Max Planck Gesellschaft

Department Biogeochemical Processes

at the Max Planck Institute for Biogeochemistry

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Henrik Hartmann, Dr. (habil.)

MPI for Biogeochemistry
Department of Biogeochemical Processes

Group leader PLANT ALLOCATION

Room: B2.007
Phone: +49 3641 576294
Mobile: +49 171 8188273
Fax: +49 3641 577200

 
Email: hhart(at)bgc-jena.mpg.de
Street address: Hans Knöll Str. 10, 07745 Jena, Germany
P.O. Box: 10 01 64, 07701, Jena, Germany

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Open positions

Apply until Oct 30: PhD position in ecophysiology Tree defense in a changing world, please send me an email.

Contents

Curriculum Vitae
Publications
Students and postdocs
->Direct Supervision
->International PhD students and trainees
Teaching
Distinctions
Presentations and posters
Other publications
Media



Professional positions

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Curriculum Vitae

Education and positions

HabilitationTechnical University of Munich (TUM )2017
  
Group leaderMax-Planck Institute for Biogeochemistrysince 2014
  
ScientistMax-Planck Institute for Biogeochemistry2010 - 2013
  
PostdocMax-Planck Institute for Biogeochemistry2009 - 2010
  
Ph.D. BiologyUniversité du Québec à Montréal2005 - 2008
  
M.Sc. Biology
(switch to Ph.D.)		Université du Québec à Montréal2003 - 2004
  
B. Forest SciencesUniversité de Moncton, Nouveau Brunswick2003


About myself
I was born and raised in Germany. After serving 2 years in the infantry and spending a couple of years in Berlin just after the wall came down I immigrated to Canada in 1992. After several years of a self-chosen 'exile' in the Canadian wilderness - living in a wooden camp without electricity or running water - I decided that modern life wasn’t too bad after all.

Because I lived in a rural community entirely depending on forests and forest products I quickly became interested in forest management. After completing a forestry technician training program and a bachelor's degree in forest science, I recognized that viewing forests from a management perspective was not enough for me. I had to understand them as ecosystems. Hence I decided to pursue my education and started a M.Sc in Biology at UQAM (Université du Québec à Montréal) in Montreal (Canada) and switched one year later directly to a Ph.D., also at UQAM.

About my research
[Ph.D.]
During my postgraduate studies, I investigated growth and physiological responses of residual sugar maple trees to disturbances from partial (selection) harvest and insect defoliation. My studies showed that natural disturbances (insect defoliation) played a much more important role in sugar maple mortality than harvest disturbance. Even more interestingly, the study showed that although all trees had been defoliated during past epidemic events some trees had been much more negatively affected by defoliation than others maybe because of carbon limitation.

[Current research]
I am investigating ecophysiological responses of trees to drought stress. Because one of the hypothesized mechanisms involved in drought-induced mortality is carbon starvation, the focus of my studies was on the carbon budget of trees.

Since a couple of years, I have been increasingly interested in plant allocation with a focus on carbon and nitrogen. We have been investigating interactions between plants and symbionts and how these interactions are influenced by resource availability. To do so, we grow plants under varying degrees of atmospheric [CO2] and assess how patterns of allocation to divers sinks (e.g., structural growth, defense compounds, VOCs, C storage) are altered by C availability. Further research involves investigations on C storage regulation and changes in C catabolism during drought and shading.

[The future of global forests]
Globally, forests provide life-sustaining services: storing carbon, hosting biodiversity, and regulating climate. These services are threatened by rapidly changing environmental conditions. Recent observations document widespread tree mortality in all forested biomes, but the lack of reliable global assessments of forest condition currently precludes conclusions about a real threat.

In 2014 I organized an international interdisciplinary workshop on tree mortality (see Hartmann et al. 2015, New Phytol). The main conclusion of the workshop was more information on forest condition is needed – at the global scale. I am running an international initiative that seeks to promote interdisciplinarity as a key to scientific progress. A follow-up workshop of the 2014 initiative was held in June 2017 and aimed to initiate concrete networking activities for assessing global forest conditions at spatial scales relevant to tree mortality. Please see HERE for more information.


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Publications

Scientific journals
[In preparation]

  • Roman M. Link, Henrik Hartmann, Dagoberto Arias Aguilar, Juan Carlos Valverde Otarola, Marvin Castillo Ugalde, Bernhard Schuldt. Do wood anatomical traits predict the productivity of Costa Rican tropical forest trees?
  • Benjamin D. Hesse, Henrik Hartmann, Thomas Rötzer, Simon M. Landhäusser, Michael Goisser, Fabian Weikl, Karin Pritsch and Thorsten E. E. Grams. Significant reductions in mature tree’s NSC pools upon two severe summer droughts, while NSC concentrations and C investment in reproduction remains unaffected.


[submitted]

  • Chongyang Xu, Hongyan Liu, Philippe Ciais, Henrik Hartmann, Jesús Julio Camarero, Xiuchen Wu, Fahu Chen. Enhanced drought exposure increasingly threatens global forests. Submitted to Nature Ecology and Evolution.
  • Zhao, J., Malone, S.L., Staudhammer, C.L., Starr, G., Hartmann, H. and Oberbauer, S.F. Freshwater wetland plants respond nonlinearly to inundation over a sustained period. Submitted to Environmental Experimental Botany.
  • Jianbei Huang, Almuth Hammerbacher, Jonathan Gershenzon, Michael Reichelt, Nicole M. van Dam, Anna Sala, Nate G. McDowell, Somak Chowdhury, Gerd Gleixner, Susan Trumbore and Henrik Hartmann Evidence from spruce clones shows that carbon reserves in trees are not merely a metabolic left-over but a priority sink. Submitted to PNAS.
  • William Hammond, A Williams, John Abatzoglou, Henry Adams, Tamir Klein, Rosana López Rodríguez, Cuauhtémoc Sáenz-Romero, Henrik Hartmann, David Breshears, Craig Allen. A hotter-drought fingerprint on Earth’s forest mortality sites–warming accelerates risks. Submitted to Nature Climate Chanage.
  • Lin Song, Wentao Luo, Robert J. Griffin-Nolan, Wang Ma, Jiangping Cai, Xiaoan Zuo, Qiang Yu, Henrik Hartmann, Mai-He Li, Melinda D. Smith, Scott L. Collins, Alan K. Knapp, Zhengwen Wang, Xingguo Han. Positive effects of drought on grassland community nonstructural carbohydrates are maximized at intermediate aridity. Submitted to New Phytologist.
  • Marie Spohn, Felipe Aburto, Nina Farwig, Patrick J. Frings, Henrik Hartmann, Thomas Hoffmann, Annegret Larsen, Yvonne Oelmann. Ecosystems buffer external inputs through storage and recycling. Submitted to Biogeochemistry.

