{"id":2895,"date":"2021-01-15T15:09:13","date_gmt":"2021-01-15T15:09:13","guid":{"rendered":"https:\/\/optmix.efno.fr\/?p=2895"},"modified":"2022-01-06T15:09:58","modified_gmt":"2022-01-06T15:09:58","slug":"article-published-tree-species-identity-drives-soil-organic-carbon-storage-more-than-species-mixing-in-major-two-species-mixtures-pine-oak-beech-in-europe","status":"publish","type":"post","link":"https:\/\/optmix.efno.fr\/?p=2895","title":{"rendered":"Article published: Tree species identity drives soil organic carbon storage more than species mixing in major two-species mixtures (pine, oak, beech) in Europe"},"content":{"rendered":"

An article has been published in the \u201cForest Ecology and Management\u201d journal presenting the influence of tree species and mixture on soil organic carbon storage. Part of the data used in the article comes from the OPTMix plots (see article here<\/a>).<\/p>\n

Osei, R., H. Titeux, K. Bielak, F. Bravo, C. Collet, C. Cools, J.-T. Cornelis, M. Heym, N. Korboulewsky, M. L\u00f6f, B. Muys, Y. Najib, A. Nothdurft, M. Pach, H. Pretzsch, M. del Rio, R. Ruiz-Peinado and Q. Ponette (2021). \u201cTree species identity drives soil organic carbon storage more than species mixing in major two-species mixtures (pine, oak, beech) in Europe.\u201d Forest Ecology and Management 481: 118752.\u00a0https:\/\/doi.org\/10.1016\/j.foreco.2020.118752<\/a><\/p>\n

Highlights<\/strong>:<\/p>\n

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\u2013 We investigated SOC storage in two-species forests and their corresponding monocultures in Europe;<\/dd>\n
\u2013 Tree species identity was the main driver of SOC storage, compared with species mixing;<\/dd>\n
\u2013 Tree species identity influenced SOC storage predominantly in the topsoil layers;<\/p>\n

\u2013 Species mixing effect on deep SOC storage was limited to pine-beech triplets;<\/p>\n

 <\/p>\n

Abstract<\/b>:<\/p>\n

Mixed forests are usually associated with higher aboveground carbon storage compared to the corresponding monocultures but information on the impact of tree species mixing on soil organic carbon (SOC) is still limited. Yet, maximizing SOC storage is crucial for ecosystem C sequestration and many other ecosystem services. This study used a triplet approach (ie. two-species mixed stand and respective pure stands at the same site) to assess the impact of tree species identity and mixing on SOC storage in eight pine-oak, eight pine-beech and five beech-oak triplets in Europe. We sampled the forest floor (FF) and 0\u201340\u00a0cm in the mineral soil per 10\u00a0cm interval. For each triplet type, we fitted basal area (BA) proportion of one component species (for species identity) and a BA-based plot-level True Shannon Diversity index (for species mixing) as explanatory variables for SOC stocks in linear mixed effects models, which included stone content and plot BA as covariates, and site as a random intercept. Considering the total soil depth (FF\u00a0+\u00a00\u201340\u00a0cm), species identity effect on SOC stocks was only significant for pine-beech and pine-oak triplets but explained more variability in SOC stocks than species mixing across triplet types. Species mixing effect was not significant for any triplet type in the total soil depth. While species identity consistently drove SOC storage in the topsoil layers across triplet types, species mixing explained more variability in SOC stocks in the deeper soil layers except for pine-oak triplets. The results showed that species identity is a stronger driver of SOC storage than species mixing. While tree species identity effect was strongly related to a conifers\u00a0vs<\/em>\u00a0broadleaves signature, the drivers behind mixing effects remained elusive. The results suggest that targeted selection of tree species could better enhance SOC storage in European forests than a mere increase in species richness.<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

An article has been published in the \u201cForest Ecology and Management\u201d journal presenting the influence of tree species and mixture on soil organic carbon storage. Part of the data used in the article comes from the OPTMix plots (see article here). Osei, R., H. Titeux, K. Bielak, F. Bravo, C. Collet, C. Cools, J.-T. Cornelis, … <\/p>\n

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