NEWS 20.04.2020 Why we paint tree buds Yann Vitasse painted the buds of saplings for an experiment on leaf emergence in spring. He explains why in the blog. 26.03.2020 Beech trees shed their fruit early in times of drought During the 2018 summer drought, beech trees dropped their fruit early. WSL researchers were now able to document this response in forest trees. 19.03.2020 Was the winter too warm for forest trees? Did the warm winter 2019/20 harm forest trees? An experiment at the WSL investigates this question. 27.02.2020 Climate change exacerbates water woes of trees Climate change affects the water conditions in the atmosphere, increasing trees' water stress. WSL researchers are investigating the phenomenon. 26.02.2020 Swiss Forest Protection Service Take a look behind the scenes of our work. What does forest protection mean in practice? Video with subtitles in various languages. 26.02.2020 Second highest bark beetle infestation ever observed In 2019, bark beetle damage reached 1.4 million m3 of spruce wood. This is the second highest level ever recorded apart from the year 2003. 20.02.2020 Trees 'hand down' environmental memories Transmission without alteration of genetic information: trees pass on environmental changes to their offspring, a WSL study has found. 04.02.2020 Protecting old trees as shelters for rare species Numerous organisms rely on deadwood for survival. A new WSL factsheet explains how to recognize and protect those old important trees (in German). 28.01.2020 Too much nitrogen slows forest growth in Europe Airborne nitrogen stimulates tree growth, but a new study has found that this growth is limited by a lack of other nutrients. 14.01.2020 A life dedicated to tree-ring research The dendrochronologist Fritz Schweingruber passed away on 7 January 2020. For almost 50 years, he made an outstanding contribution to the WSL. 01.12.2019 New species of bark beetle in Switzerland Der Nordische Fichtenborkenkäfer ist erstmals in der Schweiz und in Liechtenstein entdeckt worden. Er besiedelt vor allem Fichten. 15.11.2019 Can we still save the ash tree? Two new WSL projects deal with current threats to ash trees in Europe. (In German and French) 30.10.2019 Insect decline is more extensive than suspected The number of insect species has shrunk dramatically in the last decade, according to an international study involving the WSL. 24.10.2019 Summer 2018 report: serious consequences of heat and drought FOEN report with the participation of WSL: People, forests, water bodies and agriculture suffered from the hot and dry summer of 2018. (In German and French) 25.09.2019 Ecophysiologist appointed professor at EPFL and WSL WSL researcher Charlotte Grossiord investigates how global change impacts terrestrial ecosystems. She has been appointed professor at EPFL and WSL.