• Duration: 01.07.2016 – 30.04.2020
  • : Climate change
  • Research status:  Closed

Alpine humus as a climate-sensitive C-storage and decisive location factor in mountain forests

The significance of organic surface layer humus for carbon storage and other important ecosystem functions of mountain forests has only been realized during recent years. The project will close important gaps of knowledge by pursuing the following goals:

  1. improved knowledge on the distribution oft thick surface humus in the landscape
  2. quantification of its contribution to the carbon storage of mountain forests
  3. improved understanding of the processes leading to the formation and to the loss of humus layers
  4. spatial and temporal scenarios of the distribution and changes of humus-bound C-stocks under climate change
  5. recommendations for stabilization and enhancement of surface humus through adapted land-use

Reaching these goals will make a significant contribution to the goals of the Waldklimafonds (Fund on Climate and Forests), especially to

  • adapting of mountain forests to climate change,
  • securing the potential for CO2-reduction and C-storage of mountain forests,
  • detecting effects of current climate change on C-storage in humus layers,
  • implementing humus conservation measures into silviculture.

The project goals are pursued at three relevant scales:

  • comparative analysis of humus chemistry and microbiology on selected soil profiles with different dynamics of C-stocks, allowing identification of decisive processes
  • comparative analysis of water and bioelement budgets of selected mountain forest ecosystems, allowing identification of temporal trends and threats
  • regionalization (spatial modelling) of surface humus thickness and related C-stocks as a function of releif, parent material, climate , vegetation and land-use history, allowing extrapolation at landscape scale and recommendations for silviculture In linking the three levels of inquiry, the decisive driving forces and processes leading to the formation of thick humus layers will be identified and mapped at the scale relevant for management and monitoring.

Publications

  • Prof. Dr. Jörg Ewald, Dr. Michelangelo Olleck

    Humus on the rocks (2019) forschungsfelder - BMEL-Magazin für Ernährung und Landwirtschaft (3), S. 20.

  • Dr. Michelangelo Olleck, Prof. Dr. Jörg Ewald

    Schwarz-weiße Schönheit „on the Rocks“: Die Bedeutung des Tangelhumus für die Bergwälder der Kalkalpen - Wie man dicke Humuspolster an ihrem Bewuchs erkennt und was getan werden kann um sie zu schützen (2020) Vortrag an der Bayerischen Botanischen Gesellschaft in München, März 2020 .

  • HSWT Newsmeldung, Prof. Dr. Jörg Ewald, Dr. Michelangelo Olleck

    Präsentation des kurz vor Abschluss stehenden Verbundforschungsprojekts "Alpenhumus" im TUM/HSWT-Kolloquium für Angewandte Ökologie und Planung (2019) Forschungs-News HSWT, 23.01.2020 .

  • Dr. Michelangelo Olleck, Dr. Birgit Reger, Prof. Dr. Jörg Ewald

    • Permissions:  Peer Reviewed

    Plant indicators for Folic Histosols in mountain forests of the Calcareous Alps (2019) Applied Vegetation Science 23 (2), S. 285-296. DOI: 10.1111/avsc.12470

    Questions: Although thick forest floors overlying unweathered bedrock are important resources for mountain forests' functioning, their actual distribution is poorly known and difficult to delimit in the field. We therefore asked: (a) What is the specific composition of vegetation growing on Folic Histosols; (b) can indicator plants be used to detect Folic Histosols in mountain forests; (c) what do functional traits of plant indicators tell about the ecological properties of Folic Histosols? Location: Northern Calcareous Alps, south Germany. Methods: Based on representative stratified sampling of joint vegetation plots and soil profile descriptions, we estimated the frequency and thickness of Folic Histosols, determined the proportion of compositional variation specifically attributable to forest floor thickness using ordination, applied Indicator Species Analysis and searched for typical traits and ecological requirements of indicator species. Results: The co-existence of acidophilic and calciphytic plants is typical for the tessellated occurrence and the successional origin of Folic Histosols. In the study region, the detection of Folic Histosols on pure limestone or dolomite by ground vegetation works very well. Particularly acidophilic plants are suitable indicators for thick forest floors. The indicator value of bryophytes and Ericaceae for Folic Histosols is likely related to the colonization of rotten wood. Folic Histosol indicator species are widely spread in the allocation to sociology group, which ranges from open landscapes to dark forests and reflects successional origin. Conclusions: In mountain forests on carbonate bedrock, thick humus layers often occur next to bare rock. This tessellated structure can also be detected in the ground vegetation, where acidophilic and calciphytic plants occur side by side. Thick Folic Histosols in late successional forests are dominated by acidophilic plants colonizing rotten wood. Thus, the detection of Folic Histosols by understorey species is an easy and cost-effective possibility and one key to protect these vulnerable forest sites.
  • Prof. Dr. Jörg Ewald, Prof. Dr. Dr. Axel Göttlein, Dr. Michael Kohlpaintner, Dr. Michelangelo Olleck, Prof. Dr. Jörg Prietzel

