Translator Disclaimer
1 April 2006 Interaction between a lichen and a fungal parasite in a successional community: Implications for conservation
Author Affiliations +
Abstract
Question Populus tremula (Aspen) is a post-fire successional tree with a large number of host-specific lichens. One, Ramalina sinensis, will colonize very young aspen stands. The apothecia of this species are attacked by a parasitic fungus, Abrothallus suecicus. The incidence and severity of disease caused by this parasite was studied in nine stands between 22 and 180 years old.Location: Central Sweden.Method: Thalli of R. sinensis were randomly sampled from nine stands. Each thallus was weighed and the number of diseased and non-diseased apothecia were scored for each thallus.Results: The data show (1) an increase in both disease incidence and disease severity with increasing stand age; (2) that smaller thalli show an increasing probability of being diseased in older stands; (3) that high disease levels prevail in older aspen stands; and (4) a broad variation in disease severity for thalli of similar size in the four older stands.Conclusions: The studied chronosequence is too short to elucidate whether the Abrothallus-Ramalina system is driven by disease escape in space and time, or co-existence. However, the high disease levels in older stands suggest that conservation programs aiming to sustain this system cannot only focus on preservation of isolated old-growth stands, but also need to incorporate continuous creation of young stands. If succession is ignored, conservation of organisms originally adapted to, now vanishing, large-scale disturbance regimes is likely to fail. We point out the need to assess the role of disease in conservation.Nomenclature: Hawksworth et al. (1995); Karlsson (1997); Santesson et al. (2004).
H. Hedenås, K. Lundin and L. Ericson "Interaction between a lichen and a fungal parasite in a successional community: Implications for conservation," Journal of Vegetation Science 17(2), (1 April 2006). https://doi.org/10.1658/1100-9233(2006)17[207:IBALAA]2.0.CO;2
Received: 24 November 2004; Accepted: 29 June 2005; Published: 1 April 2006
JOURNAL ARTICLE
10 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top