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[accepted - revisions pending]

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[in press]

  • Juliane Helm, Henrik Hartmann, Martin Göbel, Boaz Hilman, David Herrera, Jan Muhr. Improvement of stem respiration measurements using oxygen sensors. Submitted to Tree Physiology.
  • Henrik Hartmann Dem Forst eine Chance! Submitted to AFZ Der Wald.
  • Christian Wirth, Rolf A. Engelmann, Nora Haack, Henrik Hartmann, Ronny Richter, Florian Schnabel, Mathias Scholz, Carolin Seele-Dilbat. Naturschutz und Klimawandel im Leipziger Auwald. Submitted to Biologie in unserer Zeit.

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Top of page [Published]

1Herrera-Ramirez, D., Sierra, C., Römermann, C., Muhr, J., Trumbore, S. E., Silvério, D., Brando, P. M., Hartmann, H. (in press). Starch and lipid storage strategies in tropical trees relate to growth and mortality. New Phytologist. doi:10.1111/nph.17239.
2Hao, B., Hartmann, H., Li, Y., Liu, H., Shi, F., Li, X., Li, Z., Wang, P., Allen, C. D., Wu, X. (2021). Precipitation gradient drives divergent relationship between non-structural carbohydrates and water availability in Pinus tabulaeformis of Northern China. Forests, 12(2): 133. doi:10.3390/f12020133.
3Forzieri, G., Girardello, M., Ceccherini, G., Spinoni, J., Feyen, L., Hartmann, H., Beck, P. S. A., Camps-Valls, G., Chirici, G., Mauri, A., Cescatti, A. (2021). Emergent vulnerability to climate-driven disturbances in European forests. Nature Communications, 12: 1081. doi:10.1038/s41467-021-21399-7.
4Schuldt, B., Buras, A., Arend, M., Vitasse, Y., Beierkuhnlein, C., Dammf, A., Gharun, M., Grams, T. E., Hauck, M., Hajek, P., Hartmann, H., Hiltbrunner, E., Hoch, G., Holloway-Phillips, M., Körner, C., Larysch, E., Lübbe, T., Nelson, D. B., Rammig, A., Rigling, A., Rose, L., Ruehr, N. K., Schumann, K., Weiser, F., Werner, C., Wohlgemuth, T., Zang, C. S., Kahmen, A. (2020). A first assessment of the impact of the extreme 2018 summer drought on Central European forests. Basic and Applied Ecology, 45, 86-103. doi:10.1016/j.baae.2020.04.003.
5Dai, J., Liu, H., Wang, Y., Guo, Q., Hu, T., Quine, T., Green, S., Hartmann, H., Xu, C., Liu, X., Jiang, Z. (2020). Drought-modulated allometric patterns of trees in semi-arid forests. Communications Biology, 3(1): 405. doi:10.1038/s42003-020-01144-4.
6Becacici Macieira, B. P., Locosselli, G. M., Buckeridge, M. S., Hartmann, H., Faustini Cuzzuol, G. R. (2020). Stem and leaf functional traits allow successional classification in six pioneer and non-pioneer tree species in Tropical Moist Broadleaved Forests. Ecological Indicators, 113: 106254. doi:10.1016/j.ecolind.2020.106254.
7Hartmann, H., Bahn, M., Carbone, M., Richardson, A. D. (2020). Plant carbon allocation in a changing world – challenges and progress: introduction to a Virtual Issue on carbon allocation. New Phytologist, 227(4), 981-988. doi:10.1111/nph.16757.
8Huang, J., Rücker, A., Schmidt, A., Gleixner, G., Gershenzon, J., Trumbore, S. E., Hartmann, H. (2020). Production of constitutive and induced secondary metabolites is coordinated with growth and storage in Norway spruce saplings. Tree Physiology, 40(7): tpaa040, pp. 928-942. doi:10.1093/treephys/tpaa040.
9Rehschuh, R., Cecilia, A., Zuber, M., Faragó, T., Baumbach, T., Hartmann, H., Jansen, S., Mayr, S., Ruehr, N. (2020). Drought-induced xylem embolism limits the recovery of leaf gas exchange in Scots pine. Plant Physiology, 184(2), 852-864. doi:10.1104/pp.20.00407.
10Herrera-Ramirez, D., Muhr, J., Hartmann, H., Roemermann, C., Trumbore, S. E., Sierra, C. (2020). Probability distributions of nonstructural carbon ages and transit times provide insights into carbon allocation dynamics of mature trees. New Phytologist, 26(5), 1299-1311. doi:10.1111/nph.16461.
11Schulze, E. D., Hartmann, H., Lambert, S., Weber, U. (2020). Folgen von Spätfrösten bei der Buche in montanen Lagen. AFZ, der Wald, 18, 46-48.
12Joseph, J., Gao, D., Backes, B., Bloch, C., Brunner, I., Gleixner, G., Haeni, M., Hartmann, H., Hoch, G., Hug, C., Kahmen, A., Lehmann, M. M., Li, M.-H., Luster, J., Peter, M., Poll, C., Rigling, A., Rissanen, K. A., Ruehr, N. K., Saurer, M., Schaub, M., Schönbeck, L., Stern, B., Thomas, F. M., Werner, R. A., Werner, W., Wohlgemuth, T., Hagedorn, F., Gessler, A. (2020). Rhizosphere activity in an old-growth forest reacts rapidly to changes in soil moisture and shapes whole-tree carbon allocation. Proc.Natl.Acad.Sci.USA, 117(40), 24885-24892. doi:10.1073/pnas.2014084117.
