The Effects of Tree Size, Stand Density, and Tree-Species Mixing on Stand Level and Tree Level Light Absorption and Light-Use Efficiency: A Review

Abstract Purpose of Review Tree species mixtures are often more productive than monocultures. One possible reason for this is higher absorption of photosynthetically active radiation (APAR) and improved light use efficiency (LUE) in mixtures. Here, we identified the processes influencing APAR and LUE in forests, examined how APAR and LUE are influenced by mixing species or reducing stand density, how these effects vary along site gradients, and implications for modelling of forest growth. Recent