This year’s TreeNet annual meeting was hosted by Ansgar Kahmen and his group at the Botanical Institute in Basel. Program…
Less growth despite earlier onset
Roman Zweifel
Die Klimaerwärmung verlängert zwar die Vegetationszeit, führt aber nicht zu mehr Holzzuwachs. Bei wichtigen Baumarten in der Schweiz nimmt das…
TreeNet auf waldwissen.net
Roman Zweifel
Wachstum, Wasser, Warnsignale – Echtzeitdaten für den Wald im Klimastress Bäume wachsen vor allem nachts und nur an wenigen Tagen…
Fore[st]cast – Annual Meeting 2025
Roman Zweifel
The 2025 Fore[st]cast annual meeting took place on July 10 at the SDSC headquarters in Oerlikon. Fore[st]cast – Nowcast and…
TreeNetAI – a tool for gap-filling time series data
Roman Zweifel
TreeNetAI enables the filling of data gaps in time series with machine learning. The Python-based tool is freely available. by…
Switzerland has a novel platform for drought warnings
Roman Zweifel
Dry periods are a growing problem in Switzerland for the water, land, and energy sectors, and thus for the general…
TreeNet contributes to the LWF special edition in SZF
Roman Zweifel
The Swiss Forestry Journal has published a special edition to celebrate the 30th anniversary of the Long-Term Forest Ecosystem Research…
TV reportage in nano
Roman Zweifel
TreeNet members contribute to TV documentary The TV format nano (ZDF, SRF, 3-Sat) reports about the record high temperatures in…
Fore(st)cast – Nowcast and predict forest condition
Roman Zweifel
Fore(st)cast is a joint project of WSL and SDSC It combines the advantages of machine learning methods with the ecological…
Annual TreeNet Meeting 2024
Roman Zweifel
This year’s TreeNet annual meeting took place at the WSL in Birmensdorf on November 12, 2024. Program_TreeNet_2024 Find links to…
Stem radius changes do not show a moon signal
Roman Zweifel
Publication in Scientific Reports by Tumajer et al, with TreeNet contribution Dendrometers challenge the ‘moon wood concept’ by elucidating the…
Stillberg Davos – a new partner of TreeNet
Roman Zweifel
Stillberg reforestation site becomes TreeNet’s newest partner Text and photo Esther Frei As part of the EU project FORWARDS (funded…
Wasserdefizite im Wald brauchen Zeit um behoben zu werden
Roman Zweifel
BIRMENSDORF/ZÜRICH: WASSERDEFIZITE IM WALD BRAUCHEN ZEIT UM WIEDER BEHOBEN ZU WERDEN Sofia Pignatelli TreeNet zusammen mit LWF und Waldlabor in…
In einem Sommer der Extreme kam die Schweiz glimpflich davon
Roman Zweifel
In einem Sommer der Extreme kam die Schweiz glimpflich davon Artikel in der NZZ (26.8.2023) über den Sommer 2023 im…
Dead trees around the world are shocking scientists
Roman Zweifel
Dead trees around the world are shocking scientists Forests once deemed resilient are suffering surprising die-offs. To predict the fate…
Tracking the growth of a decapitated tree
Roman Zweifel
When is a tree considered dead? This question renders over 35 000 results with a popular search engine. From amateur…
Towards monitoring stem growth phenology from space
Roman Zweifel
New publication in Agricultural and Forest Meteorology Towards monitoring stem growth phenology from space with high resolution satellite data by…
New Publication in New Phytologist
Roman Zweifel
Daytime stomatal regulation in mature temperate trees prioritizes stem rehydration at night By Richard Peters et al. https://doi.org/10.1111/nph.18964 Summary Trees…
TreeNet in RSI ‘Il giardino di Albert’
Roman Zweifel
Reportage in Swiss Italian TV RSI with input from TreeNet Siccità sotto la lente 2022, l’anno più caldo e asciutto…
Networking the forest infrastructure towards near real-time monitoring – A white paper
Roman Zweifel
New article in the journal Science of The Total Environment on the need to network existing forest monitoring infrastructure to…
TreeNet goes AI
Roman Zweifel
Reconstructing radial stem size changes of trees with machine learning by Mirko Luković (EMPA), Roman Zweifel (WSL), Guillaume Thiry (ETHZ), Ce Zhang…
TreeNet in Swiss Radio SRF News
Roman Zweifel