13Marchand, W., Girardin, M. P., Hartmann, H., Depardieu, C., Isabel, N., Gauthier, S., Boucher, É., Bergeron, Y. (2020). Strong overestimation of water-use efficiency responses to rising CO2 in tree-ring studies. Global Change Biology, 26(8), 4538-4558. doi:10.1111/gcb.15166.
14Rewald, B., Ammer, C., Hartmann, H., Malyshev, A. V., Meier, I. C. (2020). Editorial: Woody plants and forest ecosystems in a complex world—Ecological interactions and physiological functioning above and below ground. Frontiers in Plant Science, 11: 173. doi:10.3389/fpls.2020.00173.
15Marchand, W., Girardin, M. P., Hartmann, H., Gauthier, S., Bergeron, Y. (2019). Taxonomy, together with ontogeny and growing conditions, drives needleleaf species’ sensitivity to climate in boreal North America. Global Change Biology, 25(8), 2793-2809. doi:10.1111/gcb.14665.
16Huang, J., Kautz, M., Trowbridge, A. M., Hammerbacher, A., Raffa, K. F., Adams, H. D., Goodsman, D. W., Xu, C., Meddens, A. J. H., Kandasamy, D., Gershenzon, J., Seidl, R., Hartmann, H. (2019). Tree defence and bark beetles in a drying world: carbon partitioning, functioning and modelling. New Phytologist, 225(1), 26-36. doi:10.1111/nph.16173.
17Huang, J., Hammerbacher, A., Weinhold, A., Reichelt, M., Gleixner, G., Behrendt, T., van Dam, N. M., Sala, A., Gershenzon, J., Trumbore, S. E., Hartmann, H. (2019). Eyes on the future – evidence for trade-offs between growth, storage and defense in Norway spruce. New Phytologist, 222(1), 144-158. doi:10.1111/nph.15522.
18Brando, P. M., Paolucci, L., Ummenhofer, C. C., Ordway, E. M., Hartmann, H., Cattau, M. E., Rattis, L., Medjibe, V., Coe, M. T., Balch, J. (2019). Droughts, wildfires, and forest carbon cycling: A pantropical synthesis. Annual Review of Earth and Planetary Sciences, 47, 555-581. doi:10.1146/annurev-earth-082517-010235.
19Hesse, B. D., Goisser, M., Hartmann, H., Grams, T. E. E. (2019). Repeated summer drought delays sugar export from the leaf and impairs phloem transport in mature beech. Tree Physiology, 39(2), 192-200. doi:10.1093/treephys/tpy122.
20Huang, J., Forkelova, L., Unsicker, S. B., Forkel, M., Griffith, D. W. T., Trumbore, S. E., Hartmann, H. (2019). Isotope labeling reveals contribution of newly fixed carbon to carbon storage and monoterpenes production under water deficit and carbon limitation. Environmental and Experimental Botany, 162, 333-344. doi:10.1016/j.envexpbot.2019.03.010.
21Zhang, H.-Y., Hartmann, H., Gleixner, G., Thoma, M., Schwab, V. F. (2019). Carbon isotope fractionation including photosynthetic and post-photosynthetic processes in C3 plants: Low [CO2] matters. Geochimica et Cosmochimica Acta, 245, 1-15. doi:10.1016/j.gca.2018.09.035.
22Cailleret, M., Dakos, V., Jansen, S., Robert, E. M., Aakala, T., Amoroso, M. M., Antos, J. A., Bigler, C., Bugmann, H., Caccianiga, M., Camarero, J. J., Cherubini, P., Coyea, M. R., Cufar, K., Das, A. J., Davi, H., Gea-Izquierdo, G., Gillner, S., Haavik, L. J., Hartmann, H., Heres, A.-M., Hultine, K. R., Janda, P., Kane, J. M., Kharuk, V. I., Kitzberger, t., Klein, T., Levanic, T., Linares, J. C., Lombardi, F., Mäkinen, H., Mészáros, I., Metsaranta, J. M., Oberhuber, W., Papadopoulos, A., Petritan, A. M., Rohner, B., Sangüesa-Barreda, G., Smith, J. M., Stan, A., Stojanovic, D. B., Suarez, M. L., Svoboda, M., Trotsiuk, V., Villalba, R., Westwood, A., Wyckoff, P., Martínez-Vilalta, J. (2019). Early-warning signals of individual tree mortality based on annual radial growth. Frontiers in Plant Science, 9: 1964. doi:10.3389/fpls.2018.01964.
23Klein, T., Hartmann, H. (2018). Climate change drives tree mortality. Science, 362(6416), 758. doi:10.1126/science.aav6508.
24D’Orangeville, L., Maxwell, J., Kneeshaw, D., Pederson, N., Duchesne, L., Logan, T., Houle, D., Arseneault, D., Beier, C. M., Bishop, D. A., Druckenbrod, D., Fraver, S., Girard, F., Halman, J., Hansen, C., Hart, J. L., Hartmann, H., Kaye, M., Leblanc, D., Manzoni, S., Ouimet, R., Rayback, S., Rollinson, C. R., Phillips, R. P. (2018). Drought timing and local climate determine the sensitivity of eastern temperate forests to drought. Global Change Biology, 24(6), 2339-2351. doi:10.1111/gcb.14096.
25Marchand, W., Girardin, M. P., Gauthier, S., Hartmann, H., Bouriaud, O., Babst, F., Bergeron, Y. (2018). Untangling methodological and scale considerations in growth and productivity trend estimates of Canada's forests. Environmental Research Letters, 13: 093001. doi:10.1088/1748-9326/aad82a.
26Hartmann, H., Schuldt, B., Sanders, T. G. M., Macinnis-Ng, C., Boehmer, H. J., Allen, C. D., Bolte, A., Crowther, T. W., Hansen, M. C., Medlyn, B. E., Ruehr, N. K., Anderegg, W. R. L. (2018). Monitoring global tree mortality patterns and trends. Report from the VW symposium 'Crossing scales and disciplines to identify global trends of tree mortality as indicators of forest health'. New Phytologist, 217(3), 984-987. doi:10.1111/nph.14988.
