Leaf water use in heterobaric and homobaric leafed canopy tree species in a Malaysian tropical rain forest

2015 ◽  
Vol 53 (2) ◽  
pp. 177-186 ◽  
Author(s):  
Y. Inoue ◽  
T. Kenzo ◽  
A. Tanaka-Oda ◽  
A. Yoneyama ◽  
T. Ichie
Keyword(s):  
Water Use ◽  
Tree Species ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Leaf Water ◽  
Canopy Tree ◽  
Canopy Tree Species

Above ground response of rainforest functional groups to experimental drought

2020 ◽  
Author(s):  
Angelika Kübert ◽  
Kathrin Kühnhammer ◽  
Ines Bamberger ◽  
Erik Daber ◽  
Jason De Leeuw ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Ground Water ◽  
Functional Groups ◽  
Water Use ◽  
Tree Species ◽  
Rain Forest ◽  
Understory Species ◽  
Canopy Tree ◽  
Use Efficiency ◽  
Canopy Tree Species

<p>Functional group-specific water use strategies are vital in understanding plant performance under current and future global climate change related drought scenarios. Different functional groups have different strategies to regulate their above ground water use and loss in order to respond to drought stress. Here, we studied the ecohydrological response of a controlled rain forest system to a 10-week lasting experimental drought (Biosphere 2 Water, Atmosphere, and Life Dynamics, B2 WALD project). Using gas exchange chambers, we specifically investigated the response of the two main rain forest functional groups - three canopy tree species and two understory species - in their above ground water use efficiency. Rates and isotopic fluxes of transpiration, assimilation and night respiration were monitored in high temporal resolution. In combination with plant physiological information (i.e., leaf water potential) a complete picture of their above ground water use could be gained. We expect that the deep rooting canopy tree species will be able to keep their above ground water use constant while the shallow rooting understory species will have to adapt their water use efficiency to budget their water reserves and resources.</p>

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