It cannot be stressed enough: More than 100 participants from 22 countries gathered in the Polish forest to attend the SNEP (Association of Independent Firefighting…
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By Jonas Simons and Bart Muys (KU Leuven)
Imagine you are responsible for a large, forested area in Europe. Will you manage it, or let nature run its course? If you decide to manage your forest, what would be the consequences? Would it store more carbon? Would it use its resources more efficiently, or produce more wood? What about biodiversity conservation? Would the unmanaged choice have more bird species? Another factor to consider is the frequency of disturbance events, such as fires and windstorms, which is increasing due to climate change. Since you will want to keep the resilience of your forest high, which management option would contribute better to this goal?
Unfortunately, current research answers these questions ambiguously. The relationships between the management of forests, provisioning of several ecosystem services and resilience to disturbances remain rather unclear. In addition, several of the ecosystem services we expect from forests have trade-offs between each other. The bottom line is: before deciding what to do with your forest, you should know your viable management options (including the decision to not manage), and which consequences different implementation options have on how your forest functions. In Work Package 2 (WP2) of INFORMA, led by KU Leuven, we will investigate this knowledge gap. To do so, we are developing the INFORMA Forest Management Platform: a new, large database that is specifically designed to answer management-related questions for European forests.
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It is Monday, 6 am. My Colleague Patricia and I (working for Land Life Company) are leaving our office in Burgos heading to Ribera de Folgoso (León), where our SUPERB colleagues from CESEFOR Judit and Rocio are waiting for us. Today we will accompany them to collect and place again field recorders in the plots of our Spanish SUPERB demo in Castilla/León.
Within the SUPERB project, we have 12 Demo-areas across Europe. In our Spanish demo we amongst other activities investigate degraded areas after a recent wildfire, and look at different states of forest recovery. In this regard, the aim of the field recorders is to identify different bird and bat species present across all these different recovery levels. Birds and bats play a very important role in many habitats as pollinators, insect controllers, dispersers, “reforesters” by regurgitating, defecating, or burying seeds, and they help the tree to “awake” the seed as it passes through their digestive system. Finally, they are of course indicators of biodiversity. Thus, their presence, or absence, can tell us a lot about the state of our forest.
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For the RESONATE project, my task aims at developing high resolution future forest trajectories and disturbance maps for the European continent. Continental scale modelling always comes along with trade-offs regarding the detailed processes. Taking this into account, we follow a bottom-up approach, where we use detailed information from local process-based forest simulations to train deep neural networks. For this, we collected forest simulations under different climate scenarios from hundreds of locations across Europe, covering large gradients of environmental and climatic conditions. By combining simulations from different regions, we can explore the relationship between forest dynamics and climate signals using deep neural networks. These neural networks learn to represent forest dynamics depending on environmental and climate conditions, allowing us to upscale the forest dynamics to continental scale. We believe that with this approach we will make a step towards better capturing local scale dynamics at the macroscale.
But guess what, forest modeling means we spend most of the time in front of our screen, working on code and data that eventually allow a glimpse into the future of forest ecosystems. Although I spend a lot of my leisure time hiking, cycling and sometimes ski touring in the mountains, professionally I spend very little time in the field. Therefore, I was really happy to join the excursion as part of a conference we organized in Berchtesgaden some months ago. The occasion to go to the field with colleagues who spend a lot of time there and visit the system that I am currently modelling is very special and of course informative. And for me, coming from a macroecology background, it is also particularly important to see gradients in the mountain landscape and discuss their impact on vegetation processes as well as disturbances.
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Every summer we see in the news flames burning down trees and houses, firefighters pouring water on mountain sides. In the winter we see massive windstorms blowing off entire forest landscapes. We read about very small insects that kill millions and millions of trees in few years.
In parallel, we are also observing trees becoming political in Europe. Placed at the core of many policy documents and climatic pledges, forests and their climate mitigation potential are being increasingly recognised as key in the critical achievement of European climate and biodiversity targets, as well as for the many other services they provide to society.
Media and policy attention underline that we urgently need more knowledge and sound research results on how disturbances develop, how they impact European forests and the so-called “ecosystem services” they provide, and how to respond to the seemingly increasing forest disturbance risks. A team of forest researchers from Wageningen University, the European Forest Institute and numerous research institutes across Europe investigated forest disturbances over the past 70 years and can now provide ground-breaking results in the paper “Significant increase in natural disturbance impacts on European forests since 1950” published in the journal “Global Change Biology”.
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Record breaking temperatures, minimal rainfall, drying rivers and burning forests. The news from this summer show how acutely the warming climate is affecting our environment and lives. To me, the damages to forests due to fires, drought and insect outbreaks are particularly worrisome as we as a society are counting on forests to sequester our carbon emissions, to replace the fossil fuel products and to foster biodiversity that is rapidly declining. This concern on the capacity of forests to cope with increased disturbances started years ago and led me to pursue a PhD on forest resilience and how it could be improved with forest management. Now it is time to summarise my work from the last four years.
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How can we increase the sustainability and resilience of our European forests and related value chains in times of climate change? I-Maestro (Innovative forest management…
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by Joshua Brow, University of Vermont
European forests are in trouble. “Not because they’re being lost,” says University of Vermont scientist William Keeton. “Europe, actually, is greener and more heavily forested now than it has been in centuries.” But many of the continent’s forests are suffering major insect outbreaks, forest disease problems, increasing frequencies of wind-storms, and more-intense fires.
To help give forest managers and policymakers new options, Keeton and a large team of European scientists completed an extensive, multi-year study of forests in thirteen countries across the continent.
Their results show that most current forest management in Europe doesn’t imitate the patterns of nature—specifically, the complex patterns created by natural disturbances that leave behind a mosaic of tree types, ages, and sizes; standing and downed dead wood; and highly variable, resilient landscapes.
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How will our forests look like in 20, 50 or even 80 years? Nobody knows for sure, but we forest researchers try to imagine how…
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New Nature Communication on the impact of the 2018 heatwave on trees growing across Central and Atlantic Europe published
Article by Ute Sass-Klaassen, Roberto L. Salomon, Georg von Arx, Kathy Steppe, Patrick Fonti, Roman Zweifel, Richard Peters, and Marcus Lindner
With the DenDrought2018 initiative, an international team of researchers is now able to tell a story about drought stress from the perception of 21 tree species across Europe. Results of their joint effort have now been published in Nature Communications under the title “The 2018 European heatwave led to stem dehydration but not to consistent growth reductions in forests” (doi: 10.1038/s41467-021-27579-9)
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