Low-intensity insect herbivory could have large effects on ecosystem productivity through reduced canopy photosynthesis

HIGHLIGHTS

  • What: The authors propose that the effect of insect herbivory on primary productivity is non-linear and determined mainly by changes in leaf gas exchange and the pattern at which herbivory spreads through the canopy. This might be because many of the studies reporting large herbivory-induced changes in plant gas exchange have been conducted in laboratory or greenhouse settings and on herbaceous species (Meza-Canales et_al, 2017; Zangerl et_al, 2002) or on potted seedlings (Kivimäenpää et_al, 2016) and have focused on investigating the effects on small scales, for example, within leaves (Zangerl et_al, 2002).
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