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Forest Entomology

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Our group Forest Entomology investigates forest insects in their broadest sense: ecology of potential forest pests, natural enemies, diversity of forest insects.

Research topics

Infestation dynamics of bark beetles, effect of natural enemies
Interactions between host trees and bark beetles
Recolonization of windthrow and wildfire areas by insect communities
Dependency of dead wood (saproxylic) insects on tree and stand characteristics

FURTHER INFORMATION

News

The field season has started!

In March, the insect traps for the Lothar project were installed so that early flying insects could also be detected.

Open master thesis

In this master thesis, we want to investigate how land-use intensification, which is one of the major drivers of ongoing biodiversity loss, affects the functional composition of herbivorous insect communities in forests.

Further Information (PDF)

The larch tortrix is back

Nearly 40 year after the last major outbreak of the larch tortix (Zeiraphera griseana) in the Upper Engadine, large-scale defoliation of larches due to the larvae of the larch tortrix could be observed this year. Beat Wermelinger reported in Swiss television (in German).

Projects

DEFENDASH

Ash is currently suffering from Ash dieback ADB and a new threat, the Emerald Ash Borer EAB, is spreading towards Central Europe. The project aims at understanding the milti-trophic interactions between different ash genotypes, ADB, EAB and its natural enemies under different climatic conditions.

Nightscapes 2019

Wir untersuchen die relativen Auswirkungen verschiedener spektraler LED-Strassenleuchten und bedarfsorientierter Beleuchtungssysteme auf acht Insekten- und Fledermaus-Artengruppen.

SURVIVASH

Testing tolerant Swiss ash trees against new pests

Biomass-decomposition of Douglas-fir

The influence of the Douglas fir on ecological processes in the forest has not yet been sufficiently studied. The aim of the cooperation project (HAFL, WSL, University of Göttingen) is to create the scientific basis for an evaluation of Douglas fir cultivation with regard to biomass degradation and functional biodiversity.

FORClimateS

The project aims to aggregate and synthesize existing information on different spatial and temporal scales to provide decision-makers with relevant and robust information on short- and long-term risks for forests and forest functions and on adaptation strategies under different climate futures

Ash Dieback in Switzerland

In Europe, the Ash Dieback disease caused by Hymenoscyphus fraxineus has led to high mortality rates of common ash. We analyze how radial growth and wood anatomical parameters influence the disease progression in trees.

Reconnaître les dendro-microhabitats: visite virtuelle immersive d'une forêt

Les dendro-microhabitats sont importants pour la biodiversité en forêt. Ce projet élabore un nouvel outil destiné aux gestionnaires forestiers, afin de les aider à identifier les dendro-microhabitats et connaître leurs rôles écologiques.

ISOWEB

Our objective is to develop a protocol to analyse food webs in deadwood using compound-specific stable isotope analyses. The applicability to track changes in foodwebs between tree species and different management types along deadwood decomposition will be tested using data from a large experiment.

Energy flux through ecological networks

One of the main drivers of the ongoing loss of biodiversity and the provisioning of important ecosystem functions is nutrient enrichment due to increased fertilizer use in agriculture and fossil fuel combustion. In this project we aim to assess energy fluxes through ecological food webs as an independent measure of ecosystem functioning on an island system in lakes in northern Sweden.

Saproxylic beetles in forest reserves

Deadwood is an essential habitat for many organisms. We investigate the saproxylic (deadwood-inhabiting) beetles and fungi in beech forest reserves and comparable managed forests.

FuncNet

We study effects of land-use in grasslands and forests on functional plant-insect networks and consequences for ecosystem processes

Impact of fuel wood piles on saproxylic beetles

In Switzerland, a strong increase in the demand for energy wood is expected for the next decades. This is likely to have a strong influence on saproxylic beetles (dependent on dead wood). On the one hand, fewer old trees and less deadwood will remain and decompose in the forest, which directly limits habitat availability for saproxylics. On the other hand, fuel wood exploitation might have indirect ecological consequences.