27Weber, R., Schwendener, A., Schmid, S., Lambert, S., Wiley, E., Landhäusser, S. M., Hartmann, H., Hoch, G. (2018). Living on next to nothing: tree seedlings can survive weeks with very low carbohydrate concentrations. New Phytologist, 218(1), 107-118. doi:10.1111/nph.14987.
28Li, W., Hartmann, H., Adams, H. D., Zhang, H., Jin, C., Zhao, C., Guan, D., Wang, A., Yuan, F., Wu, J. (2018). The sweet side of global change–dynamic responses of non-structural carbohydrates to drought, elevated CO2 and nitrogen fertilization in tree species. Tree Physiology, 38(11), 1706-1723. doi:10.1093/treephys/tpy059.
29Landhäusser, S. M., Chow, P. S., Dickman, L. T., Furze, M. E., Kuhlmann, I., Schmid, S., Wiesenbauer, J., Wild, B., Gleixner, G., Hartmann, H., Hoch, G., McDowell, N. G., Richardson, A. D., Richter, A., Adams, H. D. (2018). Standardized protocols and procedures can precisely and accurately quantify non-structural carbohydrates. Tree Physiology, 38(12), 1764-1778. doi:10.1093/treephys/tpy118.
30Zhang, H.-Y., Lü, X.-T., Hartmann, H., Keller, A., Han, X.-G., Trumbore, S. E., Phillips, R. P. (2018). Foliar nutrient resorption differs between arbuscular mycorrhizal and ectomycorrhizal trees at local and global scales. Global Ecology and Biogeography, 27(7), 875-885. doi:10.1111/geb.12738.
31Huang, J., Hartmann, H., Hellén, H., Wisthaler, A., Perreca, E., Weinhold, A., Rücker, A., van Dam, N. M., Gershenzon, J., Trumbore, S. E., Behrendt, T. (2018). New perspectives on CO2, temperature and light effects on BVOC emissions using online measurements by PTR-MS and cavity ring-down spectroscopy. Environmental Science & Technology, 52(23), 13811-13823. doi:10.1021/acs.est.8b01435.
32Furze, M. E., Trumbore, S. E., Hartmann, H. (2018). Detours on the phloem sugar highway: stem carbon storage and remobilization. Current Opinion in Plant Biology, 43, 89-95. doi:10.1016/j.pbi.2018.02.005.
33McDowell, N., Allen, C. D., Anderson-Teixeira, K., Brando, P., Brienen, R., Chambers, J., Christoffersen, B., Davies, S., Doughty, C., Duque, A., Espirito-Santo, F., Fisher, R., Fontes, C. G., Galbraith, D., Goodsman, D., Grossiord, C., Hartmann, H., Holm, J., Johnson, D. J., Kassim, A. R., Keller, M., Koven, C., Kueppers, L., Kumagai, T., Malhi, Y., McMahon, S. M., Mencuccini, M., Meir, P., Moorcroft, P., Muller-Landau, H. C., Phillips, O. L., Powell, T., Sierra, C., Sperry, J., Warren, J., Xu, C., Xu, X. (2018). Drivers and mechanisms of tree mortality in moist tropical forests. New Phytologist, 219(3), 851-869. doi:10.1111/nph.15027.
34Hartmann, H., Adams, H. D., Hammond, W. M., Hoch, G., Landhäusser, S. M., Wiley, E., Zaehle, S. (2018). Identifying differences in carbohydrate dynamics of seedlings and mature trees to improve carbon allocation in models for trees and forests. Environmental and Experimental Botany, 152, 7-18. doi:10.1016/j.envexpbot.2018.03.011.
35Zhang, H.-Y., Lü, X.-T., Knapp, A. K., Hartmann, H., Bai, E., Wang, X.-B., Wang, Z.-W., Wang, X.-G., Yu, Q., Han, X.-G. (2018). Facilitation by leguminous shrubs increases along a precipitation gradient. Functional Ecology, 32(1), 203-213. doi:10.1111/1365-2435.12941.
36Hartmann, H., Moura, C., Anderegg, W. R. L., Ruehr, N. K., Salmon, Y., Allen, C. D., Arndt, S. K., Breshears, D. D., Davi, H., Galbraith, D., Ruthrof, K. X., Wunder, J., Adams, H. D., Bloemen, J., Cailleret, M., Cobb, R., Gessler, A., Grams, T. E. E., Jansen, S., Kautz, M., Lloret, F., O’Brien, M. (2018). Research frontiers for improving our understanding of drought-induced tree and forest mortality. New Phytologist, 218(1), 15-28. doi:10.1111/nph.15048.
37Cobb, R. C., Ruthrof, K., Breshears, D., Llorett, F., Aakala, T., Adams, H. D., Anderegg, W. L., Ewers, B. E., Galiano, L., Grünzweig, J. M., Hartmann, H., Huang, C., Klein, T., Kunert, N., Kitzberger, T., Landhäusser, S. M., Levick, S. R., Preisler, Y., Suarez, M. L., Trotsiuk, V., Zeppel, M. (2017). Ecosystem dynamics and management after forest die-off: a global synthesis with conceptual state-and-transition models. Ecosphere, 8(12): e02034. doi:10.1002/ecs2.2034.
