Methodology

Leaf physiology

At each site we measured dark leaf respiration and light saturated leaf photosynthesis using the CIRAS 2 leaf gas exchange analyzer (Company name, web site) on between 15-25 trees once during the wet season and once during the dry season returning to the same tree. We sampled the same trees that were being measured for trunk respiration and randomly cut one sunlit and one shaded branch from each tree which was immediately recut underwater to restore hydraulic connectivity. For dark respiration, we placed the leaf in a black bag for ten minutes prior to measurement. We either controlled CO2 concentrations at 400ppm or used atmospheric air and a buffer to stabilize atmospheric CO2 variability. We controlled the leaf chamber temperature at 25 oC and light levels at 1000 umol m-2 s-1 for light saturated photosynthesis and 0 umol m-2 s-1 for dark respiration.

Where are we working?

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People

  • Thumb_malhi_pic_forest

    Yadvinder Malhi

    I am Professor of Ecosystem Science at Oxford University.
    I lead the Ecosystems Programme at the Environmental Change Institute, with a focus of understanding the functioning of tropical forests and...

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    Erika Berenguer

    I am interested in the resilience of tropical forests in human-modified landscapes. Specifically, I investigate how human disturbances, such as selective logging and wildfires, impact carbon stocks in the Amazon.

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    Georgia Pickavance

    I am a Database Assistant, supporting the tropical forest database ForestPlots.net and associated research projects RAINFOR, Afritron and T-FORCES. I am studying for a Masters in GIS alongside my research...

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    Akwasi Duah-Gyamfi

    I am a Research Scientist with the Forestry Research Institute of Ghana (FORIG) with particular interest in the role of tropical forests in global carbon cycle/budget as well as population...

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    Gregory Asner

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    Renata Freitag

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    Cécile Girardin

    I coordinate carbon cycling data for the GEM network. I am an ecosystems scientist focussing on carbon dynamics of tropical forest ecosystems. Following my PhD at Oxford University School of...

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    Norma Salinas

    I am a postdoctoral research assistant at the University of Oxford. I am working with plant traits along altitudinal gradients in tropical forests. My research involve many aspects of tropical...

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    Greg Goldsmith

    I am a tropical plant physiological ecologist with a particular interest in plant-water relations. My doctoral research, based at the University of California, Berkeley, focused on the impacts of drought...

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    Sandra Diaz

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    Sam Moore

    I am a Post-doc at the University of Oxford, School of Geography and the Environment, Environmental Change Institute and I am currently implementing studies of carbon allocation and cycling at...

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    Jos Barlow

    I'm interested in understanding how human activities influence the value of tropical forests for species conservation, ecosystem functioning and the livelihoods of local people.

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    Oliver Phillips

    My long-term research goal is to understand the dynamics of carbon and biodiversity across the world’s tropical forests, how these change with our changing climate, and how they may feedback...

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    Vianet Mihindou

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    Vilma Champi Ayma

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