Plant Ecology

, Volume 169, Issue 2, pp 285–294

Differential response of trees and shrubs to browsing and pruning: the effects on Pistacia growth and gall-inducing aphids

  • J.-J.Y. Martinez
  • D. Wool
Article

DOI: 10.1023/A:1026085307964

Cite this article as:
Martinez, JJ. & Wool, D. Plant Ecology (2002) 169: 285. doi:10.1023/A:1026085307964

Abstract

The effects of long term browsing on growth and morphology of P. atlantica trees and P. palaestina shrubs, and on the colonization of these hosts by their respective gall-inducing aphid guilds, were studied in natural vegetation pastures in Israel. To simulate apical dominance release by browsing, trees and shrubs were pruned and observed one year later. P. atlantica responded strongly to browsing, producing a crown of dense and sharp dry branches and thorn-like shoots, and pruning, compensating or overcompensating for the lost biomass in the studied morphological variables. Morphological responses of P. palaestina were less evident: we found no compensation in most variables. Three species of aphids produced more galls on browsed than on control shoots of P. atlantica. Two species induced more galls on pruned shoots. The five aphid species on P. palaestina colonized browsed and unbrowsed shoots equally, and produced fewer galls on pruned shoots. The role of apical dominance in architectural responses of trees and shrubs to browsing and pruning, as related to resource availability and timing, is discussed.

Apical dominance Ecological engineers Herbivory Plant architecture Resource availability Timing 

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • J.-J.Y. Martinez
    • 1
  • D. Wool
    • 1
  1. 1.Department of Zoology, George S. Wise faculty of Life SciencesTel Aviv UniversityRamat AvivIsrael

Personalised recommendations