Category: Non classé

New experiment (OSCAR project): “How wild ungulates modify the cycle of nutrients and carbon in the forest ?”

At the end of March, a new experiment was set up in the low-density plots in enclosures and exclosures. The project, named OSCAR (“How wild ungulates modify the cycle of nutrients and carbon in the forest”) aims at testing the effect of ungulates on the biogeochemical cycles. We installed ion exchange resins, buried at 8 …

Continue reading

A new experiment is begining: dynamics of degradation of environmental DNA and organic carbon

At the beginning of March, a new manipulation was installed on 3 plots (a triplet pure oak, mixture, pure pine). This experiment is replicated on different sites of the AnaEE network. The project is conducted by collaborators : the eDNA platform and the CEREEP Ecotron IDF, the EcoGeno platform and Lucie Zinger from the IBENS …

Continue reading

A recent study by the MASTIF network sheds new light on seed production by trees

For two years, the OPTMix experiment has contributed with data on seed production to the MASTIF network. The MASTIF Network, Mast Inference and Prediction, ( is a long-term monitoring network with more than 500 plots and crop-count locations across the world, representing decades of intensive field and laboratory work. In a recent article, Michal Bogdziewicz …

Continue reading

Snapshot Europe

Like last year, the OPTMix device participated in the Snapshot Europe initiative in 2022. Snapshot Europe ( is a coordinated and standardized camera trap effort to collect data on mammals across Europe. The initiative is supported by Euromammals and the Max Planck Institute of Animal Behaviour, in partnership with Snapshot USA ( Collaborators sample 10-50 …

Continue reading

Article published: Emerging stability of forest productivity by mixing two species buffers temperature destabilizing effect

An article has just been published in the “Journal of Applied Ecology” journal dealing with the effect of mixing tree species on forest productivity. This article shows that two species mixed stands have a greater productivity stability over time than comparable monospecific stands. Mixed stands would buffer the destabilizing effect of temperatures on growth, which …

Continue reading

Article published: With increasing site quality asymmetric competition and mortality reduces Scots pine (Pinus sylvestris L.) stand structuring across Europe

An article has just been published in the “Forest Ecology and Management” journal dealing with the stand structuring of monospecific Scots pine forests. This article shows that the stand structuring decreases with site quality because of mortality and asymmetric competition processes. The OPTMix plots contributed to the data of this study based on 90 Scots …

Continue reading

A new internship on forest regeneration begins on OPTMix plots

Matias Bentkowski is carrying out his internship at the EFNO unit of INRAE. The aim is to study the impact of summer drought on tree regeneration. The field experiment is done using the OPTMix research facility. It consists of measuring water stress and the annual growth of seedlings of Scots pine and Sessile oak under …

Continue reading

Study of tree crowns complementarity

In mixed forests, complementarity can be expressed by a differentiate use of space between species so that each species makes the best use of the light resource according to its photosynthetic capacities. This spatial differentiation between species is possible thanks to plasticity in crown architecture. Thus many articles report an increase in the extent and …

Continue reading

OPTMix annual meeting: January 25, 27 and 28, 2022

The OPTMix annual meeting will take place on January 25, 27 and 28, 2022 by videoconference. For more information please contact Nathalie Korboulewsky.

OPTMix data usage conditions and agreement and data request form

The data usage conditions and agreement forms and a data request form are available on the following page: Home\Data usage conditions and agreement and data request form\