Demographic consequences of chromatic leaf defence in tropical tree communities - do red young leaves increase growth and survival?

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dc.careerCiencias Biológicases
dc.category.authorprincipalen_US
dc.contributor.authorValencia Reyes, Luis Renato
dc.contributor.correspondingQueenborough, Simón, A.
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:35:52Z
dc.date.available2023-11-04T21:35:52Z
dc.date.issued2013
dc.dedication.authorTCes
dc.description.abstractBackground: Many tropical forest tree species delay greening their leaves until full expansion. This strategy is thought to provide newly flushing leaves with protection against damage by herbivores by keeping young leaves devoid of nutritive value. Because young leaves suffer the greatest predation from invertebrate herbivores, delayed greening could prevent costly tissue loss. Many species that delay greening also produce anthocyanin pigments in their new leaves, giving them a reddish tint. These anthocyanins may be fungicidal, protect leaves against UV damage or make leaves cryptic to herbivores blind to the red part of the spectrum. Methods: A comprehensive survey was undertaken of seedlings, saplings and mature trees in two diverse tropical forests: a rain forest in western Amazonia (Yasuní National Park, Ecuador) and a deciduous forest in Central America (Barro Colorado Island, Panamá). A test was made of whether individuals and species with delayed greening or red-coloured young leaves showed lower mortality or higher relative growth rates than species that did not. Key results: At both Yasuní and Barro Colorado Island, species with delayed greening or red young leaves comprised significant proportions of the seedling and tree communities. At both sites, significantly lower mortality was found in seedlings and trees with delayed greening and red-coloured young leaves. While there was little effect of leaf colour on the production of new leaves of seedlings, diameter relative growth rates of small trees were lower in species with delayed greening and red-coloured young leaves than in species with regular green leaves, and this effect remained when the trade-off between mortality and growth was accounted for. Conclusions Herbivores exert strong selection pressure on seedlings for the expression of defence traits. A delayed greening or red-coloured young leaf strategy in seedlings appears to be associated with higher survival for a given growth rate, and may thus influence the species composition of later life stages.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author1706673199
dc.id.type1
dc.identifier.doi10.1093/aob/mct144
dc.identifier.issn1095-8290 - 0305-7364
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/5466
dc.identifier.urihttp://aob.oxfordjournals.org/content/early/2013/07/22/aob.mct144.short
dc.indexed.databaseOtheres
dc.language.isoen
dc.list.authorsQueenborough, S., Metz, M., Valencia, R., Wright, J.
dc.magazine.pageRange265-268.
dc.magazine.titleAnnals of Botanyen_US
dc.magazine.volumeChapter63 (2)
dc.rightsClosedAccessen
dc.statepublisheden_US
dc.subjectDelayedes
dc.subjectGreeninges
dc.subjectSeedlinges
dc.subjectHerbivoryes
dc.subjectYounges
dc.subjectLeaf coloures
dc.subjectSeedlingses
dc.subjectTropical forestes
dc.subjectDelayed
dc.subjectGreening
dc.subjectSeedling
dc.subjectHerbivory
dc.subjectYoung
dc.subjectLeaf colour
dc.subjectSeedlings
dc.subjectTropical forest
dc.titleDemographic consequences of chromatic leaf defence in tropical tree communities - do red young leaves increase growth and survival?en_US
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