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Related Concept Videos

Adaptations that Reduce Water Loss01:57

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Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
10:20

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Published on: March 12, 2013

Leaf drop affects herbivory in oaks.

Ian S Pearse1, Richard Karban

  • 1Department of Entomology, University of California, Davis, USA, ianspearse@gmail.com.

Oecologia
|June 19, 2013
PubMed
Summary
This summary is machine-generated.

Leaf drop timing significantly impacts herbivore abundance on oak trees. Intermediate leaf retention and early leaf development reduce insect pests, influencing plant defenses against herbivores.

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Area of Science:

  • Ecology
  • Plant-herbivore interactions
  • Evolutionary biology

Background:

  • Leaf phenology, particularly leaf drop, is crucial for understanding herbivore interactions with deciduous plants.
  • The role of leaf drop timing and extent in shaping herbivore communities remains understudied.

Purpose of the Study:

  • To investigate the relationship between oak leaf phenology and leaf miner abundance.
  • To determine how leaf retention, leaf maturation, and plant defenses influence herbivore load.

Main Methods:

  • Phylogenetic general least squares regression was used to analyze data from 55 oak species in a common garden.
  • Leaf phenology traits (leaf retention, leaf set timing, maturation rate) were compared with leaf miner abundance.

Main Results:

  • Leaf miner abundance peaked on trees with intermediate leaf retention (2-3 months of leaf loss).
  • Evergreen species with sclerotized leaves had fewer summer mines.
  • Highly deciduous species and those with later leaf set/slower maturation accumulated fewer herbivores.

Conclusions:

  • Both leaf drop and early leaf phenology are key factors influencing herbivore abundance and driving plant defense evolution.
  • Leaf drop may serve as a mechanism to shed overwintering herbivores, necessitating recolonization in spring.
  • Species with prolonged leaf retention exhibit stronger direct defenses against herbivores.