Henrik Hartmann, Dr. (habil.)
MPI for Biogeochemistry
Department of Biogeochemical Processes
Group leader PLANT ALLOCATION
Phone: +49 3641 576294
Fax: +49 3641 577200
Street address: Hans Knöll Str. 10, 07745 Jena, Germany
P.O. Box: 10 01 64, 07701, Jena, Germany
Education and positions
|Habilitation||Technical University of Munich (TUM )||2017|
|Group leader||Max-Planck Institute for Biogeochemistry||since 2014|
|Scientist||Max-Planck Institute for Biogeochemistry||2010 - 2013|
|Postdoc||Max-Planck Institute for Biogeochemistry||2009 - 2010|
|Ph.D.||Université du Québec à Montréal||2005 - 2008|
(switch to Ph.D.)
|Université du Québec à Montréal||2003 - 2004|
|B.F.Sc.||Université de Moncton, Nouveau Brunswick||2003|
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
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.
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 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 for more information.
- Forkelova, L, Hartmann, H., Unsicker, S., Gershenson, J. and Trumbore, S. (in prepration). Carbon storage use in peppermint under drought and carbon starvation.
- Landhausser, S.M., Chow, P., Hartmann, H., Adams, H., Gleixner, G., Wild, B., Hoch, G. Richter, A. Turin, D., Kuhlmann, I., Furze, M., Richardson, A., Schmid, S., Stockton, E.A., Wiesenbauer, J. Sweet dreams are made of these - – standard protocols for measurements of non-structural carbohydrates in plant tissues.
- Zhang, H., Hartmann, H., Gleixner, G., Thomaa, M. and Schwab-Lavric, V. Carbon isotope fractionation including photosynthetic and post-photosynthetic processes in C3 plants: low [CO2] matters.
- Li, W., Hartmann, H., Adams, H.D., Jin, C., Guan, D., Wang. A., Yuan, F. and Wu, F. The sweet side of global change - elevated CO2 increases non-structural carbohydrates in trees but not drought and N fertilization. Submitted to Tree Physiology.
- Hartmann, H., Adams, H.D., Hammond, W.H., Hoch, G., Landhäusser, S.M., Wiley, E. and Zähle, S. Bridging the gap between seedlings and ecosystems: the use of vegetation models for extrapolating carbohydrate dynamics in mature trees. Submitted to Environmental and Experimental Botany.
- Huang, J., Hartmann, H., Hellén, H., Wisthaler, A., Hammerbacher, A., Reichelt, M., Dam, N., Gershenzon, J., Trumbore, S. and Behrendt, T. Contrasting effects of rising CO2 on methanol and monoterpene emissions in Picea abies under carbon limitation. Submitted to Plant Cell Environment.
- Forkelová, L., Unsicker, S.B., Huang, J., Forkel, M., Griffith, D.T., Trumbore, S. and Hartmann, H. Carbon limitation reveals allocation priority to monoterpene defense compounds in peppermint. Submitted to Plant Cell Environment.
- Furze, M., Trumbore, S. and Hartmann, H. Detours on the phloem sugar highway: stem carbon storage and remobilization. Solicited review for Current Opinion in Plant Biology.
- Zhang, H., Lu, X., Hartmann, H., Keller, A., Han, X., Trumbore, S., Phillips, R. Foliar nutrient resorption differs between arbuscular mycorrhizal and ectomycorrhizal trees at local and global scales. Submitted to Global Ecology and Biogeography.
- Hartmann, H., Moura, C., Anderegg, W., Ruehr, N., Salmon, Y., Allen, C.D., Arndt, S., Breshears, D., Davi, H., Galbraith, D., Ruthrof, K., Wunder, J., Adams, H.D., Bloemen, J., Cailleret, M., Cobb, R., Gessler, A., Grams, T., Jansen, S., Lloret, F. and O'Brien, M. Research frontiers for improving our understanding of drought-induced tree and forest mortality. New Phytologist.
Top of page [Published]
Students and postdocs
- Haiyang Zhang (2016-2017)
Influence of [CO2] and drought on carbon isotope ratios primary metabolites and biomarkers
- 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.
- Sarah Fischer (Jan 2014 - Aug 2014)
Changes in respiratory substrate during drought stress. Technische Unversität Berlin.
- 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.
- 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. see his paper
- Zhang Haiyang (2012 - 2014)
Effects of carbon limitation on the exchange of carbon and nitrogen between plantago and mycorrhizae. CAS-MPS Doctoral Promotion Program.
* 2011: Grete Unrein Schule, Jena
- 2013: Carl Zeiss Gymnasium, Jena
- 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
- Gold medal of the Canadian Institute of Forestry (CIF), 2003
- Award for academic excellence in Forest sciences, University of Moncton, NB, Canada, 2003
- 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
Presentations and posters
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Canadian Journal of Forest Research
- Czech Science Foundation
- 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
- Methods in Ecology and Evolution
- Nature Climate Change
- New Phytologist
- Swiss Science Foundation
- Tellus B
- Tree Physiology
Please see here for a newspaper interview on forest health. (German only)
Here you find a blog entry on plant allocation (German only).
Media article in response to our Nature Ecology and Evolution article (German only).
Short reporton Swiss television on the Pfynwald experiment on tree responses to drought (French only).