Small-scale indirect plant responses to insect herbivory could have major impacts on canopy photosynthesis and isoprene emission

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dc.contributor.authorVisakorpi, Kristiina
dc.contributor.authorGripenberg, Sofia
dc.contributor.authorMalhi, Yadvinder
dc.contributor.authorBolas, Conor
dc.contributor.authorOliveras, Imma
dc.contributor.authorHarris, Neil R. P.
dc.contributor.authorRifai, Sami
dc.contributor.authorRiutta, Terhi
dc.date.accessioned2018-07-31T10:08:48Z
dc.date.available2018-07-31T10:08:48Z
dc.date.issued2018-07-26
dc.description.abstractSummary Insect herbivores cause substantial changes in the leaves they attack, but their effects on the ecophysiology of neighbouring, nondamaged leaves have never been quantified in natural canopies. We studied how winter moth (Operophtera brumata), a common herbivore in temperate forests, affects the photosynthetic and isoprene emission rates of its host plant, the pedunculate oak (Quercus robur). Through a manipulative experiment, we measured leaves on shoots damaged by caterpillars or mechanically by cutting, or left completely intact. To quantify the effects at the canopy scale, we surveyed the extent and patterns of leaf area loss in the canopy. Herbivory reduced photosynthesis both in damaged leaves and in their intact neighbours. Isoprene emission rates significantly increased after mechanical leaf damage. When scaled up to canopy‐level, herbivory reduced photosynthesis by 48 ± 10%. The indirect effects of herbivory on photosynthesis in undamaged leaves (40%) were much more important than the direct effects of leaf area loss (6%). If widespread across other plant–herbivore systems, these findings suggest that insect herbivory has major and previously underappreciated influences in modifying ecosystem carbon cycling, with potential effects on atmospheric chemistry.en_UK
dc.identifier.citationVisakorpi K, Gripenberg S, Malhi Y, et al., Small-scale indirect plant responses to insect herbivory could have major impacts on canopy photosynthesis and isoprene emission. New Phytologist, Volume 220, Issue 3, November 2018, pp. 799-810en_UK
dc.identifier.cris20603623
dc.identifier.issn0028-646X
dc.identifier.urihttp://dx.doi.org/10.1111/nph.15338
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13370
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectCanopyen_UK
dc.subjectCarbon cyclingen_UK
dc.subjectHerbivoryen_UK
dc.subjectIsopreneen_UK
dc.subjectPhotosynthesisen_UK
dc.subjectQuercus roburen_UK
dc.titleSmall-scale indirect plant responses to insect herbivory could have major impacts on canopy photosynthesis and isoprene emissionen_UK
dc.typeArticleen_UK

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