Dr. Holger Gärtner

Geochronology Summer School 2022	28.08. - 02.09.2022: Pontresina, Morteratsch (CH)
Wood Anatomy & Tree-Ring Ecology 2022	11. - 16.12.2022, Pontresina, Morteratsch (CH)

Courses 2022

International Course on Wood Anatomy & Tree-Ring Ecology 2022

Date: 11. - 16.12.2022

Location: Hotel Morteratsch (www.morteratsch.ch), Pontresina (CH)

FURTHER INFORMATION

Projects

Moringa

We aim on analyzing the exact formation of tree-rings (Xylogenesis) in Moringa peregrina (Forssk.) Fiori during a calendar year, building a long chronology for this species, and analyzing 13C and 18O to assess the tree-environment interactions, particularly precipitation.

Bulgarische Bergwälder

In large uncultivated forests in Bulgaria, the SLF is investigating the potential reaction of mountain woodland to climate change.

Publications WSL

Scientific publication article peer reviewed

Schneider, L.; Gärtner, H., 2022: Additive manufacturing for lab applications in environmental sciences: pushing the boundaries of rapid prototyping. Dendrochronologia, 76: 126015 (8 pp.). doi: 10.1016/j.dendro.2022.126015

Matulewski, P.; Buchwal, A.; Gärtner, H.; Jagodziński, A.M.; Čufar, K., 2022: Altered growth with blue rings: comparison of radial growth and wood anatomy between trampled and non-trampled Scots pine roots. Dendrochronologia, 72: 125922 (14 pp.). doi: 10.1016/j.dendro.2022.125922

Farahat, E.; Cherubini, P.; Saurer, M.; Gärtner, H., 2022: Wood anatomy and tree-ring stable isotopes indicate a recent decline in water-use efficiency in the desert tree Moringa peregrina. International Journal of Biometeorology, 66: 127-137. doi: 10.1007/s00484-021-02198-7

Gärtner, H.; Farahat, E., 2021: Cambial activity of Moringaperegrina (Forssk.) Fiori in arid environments. Frontiers in Plant Science, 12: 760002 (9 pp.). doi: 10.3389/fpls.2021.760002

Nikolova, P.S.; Geyer, J.; Brang, P.; Cherubini, P.; Zimmermann, S.; Gärtner, H., 2021: Changes in root-shoot allometric relations in alpine Norway spruce trees after strip cutting. Frontiers in Plant Science, 12: 703674 (14 pp.). doi: 10.3389/fpls.2021.703674

Tout afficher

Further scientific publications

Loader, N.J.; Sánchez-Salguero, R.; Gärtner, H., 2021: Together but apart: social and scientific exchange at the TRACE 2020 virtual conference. Dendrochronologia, 70: 125882 (2 pp.). doi: 10.1016/j.dendro.2021.125882

Battipaglia, G.; De Micco, V.; Gärtner, H., 2020: Most recent trends in tree-ring sciences: from local to global, from molecule to forest stands, from days to millennia. - Editorial to the special issue "TRACE 2019". Dendrochronologia, 63: 125758 (4 pp.). doi: 10.1016/j.dendro.2020.125758

Von Arx, G.; Cherubini, P.; Fonti, P.; Nievergelt, D.; Schneider, L.; Treydte, K.; Verstege, A.; Gärtner, H., 2020: In Memoriam. Fritz Hans Schweingruber. 1936-2020. Tree-Ring Research, 76, 2: 106-107. doi: 10.3959/TRR2020-8

Egli, M.; Gärtner, H.; Röösli, C.; Seibert, J.; Wiesenberg, G.; Wingate, V., 2020: Landschaftsdynamik im Gebiet des Grossen Mooses. Moorböden, Wassermanagement und landwirtschaftliche Nutzung im Spannungsfeld zwischen Produktivität und Nachhaltigkeit. Physische Geographie, 68. 91 p.

Graf, F.; Bast, A.; Gärtner, H.; Yildiz, A., 2019: Effects of mycorrhizal fungi on slope stabilisation functions of plants. In: Wu, W. (eds), 2019: Recent advances in geotechnical research. Cham, Springer. 57-77. doi: 10.1007/978-3-319-89671-7_6

Tout afficher

Magazine article and brochures

Bast, A.; Graf, F.; Gärtner, H., 2022: Das Arieschtobel: ein Freiluftlabor für den ingenieurbiologischen Hangverbau. Ingenieurbiologie: Mitteilungsblatt, 29-38.

Gärtner, H., 2014: Neue Entwicklungen zur Integration der Holzanatomie in die Jahrringforschung. Geographische Rundschau, 66, 7-8: 50-52.

Wirth, S.; Bucher, H.; Gärtner, H., 2012: Rottenstrukturen an der Waldgrenze. Baumwachstum in Extremlagen. Wald und Holz, 93, 7: 23-25.

Volkwein, A.; Gärtner, H., 2012: Dynamische Haltekraft von Wurzelstöcken. Bündnerwald, 65, 4: 81-86.

Gärtner, H.; Hitz, O.; Monbaron, M., 2003: Jahrringanalytische Rekonstruktion von Ufererosion und Schwemmholzaufkommen in Schweizer Wildbächen. FAN Agenda, Fachleute Naturgefahren Schweiz, 16-17.