38Cailleret, M., Jansen, S., Robert, E. M. R.., de Soto, L., Aakala, T., Antos, J. A., Beikircher, B., Bigler, C., Bugmann, H., Caccianiga, M., Cada, V., Camarero, J. J.., Cherubini, P., Cochard, H., Coyea, M. R.., Cufar, K., Das, A. J., Davi, H., Delzon, S., Dorman, M., Gea-Izquierdo, G., Gillner, S., Haavik, L. J.., Hartmann, H., Heres, A.-M., Hultine, K. R.., Janda, P., Kane, J. M., Kharuk, V. I.., Kitzberger, T., Klein, T., Kramer, K., Lens, F., Levanic, T., Linares Calderon, J. C., Lloret, F., Lobodo-Vale, R., Lombardi, F., Lopez Rodriguez, R., Mäkinen, H., Mayr, S., Meszaros, I., Metsaranta, J. M., Minunno, F., Oberhuber, W., Papadopoulos, A., Peltoniemi, M., Petritan, A. M., Rohner, B., Sangüesa-Barreda, G., Sarris, D., Smith, J. M., Stan, A. B., Sterck, F., Stojanovic, D. B.., Suarez, M. L.., Svoboda, M., Tognetti, R., Torres-Ruiz, J. M., Trotsiuk, V., Villalba, R., Vodde, F., Westwood, A. R.., Wyckoff, P. H., Zafirow, N., Martinez-Vilalta, J. (2017). A synthesis of radial growth patterns preceding tree mortality. Global Change Biology, 23(4), 1675-1690. doi:10.1111/gcb.13535.
39Huang, J., Hammerbacher, A., Forkelova, L., Hartmann, H. (2017). Release of resource constraints allows greater carbon allocation to secondary metabolites and storage in winter wheat. Plant, Cell and Environment, 40(5), 672-685. doi:10.1111/pce.12885.
40Huang, J., Reichelt, M., Chowdhury, S., Hammerbacher, A., Hartmann, H. (2017). Increasing carbon availability stimulates growth and secondary metabolites via modulation of phytohormones in winter wheat. Journal of Experimental Botany, 68(5), 1251-1263. doi:10.1093/jxb/erx008.
41Türke, M., Feldmann, R., Fürst, B., Hartmann, H., Herrmann, M., Klotz, S., Mathias, G., Meldau, S., Ottenbreit, M., Reth, S., Schädler, M., Trogisch, S., Buscot, F., Eisenhauer, N. (2017). Multitrophische Biodiversitätsmanipulation unter kontrollierten Umweltbedingungen im iDiv Ecotron. In L. Arbeitsgruppe Lysimeter (Ed.), 17. Lysimetertagung, 09.-10.Mai 2017 an der HBLFA Raumbach-Gumpenstein (pp. 107-114).
42Adams, H. D., Zeppel, M. J. B., Anderegg, W. R. L., Hartmann, H., Landhäusser, S. M., Tissue, D. T., Huxman, T. E., Hudson, P. J., Franz, T. E., Allen, C. D., Anderegg, L. D. L., Barron-Gafford, G. A., Beerling, D. J., Breshears, D. D., Brodribb, T. J., Bugmann, H., Cobb, R. C., Collins, A. D., Dickman, L. T., Duan, H., Ewers, B. E., Galiano, L., Galvez, D. A., Garcia-Forner, N., Gaylord, M. L., Germino, M. J., Gessler, A., Hacke, U. G., Hakamada, R., Hector, A., Jenkins, M. W., Kane, J. M., Kolb, T. E., Law, D. J., Lewis, J. D., Limousin, J.-M., Love, D. M., Macalady, A. K., Martínez-Vilalta, J., Mencuccini, M., Mitchell, P. J., Muss, J. D., O’Brien, M. J., O’Grady, A. P., Pangle, R. E., Pinkard, E. A., Piper, F. I., Plaut, J. A., Pockman, W. T., Quirk, J., Reinhardt, K., Ripullone, F., Ryan, M. G., Sala, A., Sevanto, S., Sperry, J. S., Vargas, R., Vennetier, M., Way, D. A., Xu, C., Yepez, E. A., McDowell, N. G. (2017). A multi-species synthesis of physiological mechanisms in drought-induced tree mortality. Nature Ecology & Evolution, 1(9), 1285-1291. doi:10.1038/s41559-017-0248-x.
43Muhr, J., Messier, C., Delagrange, S., Trumbore, S. E., Xu, X., Hartmann, H. (2016). How fresh is maple syrup? Sugar maple trees mobilize carbon stored several years previously during early springtime sap-ascent. New Phytologist, 209(4), 1410-1416. doi:10.1111/nph.13782.
44Hartmann, H., Trumbore, S. E. (2016). Understanding the roles of nonstructural carbohydrates in forest trees – from what we can measure to what we want to know. New Phytologist, 211(2), 386-403. doi:10.1111/nph.13955.
45Hartmann, H. (2015). Carbon starvation during drought-induced tree mortality – are we chasing a myth? Journal of Plant Hydraulics, 2: e-005. doi:10.20870/jph.2015.e005.
46Hanf, S., Fischer, S., Hartmann, H., Keiner, R., Trumbore, S. E., Popp, J., Frosch, T. (2015). Online investigation of respiratory quotients in Pinus sylvestris and Picea abies during drought and shading by means of cavity-enhanced Raman multi-gas spectrometry. Analyst, 140(13), 4473-4481. doi:10.1039/c5an00402k.
47Quentin, A. G., Pinkard, E. A., Ryan, M. G., Tissue, D. T., Baggett, L. S., Adams, H. D., Maillard, P., Marchand, J., Landhäusser, S. M., Lacointe, A., Gibon, Y., Anderegg, W. R., Asao, S., Atkin, O. K., Bonhomme, M., Claye, C., Chow, P. S., Clément-Vidal, A., Davies, N. W., Dickman, L. T., Dumbur, R., Ellsworth, D. S., Falk, K., Galiano, L., Grünzweig, J. M., Hartmann, H., Hoch, G., Hood, S., Jones, J. E., Koike, T., Kuhlmann, I., Lloret, F., Maestro, M., Mansfield, S. D., Martínez-Vilalta, J., Maucourt, M., McDowell, N. G., Moing, A., Muller, B., Nebauer, S. G., Niinemets, Ü., Palacio, S., Piper, F., Raveh, E., Richter, A., Rolland, G., Rosas, T., Joanis, B. S., Sala, A., Smith, R. A., Sterck, F., Stinziano, J. R., Tobias, M., Unda, F., Watanabe, M., Way, D. A., Weerasinghe, L. K., Wild, B., Wiley, E., Woodruff, D. R. (2015). Non-structural carbohydrates in woody plants compared among laboratories. Tree Physiology, 35(11), 1146-1165. doi:10.1093/treephys/tpv073.
