Göran Wallin has been on sabbatical since April at Yadvinder Mahli's group, Ecosystem lab, University of Oxford, https://www.oxfordecosystems.org

Photos: Outside the Radcliffe camera, section of Bodleian library; Excursion at Wytham woods, the University research forest just outside Oxford; Journal club.

Rwanda TREE that was broadcasted on national Rwandan television to celebrate the launch of the 2022/23 Forest Planting Season. The part about Rwanda TREE 9is 4-5 minutes and starts at 9:10 in the French version (https://youtu.be/568X4EY83WI) and at 24:00 in the Kinyarwandan version (https://youtu.be/Q3XUYAMPIy4).

Dr Maria Wittemann celebrating her new PhD title after a successful defense on 30th September!

Maria is nailing her PhD thesis 'Thermal plasticity and limitations in tropical trees' on 9th September.

Myriam and Brigitte studying photosynthetic heat tolerance using IR lamps and chlorophyll fluorimetry.

Brigitte is making a gas exchange measurement on two leaves from each of the harvested trees, directly after the tree and branch has been cut.

Lots of samples are collected each day on our 1000-tree harvest (20% of the trees in the plantations).

Felicien leading the team on branch/leaf level work at the harvest, here at Sigira site.

Olivier is staring up another sap flow measurement campaign on trees in Makera during the dry period, early June to early September.

Myriam and Brigitte measuring gas exchange of leaves on branches cut (and re-cut under water) from freshly harvested trees.

Felicien separating leaves and wood from sampled branches to estimate whole-tree leaf area and mass.

Athanase measuring the fresh mass of branches.

Some trees were small, others BIG!!! Here the stem base of a five year-old Polycias fulva tree in Rubona, together with Johan's sunglasses.

Partial harvest of 20% of the trees in Rwanda TREE (>1000 trees) began on May 23rd and will last for nine weeks, three at each site. Left: Nkuba (cutting trees), right: Bercare (measuring stems).

Some of us at the dissertation of Johanna Lethin at the University of Gothenburg. Etienne Zibera (to the right) is visiting Sweden to take the course "Plant ecophysiology in a global change perspective".

Installation of soil lysimeter for coming sampling of soil water 18O isotopes to estimate functional rooting depth. Persons working: Etienne Zibera, Göran Wallin and Ntirugulirwa Bonaventure.

Great start of 2022 with three new publications with Rwanda TREE data:

Manishimwe A, Ntirugulirwa B, Zibera E, Nyirambangutse B, Mujawamariya M, Dusenge ME, Bizuru E, Nsabimana D, Uddling J, Wallin G (2022) Warming responses of leaf morphology are highly variable among tropical tree species. Forests 13:219.
(link: https://doi.org/10.3390/f13020219)

Wittemann M, Anddersson MX, Ntirugulirwa B, Tarvainen L, Wallin G, Uddling J (2022) Temperature acclimation of net photosynthesis and its underlying component processes in four tropical tree species. Tree Physiology.
(link: https://doi.org/10.1093/treephys/tpac002)

Crous K, Uddling J, De Kauwe MG (2022) Temperature responses of photosynthesis and respiration in evergreen trees from boreal to tropical latitudes. New Phytologist.
(link: https://doi.org/10.1111/nph.17951)

Etienne Zibera leading the 14th stem growth measurement campaign at all sites, this time also making tree health inspections.

See our new paper in New Phytologist: "Handling the heat – photosynthetic thermal stress in tropical trees" by Tarvainen et al.

Link: https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.17809?af=R

A paper with three Rwanda TREE co-authors was recently published in Nature! Our research contributed valuable Nyungwe data on aboveground C stocks for tropical montane forests.

Link: https://www.nature.com/articles/s41586-021-03728-4?proof=t%25C2%25A0