The journal “Notre Forêt” of the Regional Forest Ownership Center Ile-de-France Centre-Val de Loire has just published an article presenting the OPTMix device and the first results obtained about the effects of tree mixing on tree growth, water resource, mineral nutrition and biodiversity. Korboulewsky, N., P. Balandier, Y. Dumas, M. Gosselin, A. Marell and T. …
Category: Non classé
Oct 10
Article published: Stand growth and structure of mixed-species and monospecific stands of Scots pine (Pinus sylvestris L.) and oak (Q. robur L., Quercus petraea (Matt.) Liebl.) analysed along a productivity gradient through Europe
An article has just been published in the journal “European Journal of Forest Research” about stand growth and structure of mixed and monospecific stands of Scots pine and Sessile oak. This work was based on plots set up along a productivity gradient in Europe. OPTMix is one of the plots used in this study. Pretzsch, …
Jul 23
New measurements of soil water content with a neutron probe
On 1 and 2 July 2019, new measurements of soil water content were carried out by Cyril Dejean (Irstea G-EAU unit in Montpellier) on the OPTMix plots using a neutron probe. This work was carried out under intermediate soil moisture conditions in order to complete the range of measurements required to calibrate the soil water …
Jul 16
Set up of 144 automatic band dendrometers
144 automatic band dendrometers (DRS26 SDI12 sensor, Environmental Measuring Systems) are being installed in low and medium density plots. These sensors will allow us to follow trees response to drought and other stressful events (pathogen attack for example) and to compare the species response (sessile oak and Scots pine) according to stand density and stand …
Jun 25
UR SOLS research unit came to visit OPTMix on June 24, 2019
30 people from INRA’s UR SOLS (https://www6.val-de-loire.inra.fr/ur-sols) research unit came to visit the OPTMix experimental plots on June 24, 2019. After a general presentation by Philippe Balandier, the scientific studies were presented in little workshops: Water resource and sensors (Jordan Bello and Camille Couteau); Tree growth and biodiversity (Thomas Pérot and Marion Gosselin); Understorey dynamics, …
Jun 14
Article published: Effects of wild ungulates on birds’ nesting failure
An article has just been published in the journal “Forest Ecology Management” about the direct and indirect effects of wild ungulates (roe deer, red deer and wild boar) on forest birds’ nesting failure. The study was conducted as part of a Master 2 internship by Amanda Cocquelet in connection with the COSTAUD research project (Contribution …
May 21
Article published: Transmitted light as a tool to monitor tree leaf phenology and development applied to Quercus petraea
An article has just been published in the “Agricultural and Forest Meteorology” journal on how transmittance could be used to monitor tree leaf phenology and development for sessile oak (Quercus petraea). Perot, T., P. Balandier, C. Couteau, S. Perret, V. Seigner and N. Korboulewsky (2019). “Transmitted light as a tool to monitor tree leaf phenology …
Mar 21
The role of bryophytes and wild ungulates in forest regeneration (Laura Chevaux phd project)
During the thesis project of Laura Chevaux (Irstea Nogent-sur-Vernisson), new regeneration monitoring and bryophyte surveys will be carried out on the OPTMix system in 2019. Philippe Balandier and Anders Marell supervise the thesis, on the role of bryoflore in the network of forest interactions and the implications for the coexistence of woody species. The objective …
Mar 13
INRA Orléans visits OPTMix on March 5, 2019.
As part of the merger between INRA and Irstea, about forty people from INRA Orleans came to visit OPTMix plots on March 5, 2019.
Mar 13
LAI measurements with the needles method
As part of thesis project of Maxime Brière (thesis 2019-2021 supervised by Eric Dufrêne, UMR ESE), LAI estimates in oak mono-specific plots were carried out on February 12, 2019. The LAI of the plots was estimated with the needles method which consists in counting the number of fallen leaves of the year on the ground …