48Pereyra, G., Hartmann, H., Michalzik, B., Ziegler, W., Trumbore, S. E. (2015). Influence of Rhizobia inoculation on biomass gain and tissue nitrogen content of Leucaena leucocephala seedlings under drought. Forests, 6, 3686-3703. doi:10.3390/f6103686.
49Hartmann, H., McDowell, N. G., Trumbore, S. E. (2015). Allocation to carbon storage pools in Norway spruce saplings under drought and low CO2. Tree Physiology, 35(3), 243-252. doi:10.1093/treephys/tpv019.
50Zhang, H., Ziegler, W., Han, X., Trumbore, S. E., Hartmann, H. (2015). Plant carbon limitation does not reduce nitrogen transfer from arbuscular mycorrhizal fungi to Plantago lanceolata. Plant and Soil, 396(1-2), 369-380. doi:10.1007/s11104-015-2599-x.
51Hartmann, H., Adams, H. D., Anderegg, W. R. L., Jansen, S., Zeppel, M. J. B. (2015). Research frontiers in drought-induced tree mortality: crossing scales and disciplines. New Phytologist, 205(3), 965-969. doi:10.1111/nph.13246.
52Fischer, S., Hanf, S., Frosch, T., Gleixner, G., Popp, J., Trumbore, S. E., Hartmann, H. (2015). Pinus sylvestris switches respiration substrates under shading but not during drought. New Phytologist, 207(3), 542-550. doi:10.1111/nph.13452.
53Trumbore, S. E., Brando, P., Hartmann, H. (2015). Forest health and global change. Science, 349(6250), 814-818. doi:10.1126/science.aac6759.
54Ma, Z., Hartmann, H., Wang, H., Li, Q., Wang, Y., Li, S. (2014). Carbon dynamics and stability between native Masson pine and exotic slash pine plantations in subtropical China. European Journal of Forest Research, 133, 307-321. doi:10.1007/s10342-013-0763-5.
55Zhao, J., Hartmann, H., Trumbore, S. E., Ziegler, W., Zhang, Y. (2013). High temperature causes negative whole-plant carbon balance under mild drought. New Phytologist, 200(2), 330-339. doi:10.1111/nph.12400.
56Hartmann, H., Ziegler, W., Kolle, O., Trumbore, S. E. (2013). Thirst beats hunger – declining hydration during drought prevents carbon starvation in Norway spruce saplings. New Phytologist, 200(2), 340-349. doi:10.1111/nph.12331.
57Hartmann, H., Ziegler, W., Trumbore, S. E. (2013). Lethal drought leads to reduction in nonstructural carbohydrates in Norway spruce tree roots but not in the canopy. Functional Ecology, 27(2), 413-427. doi:10.1111/1365-2435.12046.
58Mackay, S. L., Arain, M. A., Khomik, M., Brodeur, J. J., Schumacher, J., Hartmann, H., Peichl, M. (2012). The impact of induced drought on transpiration and growth in a temperate pine plantation forest. Hydrological Processes, 26(12), 1779-1791. doi:10.1002/hyp.9315.
59Hartmann, H. (2011). Will a 385 million year-struggle for light become a struggle for water and for carbon? - How trees may cope with more frequent climate change-type drought events. Global Change Biology, 17(1), 642-655. doi:10.1111/j.1365-2486.2010.02248.x.
60Hartmann, H., Messier, C. (2011). Interannual variation in competitive interactions from natural and anthropogenic disturbances in a temperate forest tree species: Implications for ecological interpretation. Forest Ecology and Management, 261(11), 1936-1944. doi:10.1016/j.foreco.2011.02.018.
61Hartmann, H., Daoust, G., Bigue, B., Messier, C. (2010). Negative or positive effects of plantation and intensive forestry on biodiversity: A matter of scale and perspective. Forestry Chronicle, 86(3), 354-364.
62Hartmann, H., Beaudet, M., Mazerolle, M. J., Messier, C. (2009). Sugar maple (Acer saccharum Marsh.) growth is influenced by close conspecifics and skid trail proximity following selection harvest. Forest Ecology and Management, 258(5), 823-831. doi:10.1016/j.foreco.2009.05.028.
63Hartmann, H., Messier, C. (2008). The role of forest tent caterpillar defoliations and partial harvest in the decline and death of sugar maple. Annals of Botany, 102(3), 377-387. doi:10.1093/aob/mcn104.
64Hartmann, H., Beaudet, M., Messier, C. (2008). Using longitudinal survival probabilities to test field vigour estimates in sugar maple (Acer saccharum Marsh.). Forest Ecology and Management, 256(10), 1771-1779. doi:10.1016/j.foreco.2008.02.045.
65Hartmann, H., Messier, C., Beaudet, M. (2007). Improving tree mortality models by accounting for environmental influences. Canadian Journal of Forest Research, 37(11), 2106-2114. doi:10.1139/X07-078.
66Nolet, P., Hartmann, H., Bouffard, D., Doyon, F. (2007). Predicted and observed sugar maple mortality in relation to site quality indicators. Northern Journal of Applied Forestry, 24(4), 258-264.