Wild fire and insects

In 2003 some 300 ha of forest on the hillside above Leuk burnt down. Along a horizontal gradient from within-forest to the center of the fire area and along an altitudinal gradient from 1200 to 1700 m a.s.l. we investigate the process of colonization by insects and the succession of the taxonomic and functional groups.

Distribution of red wood ants

We investigate the requirements and distribution of red wood ants in Switzerland. On each plot of the Swiss National Forest Inventory presence/absence and size of the nest mounds are recorded.

Bark Beetle Modeling

The most important forest insect in Europe, i.e. the bark beetle Ips typographus, is likely to become even more important with climate change. In this project, we evaluate the driving factors of recent bark beetle infestations by means of statistical modeling and develop bark beetle population and tree susceptibility models for infestation risk analysis.

Dynamics of dead wood and saproxylic insects

Dead wood is a vital prerequisite for a quarter of all organisms living in a forest. The future intensification of forest management will pose a threat to many wood inhabiting (saproxylic) insect species. In forest reserves the formation and decay process of dead wood is quantified and the importance of micro-habitats for saproxylic beetles is investigated.

Windthrow fauna

After the devestating windstorms in 1990 (Vivian) and 1999 (Lothar) investigations were started to monitor the development and succession of the insect fauna on cleared and uncleared windthrow areas, relative to control treatments in the intact forest. Until now, insects have been sampled during 7 (Vivian) and 4 (Lothar) years.

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Publications

Vogel, S.; Gossner, M.M.; Mergner, U.; Müller, J.; Thorn, S., 2020: Optimizing enrichment of deadwood for biodiversity by varying sun exposure and tree species: an experimental approach. Journal of Applied Ecology, doi: 10.1111/1365-2664.13648

Schall, P.; Heinrichs, S.; Ammer, C.; Ayasse, M.; Boch, S.; Buscot, F.; Fischer, M.; Goldmann, K.; Overmann, J.; Schulze, E.; Sikorski, J.; Weisser, W.W.; Wubet, T.; Gossner, M.M., 2020: Can multi‐taxa diversity in European beech forest landscapes be increased by combining different management systems?. Journal of Applied Ecology, 57, 7: 1363-1375. doi: 10.1111/1365-2664.13635

Gossner, M.M.; Gazzea, E.; Diedus, V.; Jonker, M.; Yaremchuk, M., 2020: Using sentinel prey to assess predation pressure from terrestrial predators in water-filled tree holes. European Journal of Entomology, 117: 226-234. doi: 10.14411/eje.2020.024

Bolliger, J.; Hennet, T.; Wermelinger, B.; Blum, S.; Haller, J.; Obrist, M.K., 2020: Low impact of two LED colors on nocturnal insect abundance and bat activity in a peri-urban environment. Journal of Insect Conservation, 24, 4: 625-635. doi: 10.1007/s10841-020-00235-1

Büntgen, U.; Liebhold, A.; Nievergelt, D.; Wermelinger, B.; Roques, A.; Reinig, F.; Krusic, P.J.; Piermattei, A.; Egli, S.; Cherubini, P.; Esper, J., 2020: Return of the moth: rethinking the effect of climate on insect outbreaks. Oecologia, doi: 10.1007/s00442-019-04585-9

Habel, J.C.; Gossner, M.M.; Schmitt, T., 2020: What makes a species a priority for nature conservation?. Animal Conservation, 23, 1: 28-35. doi: 10.1111/acv.12512

Neff, F.; Resch, M.C.; Marty, A.; Rolley, J.D.; Schütz, M.; Risch, A.C.; Gossner, M.M., 2020: Long‐term restoration success of insect herbivore communities in semi‐natural grasslands: a functional approach. Ecological Applications, doi: 10.1002/eap.2133

Petermann, J.S.; Roberts, A.L.; Hemmerling, C.; Bajerski, F.; Pascual, J.; Overmann, J.; Weisser, W.W.; Ruess, L.; Gossner, M.M., 2020: Direct and indirect effects of forest management on tree-hole inhabiting aquatic organisms and their functional traits. Science of the Total Environment, 704: 135418 (13 pp.). doi: 10.1016/j.scitotenv.2019.135418

