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Heat and drought: Stress and recovery responses of Aleppo pine seedlings

Birami, Benjamin; Ruehr, Nadine ORCID iD icon; Gattmann, Marielle; Bamberger, Ines; Gast, Andreas; Grote, Rüdiger ORCID iD icon; Arneth, Almut

Abstract (englisch):

Aleppo pine trees growing at the arid timberline (Yatir forest, Israel) are facing extreme seasonal drought combined with hot temperatures during summer and short heat wave periods in spring. These heat waves have large effects on the forest carbon and water exchange, and might likely increase in severity with predicted climate change scenarios.
To better understand the trees’ physiology during stress and subsequent ability to recover from heat and drought, we performed a greenhouse experiment on one-year-old Pinus halepensis. Soil moisture was kept close to the winter optimum in the control and heat treatment and close to summer values in the drought and heat-drought treatment. The trees of the heat treatment were exposed to two short heat waves (4-days each) with temperature maxima of 43°C, about 15°C above the control and drought trees.
Aboveground carbon exchange, transpiration and emissions of selected volatile organic compounds (VOC) were measured continuously using automated tree chambers (n=4 per treatment). To detect changes in biomass allocation and carbohydrate pools, additional trees were sampled before, during and at the end of the stress periods.
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Volltext §
DOI: 10.5445/IR/1000064315
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Vortrag
Publikationsjahr 2016
Sprache Englisch
Identifikator urn:nbn:de:swb:90-643152
KITopen-ID: 1000064315
HGF-Programm 12.02.02 (POF III, LK 01) Vegetation climate- and land use system
Veranstaltung 46th Annual Meeting ot the Ecological Society of Germany, Austria and Switzerland, Marburg, September 5-9, 2016
Bemerkung zur Veröffentlichung Book of Abstracts p.256
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