Climatic water availability modifies tree functional diversity effects on soil organic carbon storage in European forests
| Autor: | Richard Osei, Hugues Titeux, Miren del Río, Ricardo Ruiz-Peinado, Kamil Bielak, Felipe Bravo, Catherine Collet, Corentin Cools, Jean-Thomas Cornelis, Lars Drössler, Michael Heym, Nathalie Korboulewsky, Magnus Löf, Bart Muys, Yasmina Najib, Arne Nothdurft, Maciej Pach, Hans Pretzsch, Quentin Ponette |
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| Přispěvatelé: | UCL - SST/ELI/ELIE - Environmental Sciences, European Commission, Université Catholique de Louvain, Osei, Richard, Titeux, Hugues, del Rio, Miren, Ruiz-Peinado, Ricardo, Bielak, Kamil, Bravo, Felipe, Collet, Catherine, Cornelis, Jean Thomas, Drössler, Lars, Heym, Michael, Korboulewsky, Nathalie, Löf, Magnus, Nothdurft, Arne, Pach, Maciej, Pretzsch, Hans, Ponette, Quentin |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | European Journal of Forest Research, (2023) |
| Popis: | 13 Pág. Forest stand and environmental factors influence soil organic carbon (SOC) storage, but little is known about their relative impacts in different soil layers. Moreover, how environmental factors modulate the impact of stand factors, particularly species mixing, on SOC storage, is largely unexplored. In this study, conducted in 21 forest triplets (two monocultures of different species and their mixture on the same site) distributed in Europe, we tested the hypothesis that stand factors (functional identity and diversity) have stronger effects on topsoil (FF + 0–10 cm) C storage than environmental factors (climatic water availability, clay + silt content, oxalate-extractable Al–Alox) but that the opposite occurs in the subsoil (10–40 cm). We also tested the hypothesis that functional diversity improves SOC storage under high climatic water availability, clay + silt contents, and Alox. We characterized functional identity as the basal area proportion of broadleaved species (beech and/or oak), and functional diversity as the product of broadleaved and conifer (pine) proportions. The results show that functional identity was the main driver of topsoil C storage, while climatic water availability had the largest control on subsoil C storage. Functional diversity decreased topsoil C storage under increasing climatic water availability, but the opposite was observed in the subsoil. Functional diversity effects on topsoil C increased with increasing clay + silt content, while its effects on subsoil C were negative at increasing Alox content. This suggests that functional diversity effect on SOC storage changes along gradients in environmental factors and the direction of effects depends on soil depth. The European Union and the National Fund for Scientific Research (Fonds de la recherche scientifique) of Belgium supported this research as part the ERA-Net SUMFOREST project REFORM–Mixed species forest management. Lowering risk, increasing resilience (www.reform-mixing.eu). The lead author was further supported by Université catholique de Louvain for covid-19-related delays of his PhD project. Some of the triplets were selected, established and measured with funding from the EuMIXFOR FP1206 Cost Action project. The Polish State Forests Enterprise also supported one of the Polish co-authors (Grant No: OR.271.3.15.2017). The Orléans site, OPTMix was installed thanks to ONF (National Forest Service, France), belongs to research infrastructure ANAEE-F; it is also included in the SOERE TEMPO, ZAL (LTSER Zone Atelier Loire) and the GIS Coop network. |
| Databáze: | OpenAIRE |
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