uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Resource allocation patterns in a forb and a sedge in two arctic environments - short-term response to herbivory
Univ Oulu.
Swedish EU, R&D Council.
2004 (English)In: Nordic Journal of Botany, ISSN 0107-055X, Vol. 22, no 6, 741-747 p.Article in journal (Refereed) Published
Abstract [en]

The present work investigates C and N allocation patterns in two forage plants: a forb, Oxyria digyna, and a sedge, Eriophorum angustifolium, in subarctic Sweden and high arctic Canada. Short-term changes in concentrations after simulated or natural herbivory (caused by Gynaephora groenlandica on Oxyria in the high arctic habitat) were also investigated. There were no clear differences in concentrations of C and N between the high arctic and subarctic sites in either species. In Oxyria of the subarctic habitat, the minimum N concentrations occurred at earlier phenological stages compared with plants in the high arctic habitat. Simulated herbivory increased the concentration of C in belowground tissues relative to those in control plants in Oxyria at the subarctic site, which may indicate increased allocation of non-C compounds to the growing shoots or daughter ramets. Herbivory by Gynaephora groenlandica caterpillars increased the N concentrations of Oxyria both in aboveground and belowground tissues, possible indicating increased uptake of N in the high arctic habitat. Eriophorum did not show clear trends in concentrations relating to habitat, phenology or simulated herbivory. The difference between Oxyria and Eriophorum in their response to herbivory apparently resulted from contrasting growth habits between the species. Tiller death after reproduction and long leaf life span may be the main reasons for the lack of clear patterns in concentrations in Eriophorum. Compensation after herbivory may be attained by the early production of daughter tillers in Eriophorum instead of the regrowth of the damaged ramets, as in Oxyria. Monitoring the responses for only one season is apparently a too short time period in these long-lived plants.

Place, publisher, year, edition, pages
2004. Vol. 22, no 6, 741-747 p.
URN: urn:nbn:se:uu:diva-202961ISI: 000222764000012OAI: oai:DiVA.org:uu-202961DiVA: diva2:634553
Available from: 2010-09-08 Created: 2013-07-01 Last updated: 2013-07-01Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Alatalo, Juha
In the same journal
Nordic Journal of Botany

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 180 hits
ReferencesLink to record
Permanent link

Direct link