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Effects of elevated CO2 and temperature on plant growth and herbivore defensive chemistry
- T. Veteli, K. Kuokkanen, R. Julkunen‐Tiitto, H. Roininen, J. Tahvanainen
- Environmental Science
- 1 December 2002
Climate change may significantly modify the dynamic interaction between willow and beetle populations and thus affect herbivores living on this species.
Effects of reindeer browsing on tundra willow and its associated insect herbivores
It is shown that reindeer browsing in summer reduces biomass and diminishes reproductive success of willow; it also lowers the numbers of its associated insect herbivores, and is most evident in low-productivity tundra heaths where alternative forage plants are scarce.
EVOLUTION OF GALL MORPHOLOGY AND HOST‐PLANT RELATIONSHIPS IN WILLOW‐FEEDING SAWFLIES (HYMENOPTERA: TENTHREDINIDAE)
The results show that many of the patterns in the evolutionary history of nematine gallers have also been observed in earlier studies on other insect gallers, indicating convergent evolution between the independent radiations.
Phenolic glucosides as feeding cues for willow‐feeding leaf beetles
Feeding preferences of the tested leaf beetles were strongly influenced by certain phenolic glucosides which are typical secondary compounds of willows (Salicaceae: Salix).
The influence of windthrow area and timber characteristics on colonization of wind-felled spruces by Ips typographus (L.)
Terrestrial trophic dynamics in the Canadian Arctic
A trophic-balance model using ECOPATH was developed to integrate observations and determine the fate of primary and secondary production in these tundra ecosystems, which spanned an 8-fold range of standing crop of plants.
HOST-PLANT PREFERENCE OF AN INSECT HERBIVORE MEDIATED BY UV-B AND CO2 IN RELATION TO PLANT SECONDARY METABOLITES
Reindeer herbivory reduces willow growth and grouse forage in a forest-tundra ecotone
HOST PREFERENCE AND ALLOZYME DIFFERENTIATION IN SHOOT GALLING SAWFLY, EUURA ATRA
- H. Roininen, J. Vuorinen, J. Tahvanainen, R. Julkunen‐Tiitto
- BiologyEvolution; international journal of organic…
- 1 February 1993
This hypothesis that local populations of phytophagous insects associated with certain plant species are often highly specialized in their food selection and behavior is molded by selection to fit the conditions of optimal larval performance is supported by studies that have shown.
Leaf litter decomposition differs among genotypes in a local Betula pendula population
It is found that a local B. pendula population can have substantial genotypic variation in leaf litter mass loss at the early stages of the decomposition process and that this variation can be associated with genotype variation in herbivore resistance and leaf concentrations of soluble proteins and total nitrogen.