Woody C3 and C4 plants vs. climate change

Aims:

  • to investigate past and present response of woody C3 and C4 plants to climate change
  • to get better insight into the long-term variability of growth and water-use efficiency of woody C3 and C4 plants
  • to extend back in time the instrumental records of atmospheric CO213CO2, CO2 concentration) utilizing δ13C of tree rings from C4 plants
  • to assess δ13C of woody C4 plants as bioproductivity indicators for the northern hemisphere
  • to elucidate  the potential for adaptation of C3 and C4 plants to climate change

Study sites and Material:

  • C3 (Mamane, Sophora chrysophylla) and C4 (Akoko, Euphorbia olowaluana), from Pohakuloa Training Area, Hawaii (ridge between Mauna Loa and Mauna Kea)
  • High quality instrumental data records from the nearby Mauna Loa Observatory (MLO), with continuous direct measurements of atmospheric CO2 since 1958 for isotope proxy data calibration

Methods:

  • Measurement of growth increment periodicity and the stable isotope ratios of carbon and oxygen in tree ring cellulose
  • Dendroecological long-term monitoring of  Hawaiian woody C3 and C4 plants
Akoko stem disk, PTA, Hawaii, USA
(GFZ)

Kontakt

Gerhard Helle
Arbeitsgruppenleiter
Dr. Gerhard Helle
Klimadynamik und Landschaftsentwicklung
Telegrafenberg
Gebäude D, Raum 220
14473 Potsdam
+49 331 288-1377
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Projektdaten

Zuwendungsgeber

Status

Laufend