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Students and postdocs

Direct Supervision

[Postdocs]

  • Haiyang Zhang (2016-2017)

Influence of [CO2] and drought on carbon isotope ratios primary metabolites and biomarkers

  • Jianbei Huang (2018- )

Plant defenses in a changing world

[Ph.D.]

  • Juliane Helm (2018- )

Respiratory quotient and carbon transport in tree stems. Friedrich Schiller University Jena.

  • David Herrera (2017- )

Ecophysiological responses of Amazon forest trees to climate variability. Friedrich Schiller Universität Jena.

  • Remy Rehschuh (2017- )

Stress and recovery from heat and drought in Scots pine. Karlsruhe Institute of Technology.

  • William Marchand (2017- )

Impact on climate change on growth and ecophysiology of black spruce in Eastern Canada. University of Quebec in Montreal.

Carbon dynamics and control mechanisms in trees - an interdisciplinary approach. Friedrich Schiller Universität Jena.

Physiological trade-offs in Leucaena leucocephala under variable water supply. Friedrich Schiller Universität Jena.

Qualitative and quantitative changes of BVOC’s during drought and carbon starvation in Norway spruce and peppermint. Friedrich Schiller Universität Jena.

[Master]

  • Sarah Fischer (Jan 2014 - Aug 2014)

Changes in respiratory substrate during drought stress. Technische Unversität Berlin.

[Diploma]

  • Janine Schmidt (2011 - 2013)

NSC dynamics in leaf, branch and root tissue of young spruce trees (Picea abies [L.] H.Karst.) during drying-rewetting cycles and severe drought. Friedrich Schiller Universität Jena.

[Bachelor]

  • Maximilian Bröcher (2017)

Investigations on tree-ring width and carbon isotope ratios in trees along a water availability gradient. Friedrich Schiller Universität Jena.


Top of page International PhD students and trainees

[Chinese Academy of Science]

  • Ma Zeqing (2010 - 2011)

Leaf water potential of young spruce trees (Picea abies [L.] H.Karst.) in relation to increasing drought. CAS-MPS Doctoral Promotion Program. see his paper

  • Zhao Junbin (2011 - 2012)

Effects of elevated temperature on the carbon and water cycle of Eastern White Cedar (Thuja occidentalis L.) during drought. CAS-MPS Doctoral Promotion Program.

  • Zhang Haiyang (2012 - 2014)

Effects of carbon limitation on the exchange of carbon and nitrogen between plantago and mycorrhizae. CAS-MPS Doctoral Promotion Program.

[Seminarfacharbeiten]
* 2011: Grete Unrein Schule, Jena

  • 2013: Carl Zeiss Gymnasium, Jena

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Teaching

  • Rules of good scientific practices

IMPRS MPI for Biogeochemistry

  • Dendroökologie - dem Geheimniss der Bäume auf der Spur

Biologiedidaktik, Friedrich Schiller Universität Jena

  • Important processes in the terrestrial biosphere

IMPRS MPI for Biogeochemistry

  • Ökophysiologische Grundlagen der Waldökologie

Institut für Ökologie, Friedrich Schiller Universität Jena

  • Ökophysiologisches Feldpraktikum

Lehrstuhl für Pflanzenökophysiologie, Wissenschaftszentrum Weihenstephan, TUM

  • Hot topics in ecology

Lehrstuhl für Pflanzenökophysiologie, Wissenschaftszentrum Weihenstephan, TUM

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Distinctions

[Awards]

  • Gold medal of the Canadian Institute of Forestry (CIF), 2003
  • Award for academic excellence in Forest sciences, University of Moncton, NB, Canada, 2003

[Funding]

  • Deutsche Forschungsgemeinschaft, Tree defense in a changing world, 389000€, 2020-2023
  • VW Stiftung, Symposium, 85000€, 2017
  • Deutsche Forschungsgemeinschaft, Own position, 125000€, 2011-2014
  • Natural Sciences and Engineering Research Council of Canada, Postdoc, 60000€, 2009-2011
  • Fonds Nature et technologies Quebec, Postdoc, 45000€, Declined
  • Fonds Nature et technologies Quebec, PhD, 15000€, 2007-2008
  • Natural Sciences and Engineering Research Council of Canada, PhD, 47250€, 2005-2007
  • Natural Sciences and Engineering Research Council of Canada, MS, 26200€, 2003-2004
  • Fonds Nature et technologies Quebec, MS, 22500€, Declined
  • Diverse undergrad stipends, Canada, 35150€, 1999-2008

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Presentations and posters

Presentations

  • Hartmann, H..
  • Hartmann, H., et al. (2018) Sweet dreams are made of these - Standardized protocols and procedures can solve the carbohydrate quandary. GfOe meeting Vienna, AT.
  • Hartmann, H. [invited] (2018) From molecules to the globe – the role of carbon allocation in plant responses to environmental change. Institut National de Recherche Agronomique. Nancy. FR.
  • Hartmann, H. (2017) Global trends in tree mortality as indicator of forest health. Inaugural meeting of the Global Forest Biodiversity Initiative. Beijing, CN.
  • Hartmann, H. [invited] (2017) Seeing the forest for the trees - carbon dynamics in trees during stress. Guest lecture at the Institute of Geographical Sciences and Natural Resources Research of the Chinese Academy of Sciences, Normal University Beijing and Institute of Applied Ecology, Shenyang. CN.
  • Hartmann, H. [invited] (2017) Seeing the forest for the trees - carbon dynamics in trees during stress. Guest lecture, University of Basel, Basel, CH.
  • Hartmann, H. (2016) Les forêts sont-elles menacées par les changements climatiques? – Observations, état des connaissances, directions futures. Guest lecture, University Laval, Quebec, CA.
  • Hartmann, H. (2016) Non-structural carbohydrates in tree ecophysiological research – from what we can measure to what we want to know. GfOe annual meeting. Marburg, DE.
  • Hartmann, H. (2016) Carbon starvation during drought-induced tree mortality - are we chasing a myth? Guest lecture, University of Innsbruck, Innsbruck, AT.
  • Hartmann, H.,, Forkelova, L., Huang, J. (2016) Whole-plant C allocation priorities - do secondary metabolites and VOCs matter? Workshop on Chemical Ecology, Pretoria, SA.
  • Hartmann, H., Fischer, S., Zhang, H., Pereyra, G., Forkelova, L., Huang, J., Muhr, J., Messier, C., Délagrange, S. and Trumbore, S. (2015) Stable carbon isotope labeling - a versatile tool in research on plant allocation. European Ecological Foundation, Rome, IT.
  • Hartmann, H.[invited keynote] (2015) Carbon starvation during drought-induced tree mortality - are we chasing a myth?. International Xylem meeting. Bordeaux, FR.
  • Hartmann, H., Fischer, S., Hanf, S, Frosch, T., Gleixner, G., Popp, J., Trumbore, S. (2015) Pinus sylvestris switches respiration substrates under shading but not during drought. EGU meeting, Vienna.
  • Hartmann, H.(2014). Gaps, bridges and scales - ecophysiological research from processes to organisms and beyond. GfOe meeting, Hildesheim, Germany.
  • Hartmann, H.[invited](2014). Can we experimentally manipulate NSC pools in trees? IGNITE session, ESA meeting, Sacramento, USA.
  • Hartmann, H., McDowell, N., Trumbore, S. (2014). Where has all the carbon gone - carbon allocation pattern during drought and carbon starvation. ESA meeting, Sacramento, USA.
  • Hartmann, H., McDowell, N., Trumbore, S. (2014). Where has all the carbon gone - in search of the missing sink. EGU meeting, Vienna.
  • Hartmann, H.[keynote] (2013) Tree responses to environmental stress - 385 million years of evolution face rapid climate change. GfOe meeting, Potsdam, Germany.
  • Hartmann, H., Ziegler, W., Trumbore, S. (2013) Carbon dynamics during induced lethal drought and carbon starvation. Carbo Extreme final meeting, Seefeld, Austria.
  • Hartmann, H., Ziegler, W., Trumbore, S. (2012) Carbon dynamics during induced lethal drought and carbon starvation. AGU fall meeting, San Francisco, California.
  • Hartmann, H., Ziegler, W., Trumbore, S. (2012) Carbon dynamics during induced lethal drought and carbon starvation. ESA annual meeting, Portland, Oregon.
  • Hartmann, H.[invited] Wald im Klimawandel – Bedrohung von Waldökosystemen: ein weltweites Phänomen. Arnsberger Wald Forum. Arnsberg, NW, November 2011 und Waldbauernlehrgang Much, NW, März 2012.
  • Hartmann, H., Messier, C. and Beaudet, M. (2008) Role of natural and anthropogenic stresses in tree decline and death. ESA annual meeting, Milwaukee, USA, August 2008.
  • Hartmann, H., Messier, C. and Beaudet, M. (2007) Does the visual assessment of tree vigor in the selection system reflect actual tree survival probabilities? North American Forest Ecology Workshop, Vancouver, BC, Canada, June 2007.
  • Hartmann, H., Messier, C. and Beaudet, M. (2006) Truncating live growth series for mortality probability estimations. 7th International Conference on Dendrochronology, Beijing, China, Juin 2006 and Eastern CANUSA conference, Quebec, Canada, October 2006.
  • Hartmann, H., Messier, C. and Beaudet, M. (2005) Mortality of mature Sugar maple following selection harvest in the northern hardwoods of Quebec, Canada. ESA-Intelcol Joint Meeting, Montreal, Quebec, August 2005.
  • Hartmann, H., Messier, C. and Beaudet, M. (2005) Growth response of mature Sugar maple and yellow birch following selection harvest in the northern hardwoods of Québec, Canada. North American Forest Ecology Workshop, Aylmer, Quebec, Canada, June 2005.
  • Hartmann, H., Beaudet, M. , Kneeshaw, D., Béland, M., Messier, C., Kobe, R. (2003) Croissance et mortalité juvénile du bouleau jaune (Betula alleghaniensis Britton) en fonction de la disponibilité de lumière. Scientific competition (ACFAS-Acadie), winner in the undergraduate category Natural sciences and Engineering. March 2003.

