Tree carbon relations

Tree Ecophysiology

Almost 90% of the global biomass is stored in trees. Knowing the reactions of trees and forests to the ongoing increase in atmospheric COconcentrations and other global climate changes is thus of major importance to predict the future of the earth's biosphere and its feedback with the atmosphere. Together with my research group, I investigate carbon relations of trees with special emphasis on the effects of environmental stress.

A core research topic is the clarification of the physiological controls for the storage of carbon reserves (e.g. starch or storage lipids). While there is detailed knowledge about the regulation of carbon storage and re-mobilization at the level of individual leaves, these mechanisms are still largely unknown for sapwood, which resembles the largest carbon storage pool in trees. By combining experimental studies with field observations, we aim to identify how carbon reserves storage is controlled at the whole tree level, how climatic and biotic stress influences carbon storage, and how tissue concentrations of carbon storage compounds can be used as a proxy for the net tree carbon balance. In addition, we experimentally test the functional significance of a tree's carbon storage pool for its resilience under climatic stress, like drought and cold temperatures.

 

Recent Publications

  • Effect of Asynchronous Light and Temperature Fluctuations on Plant Traits in Indoor Growth Facilities
    Chiang, Camilo; Bankestad, Daniel; Hoch, Gunter
    Agronomy-basel  10.3390/agronomy11040755 Published: APR 2021
  • A bottom-up quantification of foliar mercury uptake fluxes across Europe
    Wohlgemuth, Lena; Osterwalder, Stefan; Joseph, Carl; Kahmen, Ansgar; Hoch, Gunter; et al.
    Biogeosciences, 10.5194/bg-17-6441-2020  DEC 21 2020
  • Reaching Natural Growth: The Significance of Light and Temperature Fluctuations in Plant Performance in Indoor Growth Facilities
    Chiang, Camilo; Bankestad, Daniel; Hoch, Gunter
    Plants-Basel   DOI: 10.3390/plants9101312  OCT 2020
  • Reaching Natural Growth: Light Quality Effects on Plant Performance in Indoor Growth Facilities
    Chiang, Camilo; Bankestad, Daniel; Hoch, Gunter
    Plants-Basel  DOI: 10.3390/plants9101273  OCT 2020
  • Rhizosphere activity in an old-growth forest reacts rapidly to changes in soil moisture and shapes whole-tree carbon allocation
    Joseph, Jobin; Gao, Decai; Backes, Bernhard; Bloch, Corinne; Brunner, Ivano; et al.
    Proceedings Of The National Academy Of Sciences Of The United States Of America  DOI: 10.1073/pnas.2014084117  OCT 2020
  • A first assessment of the impact of the extreme 2018 summer drought on Central European forests
    Schuldt B; Buras A; Arend M; Vitasse Y; Beierkuhnlein, C; Damm, A; Gharun, M; Grams, TEE; Hauck, M; Hajek, P; Hartmann, H; Hiltbrunner, E; Hoch, G; Holloway-Phillips, M; Koerner, C; Larysch, E; Lubbe, T; Nelson, DB; Rammig, A; Rigling, A; Rose, L; Ruehr, NK; Schumann, K; Weiser, F; Werner, C; Wohlgemuth, T; Zang, CS; Kahmen, A
    Basic And Applied Ecology 2020, 10.1016/j.baae.2020.04.003
  • Soil nutrients and lowered source:sink ratio mitigate effects of mild but not of extreme drought in trees
    Schoenbeck, Leonie; Gessler, Arthur; Schaub, Marcus; Rigling, Andreas; Hoch, Guenter; Kahmen A, Li MH
    Environmental And Experimental Botany,  DOI: 10.1016/j.envexpbot.2019.103905  JAN 2020
  • Plant respiration: Controlled by photosynthesis or biomass?
    Collalti, Alessio; Tjoelker, Mark G.; Hoch, Guenter; Makela, Annikki; Guidolotti, Gabriele; et al.
    Global Change Biology 2020 DOI: 10.1111/gcb.14857 
  • High carbon storage in carbon-limited trees
    Weber, R; Gessler, A; Hoch, G
    NEW PHYTOLOGIST, 222 (1):171-182; 10.1111/nph.15599 APR 2019
  • No role for xylem embolism or carbohydrate shortage in temperate trees during the severe 2015 drought
    Dietrich, L; Delzon, S; Hoch, G; Kahmen, A
    JOURNAL OF ECOLOGY, 107 (1):334-349; 10.1111/1365-2745.13051 JAN 2019
  • Standardized protocols and procedures can precisely and accurately quantify non-structural carbohydrates
    Landhausser, SM; Chow, PS; Dickman, LT; Furze, ME; Kuhlman, I; Schmid, S; Wiesenbauer, J; Wild, B; Gleixner, G; Hartmann, H; Hoch, G; McDowell, NG; Richardson, AD; Richter, A; Adams, HD
    TREE PHYSIOLOGY, 38 (12):1764-1778; 10.1093/treephys/tpy118 DEC 2018
  • Losing half the conductive area hardly impacts the water status of mature trees
    Dietrich, L; Hoch, G; Kahmen, A; Korner, C
    SCIENTIFIC REPORTS, 8 10.1038/s41598-018-33465-0 OCT 9 2018
Günter Hoch

PD Dr. Günter Hoch
University of Basel
Dept of Environmental Sciences – Botany
4056 Basel

Tel: +41 (0)61 207 35 14

Research topics

  • Carbon storage of trees exposed to carbon limitation
  • Identifying the functions of different carbon storage compounds
  • Drought effects on carbon- and water-relations of plants
  • Tree growth and carbon-storage at cold climates

 

Interdisciplinary

  • Upscaling from trees to ecosystem processes (biogeochemistry)
  • Tree water-carbon relations (biophysics)
  • Applications for forest management (forestry)