Tree species diversity influences herbivore abundance and damage: meta-analysis of long-term forest experiments

@article{Vehvilinen2007TreeSD,
  title={Tree species diversity influences herbivore abundance and damage: meta-analysis of long-term forest experiments},
  author={Harri Vehvil{\"a}inen and Julia Koricheva and Kai Ruohom{\"a}ki},
  journal={Oecologia},
  year={2007},
  volume={152},
  pages={287-298}
}
Plant monocultures are commonly believed to be more susceptible to herbivore attacks than stands composed of several plant species. However, few studies have experimentally tested the effects of tree species diversity on herbivory. In this paper, we present a meta-analysis of uniformly collected data on insect herbivore abundance and damage on three tree species (silver birch, black alder and sessile oak) from seven long-term forest diversity experiments in boreal and temperate forest zones… 
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This large-scale study shows that tree height growth in young forest plantations tends to be higher in species mixtures than in monocultures, but incremental increases in functional diversity have, at best, weak marginal growth benefits.
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The results show that predator abundance does not increase uniformly with increase in tree species diversity, but suggest that predators have distinct preferences for stands composed of particular tree species and that these species preferences may overrule the effects of diversity.
Tree Species Richness Promotes Invertebrate Herbivory on Congeneric Native and Exotic Tree Saplings in a Young Diversity Experiment
TLDR
An increase in tree species richness in young temperate forests may result in associational susceptibility to feeding by generalist herbivores, particularly among congeneric native and exotic species pairs.
Sapling herbivory, invertebrate herbivores and predators across a natural tree diversity gradient in Germany’s largest connected deciduous forest
TLDR
It is concluded that, in temperate deciduous forests, herbivory–tree diversity relationships are significant, but are tree species-dependent with bottom-up and top-down control as possible mechanisms.
Tree diversity promotes generalist herbivore community patterns in a young subtropical forest experiment
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