Posters

  • Hartmann, H., Huang, J., Forkelova, L., Behrendt, T., Reichelt, M. & Hammerbacher, A. (2017) Do secondary metabolites and volatile organic compounds (VOC) matter in the whole-plant C balance? EGU annual meeting, Vienna, AT.
  • Hartmann, H., Fischer, S., Zhang, H., Pereyra, G., Forkelova, L., Huang, J., Trumbore, S. (2016) Stable carbon isotope labeling: a versatile tool in research on plant allocation. EGU meeting, Vienna, AT.
  • Hartmann, H., Trumbore, S. (2010) Will trees die from carbon starvation in a CO2 enriched world? 24th New Phytologist Symposium 'Plant respiration and climate change', Oxford, England.
  • Hartmann, H., Messier, C. and Beaudet, M. (2007) Does the visual assessment of tree vigor in the selection system reflect actual tree survival probabilities? Annual conference of the Centre of Forest Research, Montreal, Quebec, Canada, March 2007.


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Other publications

[Habilitation]

  • Hartmann, H. (2017) You can’t always get what you want – Patterns and control mechanisms of carbon allocation in plants under stress and resource limitation. Technische Universität München. Wissenschaftszentrum Weihenstephan. 166p.

[Dissertation]

  • Hartmann, H. (2008) Identifying stress factors in sugar maple decline and mortality following partial harvest: analyzing tree growth, vigour and water status. Université du Québec à Montreal. 156p. PDF

[Scientific reports]

  • Hartmann, H., Beaulieu, J., Daoust, G. (2002) La diversité biologique et la foresterie de plantations. Literature revue. Canadian Forest Service, Laurentian Forestry Centre. 119p. 372ref.
  • Hartmann, H., Daoust, G. (2002) Mesurage et évaluation, 31 ans après plantation, du test de provenance E277 d’épinette de Norvège établi à la Station forestière de Valcartier, Qc. Technical report. Canadian Forest Service, Laurentian Forestry Centre. 46p. 32ref.

[Peer reviews]

  • Canadian Journal of Forest Research
  • Czech Science Foundation
  • Ecology
  • Forest Ecology and Management
  • Forestry Chronicle
  • Frontiers in Functional Plant Ecology
  • Global Change Biology
  • Global Ecology and Biogeography
  • Journal of Applied Ecology
  • Journal of Experimental Botany
  • Journal of Ecology
  • Land
  • Methods in Ecology and Evolution
  • Nature Climate Change
  • New Phytologist
  • Oecologia
  • Swiss Science Foundation
  • Tellus B
  • Tree Physiology
  • ...


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Media

Citations in newspapers on issues like forest decline (selection)

Short radio interview about the current forest crisis (German only)

Radio show with questions from the audience (German only)

Sueddeutsche Zeitung (German only)

MDR (German only)

Donaukurier (German only)

Klimareporter (German only)

Boreale Wälder im Klimawandel (German only)

Watch a short power talk on the beauty of trees and why we should learn more about them (German only)

Listen to a radio interview on the motivation of becoming a forest scientist. (German only)

Here's a newpaper interview on my thoughts about forests (German only)

Please see here for a newspaper interview on forest health. (German only)

Here you find a blog entry on plant allocation (German only).

See a short report on Swiss television on the Pfynwald experiment on tree responses to drought (French only).

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