    Alpenhumus als klimasensitiver C-Speicher und entscheidender Standortfaktor im Bergwald (2017) Vortrag auf dem Waldklimafonds-Kongress in Berlin, März 2017 .

  • Dr. Michelangelo Olleck, Prof. Dr. Jörg Ewald

    Tangelhumus in den Bayerischen Alpen - Verbreitung & Detektion anhand der Bodenvegetation (2019) Vortrag in der Seminarreihe "Aspekte der Waldökosystemforschung" in Freising, Januar 2019 .

  • Dr. Michelangelo Olleck, Prof. Dr. Jörg Ewald

    Mehr als gedacht - Verbreitung und ökologische Bedeutung mächtiger Humusauflagen in den Kalkalpen (2017) Vortrag auf der ANL-Fachtagung „Naturschutz: Von der Forschung in die Praxis“ in Freising, November 2017 .

  • Prof. Dr. Jörg Prietzel, Dr. Michael Kohlpaintner, Dr. Michelangelo Olleck

    Skeletthumusböden als klimasensitiver C-Speicher und entscheidender Faktor für die Ökosystemfunktionen von Bergwäldern der Kalkalpen (2019) Vortrag im Weihenstephaner Kolloquium zur Angewandten Ökologie und Planung in Freising, Dezember 2019 .

  • Prof. Dr. Jörg Ewald, Dr. Birgit Reger, Dr. Michelangelo Olleck

    More than we ever thought - distribution and function of lithic histosols in the Calcareous Alps (2017) Vortrag auf dem 125th IUFRO Anniversary Congress in Freiburg i. Br. , September 2017 .

  • Dr. Michelangelo Olleck, Prof. Dr. Jörg Ewald

    Verbreitung von mächtigen Humusauflagen und deren Potential als C-Speicher in den Bayerischen Kalkalpen (2018) Vortrag auf der Forstwissenschaftlichen Tagung in Göttingen, September 2018 .

  • Dr. Michelangelo Olleck, Prof. Dr. Jörg Ewald

    Black beauty on the rocks – distribution, function and C-storage potential of Tangel humus in the Calcareous Alps (2019) Vortrag auf dem 10th IALE World Congress in Mailand, Juli 2019 .

  • Prof. Dr. Jörg Ewald, Dr. Michelangelo Olleck

    Vegetation-based detection of thick forest floors and their decline in the Calcareous Alps (2018) Vortrag auf dem 7th workshop ("Vegetation Databases and Detection of Environmental Change") of the German working group on vegetation databases in Jena, März 2018 .

  • Prof. Dr. Jörg Ewald, Dr. Michelangelo Olleck

    Alpenhumus als klimasensitiver C-Speicher und entscheidender Standortfaktor im Bergwald (2019) Posterpräsentation am 1. Netzwerktreffen und der feierlichen Eröffnung des BayWISS Verbundkollegs "Life Sciences und Grüne Technologien" in Freising, Novermber 2019 .

  • Dr. Michelangelo Olleck, Prof. Dr. Jörg Ewald

    Alpenhumus als klimasensitiver C-Speicher und entscheidender Standortfaktor im Bergwald (2019) Posterpräsentation auf dem Jahreskolloquium des Bayerischen Wissenschaftsforums in Regensburg, Juni 2019 .

  • Prof. Dr. Jörg Ewald, Dr. Michelangelo Olleck

    Alpenhumus-Projekt gestartet (2017) Beitrag im Newsletter des Zentrums Wald-Forst-Holz Weihenstephan, März 2017 .

Promotions

"Alpenhumus" - Verbreitung und Vorkommen in den bayerischen Alpen

Doctoral candidate
Dr. Michelangelo Olleck
michelangelo.olleck@hswt.de
Research focus
Climate change
Time period
01.03.2017 – 14.10.2022
Scientific supervisor HSWT (HSWT)
Prof. Dr. Jörg Ewald

Lead of collaborative projects

Previous
Next

Workpackage lead HSWT

External project participation

Partners

Adressierte SDGs (Sustainable Development Goals)