TreeNet Nowcasts in use Reena Thelly from Swiss Radio SRF interviewed Katrin Meusburger (hydrologist) and Roman Zweifel (ecophysiologist), both WSL,…
‘WaldLab Forest Experimental Site’ is a new partner of TreeNet
Roman Zweifel
The site The “Waldlabor” ecohydrological experimental site is located at Zürich Hönggerberg in close proximity to the ETH Hönggerberg Campus.…
TreeNet 10-year anniversary conference, 27-28 June 2022
Roman Zweifel
The conference On June 27/28, 2022, the TreeNet 10-year anniversary conference was taking place in the Basel region in Switzerland. The conference…
DeepT
Roman Zweifel
deepT – deep neural network algorithms to recognize species and their specific response patterns in stem growth data of TreeNet…
Register now – TreeNet anniversary conference
Roman Zweifel
On June 27/28, 2022, the 10th anniversary event of TreeNet was taking place in the Basel region in Switzerland in…
Publication in Nature Communications
Roman Zweifel
European heatwave led to stem dehydration but not to consistent growth reductions in forests. Drought and growth indicators in the…
A few days determine the growth of temperate trees
Roman Zweifel
Publication in Ecology Letters A few days determine the growth of temperate trees – In addition to high soil moisture and…
TreeNet Annual Meeting 2021
Roman Zweifel
TreeNet Annual Meeting 2021 The TreeNet community met on 18 November 2021 in Ittigen/Bern for its annual meeting. This time,…
TreeNet is nowcasting
Roman Zweifel
Near real-time predictions of tree growth and water deficit TreeNet now produces daily nowcasts of tree growth and water deficit…
Nitrogen deposition – at what point is it too much for tree growth?
Roman Zweifel
Publication in Wald & Holz (in German) Nitrogen is a nutrient that would naturally be in short supply in most…
TreeNet – The biological drought and growth indicator network
Roman Zweifel
New paper out about the TreeNet infrastructure in Frontiers The paper in Frontiers TreeNet – The biological drought and growth indicator…
TreeNet in the media July 2021
Roman Zweifel
The rainy period raised the question of what happens to forest trees during this wet summer. TreeNet gave some answers…
TreeNet in the media – June 2021
Roman Zweifel
The New Phytologist article ‘Why trees grow at night’, based on TreeNet data (2011-2018), has received a lot of attention…
Publication in New Phytologist – Why trees grow at night
Roman Zweifel
The timing of diel stem growth of mature forest trees is still largely unknown, as empirical data with high temporal…
Publication in FORESTS – treenetproc
Roman Zweifel
Radial stem size changes, measured with automated dendrometers at intra-daily resolution, offer great potential to link environmental conditions with tree physiology…
TreeNet Annual Meeting 2020
Roman Zweifel
The TreeNet Annual Meeting 2020 is history. Thanks to everybody who contributed to make this a successful (virtual) event! ProgramTNAM2020
Dataset ‘irrigation experiment Pfynwald’ to download
Roman Zweifel
The dataset associated to the recent publication in New Phytologist ‘Determinants of legacy effects in pines – implications from an…
Article in New Phytologist – Determinants of legacy effects in pines
Roman Zweifel
Tree responses to altered water availability range from immediate (e.g. stomatal regulation) to delayed (e.g. crown size adjustment). The interplay of…
TreeNet – wann wachsen unsere Bäume?
Roman Zweifel
TreeNet – wann wachsen unsere Bäume? R. Zweifel, S. Etzold, L. Walthert, R. Köchli, W. Eugster Der radiale Stammzuwachs von Holz…
TreeNet in Waldschutzüberblick 2019
Roman Zweifel
TreeNet zeigt erste Daten zum radialen Baumwachstum im Jahr 2019 im Waldschutzüberblick 2019
TreeNet in the News
Roman Zweifel
Wald & Holz TreeNet – Wann wachsen unsere Bäume? Der radiale Stammzuwachs von Holz und Rinde von Bäumen kann bis…
TreeNet – am Puls der Bäume in Wald & Holz
Roman Zweifel
TreeNet – am Puls der Bäume R. Zweifel, S. Etzold, S. Braun, R. Köchli, G. Hoch, W. Eugster, L. Walthert* Im Forschungs-Netzwerk TreeNet werden…
How did Swiss forest trees respond to the hot summer 2015?
