-fold cross-validation to verify the model accuracy using Root Mean Square Error (RMSE), coefficient of determination (R2), and Mean Absolute Error (MAE). Random Forests yielded lower RMSE of 1.10 kg/m2, 3.85 kg/m2, and 4.77 kg/m2 in the surface organic horizon (F + H layer), mineral topsoil (0-30 cm layers) and subsoil horizons (30-80 cm layers), respectively, compared to the RMSE values of Cubist, which were 1.14 kg/m2, 3.90 kg/m2, and 4.91 kg/m2 in the surface organic, mineral topsoil and subsoil horizons, respectively. R2 values of both models were low for all three horizons considered. Random Forests were the preferred algorithm for SOC stock prediction in all layers of the forest soils. Cubist predicted the spatial distribution of SOC stocks with more covariates than Random Forests. Altitude was the most important covariate for the spatial distribution of SOC stocks for both Random Forests and Cubist in all soil horizons considered. High SOC stocks for all soil horizons are spatially concentrated in soil horizons along the country borders in the mountaineous natural forest areas.