Coping with branch excision when measuring leaf net photosynthetic rates in a lowland tropical forest

Lore T. Verryckt, Leandro Van Langenhove, Philippe Ciais, Elodie A. Courtois, Sara Vicca, Josep Peñuelas, Clément Stahl, Sabrina Coste, David S. Ellsworth, Juan M. Posada, Michael Obersteiner, Jérôme Chave & Ivan A. Janssens.
Measuring leaf gas exchange from canopy leaves is fundamental for our understanding of photosynthesis and for a realistic representation of carbon uptake in vegetation models. Since canopy leaves are often difficult to reach, especially in tropical forests with emergent trees up to 60 meters at remote places, canopy access techniques such as canopy cranes or towers have facilitated photosynthetic measurements. These structures are expensive and therefore not very common. As an alternative, branches are often...
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