Roman Zweifel
Susanne Burri, Elena Haeler, Werner Eugster, Matthias Haeni, Sophia Etzold, Lorenz Walthert, Sabine Braun, Roman Zweifel Download article Central Europe…
First preliminary results about the effects of the drought summer 2018 on forest trees
Roman Zweifel
Tree water deficit (TWD) The extremely dry summer 2018 left clear effects in forest trees. Trees at about 25 of…
TV-Report in RTS 1
Roman Zweifel
La mise au point: La canicule tue nos forest? TreeNet contributes scientific information about the damages induced by the drought…
TreeNet – comprehensive report about the first five years of measurement is out
Roman Zweifel
Etzold, S.; Zweifel, R., 2018: TreeNet – Daten und Analysen der ersten fünf Messjahre. Mit Beiträgen von: Haeni, M.; Burri,…
Current drought effects on forest trees in Switzerland (5)
Roman Zweifel
Rain over the weekend reduced the tree water deficit (TWD) in most trees of all species. However, we are far…
Current drought effects on forest trees in Switzerland (4)
Roman Zweifel
Drought intensity reaches a new (last?) peak in this summer. Forest trees of all regions investigated are heavily affected according…
Current drought effects on forest trees in Switzerland (3)
Roman Zweifel
Drought in Switzerland is further intensifying. Particularly forest trees in the lowlands (Mittelland) show steadily increasing tree water deficit-induced stem…
Current drought effects on forest trees in Switzerland (2)
Roman Zweifel
Rain over the weekend brought some stress relief to forest trees in Switzerland, particularly in the Northern Alps and in…
Current drought effects on forest trees in Switzerland (1)
Roman Zweifel
Trees in the Northern Alps and in the Valais show distinctly higher tree water deficit-induced stem shrinkage (TWD) than in…
Quickviews of current raw data available
Roman Zweifel
TreeNet raw data of the past five days are freely browsable. Try the following links to see the latest data…
Are there growth trends of the Swiss tree species over the past 5 years?
Roman Zweifel
We are currently analyzing the drivers of wood growth of Swiss forest trees over the past five years (preliminary results).…
We are moving …
Roman Zweifel
TreeNet.info is moving its data base and the related processing platform to a new server. Please apologize for inconvenience. All…
Are trees able to grow in periods of stem shrinkage?
Roman Zweifel
Publication in New Phytologist about separating stem radius measurements into growth and tree water deficit Link to article Summary Separating continuously measured…
Dendrometer processing tool online now
Roman Zweifel
TreeNet.info offers a public tool to process your own raw dendrometer data now. Your dendrometer data will be aligned, cleaned…
TreeNet in Swiss Newspaper
Roman Zweifel
Wie man die Bäume wachsen hört – Das faszinierende Universum Wald bietet viele Geheimnisse: Seiner komplexen Natur sind Wissenschaftler nun…
When do trees grow (3)?
Roman Zweifel
Radial stem growth of trees (GRO) occurs mainly during the night. Daylight hours show systematically lower growth. The columns in…
When do trees grow (2)?
Roman Zweifel
Tree species have their specific climatic niches in which they grow. Norway spruce at the subalpine site Seehornwald Davos grows…
When do trees grow (1)?
Roman Zweifel
Radial stem growth of trees is limited to a relatively short time period of the year in spring and summer.…
Radial stem variations in PCE
Roman Zweifel
Radial stem variations – a source of tree physiological information not fully exploited yet by Roman Zweifel (Plant, Cell and…
Hitzewelle in der Schweiz
Roman Zweifel
Trotz grosser Hitze zeigen die Schweizer Wälder noch keinen generellen Trockenstress. Die Bandbreite des biologischen Trockenstressindikators TWD (‘tree water deficit’)…
TreeNet in Swiss Newspapers
Roman Zweifel
Tierwelt, 4. Juni 2015: Forscher schauen 300 Bäumen beim Wachsen zu (Martina Huber) Südostschweiz, 22. Juni 2015: Dem Wachstum…
New method page
Roman Zweifel
Learn more about the methods TreeNet is developing and using. RZ.
Eleven new TreeNet sites in Switzerland
Roman Zweifel
In collaboration with the research unit Forest Soils and Biogeochemistry of WSL Birmensdorf, TreeNet greatly increases the number of its…
Publication in BioGeoSciences
Roman Zweifel
Zielis S, Etzold S, Zweifel R, Eugster W, Haeni M, Buchmann N. 2014. NEP of a Swiss subalpine forest is…
Publication in New Phytologist
Roman Zweifel
Zweifel R., Eugster W., Etzold S., Dobbertin M., Buchmann N. and Häsler R. 2010. Link between continuous stem radius changes…