Roth, N.; Zoder, S.; Zaman, A.A.; Thorn, S.; Schmidl, J., 2020: Long-term monitoring reveals decreasing water beetle diversity, loss of specialists and community shifts over the past 28 years. Insect Conservation and Diversity, 13, 2: 140-150. doi: 10.1111/icad.12411

Watling, J.I.; Arroyo-Rodríguez, V.; Pfeifer, M.; Baeten, L.; Banks-Leite, C.; Cisneros, L.M.; Fang, R.; Hamel-Leigue, A.C.; Lachat, T.; Leal, I.R.; Lens, L.; Possingham, H.P.; Raheem, D.C.; Ribeiro, D.B.; Slade, E.M.; Urbina-Cardona, J.N.; Wood, E.M.; Fahrig, L., 2020: Support for the habitat amount hypothesis from a global synthesis of species density studies. Ecology Letters, 23, 4: 674-681. doi: 10.1111/ele.13471

Castagneyrol, B.; Valdés-Correcher, E.; Bourdin, A.; Barbaro, L.; Bouriaud, O.; Branco, M.; Centenaro, G.; Csóka, G.; Duduman, M.; Dulaurent, A.; Eötvös, C.B.; Faticov, M.; Ferrante, M.; Fürjes-Mikó, Á.; Galmán, A.; Gossner, M.M.; Harvey, D.; Howe, A.G.; Kaennel-Dobbertin, M.; ... Tack, A.J.M., 2020: Can school children support ecological research? Lessons from the Oak Bodyguard citizen science project. Citizen Science: Theory and Practice, 5, 1: 10 (11 pp.). doi: 10.5334/cstp.267

Wermelinger, B., 2020: Ökologische Bedeutung von Borkenkäfern. Zürcher Wald, 27-29.

Wermelinger, B., 2020: Die wichtigsten Borkenkäferarten. Zürcher Wald, 30-33.

Wermelinger, B., 2020: Der Borkenkäfer - Altes, Neues, Wissenswertes. Zürcher Wald, 22-26.

Ettwein, A.; Korner, P.; Lanz, M.; Lachat, T.; Kokko, H.; Pasinelli, G., 2020: Habitat selection of an old-growth forest specialist in managed forests. Animal Conservation, doi: 10.1111/acv.12567

Leroy, B.M.L.; Gossner, M.M.; Lauer, F.P.M.; Petercord, R.; Seibold, S.; Jaworek, J.; Weisser, W.W., 2019: Assessing insecticide effects in forests: a tree-level approach using Unmanned Aerial Vehicles. Journal of Economic Entomology, 112, 6: 2686-2694. doi: 10.1093/jee/toz235

Schulze, E.D.; Schweingruber, F.; Gossner, M.M.; Günther, A.; Weber, U.; Stumpf, B.; Komor, E., 2019: Springtime bark-splitting of Acer pseudoplatanus in Germany. Forests, 10, 12: 1106 (10 pp.). doi: 10.3390/F10121106

Bois mort en forêt. Formation, importance et conservation

Deuxième édition révisée: Le bois mort fait partie du cycle forestier naturel. Même si son volume augmente depuis quelques décennies dans la forêt suisse, les objectifs en matière de conservation ne sont pas encore atteints.

Notice pour le praticien 52

2019

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Totholz im Wald. Entstehung, Bedeutung und Förderung

Zweite überarbeitete Auflage: Totholz gehört zum natürlichen Waldzyklus und ist die Lebensgrundlage für zahlreiche Arten. Gezielte Massnahmen sind nötig, um anspruchsvolle Arten, die auf viel Totholz in einer bestimmten Qualität angewiesen sind, zu fördern.

Merkblatt für die Praxis 52

2019

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Les fourmis des bois – biologie et répartition en Suisse

Les fourmis des bois jouent un rôle essentiel dans nos forêts. C’est la raison pour laquelle elles furent mises sous protection dès 1966 en Suisse. Étant donné que leurs populations semblent reculer, il importe non seulement de mieux connaître les prestations qu’elles fournissent à la forêt, mais aussi leurs exigences vis-à-vis de leur habitat.

Notice pour le praticien 63

2019

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20 from 317 publications

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