Forest Management

Responsible forest management is key. To safeguard against the loss of biodiversity the management of forests can achieve a great deal as the study in Nature of 2024-4-10 has demonstrated. Reducing hunting by humans in dense tropical forests allows bigger species to survive and thrive compared to forests with easy access by roads. FSC certification of forests helps significantly to protect wildlife. The ability to ameliorate biodiversity of forests is assisted by the Forest Stewardship Council (FSC) through the responsible management, preservation and limitation of access to wild forests. This is an important message that in fact it is still possible to preserve wildlife also of larger species if we only really commit to the cause. It is well worth to support such initiatives and monitor the progress. Of course, any such success attracts new hunters and a continuation of the FSC efforts is needed for the benefit of the whole biodiversity on our planet as there is no planet B.

Berlin Zoo 2024


Looking at trees is relaxing. At least this is true for most of us. Some researchers, however, have a stressful time to sort out what it is exactly about trees that causes this impression, perception or feeling. Time to do a few studies on this issue (Lancet RM, 2023). Most likely it is the size or the number, maybe the surface or volume covered by trees that have an impact on us. Maybe it is the sequence of seasons that really causes the pleasant feeling about trees. Perhaps the fresh air, shadow in summertime or more the birds and squirrels or dogs that „inhabit“ the trees in neighborhoods that are important to us. More and more cities really develop sizable programs to care about their green spaces. In a simple cross-sectional study it seems the visibility of trees that is important rather than other effects. More sophisticated second round effects like oxygen levels or meeting points like in rural areas seem not to matter as much in cities currently. The study cited below invites us to devote more consideration to trees which we took for granted for far too long.

Ordóñez, C., Labib, S.M., Chung, L. et al.Satisfaction with urban trees associates with tree canopy cover and tree visibility around the home. npj Urban Sustain 3, 37 (2023).


Wissenschaffende, wie Kunstschaffende, haben ihre Modelle. Meistens sind es abstrakte Gedankengebilde, gerne noch mit schönen mathematischen Formeln verziert. Prototypen haben ihren eigenen Charme. Forschung über das Altern hat es da nicht so leicht seine ästhetischen Modelle auszustellen. Dabei macht uns die Natur einiges vor, wie das geht. Neben dem Axolotl sind Würmer mit nachwachsenden Gliedmaßen vielversprechende Ansätze der Erneuerung im Alternsprozess. Jedes Frühjahr ist die alte Eiche eine inspirierende Quelle der Anpassungsfähigkeit. Hitze, Klimawandel, saurer Regen und Pilze hat sie jahrhundertelang bewältigt. Jedes Frühjahr freuen wir uns über die Zeichen von Vitalität und grüner Pracht. Wiedermal Schädlinge nach Trockenheit abgewehrt und Resilienz bewiesen. Wir möchten es nicht gerne hören. Sie wird uns wohl überleben, dank ihrer Kraft der Ruhe.

Walk after Work

Walking after work is a kind of medicine. Blood pressure calms down about 30 minutes after the walk. Light exposure contributes to higher melatonin levels, which lets us sleep better. Oxygene and humidity purify the office and street dust we inhale during the day. It is largely free of charge for everybody and just needs some appropriate clothing. A rainbow is nice to admire, but it does come with some rain somewhere between the sun, you and the rainbow. The oak trees are admirable kind of trees. In spring they appear like sculptures with numerous branches out of branches. The big one on the photo below has a diameter of 125 cm, pretty senior to the others around. A flowery finish complements the walk after work in spring. As variant of the folk saying, I would suggest: Visiting your favourite tree every day keeps the doctor away. Of course I like my doctor, too.


“Quercus petraea” is the classification name of the sessile oak, the Irish Oak or “chêne sessile” in French, “Eiche” in German. Many European nations cherish their oak trees. It can reach the size bigger than a normal family home and they may live longer than the person who has planted it. Within less than a century, due to industrialisation, most of our more than a century old trees have been lost or used for timber wood. Therefore, it is quite unique to find a reference to a 500 year old oak tree nearby Paris. Despite a fire in this forest 5 years ago (climate change in full action) the old oak tree has survived. Birds around  keep spreading the message that it is worth to preserve nature. We could do it, if we really wanted. Now the oak tree older than the protestant revolution is a rare testimony of the stubbornness of nature to resist.


Spring has sprung, a little bit early in 2023. On the 16th of March in the vicinity of Paris, where Caillebotte designed his impressionist garden. It is still 4 weeks until Easter. The spring flowers will hardly survive until then. Hence, we prepare for an early summer, nice because of less heating, but the vegetation is suffering in the region due to the lack of rain. Hay fever for millions of persons will start early this year as well. The damages from a fire in the nearby forest “Sénart” from 2018 have still not really disappeared. It is expensive and needs a lot of workers, equipment and knowhow to avoid the same old mistakes of planting mono-cultures of trees again. When will they ever learn, when will they ever learn.