Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie


Shelf life

CAS and PHP session cookies

Login credentials, session security



Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie


Shelf life


Trace the visitor's route in order to establish visit statistics.

13 months


Store the anonymous ID of the visitor who starts the first time he visits the site

13 months


Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at or by post at :


24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal IN-SYLVA France ONF FCBA CIRAD CNPF OFB Université de Rouen

Home page

The EUCFLUX Network: Comparison of Eucalyptus genetic material under contrasting environmental and silvicultural conditions

Comparison of Eucalyptus genetic material under contrasting environmental and silvicultural conditions
Itatinga municipality, São Paulo State, Brazil (Network's center: 22°58 0 04″S et 48°43 0 40″W)

Tests clonaux eucalyptus


The EUCFLUX network consists of 10 sites located along a gradient with contrasting soils (texture, slope). Each site (~3ha) comprises 16 plots installed between 2009 and 2018, and 9 additional plots installed from 2018 onwards. Each plot was planted with differing Eucalyptus genetic material in a regular grid pattern (3*2 m). The studied genotypes (25 per site) belong to different species of Eucalyptus (E. grandis, E. urophylla, E. camaldulensis, E. longirostrata, E. dunnii, E. pilularis, E. pelita, E. tereticornis) and their hybridses, clones and seminal material. One of the plots is planted with Corymbia citriodora.

Between 2009 and 2018, 8 sites were paired (4 x 2) to ensure the maximum homogeneity of environmental conditions within each pair. Since 2018, the sites within each pair have been managed differently: one in coppice, the other as a regular high stand. This new phase makes it possible to study the two different types of management. Two sites were not paired (called unassociated sites).

The two unassociated sites will be replanted for one, and uncut for the other, so that the behaviour of different Eucalyptus genotypes can be studied at one site far beyond the usual commercial rotation age (the trees will reach the age of 15 at the end of the cycle, while a typical  rotation is only 6 years). The other replanted site will increase the number of sites to study the effects of soil gradients.


The EUCFLUX Network offers the opportunity to quantify the importance of environmental conditions, genome and management for productivity and biogeochemistry in commercial Eucalyptus plantations. The number of genetic materials compared, the size of the individual plots and the quality of the monitoring carried out make this an important network for studies of this type at the global level. The EUCFLUX Network regularly monitors carbon fluxes and storage as well as productivity (carbon allocation, litterfall, gross primary productivity, wood production, soil CO2 emissions, soil carbon). Foliar ecophysiology (photosynthesis, stomatal conductance) and the environmental constraints that determine it, particularly water constraints, are also monitored at some sites for some of the materials. A meteorological station is located at the centre of the network. One of the objectives of the network is to link individual productivity or growth trajectories to simple functional traits both within genotypes (spatial variability) and among different genotypes (inter-genotypes).

Models representingecophysiological processes also provide estimates of water and nutrient consumption and light absorption at different sites and for different materials. Ultimately, this makes it possible to combine observations and simulations to study the resource-use efficiency of different genetic materials. These models must use data from an instrumented site (Eddy-covariance and soil water monitoring) located at the centre of the Network. The network is located in one of the measurement areas of the Venµs satellite (, which will make it possible to assess the potential of this type of new-generation satellite (with high spatial and temporal measurement resolution) to characterize the canopy properties (LAI, leaf angles) of the different Eucalyptus genetic materials.


The network is coordinated by Joannès Guillemot and Guerric Le Maire (CIRAD researchers, UMR Eco&Sols, based in Brazil near to the Network's site). The Network also benefits from the support of Brazilian partners (private and public) to ensure the monthly monitoring operations.

Operations and data access

The network is partly funded by a consortium of Brazilian companies in an inter-professional structure (IPEF, Therefore,  sharing raw data for scientific cooperation is subject to the agreement of these partners. The Networ carries out many measurements at different time steps (from bi-weekly to annual). The work includes dendrometric inventory campaigns, biomass measurements, litter collection and weighing, as well as measurements carried out with specific equipment (see last section).

Data access  and cost

The network encourages and facilitates scientific cooperation of all durations and budgets as much as possible. For further information, contact the Network coordinators directly.

The minimum cost of standard maintenance and monitoring at the Network (i.e., excludinglarger punctual measurement campaigns) is estimated at 60 k€ per year.

Available measurements

For some sites: micrometeorological stations, soil water content, water table height, soil temperature, soil CO2 emission (Li-8100, Li-COR®), flow tower, measurement of foliar ecophysiology (Li-6400, Li-COR®)