Tout afficher

Other Publications

Gärtner H (2001) Holzanatomische Analyse diagnostischer Merkmale einer Freilegungsreaktion in Jahrringen von Koniferenwurzeln zur Rekonstruktion geomorphologischer Prozesse. Dissertation, Geographisches Institut der Universität Bonn, pp.122

Roer I, Hörsch B, Gärtner H, Dikau R (2001) Bioindication of rock glacier generations in the Turtmanntal (Valais, Switzerland). In: Ist European Permafrost Conference, Rome, 62.

Gärtner H, Bergmann A, Breunig M, Cremers AB, Dikau R (2000) OPALIS - An Open Paleoecological Information System. GIS - Zeitschrift für raumbezogene Information und Entscheidungen 13/2: 6-11.

Schmidt J, Gärtner H (2000) Investigations of geomorphometric siginificance in hydrologic processes using geo-information technologies - results and implications for GIS needs in geomorphology. Schriftenreihe des SFB 350, Vol. 83, Rheinische Friedrich-Wilhelms-Universität Bonn.

Schmidt J, Gärtner H, Dikau R (2000) Investigations in Slope Development through Landslide Activity - Concepts, Methods, and Implications for Interdisciplinary and Interoperable Data Management. Schriftenreihe des SFB 350, Vol. 84, Rheinische Friedrich-Wilhelms-Universität Bonn.

Gärtner H, Bergmann A (1999) Object-oriented modeling of data sources as a tool for the integration of heterogeneous paleoecological information. In: Proceedings of the 4th International Conference on Geocomputation, Mary Washington College, Fredericksburg, Virgina, July 25-28, 1999. Full paper:--- Proceedings GEOCOMPUTATION 99.

Bergmann A, Gärtner H, Breunig M, Cremers AB, Dikau R (1999): Integrierter Zugriff auf heterogene paläoökologische Datenbestände. In: Rautenstrauch,C. & M.Schenk (Hrsg.): Umweltinformatik 99. Umweltinformatik zwischen Theorie und Industrieanwendung. 13.Internationales Symposium Informatik für den Umweltschutz der Gesellschaft für Informatik (GI), Magdeburg 1999, Metropolis-Verlag, Marburg, 403-416.

Bergmann A, Gärtner H, Breunig M, Cremers AB, Dikau R (1998) Design and first steps in the development of OPALIS. In: The International Archives of Photogrammetry and Remote Sensing Vol. 32, Part 4, ISPRS Commision IV - GIS Between Visions and Applications, 2-58.

Dikau R, Gärtner H, Holl,B, Kienholz H, Mani P, Zimmermann M (1996) Untersuchungen zur Murgangaktivität im Mattertal, Wallis, Schweiz. In: INTERPRAEVENT 1996, Tagungspublikation Bd.1, 397-408.

Video-Publication

"Dendroecology"

Journal of Visualized Experiments (JoVE) 97, 2015

(see also the PDF of the manuscript)

A Technical Perspective in Modern Tree-ring Research - How to Overcome Dendroecological and Wood Anatomical Challenges

Gärtner H, Cherubini P, Fonti P, von Arx G, Schneider L, Nievergelt D, Verstege A, Bast A, Schweingruber FH, Büntgen U (2015): Technical challenges in tree-ring research including wood anatomy and dendroecology. Journal of Visualized Experiments (97), e52337, doi:10.3791/52337 (PDF)

Dendro-Links

Tree-Ring Associations:

	Association for Tree-Ring Research (ATR)
	Tree-Ring Society (TRS)
	Asian Dendrochronological Association (ADA)

Databases:

	The Xylem Database
	The DendroPic Database
	Inside Wood
	The International Tree-Ring Data Bank (ITRDB)

Others:

	Bibliography of Dendrochronology
	Glossary of Dendrochronology
	The Ultimate Tree-Ring Web Pages

Book Download (free)

Gärtner H, Schweingruber FH (2013): Microscopic Preparation Techniques for Plant Stem Analysis. Verlag Dr. Kessel, Remagen. 78 p.

Microtomes

One of the central topics in the further development of an ecologically based wood anatomy is the continuous improvement of preparation techniques.

In this regard, the development of new microtomes is crucial for preparing bigger specimen and to enable time series analysis in wood anatomy.

Until recently, the following microtomes have been developed at the wood anatomy lab of the WSL:

Core-Microtome:
	This microtome is designed to cut plain surfaces on increment cores. Detailed information can be found at: Gärtner H, Nievergelt D (2010): The core-microtome. A new tool for surface preparation on cores and time series analysis of varying cell parameters. Dendrochronologia 28/2: 85-92.
Lab-Microtome:
	The Lab-microtome is designed to cut micro sections of all kind of wooden specimen. The knife holder is placed on a double guided sledge for a precise guidance of the knife. The knife holder as well as the sample holder are adjustable in all directions (vertical + horizontal). The knife holder is designed for disposable blades (NT cutter blades, A-type). Semi-automated uplift of the sample for constant thickness of the samples during the cutting procedure.