Remember Me
Or use your Academic/Social account:


Or use your Academic/Social account:


You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.


Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message


Verify Password:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Massey, Fergus P.; Ennos, Roland A.; Hartley, Sue E. (2007)
Publisher: Blackwell Publishing
Languages: English
Types: Article
Subjects: QK, QL

Classified by OpenAIRE into

mesheuropmc: food and beverages
The resource availability hypothesis (RAH) predicts that allocation of resources to anti-herbivore defences differs between species according to their growth rate. We tested this hypothesis by assessing the growth and defence investment strategies of 18 grass species and comparing them against vole feeding preferences. In addition, we assessed the effectiveness of silica, the primary defence in many grasses, in influencing vole feeding behaviour. Across species, we found that there was a strong negative relationship between the overall investment in defence and growth rate, thus supporting predictions of the RAH. However, no such relationship was found when assessing the various individual anti-herbivore defences, suggesting that different grass species show significant variation in their relative investment in strategies such as phenolic concentration, silica concentration and leaf toughness. Silica was the most influential defensive factor in determining vole feeding preference. Experimentally induced increases in leaf silica concentration deterred vole feeding in three of the five species tested, and altered feeding preference ranks between species. The strong positive relationship between silica concentration and leaf abrasiveness, when assessed both within and between species, suggests that increased abrasiveness is the mechanism by which silica deters feeding. Although grasses are often considered to be tolerant of herbivore damage rather then defended against it, they do follow predictions of defence allocation strategy based on their growth rates, and this affects the feeding behaviour of generalist grass-feeding herbivores.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Allen, S.E. (1989) Chemical Analysis of Ecological Materials. Second Edition. Blackwell Press, London, UK.
    • Bryant, J.P., Chapin, F.S., & Klein, D.R. (1983) Carbon nutrient balance of boreal plants in relation to vertebrate herbivory. Oikos, 40, 357-368.
    • Choong, M.F. (1996) What makes a leaf tough and how this affects the pattern of Castanopsis fissa leaf consumption by caterpillars. Functional Ecology, 10, 668-674.
    • o n0.05 o
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article